August weather forecast and climate
Mount Shasta, CA

The Lake Siskiyou on the base of Mount Shasta in California, and a view of the planted forest, the far suspension bridge, and snowy mountain peak
The Lake Siskiyou on the base of Mount Shasta in California, and a view of the planted forest, the far suspension bridge, and snowy mountain peak

Weather in August

August, the last month of the summer, in Mount Shasta, is also a moderately hot month, with average temperature varying between 83.5°F (28.6°C) and 51.8°F (11°C).

Temperature

In August, the average high-temperature is relatively the same as in July - a still warm 83.5°F (28.6°C). In August, in Mount Shasta, California, the average low-temperature is 51.8°F (11°C).

Heat index

In August, the average heat index is calculated to 83.5°F (28.6°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'real feel', or 'felt air temperature', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (clothing, pregnancy, wind). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

August is the least humid month in Mount Shasta, with an average relative humidity of 45%.

Rainfall

In August, the rain falls for 2.3 days. Throughout August, 0.24" (6mm) of precipitation is accumulated. Throughout the year, in Mount Shasta, there are 90.7 rainfall days, and 26.38" (670mm) of precipitation is accumulated.

Snowfall

June through August are months without snowfall.

Daylight

The average length of the day in Mount Shasta is 13.8h.

Sunshine

In Mount Shasta, the average sunshine in August is 12h.

UV index

In August, the average daily maximum UV index in Mount Shasta is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in August in Mount Shasta?

In August, in Mount Shasta, California, the average high-temperature is 83.5°F (28.6°C), and the average low-temperature is 51.8°F (11°C). In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), that takes the relative humidity and factores it into the air temperature reading, is calculated to 83.5°F (28.6°C).

What is the least humid month in Mount Shasta?

With an average relative humidity of 45%, August is the least humid month in Mount Shasta.

What is the average humidity in August in Mount Shasta?

In August, the average relative humidity is 45%.

How much does it rain in Mount Shasta in August?

In Mount Shasta, California, during August, the rain falls for 2.3 days and regularly aggregates up to 0.24" (6mm) of precipitation.

Does it snow in Mount Shasta in August?

In Mount Shasta, California, in August, it doesn't snow. In September, it regularly snows.

When it does not snow in Mount Shasta?

In Mount Shasta, California, snow does not fall in June through August.

What is the average length of the day in August in Mount Shasta?

In Mount Shasta, the average length of the day in August is 13.8h.

How many hours of sunshine does Mount Shasta have in August?

In August, the average sunshine is 12h.

How high is the UV index in August in Mount Shasta?

In Mount Shasta, California, the average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a medium health risk from the exposure to the Sun's UV radiation.

Average temperature in August
Mount Shasta, CA

Average temperature in August - Mount Shasta, CA
  • Average high temperature in August: 83.5°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is December (40.8°F).

  • Average low temperature in August: 51.8°F

The month with the highest average low temperature is July (52.2°F).
The coldest month (with the lowest average low temperature) is December (27.1°F).

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Average pressure in August
Mount Shasta, CA

Average pressure in August - Mount Shasta, CA
  • Average pressure in August: 29.94"

The month with the highest atmospheric pressure is January (30.17").
Months with the lowest atmospheric pressure are June and August (29.94").

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Average wind speed in August
Mount Shasta, CA

Average wind speed in August - Mount Shasta, CA
  • Average wind speed in August: 3.9mph

The windiest month (with the highest average wind speed) is March (5.8mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).

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Average humidity in August
Mount Shasta, CA

Average humidity in August - Mount Shasta, CA
  • Average humidity in August: 45%

The month with the highest relative humidity is March (81%).
The month with the lowest relative humidity is August (45%).

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Average rainfall in August
Mount Shasta, CA

Average rainfall in August - Mount Shasta, CA
  • Average rainfall in August: 0.24"

The wettest month (with the highest rainfall) is March (4.69").
The driest month (with the least rainfall) is July (0.16").

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Average rainfall days in August
Mount Shasta, CA

Average rainfall days in August - Mount Shasta, CA
  • Average rainfall days in August: 2.3 days

The month with the highest number of rainy days is March (12.3 days).
The month with the least rainy days is August (2.3 days).

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Average snowfall in August
Mount Shasta, CA

Average snowfall in August - Mount Shasta, CA
  • Average snowfall in August: 0"

The month with the highest snowfall is January (19.21").
Months with the least snowfall are June, July and August (0").

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Average snowfall days in August
Mount Shasta, CA

Average snowfall days in August - Mount Shasta, CA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is December (10.9 days).
Months with the least snowfall days are July and August (0 days).

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Average daylight in August /
Average sunshine in August
Mount Shasta, CA

Average daylight in August / Average sunshine in August - Mount Shasta, CA
  • Average daylight in August: 13.8h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in August: 12h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 5.4h).

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Average sunshine days in August
Mount Shasta, CA

Average sunshine days in August - Mount Shasta, CA
  • Average sunshine days in August: 25.7 days

Months with the most sunshine days are July and August (25.7 days).
The month with the least sunshine days is March (12.3 days).

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Average UV index in August
Mount Shasta, CA

Average UV index in August - Mount Shasta, CA
  • Average UV index in August: 5

Months with the highest UV index are June and July (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in August
Mount Shasta, CA

Average cloud cover in August - Mount Shasta, CA
  • Average cloud cover in August: 6

The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 6).

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Average visibility in August
Mount Shasta, CA

Average visibility in August - Mount Shasta, CA
  • Average visibility in August: 6mi

Months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
Months with the lowest visibility are January, February, March and December (5mi).

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