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Yosemite Valley (CA)
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Yosemite Valley (CA)
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United States weather

Weather in Yosemite Valley, California for September 2026

Your guide to Yosemite Valley weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in Yosemite Valley at the beginning of September is 23 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.7 °C by the end of September.

    • Rain 🌧️

  • With an average of 5 rainy days, Yosemite Valley experiences minimal rainfall in September.

    • More

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

Average dry days
25
Dry days
Average rainy days
5
Rainy days
Average snowy days
0
Snow days
Average temperatures
18°/12°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
45 %
Avg humidity

Yosemite Valley Weather September

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

Temperatures trend during September in Yosemite Valley

See the weather trend as well as the moving average line

September weather in Yosemite Valley day by day

Click on a date for more information
August October
Date Weather Temperatures Rain Snow More
Sept. 1 Sunny
Sunny
 24° /16° 0 mm 0 cm
Sept. 2 Sunny
Sunny
 22° /15° 0 mm 0 cm
Sept. 3 Sunny
Sunny
 22° /14° 0 mm 0 cm
Sept. 4 Sunny
Sunny
 24° /15° 0 mm 0 cm
Sept. 5 Sunny
Sunny
 24° /16° 0 mm 0 cm
Sept. 6 Sunny
Sunny
 23° /15° 0 mm 0 cm
Sept. 7 Sunny
Sunny
 22° /13° 0 mm 0 cm
Sept. 8 Sunny
Sunny
 21° /12° 0 mm 0 cm
Sept. 9 Sunny
Sunny
 17° /10° 0 mm 0 cm
Sept. 10 Cloudy
Cloudy
 15° /9° 0 mm 0 cm
Sept. 11 Sunny
Sunny
 15° /6° 0 mm 0 cm
Sept. 12 Sunny
Sunny
 16° /8° 1.6 mm 0 cm
Sept. 13 Sunny
Sunny
 19° /9° 0 mm 0 cm
Sept. 14 Partly cloudy
Partly cloudy
 20° /10° 0 mm 0 cm
Sept. 15 Sunny
Sunny
 19° /10° 0 mm 0 cm
Sept. 16 Moderate or heavy snow showers
Moderate or heavy snow showers
 14° /8° 0.9 mm 0.1 cm
Sept. 17 Partly cloudy
Partly cloudy
 15° /8° 0 mm 0 cm
Sept. 18 Thundery outbreaks possible
Thundery outbreaks possible
 13° /10° 0 mm 0 cm
Sept. 19 Torrential rain shower
Torrential rain shower
 11° /8° 24.9 mm 0 cm
Sept. 20 Sunny
Sunny
 16° /8° 0 mm 0 cm
Sept. 21 Sunny
Sunny
 16° /11° 0 mm 0 cm
Sept. 22 Sunny
Sunny
 19° /11° 0 mm 0 cm
Sept. 23 Sunny
Sunny
 21° /13° 0 mm 0 cm
Sept. 24 Cloudy
Cloudy
 20° /13° 0 mm 0 cm
Sept. 25 Sunny
Sunny
 18° /13° 3.7 mm 0 cm
Sept. 26 Sunny
Sunny
 20° /11° 0 mm 0 cm
Sept. 27 Sunny
Sunny
 20° /13° 2.4 mm 0 cm
Sept. 28 Sunny
Sunny
 18° /13° 0 mm 0 cm
Sept. 29 Sunny
Sunny
 18° /11° 0 mm 0 cm
Sept. 30 Partly cloudy
Partly cloudy
 17° /10° 0 mm 0 cm
Next
Important Notice
Our weather forecast for Yosemite Valley 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 Yosemite Valley forecast closer to your planned date for the most up-to-date weather information.
Change Month
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Yosemite Valley in September - FAQ

What are the expected maximum and minimum temperatures in Yosemite Valley during September?

Enjoy moderate daytime temperatures of up to 18° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Yosemite Valley during September?

In September, Yosemite Valley can expect light to moderate rainfall, totaling 33.5 mm across approximately 5 days. Occasional showers are possible, and planning ahead for them could be helpful.

Will it snow in Yosemite Valley in September 2026?

Yosemite Valley typically sees 0.095 cm of snowfall during September.

What are the typical wind conditions in Yosemite Valley during September?

The average wind speed in Yosemite Valley during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.

Yosemite Valley snow forecast September 2026

Track daily snowfall levels and discover Yosemite Valley’s snowy potential this September ❄️

September rainfall patterns in Yosemite Valley

Explore the daily rainfall trends and prepare for Yosemite Valleys September weather 💧
Typically, Yosemite Valley has 5 rainy days in September with a total of 33.5 mm of rainfall.

UV exposure in Yosemite Valley during September

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

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Location coordinates Where is Yosemite Valley?

Get accurate weather forecasts for Yosemite Valley, located at latitude 37.741 and longitude -119.578. Stay updated with localized weather information tailored for Yosemite Valley.

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