How this week’s solar eclipse will alter the weather
A total solar eclipse is expected to cause measurable drops in temperature, wind speed, and humidity along its path across the Arctic and Europe. The intensity of these weather changes depends on factors like cloud cover and the sun's angle.
Why it matters
Understanding the atmospheric impact of eclipses helps meteorologists refine climate models and weather prediction accuracy.
Researchers watch the total solar eclipse in Mexico on April 8, 2024. - Cesar Rodriguez/The Washington Post/Getty Images Wednesday's total solar eclipse will alter weather conditions along its path from the Arctic to western Europe.
Changes to temperature, wind speed and humidity occur as the moon crosses in front of the sun during a solar eclipse and casts a shadow on Earth's surface. This reduces the amount of solar radiation — sunlight and energy – that makes it to the surface.
The more solar radiation blocked, no matter how brief, the more dramatic the weather changes. The effect is comparable to how shaded areas end up much cooler on a hot day than any place in direct sunlight.
Wednesday's eclipse will completely block out the sun along a narrow path in northern Russia, parts of Greenland, Iceland, Portugal and Spain, providing the opportunity for more noticeable changes in spots.
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