Aurora in Denver on September 21, 2026

September 21, 2026

Denver change region

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Probability of aurora in Denver

Probability of aurora as of end of day, September 21, 2026, Denver time

0 % Denver

Aurora intensity index

Auroral intensity index (0.8) and estimated minimum latitude of auroral observations at zenith as of the end of September 21, 2026, Denver time

Aurora over North America

Changes in the auroral oval on September 21, 2026 in United States from the beginning to the end of the day, Coordinated Universal Time (UTC)

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Aurora in the northern hemisphere

Changes in the auroral oval on September 21, 2026 in the northern hemisphere from the beginning to the end of the day, Coordinated Universal Time (UTC)

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Probability of aurora in cities of United States

Estimated probabilities of aurora observations at zenith for cities in United States as of end of day September 21, 2026.

0 % Washington

0 % New York

0 % Chicago

0 % Philadelphia

0 % Seattle

0 % Detroit

0 % Portland

0 % Boston

0 % Madison

0 % Bismarck

0 % Olympia

0 % Helena

0 % Saint Paul

4 % Fairbanks

0 % Anchorage

1 % Juneau

0 % Hooper Bay

1 % Nome

2 % Kotzebue

6 % Utqiagvik

0 % Bethel

1 % Cordova

Aurora intensity over 2 days

Changes in the auroral intensity index from September 20 to 21, 2026 in the northern hemisphere, Denver time. Maximum — 2.0/10

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