Best year time to visit Ottumwa

General weather information about Ottumwa

Average annual temperature is 9.6 °C

Absolute maximum temperature: 38.7 °C

Absolute minimum temperature: -29.3 °C

Number of sunny days: 230 days

Number of rainy days: 99 days

Number of snow days: 36 days

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

Ottumwa air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)9.814.219.826.829.836.337.038.735.830.018.315.7
Average daytime temperature (°C)0.74.04.311.624.228.029.830.026.015.39.85.0
Average temperature (°C)-3.7-3.0-2.34.917.421.823.223.419.69.43.70.2
Average night temperature (°C)-6.6-7.8-6.2-0.611.316.117.217.914.44.9-0.6-3.3
Absolute minimum temperature (°C)-16.8-29.3-13.4-13.01.410.511.413.49.8-10.0-9.0-12.2

Ottumwa 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)9.310.511.913.514.815.515.114.012.511.09.68.9
Daylight minimum duration (h)8.09.011.012.014.015.014.013.011.010.09.08.0
Sunshine mean duration (h)5.07.98.39.511.912.113.211.310.47.87.75.7
Precipitation (mm)162546415511883924962439
Sunny days202017181810142321202425
Rainy days443613201789942
Snow days7411600000224

Ottumwa - weather forecast by months

Ottumwa weather in januaryOttumwa weather in februaryOttumwa weather in marchOttumwa weather in aprilOttumwa weather in mayOttumwa weather in juneOttumwa weather in julyOttumwa weather in augustOttumwa weather in septemberOttumwa weather in octoberOttumwa weather in novemberOttumwa weather in december

Best time to visit Ottumwa:

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

  • May — 11.9(h)
  • June — 12.1(h)
  • July — 13.2(h)

Months with the longest average daylight duration in Ottumwa:

  • June — 15.5(h)

The largest precipitation sum in Ottumwa is at

  • June — 118(mm)
  • July — 83(mm)
  • August — 92(mm)

    • Weather forecast in the closest to Ottumwa admin centers

    Weather forecast in the closest towns to Ottumwa

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    Frequently asked questions

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