Temperatures in August
It's hot in August in San Bernardino with an average temperature of 35°C. Temperatures this month range from a low of 33°C to a high of 38°C. At night, you can expect temperatures between 18°C and 21°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for San Bernardino in August. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of August
The month of August starts in San Bernardino with hot temperatures, averaging around 36°C during the day and nights close to 20°C. There’s little chance of precipitation. The weather is mostly sunny and dry.
Mid-August
By mid-August, the average daytime temperature stays the same at 36°C, with nights close to 21°C. Not much precipitation expected during this period. It’s mostly dry with sunshine. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
End of August
By the end of August, the average daytime temperature in San Bernardino will be around 36°C, with nights close to 20°C. No precipitation expected, with plenty of sunshine on the horizon.
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Precipitation in August
According to weather history, there is only 6,7 mm of precipitation in August. The wind speed is around 4 Bft, mostly coming from the West.
The average chance of precipitation is only 3% in August.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in August for San Bernardino. 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.
San Bernardino in August |
London | ||
|---|---|---|---|
 Average Temperature |
35°C | 22°C | |
 High Temp |
38°C | 24°C | |
| Low Temp |
33°C | 19°C | |
 Total Precipitation |
6,7 mm | 60 mm | |
| Rainy Days |
1 day | 10 days | |
July
UV index
The UV index is a maximum of 10 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is August a good time to visit San Bernardino?
August is a great month to be in San Bernardino for sunny weather. You’ll get high temperatures and not too much rain this month.
Temperature records for San Bernardino in August
With 43°C, San Bernardino hit the highest temperature in the last 10 years in August 2017. The lowest daytime temperature in this month was 24°C in 2021. The extreme night temperatures ranged from a low of 14°C to a high of 28°C.
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Daily Temperature in August in San Bernardino
This chart shows the average daily temperatures, both day and night, for each day in August in San Bernardino, 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 August in San Bernardino
The chart below shows the average daily precipitation in August for San Bernardino, 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 August, you can expect about 1 day of rain in San Bernardino.
Daily UV Index in August in San Bernardino
This chart shows the average daily UV index in August in San Bernardino, 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 August in San Bernardino Over the Years
This chart shows the average temperature in August in San Bernardino, measured in degrees Celsius, over the past years.
Total Precipitation in August in San Bernardino Over the Years
This chart shows the average precipitation in August in San Bernardino, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in August for San Bernardino
Click on a specific day in August for detailed info on the typical weather on that day in San Bernardino. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in August in San Bernardino
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Average Weather in San Bernardino by Month
Click on a month below to see detailed weather info for San Bernardino. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of San Bernardino for all months at once
