San Jose weather in January 2026

Expect daytime maximum temperatures of 23°C in San Jose, Costa Rica in January based on long-term weather averages. There are 7 hours of sunshine per day on average with 12 days with some rainfall.

  • 23°C maximum daytime temperature in January in San Jose23
    23°C max day temperature
  • 7 hours of sunshine per day
  • 12 days with some rainfall in January in San Jose12
    12 days with some rainfall
  • 15°C minimum night-time temperature in January in San Jose15
    15°C min night temperature
  • 12 hours of daylight per day in January in San Jose12
    12 hours of daylight per day
  • No heat & humidity in January in San Jose0
    No heat & humidity
  • 6 mm monthly rainfall in January in San Jose6
    6 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in January in San Jose11
    11 (Extreme) UV index

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The January weather guide for Costa Rica (San Jose) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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

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How hot is it in San Jose in January?

Daytime temperatures usually reach 23°C in San Jose in January, falling to 15°C at night.

How sunny is it in San Jose in January?

There are normally 7 hours of bright sunshine each day in San Jose in January - that's 58% of daylight hours.

Does it rain in San Jose in January?

There are usually 12 days with some rain in San Jose in January and the average monthly rainfall is 6mm.

San Jose January sunrise & sunset times

Browse the sunrise and sunset times for San Jose in January 2026. Select a month to view San Jose sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st January 2026 05:53 17:27
Friday, 16th January 2026 05:58 17:35
Saturday, 31st January 2026 05:59 17:41

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