San Jose weather

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

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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.

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)