Yes, It Really Does Rain More on Weekends

Jul 03, 2026 17:06 · 7:38 · English · Whisper Turbo · 2 Ahotsak
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S… Speaker 2 (Yes, It Really Does Rain More on Weekends)
for many of the years that i lived in boston the springtime weeks were
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full of clear sunny skies but every single weekend provided
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soggy miserable weather what gives is it just my imagination that
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every single weekend it seems to rain or were the rainy days more noticeable
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because they were interrupting my weekend plans did a weather god curse
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the northeast united states or
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is it some weird meteorological phenomenon funnily enough it's
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that last thing weather in new england can be oddly punctual
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so here's the science of the rainy weekend curse rain
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in the spring is no surprise
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to north americans with april showers bring may flowers and everything but
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in 2023 2024
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And 2025,
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Boston,
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New York,
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and the rest of the Northeastern US were stuck with beautiful sunny work weeks and
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overwhelmingly rainy weekends.
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In both 2024 and 2025,
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Boston received stretches of at least six consecutive rainy
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weekends in the spring.
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S… Speaker 2 (Yes, It Really Does Rain More on Weekends)
And from January through June,
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there were far more weekends with rain than without.
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S… Speaker 2 (Yes, It Really Does Rain More on Weekends)
2023 was an especially wet year,
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bringing record rainfall all over the Northeast.
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And by October,
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in New York and Boston,
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S… Speaker 2 (Yes, It Really Does Rain More on Weekends)
only 12 out of 42 of the year's weekends had been sunny.
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That's rain during...
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S… Speaker 2 (Yes, It Really Does Rain More on Weekends)
80 percent of weekends at some point you start to think that this can't just
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be a coincidence so meteorologists took a deeper look at the weather patterns
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trapping the northeast indoors every weekend it's easy to forget that air is a
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fluid and that it has mass we live our whole lives in it and move through
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S… Speaker 2 (Yes, It Really Does Rain More on Weekends)
it so effortlessly yet it's constantly pressing down on us and swirling
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S… Speaker 2 (Yes, It Really Does Rain More on Weekends)
about air is subject to the laws of fluid dynamics on a planetary scale
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those effects can really add up we experience these effects as weather and
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meteorologists
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events are all driven by differences in temperature and pressure throughout
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the atmosphere.
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The jet streams have an especially big impact.
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S… Speaker 2 (Yes, It Really Does Rain More on Weekends)
You might have heard your airplane's pilot mention the jet stream.
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It's like a river of fast -moving air that travels from west to east across
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the globe, but it affects way more than just your flight time.
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S… Speaker 2 (Yes, It Really Does Rain More on Weekends)
Jet streams exist because of fluid mechanics.
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S… Speaker 2 (Yes, It Really Does Rain More on Weekends)
The equator gets more sunlight than the poles do,
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which means the air is warmer around the Earth's middle.
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As the air gets warmer,
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it expands and rises.
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creating a low pressure zone.
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On the other hand,
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the cold,
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dense air at the poles forms a high pressure zone.
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Air rushes from the regions of high pressure into the regions of low pressure.
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On a global scale,
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this means that cold air from the poles floods toward the equator and
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light warm air drifts poleward above it.
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The cold air packets warm up at the equator,
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rising to replenish the low pressure zone,
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and the warm air packets cool down at the poles to sustain the high
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pressure zone.
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This sets up a cycle of air constantly moving from the equator to poles
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and back again.
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But don't forget,
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the Earth is also rotating.
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Air rotates with the Earth,
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constantly getting dragged to the east.
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Because of this,
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the rising air from the equator never actually makes it to the poles.
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The Earth's rotation,
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plus all the bumpiness of the Earth's surface,
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causes the circulation pattern to be split into three different circulation cells.
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From the equator to about 30 degrees north or south,
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we have the Hadley cells.
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beyond that are the mid -latitude cells or Pharrell cells,
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and finally the polar cells over the north and south poles.
