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Kenai Peninsula Borough (Seward)
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United States weather

Weather in Kenai Peninsula Borough, Alaska for September 2025

Your guide to Kenai Peninsula Borough weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Kenai Peninsula Borough has been nearly identical to the historical average, with a temperature of 11.7 °F (showing only a slight deviation of -0.1 °F).

  • Expect cooler weather in the next days in Kenai Peninsula Borough with the forecast suggesting a temperature of 10.4 °F, lower than the historical average.

  • In general, the average temperature in Kenai Peninsula Borough at the beginning of September is 12.6 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 8.6 °F by the end of September.

    • Rain 🌧️

  • Kenai Peninsula Borough experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 397.3 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
8
Dry days
Average rainy days
22
Rainy days
Average snowy days
0
Snow days
Average temperatures
10°/6°
Temperatures
Average wind speed
13 km/h
Avg max wind
Average humidity
85 %
Avg humidity

Kenai Peninsula Borough Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Moderate rain at times
12°
2
Moderate rain at times
14°
3
Heavy rain at times
13°
4
Moderate or heavy rain shower
12°
5
Moderate or heavy rain shower
13°
6
Moderate or heavy rain shower
12°
7
Patchy rain possible
12°
8
Moderate rain at times
11°
9
Moderate or heavy rain shower
10°
10
Moderate rain at times
11°
11
Moderate or heavy rain shower
10°
12
Heavy rain at times
10°
13
Moderate rain
11°
14
Patchy rain possible
11°
15
Heavy rain
10°
16
Heavy rain
13°
17
Moderate rain
9°
18
Patchy rain possible
11°
19
Moderate rain
9°
20
Patchy rain possible
9°
21
Partly cloudy
12°
22
Patchy rain possible
10°
23
Patchy rain possible
11°
24
Cloudy
11°
25
Patchy rain possible
11°
26
Patchy rain possible
7°
27
Sunny
9°
28
Moderate rain at times
6°
29
Light rain
7°
30
Cloudy
9°

Temperatures trend during September in Kenai Peninsula Borough

See the weather trend as well as the moving average line

September weather in Kenai Peninsula Borough day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Moderate rain at times
Moderate rain at times
 12° /6° 2.1 mm 3
Sept. 2 Moderate rain at times
Moderate rain at times
 14° /8° 1.8 mm 4
Sept. 3 Heavy rain at times
Heavy rain at times
 13° /8° 5.6 mm 3
Sept. 4 Moderate or heavy rain shower
Moderate or heavy rain shower
 12° /8° 22.3 mm 3
Sept. 5 Moderate or heavy rain shower
Moderate or heavy rain shower
 13° /8° 44.9 mm 3
Sept. 6 Moderate or heavy rain shower
Moderate or heavy rain shower
 12° /9° 19.4 mm 3
Sept. 7 Patchy rain possible
Patchy rain possible
 12° /7° 18.7 mm 3
Sept. 8 Moderate rain at times
Moderate rain at times
 11° /6° 3.3 mm 3
Sept. 9 Moderate or heavy rain shower
Moderate or heavy rain shower
 10° /7° 22.2 mm 3
Sept. 10 Moderate rain at times
Moderate rain at times
 11° /7° 24.9 mm 3
Sept. 11 Moderate or heavy rain shower
Moderate or heavy rain shower
 10° /7° 23.3 mm 3
Sept. 12 Heavy rain at times
Heavy rain at times
 10° /6° 24.8 mm 3
Sept. 13 Moderate rain
Moderate rain
 11° /4° 7.8 mm 0.4
Sept. 14 Patchy rain possible
Patchy rain possible
 11° /2° 1.1 mm 0.4
Sept. 15 Heavy rain
Heavy rain
 10° /4° 25.7 mm 0.1
Sept. 16 Heavy rain
Heavy rain
 13° /5° 53.3 mm 0.4
Sept. 17 Moderate rain
Moderate rain
 9° /7° 13.1 mm 0
Sept. 18 Patchy rain possible
Patchy rain possible
 11° /9° 3.4 mm 2
Sept. 19 Moderate rain
Moderate rain
 9° /8° 7.5 mm 2
Sept. 20 Patchy rain possible
Patchy rain possible
 9° /8° 3.8 mm 2
Sept. 21 Partly cloudy
Partly cloudy
 12° /7° 0.1 mm 3
Sept. 22 Patchy rain possible
Patchy rain possible
 10° /8° 0.6 mm 2
Sept. 23 Patchy rain possible
Patchy rain possible
 11° /7° 0.1 mm 2
Sept. 24 Cloudy
Cloudy
 11° /3° 0.1 mm 2
Sept. 25 Patchy rain possible
Patchy rain possible
 11° /2° 0.8 mm 2
Sept. 26 Patchy rain possible
Patchy rain possible
 7° /2° 1.1 mm 1
Sept. 27 Sunny
Sunny
 9° /1° 0 mm 3
Sept. 28 Moderate rain at times
Moderate rain at times
 6° /4° 5.9 mm 2
Sept. 29 Light rain
Light rain
 7° /5° 8.2 mm 2
Sept. 30 Cloudy
Cloudy
 9° /1° 0.1 mm 2
Next
Important Notice
Our weather forecast for Kenai Peninsula 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 Kenai Peninsula Borough forecast closer to your planned date for the most up-to-date weather information.
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Kenai Peninsula Borough in September - FAQ

What are the expected maximum and minimum temperatures in Kenai Peninsula Borough during September?
During September, expect a variety of temperatures with highs around 10° and lows near 6°, suitable for diverse activities and preferences.
How much rainfall should be expected in Kenai Peninsula Borough during September?
Significant rainfall exceeding 397.3 mm is expected in Kenai Peninsula Borough during September, occurring over more than 22 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Kenai Peninsula Borough during September?
The average wind speed in Kenai Peninsula Borough during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Kenai Peninsula Borough

Explore the daily rainfall trends and prepare for Kenai Peninsula Boroughs September weather 💧
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Location coordinates Where is Kenai Peninsula Borough?

Get accurate weather forecasts for Kenai Peninsula Borough, located at latitude 60.104 and longitude -149.444. Stay updated with localized weather information tailored for Kenai Peninsula Borough.

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