Average weather for San José in August
It's hot in August in San José with an average temperature of 30°C. Temperatures this month range from a low of 29°C to a high of 32°C. At night, you can expect temperatures between 22°C and 25°C.
Start of August
The month of August starts in San José with hot temps, averaging around 32°C during the day and nights around 24°C. There’s little chance of precipitation. The weather’s mostly sunny and dry. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
Mid August
By mid-August, daytime temps drop to around 31°C, with nights around 24°C. Not much precipitation expected during this period. It’s mostly dry and sunny. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
End of August
By the end of August, the average daytime temperature in San José is around 30°C, while nighttime temps are about 23°C. There’s hardly any chance of precipitation. The weather will be mostly dry with plenty of sun.
In August, there is an average of 55 mm of precipitation, spread over 2 days. The wind speed is around 4 Bft, mostly coming from the Southeast.
San José in August |
New York | ||
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30°C | 30°C | |
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32°C | 31°C | |
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29°C | -5°C | |
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55 mm | 79 mm | |
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2 days | 13 days |
UV index
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.
Is August a good time to visit San José?
August is a good month to be in San José for sunny weather. You’ll have high temperatures and not too much rain.
Temperature records
With 41°C in 2022, San José reached the highest temperature in August over the past 10 years. The lowest daytime temperature in this month was 25°C in 2014. The extreme nighttime temperatures ranged from a lowest recorded value of 16°C to a highest value of 29°C.
Check out the climate of San José for all months and discover the best travel time
Daily Temperature in August in San José
This chart shows the average daily high and low temperatures in August for San José, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in August in San José
The chart below shows the average daily precipitation in August for San José, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed 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 it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for August, you can expect about 2 days of precipitation in San José.
Daily UV index in August in San José
This chart shows the average daily UV index in August in San José, 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 José over the years
This chart shows the average temperature in August in San José, measured in degrees Celsius, over the past few years.
Total precipitation in August in San José over the years
This chart shows the average precipitation in August in San José, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in August for San José
Click on any day in August to get detailed info about the usual weather on that day in San José. Check out the historical temperatures and precipitation over the past 10 years on this day.































Weather experiences in August in San José
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Average weather in San José by month
Click on a month below to see detailed weather info for San José. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.