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The boundaries between two different cells result in jet streams.
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They separate regions of cold and warm air,
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which means the jet streams are fueled by the Earth's steady rotation and
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that differential warming from the sun.
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In particular,
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the northern polar jet stream is what keeps arctic air
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over the Arctic,
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and it's strongest in the winter when temperature differences are most stark.
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The polar jet stream also controls most weather in the mid -latitudes of
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the northern hemisphere,
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like Boston,
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which sits at about 42 degrees north.
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Another key thing about fluids is that they're really easily perturbed.
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The jet stream is really just a river of air,
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so obstacles like a mountain range,
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open ocean,
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or just a random high pressure zone can easily disturb it and give
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it a little wiggle.
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When all these wiggles add up,
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the jet stream settles in
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a pattern called a raspy wave that encircles the pole.
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Usually for the polar jet stream this wave pattern will have about four to
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six dips in it.
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Sometimes these wiggles move north or south and occasionally a trough might
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disappear or reappear all of a sudden.
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Meteorologists refer to the jet stream's wiggles as meandering.
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How cute!
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Maybe I should meander more.
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For the most part,
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the Rasby wave pattern is pretty stable,
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meaning the pattern doesn't change all that much,
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but it will slowly rotate around the globe.
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In the springtime,
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more intense solar radiation adds energy to the air and the
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ocean.
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Temperature differences between the Arctic and the mid -latitudes become less pronounced,
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which weakens the jet stream.
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When our air river isn't moving as fast,
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it's more sensitive to disturbances,
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so the Rasby waves can become even wavier with the
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waves troughs dipping to lower latitudes than before.
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This is important because storm patterns tend to follow the leading edge of
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these troughs.
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The troughs carry low pressure zones,
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the warmer air we talked about earlier.
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Air at the boundaries of these low pressure zones rushes in and flows upward.
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As it rises,
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it cools,
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and the water it carried condenses to form storm clouds.
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What this adds up to is that the Rosby waves slowly rotate around
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the Earth.
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carrying storms with them as they go.
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Rosby waves move at a characteristic speed that depends on how many troughs
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they have.
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This means the broad river of air slowly rotates so that the troughs
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change position.
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And that cycle takes anywhere between five and 10 days.
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See where I'm going with this?
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Sometimes the troughs will be spaced about seven days apart.
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And sometimes that pattern will be centered on the weekends.
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Because once the rosby wave takes shape and gets stuck in one of its patterns,
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it can be really hard to break out.
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Rasby waves form naturally in the jet stream based on the Earth's topography,
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but sometimes other climate patterns can additionally amplify or
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shape those wobbles and troughs.
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For example,
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persistent high pressure zones can also set up blocking patterns,
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like one that often gets stuck over Greenland.
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The low pressure troughs must deflect around the zone that's blocked,
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forcing a specific shape into the meandering jet stream.
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And that?
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can cause the whole shebang to get stuck in a specific pattern.
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Hello,
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soggy Saturdays.
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Rainy weekends aren't the only consequence of these persistent anomalies in
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the jet stream.
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The jet stream also helps keep Western Europe pretty temperate,
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and it's what makes the Mediterranean region warm and dry for most of the year.
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So while Boston and New York get hit with perpetually rainy summer weekends,
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record -breaking heat waves and floods can get stuck over Europe.
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This isn't just a summertime issue either.
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Destabilization of the jet stream
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is associated with polar vortexes and Arctic blasts.
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During these events,
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pockets of Arctic air can push down from the Arctic Circle,
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bringing extreme cold with them.
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These effects are increasingly common in the US,
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particularly over the Midwest and Great Plains regions.
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Hopefully in 2026,
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we won't get stuck again in these weather patterns that keep us stuck indoors.
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But if you live in the Northeast US,
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I'm sorry to say that you might need to get your vitamin D dose on your weekday lunch
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breaks and settle for indoor museums and umbrellas on the weekends.

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