Best year time to visit Saint Helens

General weather information about Saint Helens

Average annual temperature is 11.7 °C

Absolute maximum temperature: 39.0 °C

Absolute minimum temperature: -11.8 °C

Number of sunny days: 166 days

Number of rainy days: 198 days

Number of snow days: 1 day

Look at detailed online map of Saint Helens

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

Saint Helens air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)13.313.517.928.631.930.233.739.032.126.917.214.1
Average daytime temperature (°C)8.57.410.613.622.624.028.630.123.317.911.59.9
Average temperature (°C)5.23.35.38.415.416.420.121.716.612.77.46.7
Average night temperature (°C)2.80.11.74.910.411.113.815.812.39.54.64.3
Absolute minimum temperature (°C)-4.8-11.8-3.9-0.66.87.511.311.68.32.1-2.60.1

Saint Helens monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.011.012.014.015.015.015.014.013.011.010.08.0
Daylight mean duration (h)9.110.411.913.514.915.715.314.112.510.99.58.7
Daylight minimum duration (h)8.09.011.012.014.015.014.013.011.010.08.08.0
Sunshine mean duration (h)2.94.55.46.111.012.112.911.48.76.55.12.9
Precipitation (mm)141115157233394542993132166271
Sunny days7835212227201616138
Rainy days2419282510841114151723
Snow days010000000000

Saint Helens - weather forecast by months

Saint Helens weather in januarySaint Helens weather in februarySaint Helens weather in marchSaint Helens weather in aprilSaint Helens weather in maySaint Helens weather in juneSaint Helens weather in julySaint Helens weather in augustSaint Helens weather in septemberSaint Helens weather in octoberSaint Helens weather in novemberSaint Helens weather in december

Best time to visit Saint Helens:

The best time to visit Saint Helens during the most sunny months:

  • May — 11.0(h)
  • June — 12.1(h)
  • July — 12.9(h)
  • August — 11.4(h)

Months with the longest average daylight duration in Saint Helens:

  • June — 15.7(h)
  • July — 15.3(h)

The largest precipitation sum in Saint Helens is at

  • March — 157(mm)
  • April — 233(mm)
  • November — 166(mm)
  • December — 271(mm)

    • Weather forecast in the closest to Saint Helens admin centers

    Weather forecast in the closest towns to Saint Helens

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    Frequently asked questions

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