Normal weather for San Diego in August
It's hot in August in San Diego with an average temperature of 37°C. Temperatures this month range from a low of 36°C to a high of 38°C. At night, you can expect temperatures between 23°C and 25°C.
In August, there is an average of 57 mm of precipitation, spread over 10 days. The wind speed is around 5 Bft, mostly coming from the Southeast.
August isn’t a good time to be in San Diego. The average temperature of 37°C this month is uncomfortably hot for a pleasant stay.
San Diego in August |
London | ||
|---|---|---|---|
 Average Temperature |
37°C | 22°C | |
 High Temp |
38°C | 24°C | |
| Low Temp |
36°C | 19°C | |
 Total Precipitation |
57 mm | 60 mm | |
| Rainy Days |
10 days | 10 days | |
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
The hurricane season in San Diego runs from June to November.
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Start of August
The month of August starts in San Diego with hot temperatures, averaging around 37°C during the day and nights close to 25°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Mid-August
By mid-August, the average daytime temperature rises to around 38°C, with nights close to 25°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
End of August
By the end of August, the average daytime temperature in San Diego will be around 37°C, with nights close to 25°C. A shower might show up, but overall the weather will be dry and sunny.
Temperature records
With 42°C, San Diego hit the highest temperature in the last 10 years in August 2023. The lowest daytime temperature in this month was 26°C in 2022. The extreme night temperatures ranged from a low of 19°C to a high of 28°C.
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Daily Temperature in August in San Diego
This chart shows the average daily temperatures, both day and night, for each day in August in San Diego, 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 Diego
The chart below shows the average daily precipitation in August for San Diego, 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 around 10 days of rain in San Diego.
Daily UV Index in August in San Diego
This chart shows the average daily UV index in August in San Diego, 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 Diego Over the Years
This chart shows the average temperature in August in San Diego, measured in degrees Celsius, over the past years.
Total Precipitation in August in San Diego Over the Years
This chart shows the average precipitation in August in San Diego, 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 Diego
Click on a specific day in August for detailed info on the typical weather on that day in San Diego. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in August in San Diego
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Average Weather in San Diego by Month
Click on a month below to see detailed weather info for San Diego. 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 Diego for all months at once
