August weather forecast
Mount Shasta, CA

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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 another warm month, with an average temperature fluctuating between 51.8°F (11°C) and 83.5°F (28.6°C).

Temperature

Mount Shasta transitions into August recording an average high-temperature of a still moderately hot 83.5°F (28.6°C), closely aligning with the preceding month's temperature. Mount Shasta's nighttime temperatures in August reflect a stark contrast to the day's highs, falling to an average low of 51.8°F (11°C).

Heat index

During August, the heat index is estimated at 84.2°F (29°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Observations indicate that the heat index values are for shady locations with light wind. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold great significance to children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.

Humidity

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

Rainfall

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

Snowfall

June through August are months without snowfall.

Daylight

In August, the average length of the day in Mount Shasta is 13h and 47min.
On the first day of the month, sunrise is at 6:05 am and sunset at 8:25 pm. On the last day of August, in Mount Shasta, sunrise is at 6:35 am and sunset at 7:43 pm PDT.

Sunshine

The average sunshine in August in Mount Shasta is 12h.

UV index

In Mount Shasta, the average daily maximum UV index in August is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum high UV index of 5 in August translates into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
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Frequently asked questions

Is it hot in Mount Shasta during August?

Mount Shasta in August has an average high-temperature of 83.5°F (28.6°C) and an average low-temperature of 51.8°F (11°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines air temperature and relative humidity, in August is estimated at 84.2°F (29°C).

What is the least humid month in Mount Shasta?

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

What is the average humidity in August in Mount Shasta?

The average relative humidity in August is 45%.

How many days does it rain in August in Mount Shasta?

In Mount Shasta, in August, it is raining for 2.3 days, with typically 0.24" (6mm) of accumulated precipitation.

When it does not snow in Mount Shasta?

June through August are months without snowfall.

Does it snow in Mount Shasta in August?

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

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

In Mount Shasta, California, the average day length in August is 13h and 47min.

When is the sunrise / sunset in August in Mount Shasta?

On the first day of August, sunrise is at 6:05 am and sunset at 8:25 pm. On the last day of the month, sunrise is at 6:35 am and sunset at 7:43 pm PDT.

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

In August, the average sunshine duration is 12h.

What is the UV index reading in August in Mount Shasta?

In August, the average daily maximum UV index in Mount Shasta is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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"Hg

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

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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").
The 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).
The 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: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in August: 12h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).

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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

The 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

The months with the highest UV index are June and July (UV index 6).
The 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

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

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Mount Shasta, California, USA

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