Temperatures in September

It's warm in September in Yosemite National Park with an average temperature of 25°C. Temperatures this month range from a low of 21°C to a high of 29°C. At night, you can expect temperatures between 2°C and 9°C.

Max and Min Temperatures per Day

Daily Temperature in September in Yosemite National Park

This chart shows the daily maximum and minimum temperatures in degrees Celsius for Yosemite National Park in September. The red line indicates the max temperatures, and the blue line shows the minimums.

Start of September

The month of September starts in Yosemite National Park with hot temperatures, averaging around 28°C during the day and nights close to 7°C. There’s little chance of precipitation. The weather is mostly sunny and dry.

Mid-September

By mid-September, the average daytime temperature drops to around 25°C, with nights close to 6°C. Not much precipitation expected during this period. It’s mostly dry with sunshine.

End of September

By the end of September, the average daytime temperature in Yosemite National Park will be around 24°C, with nights close to 4°C. Barely any chance of precipitation. The weather will mostly be dry with lots of sunshine.

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Precipitation in September

In September, there is an average of 11 mm of precipitation, spread over 2 days. Of the total precipitation, about 0,1 cm falls as snow in September. The wind speed is around 3 Bft, mostly coming from the South.

The average chance of precipitation is only 8% in September.

Precipitation Chance

This chart shows the daily precipitation chance (in percentages) in September for Yosemite National Park. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.

Yosemite National Park in September		UK
Average Temperature	25°C	20°C
High Temp	29°C	22°C
Low Temp	21°C	17°C
Total Precipitation	11 mm	44 mm
Rainy Days	2 days	8 days
Total Snowfall	0,1 cm	0 cm
Snowy Days	1 day	0 days

August

October

UV index

The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.

Is September a good time to visit Yosemite National Park?

Want nice weather? Then September is a great time to be in Yosemite National Park. You’ll have pleasant temperatures and little chance of rain this month.

Temperature records for Yosemite National Park in September

With 35°C, Yosemite National Park hit the highest temperature in the last 10 years in September 2022. The lowest daytime temperature in this month was 9°C in 2017. The extreme night temperatures ranged from a low of -4°C to a high of 14°C.

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August

October

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Daily Temperature in September in Yosemite National Park

This chart shows the average daily temperatures, both day and night, for each day in September in Yosemite National Park, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.

Daily Precipitation in September in Yosemite National Park

The chart below shows the average daily precipitation in September for Yosemite National Park, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.

A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 2 days of rain in Yosemite National Park.

Daily Precipitation in September in Yosemite National Park

Daily Snowfall in September in Yosemite National Park

This chart shows the average daily snowfall in September in Yosemite National Park, measured in centimetres. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in September.

Daily UV Index in September in Yosemite National Park

This chart shows the average daily UV index in September in Yosemite National Park, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.

Temperature in September in Yosemite National Park Over the Years

This chart shows the average temperature in September in Yosemite National Park, measured in degrees Celsius, over the past years.

Total Precipitation in September in Yosemite National Park Over the Years

This chart shows the average precipitation in September in Yosemite National Park, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.

Snowfall in September in Yosemite National Park per year

This chart shows the average snowfall in September in Yosemite National Park, measured in centimetres, over the past years.

Snowfall in September in Yosemite National Park over the past years

August

October

Daily climate in September for Yosemite National Park

Click on a specific day in September for detailed info on the typical weather on that day in Yosemite National Park. Check out the historical temperatures and precipitation over the past 10 years on this day.

Average Weather in Yosemite National Park by Month

Click on a month below to see detailed weather info for Yosemite National Park. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.