Weather in Thornhill in May

General weather information about Thornhill

Average annual temperature is 8.5 °C

Absolute maximum temperature: 29.9 °C

Absolute minimum temperature: -26.4 °C

Number of sunny days: 139 days

Number of rainy days: 201 days

Number of snow days: 25 days

Look at detailed online map of Thornhill

* Weather data for Thornhill Canada is based on climate observations for 2026 year

Thornhill air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)11.213.08.116.023.629.928.926.625.524.514.614.5
Average daytime temperature (°C)4.41.23.710.114.218.124.122.420.915.97.24.7
Average temperature (°C)1.3-3.40.15.69.514.220.419.017.112.33.51.6
Average night temperature (°C)-2.1-7.8-3.11.85.411.117.616.014.49.50.3-1.3
Absolute minimum temperature (°C)-8.7-26.4-12.5-3.90.96.214.812.47.13.3-5.9-11.1

Thornhill 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)9.310.411.913.514.815.515.214.012.511.09.68.9
Daylight minimum duration (h)8.09.011.012.014.015.014.013.011.010.09.08.0
Sunshine mean duration (h)3.85.36.99.59.87.38.28.77.76.85.53.9
Precipitation (mm)255831195471360269246111167128199
Sunny days7121115151011315111514
Rainy days18814131620202815201415
Snow days686200000012

Thornhill - weather forecast by months

Thornhill weather in januaryThornhill weather in februaryThornhill weather in marchThornhill weather in aprilThornhill weather in mayThornhill weather in juneThornhill weather in julyThornhill weather in augustThornhill weather in septemberThornhill weather in octoberThornhill weather in novemberThornhill weather in december

Best time to visit Thornhill:

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

  • April — 9.5(h)
  • May — 9.8(h)
  • August — 8.7(h)

Months with the longest average daylight duration in Thornhill:

  • June — 15.5(h)

The largest precipitation sum in Thornhill is at

  • January — 255(mm)
  • June — 360(mm)
  • July — 269(mm)
  • August — 246(mm)

    • Weather forecast in the closest to Thornhill admin centers

    Weather forecast in the closest towns to Thornhill

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    Frequently asked questions

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