Weather in San Diego in January 2018

Expect 19°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in San Diego in January. Check more long-term weather averages for San Diego in January before you book your next holiday to California in 2018.

Key weather averages for San Diego in January

  • 19°C maximum daytime temperature in January in San Diego19
    19°C max day temperature
  • 8 hours of sunshine per day (76% of daylight hours) in January in San Diego8
    8 hours of sunshine per day
  • 6 days with some rainfall in January in San Diego6
    6 days with some rainfall
  • 7°C minimum night-time temperature in January in San Diego7
    7°C min night temperature
  • 10 hours of daylight per day in January in San Diego10
    10 hours of daylight per day
  • No heat & humidity in January in San Diego0
    No heat & humidity
  • 53 mm monthly rainfall in January in San Diego53
    53 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in January in San Diego3
    3 (Moderate) UV index
  • 15°C sea temperature in January in San Diego15
    15°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 Diego

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Guide to San Diego weather in January

The average maximum daytime temperature in San Diego in January is a comfortable 19°C (66°F). The average night-time temperature is usually a cold 7°C (45°F). There are usually 8 hours of bright sunshine each day, which represents 76% of the 10 hours of daylight.

Expect 53mm (2.1 inches) of rainfall across the whole of January with 6 days with some rain falling. Maximum UV levels will be moderate (3 UV index) at midday when the skies are clear.

The average sea temperature in and around San Diego in January is 15°C (59°F).

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

San Diego sunrise & sunset times for January 2018

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st January 2018 06:51 16:54
Tuesday, 2nd January 2018 06:51 16:55
Wednesday, 3rd January 2018 06:51 16:55
Thursday, 4th January 2018 06:51 16:56
Friday, 5th January 2018 06:52 16:57
Saturday, 6th January 2018 06:52 16:58
Sunday, 7th January 2018 06:52 16:59
Monday, 8th January 2018 06:52 16:59
Tuesday, 9th January 2018 06:52 17:00
Wednesday, 10th January 2018 06:52 17:01
Thursday, 11th January 2018 06:52 17:02
Friday, 12th January 2018 06:51 17:03
Saturday, 13th January 2018 06:51 17:04
Sunday, 14th January 2018 06:51 17:05
Monday, 15th January 2018 06:51 17:06
Tuesday, 16th January 2018 06:51 17:06
Wednesday, 17th January 2018 06:51 17:07
Thursday, 18th January 2018 06:50 17:08
Friday, 19th January 2018 06:50 17:09
Saturday, 20th January 2018 06:50 17:10
Sunday, 21st January 2018 06:49 17:11
Monday, 22nd January 2018 06:49 17:12
Tuesday, 23rd January 2018 06:48 17:13
Wednesday, 24th January 2018 06:48 17:14
Thursday, 25th January 2018 06:47 17:15
Friday, 26th January 2018 06:47 17:16
Saturday, 27th January 2018 06:46 17:17
Sunday, 28th January 2018 06:46 17:18
Monday, 29th January 2018 06:45 17:19
Tuesday, 30th January 2018 06:45 17:20
Wednesday, 31st January 2018 06:44 17:21
  • Save an extra £30 on return flights to Los Angeles (LAX)
  • Fly direct from London Heathrow (LHR) with Air New Zealand
  • Book with the exclusive Air New Zealand promo code
  • Travel between 18th Aug & 31st Dec 2017 (inclusive)
Show discount code ******L30

Expires at 23:59 on Sunday 6th August 2017 · View all Air New Zealand offers

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Check San Diego 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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