Weather in Juneau City and Borough, Alaska for September 2025
Special Weather Statement - See hour by hour.
So far, September 2025 in Juneau City and Borough shows a warmer trend than usual by 2.4 °F.
Expect cooler weather in the next days in Juneau City and Borough with the forecast suggesting a temperature of 8.1 °F, lower than the historical average.
In general, the average temperature in Juneau City and Borough at the beginning of September is 11.9 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 7.7 °F by the end of September.
Juneau City and Borough experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 399.7 mm.
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Juneau City and Borough Weather September
Temperatures trend during September in Juneau City and Borough
September weather in Juneau City and Borough day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Light rain shower | 13° /6° | 6.6 mm | 3 | |
| Sept. 2 | Light rain shower | 12° /5° | 3.8 mm | 3 | |
| Sept. 3 | Light rain shower | 13° /6° | 3.2 mm | 3 | |
| Sept. 4 | Light rain shower | 11° /6° | 9.4 mm | 3 | |
| Sept. 5 | Light rain shower | 13° /6° | 7.9 mm | 3 | |
| Sept. 6 |  Light rain | 10° /6° | 8.5 mm | 2 | |
| Sept. 7 | Light rain shower | 11° /5° | 14.7 mm | 3 | |
| Sept. 8 | Patchy rain possible | 11° /4° | 13.3 mm | 3 | |
| Sept. 9 | Light drizzle | 11° /5° | 1.9 mm | 3 | |
| Sept. 10 |  Sunny | 13° /6° | 11.6 mm | 4 | |
| Sept. 11 | Light drizzle | 10° /5° | 12.8 mm | 3 | |
| Sept. 12 |  Fog | 9° /5° | 15 mm | 2 | |
| Sept. 13 |  Moderate rain | 10° /4° | 13.9 mm | 2 | |
| Sept. 14 | Moderate rain | 10° /4° | 29.1 mm | 3 | |
| Sept. 15 | Moderate rain | 8° /6° | 9.9 mm | 0.1 | |
| Sept. 16 | Moderate rain | 10° /6° | 9.3 mm | 0.3 | |
| Sept. 17 |  Heavy rain | 9° /7° | 23.4 mm | 0.1 | |
| Sept. 18 | Patchy rain possible | 10° /5° | 1.3 mm | 0.4 | |
| Sept. 19 | Moderate rain | 8° /5° | 18.4 mm | 0 | |
| Sept. 20 | Moderate rain | 8° /6° | 18 mm | 2 | |
| Sept. 21 | Moderate rain | 7° /5° | 7.2 mm | 2 | |
| Sept. 22 | Moderate rain | 7° /4° | 5.8 mm | 1 | |
| Sept. 23 | Patchy rain possible | 7° /4° | 0.8 mm | 1 | |
| Sept. 24 | Sunny | 9° /1° | 0 mm | 2 | |
| Sept. 25 |  Partly cloudy | 9° /1° | 0 mm | 2 | |
| Sept. 26 | Sunny | 10° /2° | 0 mm | 3 | |
| Sept. 27 | Patchy rain possible | 6° /2° | 3.7 mm | 1 | |
| Sept. 28 | Moderate rain | 6° /3° | 8.9 mm | 1 | |
| Sept. 29 | Patchy rain possible | 7° /3° | 1.2 mm | 2 | |
| Sept. 30 | Patchy light drizzle | 7° /1° | 4.2 mm | 2 | |
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Juneau City and Borough in September - FAQ
September rainfall patterns in Juneau City and Borough
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Where is Juneau City and Borough?Get accurate weather forecasts for Juneau City and Borough, located at latitude 58.302 and longitude -134.42. Stay updated with localized weather information tailored for Juneau City and Borough.