San Juan weather in January 2026

Expect 29°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in San Juan in January based on long-term weather averages. There is usually 12 days with some rainfall and 20 mm of average monthly rainfall in January.

  • 29°C maximum daytime temperature in January in San Juan29
    29°C max day temperature
  • 7 hours of sunshine per day
  • 12 days with some rainfall in January in San Juan12
    12 days with some rainfall
  • 14°C minimum night-time temperature in January in San Juan14
    14°C min night temperature
  • 11 hours of daylight per day in January in San Juan11
    11 hours of daylight per day
  • Moderate heat & humidity in January in San JuanM
    Moderate heat & humidity
  • 20 mm monthly rainfall in January in San Juan20
    20 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in January in San Juan8
    8 (Very High) UV index

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The January weather guide for Dominican Republic (San Juan) 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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More about the Dominican Republic

How hot is it in San Juan in January?

Daytime temperatures usually reach 29°C in San Juan in January with moderate heat and humidity, falling to 14°C at night.

How sunny is it in San Juan in January?

There are normally 7 hours of bright sunshine each day in San Juan in January - that's 65% of daylight hours.

Does it rain in San Juan in January?

There are usually 12 days with some rain in San Juan in January and the average monthly rainfall is 20mm.

San Juan January sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st January 2026 07:18 18:19
Friday, 16th January 2026 07:21 18:29
Saturday, 31st January 2026 07:19 18:38

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