Juneau City and Borough (Juneau)
September
Weather in Juneau City and Borough for September 2025
Your guide to Juneau City and Borough weather in September - trends and predictions
In general, the average temperature in Juneau City and Borough at the beginning of September is 9.9 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 7.3 °F by the end of September.
Juneau City and Borough experiences an exceptionally high level of rainfall in September, with more than 24 rainy days on average.
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3
Dry days
27
Rainy days
0
Snow days
9°/4°
Temperatures
9 km/h
Avg max wind
91 %
Avg humidity
Juneau City and Borough in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  12° | 2 10° | 3 10° | 4 8° | 5 11° | 6  8° | 7 10° |
| 8  10° | 9 11° | 10  14° | 11 10° | 12  8° | 13  8° | 14 9° |
| 15 7° | 16 8° | 17 8° | 18 7° | 19 9° | 20 8° | 21 8° |
| 22 8° | 23 7° | 24  8° | 25 7° | 26 8° | 27 8° | 28 6° |
| 29 7° | 30 7° |
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Temperatures trend during September in Juneau City and Borough
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Light rain shower | 12° /7° | 9.9 mm | 3 | |
| Sept. 2 | Light rain shower | 10° /5° | 5.8 mm | 3 | |
| Sept. 3 | Light rain shower | 10° /5° | 4.8 mm | 3 | |
| Sept. 4 | Light rain shower | 8° /5° | 14.2 mm | 2 | |
| Sept. 5 | Light rain shower | 11° /5° | 11.9 mm | 3 | |
| Sept. 6 | Light rain | 8° /5° | 12.8 mm | 2 | |
| Sept. 7 | Light rain shower | 10° /5° | 22.1 mm | 3 | |
| Sept. 8 | Heavy rain | 10° /4° | 19.5 mm | 3 | |
| Sept. 9 | Light drizzle | 11° /5° | 0.8 mm | 3 | |
| Sept. 10 | Sunny | 14° /5° | 0.1 mm | 4 | |
| Sept. 11 | Light drizzle | 10° /4° | 2.8 mm | 3 | |
| Sept. 12 | Fog | 8° /5° | 20.6 mm | 2 | |
| Sept. 13 | Moderate rain | 8° /5° | 20.9 mm | 2 | |
| Sept. 14 | Moderate rain | 9° /4° | 43.6 mm | 3 | |
| Sept. 15 | Moderate rain | 7° /3° | 21.7 mm | 2 | |
| Sept. 16 | Light rain | 8° /4° | 14.8 mm | 3 | |
| Sept. 17 | Light rain | 8° /3° | 15.1 mm | 2 | |
| Sept. 18 | Light rain | 7° /4° | 15.5 mm | 2 | |
| Sept. 19 | Mist | 9° /4° | 10.7 mm | 2 | |
| Sept. 20 | Light drizzle | 8° /3° | 5.2 mm | 2 | |
| Sept. 21 | Moderate rain | 8° /4° | 36 mm | 3 | |
| Sept. 22 | Light rain shower | 8° /4° | 27.4 mm | 2 | |
| Sept. 23 | Light rain shower | 7° /3° | 29.3 mm | 2 | |
| Sept. 24 | Overcast | 8° /2° | 11.5 mm | 2 | |
| Sept. 25 | Overcast | 7° /3° | 5.3 mm | 2 | |
| Sept. 26 | Light rain | 8° /3° | 5.2 mm | 2 | |
| Sept. 27 | Light drizzle | 8° /3° | 1.7 mm | 2 | |
| Sept. 28 | Patchy rain possible | 6° /2° | 5.2 mm | 2 | |
| 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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Important Notice
Our weather forecast for Juneau City and Borough in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Juneau City and Borough forecast closer to your planned date for the most up-to-date weather information.
Juneau City and Borough in September - FAQ
What are the expected maximum and minimum temperatures in Juneau City and Borough during September?
Prepare for cooler days with highs just around 9° and colder nights, dipping below 4°.
How much rainfall should be expected in Juneau City and Borough during September?
Significant rainfall exceeding 477.9 mm is expected in Juneau City and Borough during September, occurring over more than 27 days. Preparing for wet conditions is recommended in your planning.
Is snowfall common in Juneau City and Borough during September?
Juneau City and Borough experiences an average snowfall of 0 cm during September, occurring over 0 days, which may interest winter sports enthusiasts.
What are the typical wind conditions in Juneau City and Borough during September?
The average wind speed in Juneau City and Borough during September is 9 km/h, suggesting breezy to windy conditions, depending on your activities.
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.
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