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Weather in Sierra Nevada for September 2025

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

    Official Weather Alert ⚠️

  • Yellow High Temperature Warning - See hour by hour.

    • Temperatures

  • So far, September 2025 in Sierra Nevada shows a warmer trend than usual by 2.2 °C.

  • The forecast for the upcoming days in Sierra Nevada predicts a temperature of 23.8 °C, which is slightly above the historical average.

  • In general, the average temperature in Sierra Nevada at the beginning of September is 23.7 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 20.9 °C by the end of September.

    • Rain 🌧️

  • Sierra Nevada experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 59.4 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
20
Dry days
Average rainy days
10
Rainy days
Average snowy days
0
Snow days
Average temperatures
18°/10°
Temperatures
Average wind speed
9 km/h
Avg max wind
Average humidity
51 %
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
19°
16
Weather Alert Sunny
28°
17
Weather Alert Sunny
28°
18
Sunny
28°
19
Sunny
27°
20
Patchy rain possible
25°
21
Patchy rain possible
22°
22
Patchy rain possible
23°
23
Sunny
24°
24
Partly cloudy
23°
25
Patchy rain possible
20°
26
Patchy rain possible
19°
27
Partly cloudy
20°
28
Sunny
23°
29
Sunny
18°
30
Sunny
23°

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
 19° /12° 0.1 mm 4
16 Sept. Sunny
Sunny
 28° /17° 0 mm 1.9
17 Sept. Sunny
Sunny
 28° /17° 0 mm 1.7
18 Sept. Sunny
Sunny
 28° /18° 0 mm 1.7
19 Sept. Sunny
Sunny
 27° /18° 0 mm 1.6
20 Sept. Patchy rain possible
Patchy rain possible
 25° /15° 0.5 mm 4
21 Sept. Patchy rain possible
Patchy rain possible
 22° /16° 1.5 mm 4
22 Sept. Patchy rain possible
Patchy rain possible
 23° /15° 0.2 mm 4
23 Sept. Sunny
Sunny
 24° /16° 0 mm 5
24 Sept. Partly cloudy
Partly cloudy
 23° /15° 0 mm 5
25 Sept. Patchy rain possible
Patchy rain possible
 20° /13° 1.3 mm 4
26 Sept. Patchy rain possible
Patchy rain possible
 19° /12° 0.9 mm 4
27 Sept. Partly cloudy
Partly cloudy
 20° /12° 0.1 mm 5
28 Sept. Sunny
Sunny
 23° /13° 0 mm 5
29 Sept. Sunny
Sunny
 18° /10° 0 mm 5
30 Sept. Sunny
Sunny
 23° /12° 0 mm 6
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
WeatherPatchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Temperatures25°/15°18°/10°13°/7°
Rainfall71 mm59 mm105 mm
Wind10.6 km/h9 km/h11.6 km/h
Humidity39%51%64%
Rainy days11 days10 days18 days
Dry days20 days20 days13 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 18° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Sierra Nevada during September?
Moderate rainfall is anticipated in Sierra Nevada during September, with a total of 59.4 mm spread over approximately 10 days. Considering plans for rainy days is advisable.
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.

What to pack to Sierra Nevada in September?

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.

  • Clothing
    • Warm Clothing: Sweaters, hoodies, long pants
    • Rain Gear: Lightweight, waterproof clothing
  • Footwear
    • Waterproof Shoes
  • Accessories
    • Scarves: To protect you from the cold wind
    • Gloves/Mittens: Essential for cold weather
    • Warm Hats: Warm hats for insulation in cold weather
    • Umbrellas/Raincoats: For rainy days

September rainfall patterns in Sierra Nevada

Explore the daily rainfall trends and prepare for Sierra Nevadas September weather 💧

UV exposure in Sierra Nevada during September

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

Quick links

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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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