Weather in Sierra Nevada for September 2025
In general, the average temperature in Sierra Nevada at the beginning of September is 21.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.9 °C by the end of September.
The climate of Sierra Nevada in September is notably wet, with an average of 11 rainy days, and a total of 59.4 mm of precipitation.
Is September a good time to visit Sierra Nevada? check out the best time to travel to Sierra Nevada page.
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Sierra Nevada Weather September
Temperatures trend during September in Sierra Nevada
September weather in Sierra Nevada day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Cloudy | 22° /13° | 0 mm | 5 | |
| 2 Sept. |  Patchy rain possible | 21° /13° | 0.1 mm | 5 | |
| 3 Sept. |  Sunny | 22° /12° | 0 mm | 6 | |
| 4 Sept. | Sunny | 20° /10° | 0 mm | 6 | |
| 5 Sept. | Sunny | 20° /11° | 0 mm | 6 | |
| 6 Sept. | Sunny | 21° /9° | 0 mm | 6 | |
| 7 Sept. |  Moderate or heavy rain shower | 22° /14° | 9.9 mm | 5 | |
| 8 Sept. |  Heavy rain at times | 19° /12° | 11.9 mm | 4 | |
| 9 Sept. | Sunny | 20° /11° | 0 mm | 6 | |
| 10 Sept. | Sunny | 19° /10° | 0 mm | 5 | |
| 11 Sept. | Patchy rain possible | 18° /10° | 0.1 mm | 4 | |
| 12 Sept. | Sunny | 19° /10° | 0 mm | 5 | |
| 13 Sept. |  Overcast | 19° /11° | 0.5 mm | 4 | |
| 14 Sept. | Heavy rain at times | 17° /11° | 4.6 mm | 4 | |
| 15 Sept. | Patchy rain possible | 19° /12° | 0.1 mm | 4 | |
| 16 Sept. | Heavy rain at times | 20° /13° | 1.4 mm | 5 | |
| 17 Sept. | Heavy rain at times | 16° /10° | 3.1 mm | 4 | |
| 18 Sept. | Heavy rain at times | 15° /10° | 4.9 mm | 4 | |
| 19 Sept. | Moderate rain at times | 14° /9° | 2.9 mm | 3 | |
| 20 Sept. | Moderate or heavy rain shower | 15° /7° | 8.5 mm | 4 | |
| 21 Sept. | Moderate or heavy rain shower | 14° /9° | 9 mm | 3 | |
| 22 Sept. | Patchy rain possible | 16° /7° | 0.1 mm | 4 | |
| 23 Sept. | Sunny | 15° /8° | 0 mm | 5 | |
| 24 Sept. | Patchy rain possible | 15° /7° | 2.3 mm | 4 | |
| 25 Sept. | Sunny | 18° /9° | 0 mm | 5 | |
| 26 Sept. | Sunny | 19° /11° | 0 mm | 5 | |
| 27 Sept. | Cloudy | 17° /9° | 0 mm | 4 | |
| 28 Sept. | Sunny | 15° /6° | 0 mm | 5 | |
| 29 Sept. | Sunny | 18° /10° | 0 mm | 5 | |
| 30 Sept. | Sunny | 23° /12° | 0 mm | 6 | |
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Sierra Nevada in September - FAQ
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
UV exposure in Sierra Nevada during September
Quick links
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.