San Jose weather

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Usually in August
- 24
- 17
- 6
Weather by month
Now Today
- 24
- 4
5-day forecast

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

The weather guide for San Jose, Costa Rica shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by MeteoBlue. Find out more about our data sources.

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Which is the hottest month in San Jose?

The hottest time of year in San Jose is normally May. Expect maximum daytime temperatures to reach 25°C with low heat and humidity.

Which month has the most rain in San Jose?

In terms of rainfall, September is usually the wettest month in San Jose with 372mm on average. There are normally 24 days in September with some rain.

When is it sunniest in San Jose?

The sunniest time of year in San Jose is normally March with bright sunshine on average for 60% of daylight hours; that's 7 hours of sunshine per day.

Metric (°C / mm) | Imperial (°F / inches)

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Compare San Jose weather with the USA

Below the San Jose weather chart shows average maximum daytime temperature for San Jose, Costa Rica and the USA (Washington).

Maximum daytime temperature (°C)

San Jose, Costa Rica

USA (Washington)

Jan

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Dec

Metric (°C / mm) | Imperial (°F / inches)

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Destination

Where's hot in Costa Rica right now?

Below are the temperatures expected today at popular destinations in Costa Rica. Select a destination to compare today's forecast with average weather conditions.