Best year time to visit Portland

General weather information about Portland

Average annual temperature is 11.1 °C

Absolute maximum temperature: 26.8 °C

Absolute minimum temperature: -2.5 °C

Number of sunny days: 79 days

Number of rainy days: 285 days

Number of snow days: 1 day

Look at detailed online map of Portland

* Weather data for Portland Ireland is based on climate observations for 2026 year

Portland air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)12.714.615.518.122.126.821.224.026.321.313.612.6
Average daytime temperature (°C)8.410.110.213.117.121.217.718.818.614.410.29.2
Average temperature (°C)6.17.67.39.413.117.014.915.615.011.47.87.4
Average night temperature (°C)4.15.14.76.19.012.612.212.711.88.75.75.4
Absolute minimum temperature (°C)-2.5-0.9-1.31.25.88.09.210.56.22.4-1.2-1.9

Portland monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)8.010.012.014.016.016.016.015.013.011.09.07.0
Daylight mean duration (h)8.29.911.914.015.916.916.414.712.710.68.77.6
Daylight minimum duration (h)7.08.010.012.015.016.015.013.011.09.07.07.0
Sunshine mean duration (h)3.53.04.37.09.110.98.68.66.84.54.42.5
Precipitation (mm)9826145815211215711717414384112
Sunny days8937158126794
Rainy days231927231622302924242127
Snow days001000000000

Portland - weather forecast by months

Portland weather in januaryPortland weather in februaryPortland weather in marchPortland weather in aprilPortland weather in mayPortland weather in junePortland weather in julyPortland weather in augustPortland weather in septemberPortland weather in octoberPortland weather in novemberPortland weather in december

Best time to visit Portland:

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

  • May — 9.1(h)
  • June — 10.9(h)
  • July — 8.6(h)
  • August — 8.6(h)

Months with the longest average daylight duration in Portland:

  • May — 15.9(h)
  • June — 16.9(h)
  • July — 16.4(h)

The largest precipitation sum in Portland is at

  • March — 145(mm)
  • July — 157(mm)
  • September — 174(mm)
  • October — 143(mm)

    • Weather forecast in the closest to Portland admin centers

    Weather forecast in the closest towns to Portland

    Explore Portland

    See also
    MapTrains schedule
    Plan your trip
    AccommodationExperiencesBlog

    Frequently asked questions

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