Yosemite National Park
California, USA
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Yosemite National Park, CA

Part of Merced River in the valley below the Yosemite National Park Mountains, California, with clear blue skies
Part of Merced River in the valley below the Yosemite National Park Mountains, California, with clear blue skies
August is a hot summer month with average high temperatures of 89°F (31.7°C) and the average low temperatures of 52°F (11.1°C). Yosemite summers are dry with long days (up to 15 hours of daylight) and characterized by thunderstorms and lightning.
The deep canyons carved by the Tuolumne and Merced Rivers provide many exciting adventures - but be careful to avoid the blistering midday heat. Start by early dawn for enjoying the subalpine slopes and alpine forests that experience a significant temperature differential compared to the valley below.

What is the temperature in August in Yosemite National Park?

In Yosemite National Park, in August, the average high-temperature is 89.4°F (31.9°C), and the average low-temperature is 52°F (11.1°C).

How much does it rain in Yosemite National Park in August?

In Yosemite National Park, California, in August, during 1 rainfall days, 0.2" (5.1mm) of precipitation is typically accumulated.

What is the driest month in Yosemite National Park?

The month with the least rainfall in Yosemite National Park, California, is August when the rain falls for 1 days and typically collects 0.2" (5.1mm) of precipitation.

When it does not snow in Yosemite National Park?

In Yosemite National Park, California, snow does not fall in June through September.

How many hours of daylight does Yosemite National Park have in August?

The average length of the day in August in Yosemite National Park is 13.6h.

How many hours of sunshine does Yosemite National Park have in August?

In Yosemite National Park, California, the average sunshine in August is 11h.

How high is the UV index in August in Yosemite National Park?

In August, the average daily maximum UV index is 10. A UV Index estimate of 8 to 10 represents a very high health risk from the exposure to the Sun's UV rays.
Average temperature in August - Yosemite National Park, CA
  • Average high temperature in August: 89.5°F

The warmest month (with the highest average high temperature) is July (89.9°F).
The month with the lowest average high temperature is January (47.2°F).

  • Average low temperature in August: 52°F

The month with the highest average low temperature is July (53.2°F).
The coldest month (with the lowest average low temperature) is January (25.6°F).

Average rainfall in August - Yosemite National Park, CA
  • Average rainfall in August: 0.2"

The wettest month (with the highest rainfall) is January (6.5").
The driest month (with the lowest rainfall) is August (0.2").

Average rainfall days in August - Yosemite National Park, CA
  • Average rainfall days in August: 1 days

The month with the highest number of rainy days is March (10 days).
Months with the lowest number of rainy days are July and August (1 days).

Average snowfall in August - Yosemite National Park, CA
  • Average snowfall in August: 0"

The month with the highest snowfall is January (16.2").
Months with the lowest snowfall are June, July, August and September (0").

Average daylight in August / Average sunshine in August - Yosemite National Park, CA
  • Average daylight in August: 13.6h

The month with the longest days is June (Average daylight: 14.8h).
The month with shortest days is December (Average daylight: 9.6h).

  • Average sunshine in August: 11h

The month with most sunshine is July (Average sunshine: 12h).
Months with least sunshine are January and December (Average sunshine: 6).

Average UV index in August - Yosemite National Park, CA
  • Average UV index in August: 10

The month with the highest UV index is July (UV index 11).
Months with the lowest UV index are January and December (UV index 2).