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Hourly WeatherHacienda Heights, California 91745 · as of 1:30 AM UTC

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We Love Our Critters

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Travel

California Wildflower Superblooms Are Back In 2026

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Seasonal Hub

Why Your Immune System Struggles With Seasonal Changes

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Editor's Pick

Allergy Season Grows Longer – Especially In These Places

Is the seasonal part of “seasonal allergies” becoming a thing of the past? Newly released data from Climate Central shows that since the 1970s, allergy season has grown longer in every part of the United States, by an average of 21 extra “freeze-free” days. That gives plants more time to grow and release the pollen that makes so many of us miserable. Watch this video to see how much longer allergy season is in your area.

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Why Your Immune System Struggles With Seasonal Changes

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Sun & Moon

Looking Up? Light Pollution Can Ruin Your Viewing Night

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