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Weather in Walnut Grove for September 2026

Your guide to Walnut Grove weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Walnut Grove is slightly cooler than the historical average by 0.7 °C.

  • Expect cooler weather in the next days in Walnut Grove with the forecast suggesting a temperature of 21.6 °C, lower than the historical average.

  • In general, the average temperature in Walnut Grove at the beginning of September is 24.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.3 °C by the end of September.

    • Rain 🌧️

  • The climate of Walnut Grove in September is notably wet, with an average of 14 rainy days, and a total of 173.9 mm of precipitation.

    • More

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

Average dry days
16
Dry days
Average rainy days
14
Rainy days
Average snowy days
0
Snow days
Average temperatures
19°/11°
Temperatures
Average wind speed
8 km/h
Avg max wind
Average humidity
79 %
Avg humidity

Walnut Grove Weather September

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

Temperatures trend during September in Walnut Grove

See the weather trend as well as the moving average line

September weather in Walnut Grove day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 25° /13° 0 mm 6
2 Sept. Partly cloudy
Partly cloudy
 25° /14° 0.7 mm 5
3 Sept. Light rain shower
Light rain shower
 23° /13° 0.6 mm 5
4 Sept. Fog
Fog
 23° /12° 0.1 mm 5
5 Sept. Sunny
Sunny
 27° /14° 0 mm 7
6 Sept. Sunny
Sunny
 26° /13° 0 mm 6
7 Sept. Partly cloudy
Partly cloudy
 23° /12° 7 mm 5
8 Sept. Sunny
Sunny
 22° /12° 0 mm 5
9 Sept. Cloudy
Cloudy
 22° /12° 0 mm 4
10 Sept. Patchy rain possible
Patchy rain possible
 21° /12° 0 mm 5
11 Sept. Light drizzle
Light drizzle
 18° /11° 0.1 mm 3
12 Sept. Overcast
Overcast
 23° /11° 0 mm 3.9
13 Sept. Patchy rain possible
Patchy rain possible
 16° /11° 0.9 mm 2.8
14 Sept. Patchy rain possible
Patchy rain possible
 17° /11° 1 mm 3.1
15 Sept. Sunny
Sunny
 19° /10° 0 mm 5
16 Sept. Smoky haze
Smoky haze
 22° /10° 0 mm 6
17 Sept. Sunny
Sunny
 24° /11° 0 mm 6
18 Sept. Sunny
Sunny
 27° /13° 0 mm 7
19 Sept. Overcast
Overcast
 25° /15° 0 mm 6
20 Sept. Sunny
Sunny
 21° /13° 0 mm 6
21 Sept. Overcast
Overcast
 21° /11° 0 mm 5
22 Sept. Sunny
Sunny
 23° /12° 0 mm 6
23 Sept. Sunny
Sunny
 24° /13° 0 mm 6
24 Sept. Sunny
Sunny
 17° /12° 0 mm 5
25 Sept. Sunny
Sunny
 24° /10° 0 mm 6
26 Sept. Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
 13° /8° 23 mm 3
27 Sept. Light drizzle
Light drizzle
 14° /10° 12.6 mm 3
28 Sept. Overcast
Overcast
 15° /9° 7.2 mm 4
29 Sept. Partly cloudy
Partly cloudy
 14° /8° 40.4 mm 4
30 Sept. Cloudy
Cloudy
 17° /6° 7 mm 4
Next
Important Notice
Our weather forecast for Walnut Grove 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 Walnut Grove forecast closer to your planned date for the most up-to-date weather information.
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Walnut Grove in September - FAQ

What are the expected maximum and minimum temperatures in Walnut Grove during September?
Enjoy moderate daytime temperatures of up to 19° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Walnut Grove during September?
Significant rainfall exceeding 173.9 mm is expected in Walnut Grove during September, occurring over more than 14 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Walnut Grove during September?
The average wind speed in Walnut Grove during September is 8 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Walnut Grove

Explore the daily rainfall trends and prepare for Walnut Groves September weather 💧
Typically, Walnut Grove has 14 rainy days in September with a total of 173.9 mm of rainfall.

UV exposure in Walnut Grove during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Walnut Grove?

Get accurate weather forecasts for Walnut Grove, located at latitude 49.165 and longitude -122.64. Stay updated with localized weather information tailored for Walnut Grove.

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