Portsmouth weather in August 2019

  • 27°C maximum daytime temperature in August in Portsmouth27
    27°C max day temperature
  • 9 hours of sunshine per day
  • 10 days with some rainfall in August in Portsmouth10
    10 days with some rainfall
  • 14°C minimum night-time temperature in August in Portsmouth14
    14°C min night temperature
  • 14 hours of daylight per day in August in Portsmouth14
    14 hours of daylight per day
  • Low heat & humidity in August in PortsmouthL
    Low heat & humidity
  • 70 mm monthly rainfall in August in Portsmouth70
    70 mm of monthly rainfall
  • UV (maximum) index 7 (High) in August in Portsmouth7
    7 (High) UV index
  • 18°C sea temperature in August in Portsmouth18
    18°C sea temperature

Going to Portsmouth? Find the best month to visit Portsmouth based on the weather.

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Expect 27°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Portsmouth in August. Check more long-term weather averages for Portsmouth in August before you book your next holiday to New Hampshire in 2019/2020.

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More about Portsmouth

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The August weather guide for Portsmouth, New Hampshire 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)

Guide to Portsmouth weather in August

The average maximum daytime temperature in Portsmouth in August is a warm 27°C (81°F) with low heat & humidity. The average night-time temperature is usually a comfortable 14°C (57°F). There are usually 9 hours of bright sunshine each day, which represents 61% of the 14 hours of daylight.

Expect 70mm (2.8 inches) of rainfall across the whole of August with 10 days with some rain falling. Maximum UV levels will be high (7 UV index) at midday when the skies are clear.

The average sea temperature in and around Portsmouth in August is 18°C (64°F).

Portsmouth sunrise & sunset times for August 2019

Browse the sunrise & sunset times for Portsmouth in August 2019. Select a month to view Portsmouth sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st August 2019 05:33 20:05
Friday, 2nd August 2019 05:34 20:03
Saturday, 3rd August 2019 05:36 20:02
Sunday, 4th August 2019 05:37 20:01
Monday, 5th August 2019 05:38 20:00
Tuesday, 6th August 2019 05:39 19:58
Wednesday, 7th August 2019 05:40 19:57
Thursday, 8th August 2019 05:41 19:56
Friday, 9th August 2019 05:42 19:54
Saturday, 10th August 2019 05:43 19:53
Sunday, 11th August 2019 05:44 19:52
Monday, 12th August 2019 05:45 19:50
Tuesday, 13th August 2019 05:46 19:49
Wednesday, 14th August 2019 05:47 19:47
Thursday, 15th August 2019 05:49 19:46
Friday, 16th August 2019 05:50 19:44
Saturday, 17th August 2019 05:51 19:43
Sunday, 18th August 2019 05:52 19:41
Monday, 19th August 2019 05:53 19:40
Tuesday, 20th August 2019 05:54 19:38
Wednesday, 21st August 2019 05:55 19:37
Thursday, 22nd August 2019 05:56 19:35
Friday, 23rd August 2019 05:57 19:33
Saturday, 24th August 2019 05:58 19:32
Sunday, 25th August 2019 05:59 19:30
Monday, 26th August 2019 06:01 19:28
Tuesday, 27th August 2019 06:02 19:27
Wednesday, 28th August 2019 06:03 19:25
Thursday, 29th August 2019 06:04 19:23
Friday, 30th August 2019 06:05 19:22
Saturday, 31st August 2019 06:06 19:20
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