Weather in San Juan in January 2018

Expect 27°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in San Juan in January. Check more long-term weather averages for San Juan in January before you book your next holiday to Puerto Rico in 2018.

Key weather averages for San Juan in January

  • 27°C maximum daytime temperature in January in San Juan27
    27°C max day temperature
  • 8 hours of sunshine per day (69% of daylight hours) in January in San Juan8
    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

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

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

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More about San Juan

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Guide to San Juan weather in January

The average maximum daytime temperature in San Juan in January is a warm 27°C (81°F) with moderate heat & humidity. The average night-time temperature is usually a comfortable 20°C (68°F). There are usually 8 hours of bright sunshine each day, which represents 69% of the 11 hours of daylight.

Expect 116mm (4.6 inches) of rainfall across the whole of January with 20 days with some rain falling. Maximum UV levels will be very high (8 UV index) at midday when the skies are clear.

The average sea temperature in and around San Juan in January is 26°C (79°F).

The weather in San Juan in January is represented by San Juan.

San Juan sunrise & sunset times for January 2018

Browse the sunrise & sunset times for San Juan in January 2018. Select a month to view San Juan sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st January 2018 06:57 18:00
Tuesday, 2nd January 2018 06:57 18:00
Wednesday, 3rd January 2018 06:57 18:01
Thursday, 4th January 2018 06:58 18:01
Friday, 5th January 2018 06:58 18:02
Saturday, 6th January 2018 06:58 18:03
Sunday, 7th January 2018 06:58 18:03
Monday, 8th January 2018 06:59 18:04
Tuesday, 9th January 2018 06:59 18:04
Wednesday, 10th January 2018 06:59 18:05
Thursday, 11th January 2018 06:59 18:06
Friday, 12th January 2018 06:59 18:06
Saturday, 13th January 2018 06:59 18:07
Sunday, 14th January 2018 07:00 18:08
Monday, 15th January 2018 07:00 18:08
Tuesday, 16th January 2018 07:00 18:09
Wednesday, 17th January 2018 07:00 18:10
Thursday, 18th January 2018 07:00 18:10
Friday, 19th January 2018 07:00 18:11
Saturday, 20th January 2018 07:00 18:11
Sunday, 21st January 2018 07:00 18:12
Monday, 22nd January 2018 07:00 18:13
Tuesday, 23rd January 2018 06:59 18:13
Wednesday, 24th January 2018 06:59 18:14
Thursday, 25th January 2018 06:59 18:14
Friday, 26th January 2018 06:59 18:15
Saturday, 27th January 2018 06:59 18:16
Sunday, 28th January 2018 06:59 18:16
Monday, 29th January 2018 06:59 18:17
Tuesday, 30th January 2018 06:58 18:17
Wednesday, 31st January 2018 06:58 18:18
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Check San Juan weather for a particular month by selecting from the list below. Monthly weather guides include figures for temperature, rainfall, sunshine hours and sea temperature plus daily sunrise & sunset times.

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