Best year time to visit Portsmouth

General weather information about Portsmouth

Average annual temperature is 19.1 °C

Absolute maximum temperature: 30.5 °C

Absolute minimum temperature: 0.8 °C

Number of sunny days: 183 days

Number of rainy days: 182 days

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* Weather data for Portsmouth United States is based on climate observations for 2026 year

Portsmouth air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)19.619.821.222.223.826.930.529.529.024.521.821.0
Average daytime temperature (°C)15.216.316.319.621.124.428.328.126.321.917.215.3
Average temperature (°C)12.113.513.918.119.823.227.327.224.920.015.413.0
Average night temperature (°C)10.111.211.816.618.722.026.126.223.818.613.911.2
Absolute minimum temperature (°C)2.70.83.812.613.817.224.124.220.713.73.95.1

Portsmouth monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.014.014.013.012.011.010.09.0
Daylight mean duration (h)10.110.912.013.114.014.514.213.412.411.310.39.8
Daylight minimum duration (h)9.010.011.012.013.014.013.012.011.010.09.09.0
Sunshine mean duration (h)7.07.48.49.810.011.611.111.29.99.47.56.9
Precipitation (mm)1131254513412210711213215661104142
Sunny days17121816141471215201721
Rainy days141613141716241915111310
Snow days000000000000

Portsmouth - weather forecast by months

Portsmouth weather in januaryPortsmouth weather in februaryPortsmouth weather in marchPortsmouth weather in aprilPortsmouth weather in mayPortsmouth weather in junePortsmouth weather in julyPortsmouth weather in augustPortsmouth weather in septemberPortsmouth weather in octoberPortsmouth weather in novemberPortsmouth weather in december

Best time to visit Portsmouth:

The best time to visit Portsmouth during the most sunny months:

  • June — 11.6(h)

The largest precipitation sum in Portsmouth is at

  • September — 156(mm)
  • December — 142(mm)

    • Weather forecast in the closest to Portsmouth admin centers

    Weather forecast in the closest towns to Portsmouth

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    Frequently asked questions

    When is the best time to visit Portsmouth?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Portsmouth.
    What is the weather like in Portsmouth?
    See average temperature, rainfall and daylight hours for Portsmouth by month in the table above.
    How many sunny days does Portsmouth have?
    The monthly weather statistics above show sunshine and rainfall patterns for Portsmouth throughout the year.