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Weather in Sierra Nevada for September 2026

Your guide to Sierra Nevada weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in Sierra Nevada at the beginning of September is 23.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.3 °C by the end of September.

    • Rain 🌧️

  • Sierra Nevada experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 35.4 mm.

    • More

  • Is September a good time to visit Sierra Nevada? check out the best time to travel to Sierra Nevada page.

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

Average dry days
23
Dry days
Average rainy days
7
Rainy days
Average snowy days
0
Snow days
Average temperatures
21°/12°
Temperatures
Average wind speed
9 km/h
Avg max wind
Average humidity
47 %
Avg humidity

Sierra Nevada Weather September

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

Temperatures trend during September in Sierra Nevada

See the weather trend as well as the moving average line

September weather in Sierra Nevada day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Cloudy
Cloudy
 22° /13° 0 mm 6
2 Sept. Patchy rain possible
Patchy rain possible
 23° /11° 0.1 mm 6
3 Sept. Sunny
Sunny
 24° /12° 0 mm 7
4 Sept. Sunny
Sunny
 24° /12° 0 mm 7
5 Sept. Sunny
Sunny
 24° /13° 0.2 mm 6
6 Sept. Sunny
Sunny
 24° /12° 0 mm 6
7 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 25° /15° 5.2 mm 6
8 Sept. Heavy rain at times
Heavy rain at times
 22° /13° 5.9 mm 5
9 Sept. Sunny
Sunny
 21° /12° 0.4 mm 6
10 Sept. Sunny
Sunny
 21° /11° 0 mm 6
11 Sept. Patchy rain possible
Patchy rain possible
 21° /11° 0.1 mm 5
12 Sept. Sunny
Sunny
 22° /12° 0 mm 6
13 Sept. Overcast
Overcast
 23° /13° 0.2 mm 5
14 Sept. Heavy rain at times
Heavy rain at times
 22° /13° 2.3 mm 6
15 Sept. Patchy rain possible
Patchy rain possible
 23° /13° 0.1 mm 6
16 Sept. Heavy rain at times
Heavy rain at times
 24° /14° 0.7 mm 6
17 Sept. Heavy rain at times
Heavy rain at times
 22° /13° 1.5 mm 6
18 Sept. Heavy rain at times
Heavy rain at times
 22° /13° 2.5 mm 5
19 Sept. Moderate rain at times
Moderate rain at times
 20° /12° 1.5 mm 5
20 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 20° /11° 4.4 mm 6
21 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 19° /12° 4.9 mm 4
22 Sept. Patchy rain possible
Patchy rain possible
 19° /9° 0.1 mm 5
23 Sept. Sunny
Sunny
 17° /8° 0 mm 5
24 Sept. Patchy rain possible
Patchy rain possible
 17° /7° 1.1 mm 5
25 Sept. Sunny
Sunny
 17° /9° 1.7 mm 5
26 Sept. Sunny
Sunny
 19° /10° 0.6 mm 5
27 Sept. Cloudy
Cloudy
 19° /10° 0 mm 5
28 Sept. Sunny
Sunny
 18° /9° 0 mm 6
29 Sept. Sunny
Sunny
 17° /9° 1.2 mm 5
30 Sept. Sunny
Sunny
 21° /11° 0.7 mm 5
Next
Important Notice
Our weather forecast for Sierra Nevada 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 Sierra Nevada forecast closer to your planned date for the most up-to-date weather information.
Change Month
‹
›

Sierra Nevada weather in September vs August vs October

Compare September weather in Sierra Nevada with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
AugustSeptemberOctober
WeatherSunny
Sunny
Sunny
Sunny
Patchy rain possible
Patchy rain possible
Temperatures26°/16°21°/12°16°/9°
Rainfall37 mm35 mm84 mm
Wind11.1 km/h8.7 km/h9.8 km/h
Humidity36%47%62%
Rainy days6 days7 days15 days
Dry days26 days23 days16 days

Planning a trip to Sierra Nevada? Discover the best time to visit

Sierra Nevada in September - FAQ

What are the expected maximum and minimum temperatures in Sierra Nevada during September?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Sierra Nevada during September?
In September, Sierra Nevada can expect light to moderate rainfall, totaling 35.4 mm across approximately 7 days. Occasional showers are possible, and planning ahead for them could be helpful.

What are the typical wind conditions in Sierra Nevada during September?
The average wind speed in Sierra Nevada during September is 9 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Sierra Nevada

Explore the daily rainfall trends and prepare for Sierra Nevadas September weather 💧
Typically, Sierra Nevada has 7 rainy days in September with a total of 35.4 mm of rainfall.

UV exposure in Sierra Nevada during September

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

What to pack to Sierra Nevada in September?

⛅ Mild & changeable · highs around 21 °C, occasional showers

As you prepare for your trip to Sierra Nevada in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Sierra Nevada, during September, is comfortable and enjoyable, regardless of the weather conditions.

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Location coordinates Where is Sierra Nevada?

Get accurate weather forecasts for Sierra Nevada, located at latitude 37.095 and longitude -3.397. Stay updated with localized weather information tailored for Sierra Nevada.

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