Best year time to visit Waterloo

General weather information about Waterloo

Average annual temperature is 11.7 °C

Absolute maximum temperature: 40.0 °C

Absolute minimum temperature: -6.8 °C

Number of sunny days: 180 days

Number of rainy days: 184 days

Number of snow days: 1 day

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

Waterloo air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)15.413.717.026.932.131.235.940.031.827.817.417.9
Average daytime temperature (°C)9.49.010.513.622.726.230.431.124.017.811.511.0
Average temperature (°C)5.23.54.68.315.017.421.122.316.711.87.07.2
Average night temperature (°C)2.10.00.84.49.210.413.215.011.07.54.04.8
Absolute minimum temperature (°C)-6.6-6.8-2.8-2.64.26.110.410.26.9-3.8-5.1-1.6

Waterloo 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)4.06.26.16.710.813.413.612.19.67.25.03.3
Precipitation (mm)13792175243232861162109155286
Sunny days61145202529261814148
Rainy days251627251152512171623
Snow days010000000000

Waterloo - weather forecast by months

Waterloo weather in januaryWaterloo weather in februaryWaterloo weather in marchWaterloo weather in aprilWaterloo weather in mayWaterloo weather in juneWaterloo weather in julyWaterloo weather in augustWaterloo weather in septemberWaterloo weather in octoberWaterloo weather in novemberWaterloo weather in december

Best time to visit Waterloo:

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

  • May — 10.8(h)
  • June — 13.4(h)
  • July — 13.6(h)
  • August — 12.1(h)

Months with the longest average daylight duration in Waterloo:

  • June — 15.5(h)

The largest precipitation sum in Waterloo is at

  • March — 175(mm)
  • April — 243(mm)
  • November — 155(mm)
  • December — 286(mm)

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    Frequently asked questions

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