Best year time to visit St. Helens

General weather information about St. Helens

Average annual temperature is 9.1 °C

Absolute maximum temperature: 30.6 °C

Absolute minimum temperature: -18.7 °C

Number of sunny days: 125 days

Number of rainy days: 197 days

Number of snow days: 43 days

Look at detailed online map of St. Helens

* Weather data for St. Helens Canada is based on climate observations for 2026 year

St. Helens air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)6.610.110.727.729.430.630.026.329.327.113.913.6
Average daytime temperature (°C)1.32.34.113.419.123.924.822.921.614.76.45.2
Average temperature (°C)-1.2-2.4-0.27.812.718.420.618.416.911.33.32.5
Average night temperature (°C)-3.4-5.9-3.93.17.013.516.914.613.18.70.30.6
Absolute minimum temperature (°C)-13.8-18.7-11.7-5.70.38.013.18.56.41.0-5.1-4.6

St. Helens monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.011.012.014.015.015.015.014.013.011.010.09.0
Daylight mean duration (h)9.310.511.913.414.715.415.114.012.511.09.79.0
Daylight minimum duration (h)8.09.011.012.014.015.014.013.011.010.09.08.0
Sunshine mean duration (h)1.85.46.38.311.711.711.910.29.14.84.82.6
Precipitation (mm)91104110116635813996571397282
Sunny days58913221651115687
Rainy days1512916914262015251818
Snow days11813100000046

St. Helens - weather forecast by months

St. Helens weather in januarySt. Helens weather in februarySt. Helens weather in marchSt. Helens weather in aprilSt. Helens weather in maySt. Helens weather in juneSt. Helens weather in julySt. Helens weather in augustSt. Helens weather in septemberSt. Helens weather in octoberSt. Helens weather in novemberSt. Helens weather in december

Best time to visit St. Helens:

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

  • May — 11.7(h)
  • June — 11.7(h)
  • July — 11.9(h)
  • August — 10.2(h)

Months with the longest average daylight duration in St. Helens:

  • June — 15.4(h)

The largest precipitation sum in St. Helens is at

  • July — 139(mm)
  • October — 139(mm)

    • Weather forecast in the closest to St. Helens admin centers

    Weather forecast in the closest towns to St. Helens

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    Frequently asked questions

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