Aurora in Helena on August 18, 2026

August 18, 2026

Helena change region

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Probability of aurora in Helena

Probability of aurora as of end of day, August 18, 2026, Helena time

3 % Helena

Aurora intensity index

Auroral intensity index (3.2) and estimated minimum latitude of auroral observations at zenith as of the end of August 18, 2026, Helena time

Aurora over North America

Changes in the auroral oval on August 18, 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 August 18, 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 August 18, 2026.

0 % Washington

0 % New York

1 % Chicago

0 % Philadelphia

2 % Seattle

1 % Detroit

1 % Portland

0 % Boston

1 % Madison

6 % Bismarck

1 % Olympia

3 % Helena

3 % Saint Paul

29 % Fairbanks

11 % Anchorage

16 % Juneau

6 % Hooper Bay

13 % Nome

22 % Kotzebue

33 % Utqiagvik

5 % Bethel

15 % Cordova

Aurora intensity over 2 days

Changes in the auroral intensity index from August 17 to 18, 2026 in the northern hemisphere, Helena time. Maximum — 4.2/10

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