Weather in Winterthur in September

General weather information about Winterthur

Average annual temperature is 13.6 °C

Absolute maximum temperature: 35.3 °C

Absolute minimum temperature: -10.0 °C

Number of sunny days: 183 days

Number of rainy days: 180 days

Number of snow days: 2 days

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

Winterthur air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)17.019.818.129.929.734.834.432.935.327.620.416.3
Average daytime temperature (°C)9.210.011.520.022.526.830.829.225.420.512.29.5
Average temperature (°C)5.24.95.913.716.120.625.023.620.314.87.05.4
Average night temperature (°C)2.00.71.18.610.015.220.319.116.110.52.71.9
Absolute minimum temperature (°C)-3.6-10.0-4.80.23.910.216.915.011.34.9-4.9-3.5

Winterthur monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.014.014.014.013.011.010.09.0
Daylight mean duration (h)9.710.712.013.314.414.914.713.712.511.210.09.4
Daylight minimum duration (h)9.010.011.012.013.014.014.013.011.010.09.09.0
Sunshine mean duration (h)4.96.97.69.411.610.911.710.48.38.57.74.8
Precipitation (mm)118497915844107159851674367173
Sunny days12161316191191315192218
Rainy days19101814121922181512813
Snow days020000000000

Winterthur - weather forecast by months

Winterthur weather in januaryWinterthur weather in februaryWinterthur weather in marchWinterthur weather in aprilWinterthur weather in mayWinterthur weather in juneWinterthur weather in julyWinterthur weather in augustWinterthur weather in septemberWinterthur weather in octoberWinterthur weather in novemberWinterthur weather in december

Best time to visit Winterthur:

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

  • May — 11.6(h)
  • June — 10.9(h)
  • July — 11.7(h)

The largest precipitation sum in Winterthur is at

  • April — 158(mm)
  • July — 159(mm)
  • September — 167(mm)
  • December — 173(mm)

    • Weather forecast in the closest to Winterthur admin centers

    Weather forecast in the closest towns to Winterthur

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    Frequently asked questions

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