Weather in San Jose: August
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Average day temperature: | 75.3°F |
| Average night temperature: | 59.8°F | |
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Sea water temperature: | 84.2°F |
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Number of sunny days: | 2 days |
| Day length: | 12.3 - 12.5 hours | |
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Number of rainy days: | 23 days |
| Precipitation totals: | 17.7 in. | |
| more information | ||
14 days
forecast
forecast
| San Jose |
sea water
temperature
temperature
| San Jose |
Air temperature in August, °F
Show year:
2025
2024
2023
The highest day temperature during August of 2025 was 77°F. At the same time the lowest night temperature was 55°F. Daily and nightly averages during August were 73.5°F and 58.4°F.
Sea water temperature in San Jose in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 84.4°F. The highest and lowest sea temperatures during the month were 85.3°F and 83.8°F.
Sunny, partly cloudy and cloudy days
Mostly all days in August are cloudy but sunny and partly cloudy days are also possible.
Precipitation total in August, in.
Precipitation total value in San Jose in August is 17.3 in.
Wind speed in August, mph
The average wind speed value in August is 3.0 mph
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in August is: 4.3.
Best time for vacation in San Jose
San Jose on a weather map
Places in Costa Rica:
Name
°F
24 Hours Forecast
San Jose
Local time: 20:20
December 14, sunday
2100
59°F
SW
4 mph
4 mph
December 15, monday
0000
59°F
SW
4 mph
4 mph
0300
59°F
SW
4 mph
4 mph
0600
57°F
SW
5 mph
5 mph
0900
66°F
SW
5 mph
5 mph
1200
68°F
SW
5 mph
5 mph
1500
68°F
SW
5 mph
5 mph
1800
57°F
SW
6 mph
6 mph
