Temperatures in August
It's cool to moderate in August in San José with an average temperature of 18°C. Temperatures this month range from a low of 14°C to a high of 20°C. At night, you can expect temperatures between 6°C and 10°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for San José 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 José with mild temperatures, averaging around 18°C during the day and nights close to 9°C. You can expect regular precipitation, but there’s also a chance for some sunny days in the first days of the month.
Mid-August
By mid-August, the average daytime temperature stays the same at 18°C, with nights close to 7°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 José will be around 19°C, with nights close to 9°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
Precipitation in August
In August, there is an average of 118 mm of precipitation, spread over 8 days. The wind speed is around 4 Bft, mostly coming from the Southeast.
The average precipitation chance is 26% per day this month. Though it seems pretty low, the weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in August for San José. 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 José in August |
London | ||
|---|---|---|---|
 Average Temperature |
18°C | 22°C | |
 High Temp |
20°C | 24°C | |
| Low Temp |
14°C | 19°C | |
 Total Precipitation |
118 mm | 60 mm | |
| Rainy Days |
8 days | 10 days | |
July
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is August a good time to visit San José?
After some sun? Then August isn’t the best time to be in San José. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for San José in August
With 32°C, San José hit the highest temperature in the last 10 years in August 2015. The lowest daytime temperature in this month was 8°C in 2019. The extreme night temperatures ranged from a low of -3°C to a high of 19°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 temperatures, both day and night, for each day in August in San José, 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 José
The chart below shows the average daily precipitation in August for San José, 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 8 days of rain 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 years.
Total Precipitation in August in San José Over the Years
This chart shows the average precipitation in August in San José, 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 José
Click on a specific day in August for detailed info on the typical 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
Have you been to San José in August?
Share your weather experience in August in San José.
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.
