San Juan weather in January 2021

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  • 27°C maximum daytime temperature in January in San Juan27
    27°C max day temperature
  • 8 hours of sunshine per day
  • 20 days with some rainfall in January in San Juan20
    20 days with some rainfall
  • 20°C minimum night-time temperature in January in San Juan20
    20°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
  • 116 mm monthly rainfall in January in San Juan116
    116 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in January in San Juan8
    8 (Very High) UV index
  • 26°C sea temperature in January in San Juan26
    26°C sea temperature

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The January weather guide for San Juan, Puerto Rico 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.

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How hot is it in San Juan in January?

Daytime temperatures usually reach 27°C in San Juan in January with moderate heat and humidity, falling to 20°C at night.

How sunny is it in San Juan in January?

There are normally 8 hours of bright sunshine each day in San Juan in January - that's 69% of daylight hours.

How warm is the sea around San Juan in January?

The average sea temperature around San Juan in January is 26°C.

Does it rain in San Juan in January?

There are usually 20 days with some rain in San Juan in January and the average monthly rainfall is 116mm.

San Juan sunrise & sunset times for January 2021

Browse the sunrise & sunset times for San Juan in January 2021. Select a month to view San Juan sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st January 2021 06:57 18:00
Saturday, 16th January 2021 07:00 18:09
Sunday, 31st January 2021 06:58 18:18
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Metric (°C / mm)  |  Imperial (°F / inches)

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Where is hot in Puerto Rico in January for 2021/2022?

Below are average maximum temperatures at popular destinations in Puerto Rico in January. Select a destination to see more weather parameters.

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