Juneau
September
Weather in Juneau for September 2025
Your guide to Juneau weather in September - trends and predictions
In general, the average temperature in Juneau 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 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 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
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 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 forecast closer to your planned date for the most up-to-date weather information.
Juneau in September - FAQ
What are the expected maximum and minimum temperatures in Juneau 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 during September?
Significant rainfall exceeding 477.9 mm is expected in Juneau during September, occurring over more than 27 days. Preparing for wet conditions is recommended in your planning.
Is snowfall common in Juneau during September?
Juneau 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 during September?
The average wind speed in Juneau during September is 9 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Juneau
Explore the daily rainfall trends and prepare for Juneaus September weather 💧
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