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139 million NOAA observations spanning 55 years across 327 U.S. cities, 94 international destinations, and 63 national parks.
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The Deadliest Hurricanes in US History
The 15 deadliest US hurricanes ranked. From Galveston 1900 (8,000+ dead) to Helene 2024. Plus the 10 costliest storms and which states get hit most.
The Worst Blizzards in US History
The 12 worst US blizzards ranked. From the Great Blizzard of 1888 to Winter Storm Uri ($195B damage). The Children's Blizzard, Storm of the Century, and more.
The Worst Heat Waves in US History
The 10 deadliest US heat waves ranked by death toll. What NOAA stations actually recorded, why nighttime heat kills, and why the trend is getting worse.
4th of July Weather History: Every Independence Day on Record
City-by-city averages for 40 cities, the hottest and deadliest July 4ths, and why your Independence Day is hotter than it used to be.
Best Time to Visit Glacier: When the Road Opens, When Smoke Arrives
12 years of Going-to-the-Sun Road opening dates, wildfire smoke history, and valley vs Logan Pass weather — the two factors that make or break a Glacier trip.
Best Time to Visit Grand Canyon: Three Climate Zones, One Decision
South Rim, North Rim, and inner canyon compared with NOAA data. Phantom Ranch heat danger, monsoon season, and 2026 North Rim fire impact.
Best Time to Visit Yellowstone: Month-by-Month Weather Data
NOAA station data from 4 locations, 2026 road openings, wildlife windows, and crowd levels — month by month.
Best Time to Visit Zion: Flash Flood Risk, Heat Safety & Trail Data
Canyon floor vs rim temperatures, Narrows closure thresholds, flash flood ratings by month, and Angels Landing heat safety.
Hurricane Season 2026: El Niño Suppression & Dueling Forecasts
CSU says 13 storms. The U of Arizona says 20. Every El Niño hurricane season since 1991 analyzed, plus state-by-state risk from 170+ years of NOAA data.
El Niño 2026 Forecast: Super El Niño Could Be Strongest on Record
94% likely by late 2026. 50% chance of a super event — up from 25% in April. Region-by-region impact analysis from NOAA data.
The Hottest Temperatures Ever Recorded in Every US State
Death Valley's 134°F. The 1936 Dust Bowl. The 2021 heat dome. May 2026 extreme heat. All 50 state records ranked.
Tornado Season 2026: An EF5 Already, and the Peak Still Ahead
500+ tornadoes, 11 deaths, an EF5 in Indiana — the most active tornado season start since 2011.
The Coldest Temperatures Ever Recorded in Every US State
All 50 states ranked from -80°F in Alaska to +15°F in Hawaii.
Summer 2026 Weather Outlook: Three Signals Pointing Toward a Hot One
El Niño, drought, and 55 years of warming trends — what the data says.
Winter 2025-26 Was the 2nd Warmest on Record
City-by-city breakdown of record winter temperatures across the US.
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About Weather On This Day
Discover historical weather patterns with our comprehensive database of 139 million+ weather records spanning 55+ years. Whether you're planning a wedding, researching climate trends, or just curious about what the weather was like on your birthday, we've got the data you need.
Our data comes from NOAA's Climate Data Online, covering thousands of weather stations across the United States and international locations.