August weather forecast and climate
San Bernardino, CA

Scenic settlement spot on the foot of the iconic San Bernardino Mountains in California, with a view of the snow peaks of the San Gorgiono mountains
Scenic settlement spot on the foot of the iconic San Bernardino Mountains in California, with a view of the snow peaks of the San Gorgiono mountains

Weather in August

August, the last month of the summer, in San Bernardino, is also a hot month, with average temperature fluctuating between 91.9°F (33.3°C) and 65.8°F (18.8°C).

Temperature

The warmest month is August, with an average high-temperature of 91.9°F (33.3°C) and an average low-temperature of 65.8°F (18.8°C).

Humidity

With an average relative humidity of 38%, August is the least humid month.

Rainfall

In San Bernardino, during 1.7 rainfall days, 0.08" (2mm) of precipitation is typically accumulated. In San Bernardino, California, during the entire year, the rain falls for 46.6 days and collects up to 6.18" (157mm) of precipitation.

Snowfall

In San Bernardino snow does not fall in January, March through December.

Daylight

In San Bernardino, the average length of the day is 13.4h.

Sunshine

In San Bernardino, the average sunshine is 12.1h.

UV index

Months with the highest UV index are June through August, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 7 transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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.
[Resources]

FAQ

What is the warmest month in San Bernardino?

With an average high-temperature of 91.9°F (33.3°C) and an average low-temperature of 65.8°F (18.8°C), August is the warmest month in San Bernardino, California.

What is the temperature in August in San Bernardino?

The average high-temperature, in August, in San Bernardino, California, is 91.9°F (33.3°C), while the average low-temperature is 65.8°F (18.8°C).

What is the least humid month in San Bernardino?

August is the least humid month in San Bernardino, with an average relative humidity of 38%.

What is the average humidity in August in San Bernardino?

In San Bernardino, the average relative humidity in August is 38%.

How much does it rain in San Bernardino in August?

In San Bernardino, in August, during 1.7 rainfall days, 0.08" (2mm) of precipitation is typically accumulated.

When it does not snow in San Bernardino?

January, March through December are months without snowfall in San Bernardino, California.

How many hours of daylight does San Bernardino have in August?

The average length of the day in August in San Bernardino, California, is 13.4h.

How long on average sun shines in August in San Bernardino?

In San Bernardino, California, the average sunshine in August is 12.1h.

What are the months with the highest UV index in San Bernardino?

June through August, with an average maximum UV index of 7, are months with the highest UV index in San Bernardino.

What is the UV index intensity in August in San Bernardino?

In San Bernardino, the average daily maximum UV index in August is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health from unprotected exposure to the UV radiation.

Average temperature in August
San Bernardino, CA

Average temperature in August - San Bernardino, CA
  • Average high temperature in August: 91.9°F

The warmest month (with the highest average high temperature) is August (91.9°F).
The month with the lowest average high temperature is December (59.9°F).

  • Average low temperature in August: 65.8°F

The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is February (43.5°F).

[Resources]

Average pressure in August
San Bernardino, CA

Average pressure in August - San Bernardino, CA
  • Average pressure in August: 29.87"

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is June (29.85").

[Resources]

Average wind speed in August
San Bernardino, CA

Average wind speed in August - San Bernardino, CA
  • Average wind speed in August: 4.8mph

The windiest months (with the highest average wind speed) are April and May (6mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).

[Resources]

Average humidity in August
San Bernardino, CA

Average humidity in August - San Bernardino, CA
  • Average humidity in August: 38%

The month with the highest relative humidity is February (53%).
The month with the lowest relative humidity is August (38%).

[Resources]

Average rainfall in August
San Bernardino, CA

Average rainfall in August - San Bernardino, CA
  • Average rainfall in August: 0.08"

The wettest month (with the highest rainfall) is December (1.42").
The driest month (with the least rainfall) is June (0.04").

[Resources]

Average rainfall days in August
San Bernardino, CA

Average rainfall days in August - San Bernardino, CA
  • Average rainfall days in August: 1.7 days

The month with the highest number of rainy days is March (6.7 days).
The month with the least rainy days is June (1.2 days).

[Resources]

Average snowfall days in August
San Bernardino, CA

Average snowfall days in August - San Bernardino, CA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (0.1 days).
Months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

[Resources]

Average daylight in August /
Average sunshine in August
San Bernardino, CA

Average daylight in August / Average sunshine in August - San Bernardino, CA
  • Average daylight in August: 13.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in August: 12.1h

The month with the most sunshine is July (Average sunshine: 12.2h).
The month with the least sunshine is December (Average sunshine: 6.9h).

[Resources]

Average sunshine days in August
San Bernardino, CA

Average sunshine days in August - San Bernardino, CA
  • Average sunshine days in August: 27.7 days

Months with the most sunshine days are June and October (27.9 days).
The month with the least sunshine days is February (21.7 days).

[Resources]

Average UV index in August
San Bernardino, CA

Average UV index in August - San Bernardino, CA
  • Average UV index in August: 7

Months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

[Resources]

Average cloud cover in August
San Bernardino, CA

Average cloud cover in August - San Bernardino, CA
  • Average cloud cover in August: 5

Months with the most cloud cover are February and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).

[Resources]

Average visibility in August
San Bernardino, CA

Average visibility in August - San Bernardino, CA
  • Average visibility in August: 6mi

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

[Resources]