Best year time to visit Waterloo

General weather information about Waterloo

Average annual temperature is 17.1 °C

Absolute maximum temperature: 39.9 °C

Absolute minimum temperature: -10.1 °C

Number of sunny days: 222 days

Number of rainy days: 143 days

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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)20.722.226.331.634.038.738.739.938.631.126.518.4
Average daytime temperature (°C)12.113.117.022.526.631.434.835.331.123.016.712.8
Average temperature (°C)6.06.510.415.620.825.428.629.225.217.611.27.7
Average night temperature (°C)1.82.15.710.116.220.323.724.020.413.37.04.2
Absolute minimum temperature (°C)-10.1-6.4-5.03.86.715.918.817.715.5-0.2-3.8-2.8

Waterloo monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.014.014.013.012.011.010.09.0
Daylight mean duration (h)10.010.912.013.114.114.514.313.512.411.310.39.8
Daylight minimum duration (h)9.010.011.012.013.014.013.012.011.010.09.09.0
Sunshine mean duration (h)7.07.28.39.910.211.711.912.210.68.77.67.1
Precipitation (mm)286344104791521126690747951
Sunny days211618181313181920202323
Rainy days1012131218171312101178
Snow days000000000000

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:

  • July — 11.9(h)
  • August — 12.2(h)

The largest precipitation sum in Waterloo is at

  • April — 104(mm)
  • June — 152(mm)
  • July — 112(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.