Auroras (northern lights) in Helena — Sep 29, 2025
Probability of northern lights in Helena
Information as of 2025-09-29 23:49 (end of day) local time in Helena
8 %
Helena
Aurora intensity index
Auroral intensity index and the theoretically possible latitude of observations for nighttime in the Western Hemisphere as of 2025-09-29 23:49 (end of day) local time
Northern lights (auroras) over North America
Changes from 2025-09-29 to 2025-09-30 UTC
Northern lights (auroras) in the northern hemisphere
Changes from 2025-09-29 to 2025-09-30 UTC
Probability of northern lights (auroras) in cities of United States
Information as of 2025-09-29 23:49 (end of day) local time in Helena
0 %
Washington
0 %
New York
1 %
Chicago
0 %
Philadelphia
7 %
Seattle
1 %
Detroit
2 %
Portland
0 %
Boston
2 %
Madison
12 %
Bismarck
4 %
Olympia
8 %
Helena
6 %
Saint Paul
91 %
Fairbanks
48 %
Anchorage
54 %
Juneau
24 %
Hooper Bay
48 %
Nome
68 %
Kotzebue
73 %
Utqiagvik
26 %
Bethel
58 %
Cordova
Polar auroras over the past 2 days
Changes in the auroral intensity index from 2025-09-28 to 2025-09-29 local time
