Best year time to visit Umatilla Reservation

General weather information about Umatilla Reservation

Average annual temperature is 12.0 °C

Absolute maximum temperature: 39.3 °C

Absolute minimum temperature: -15.9 °C

Number of sunny days: 203 days

Number of rainy days: 153 days

Number of snow days: 9 days

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

Umatilla Reservation air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)12.512.614.526.631.832.736.939.332.726.619.016.7
Average daytime temperature (°C)7.97.99.814.823.926.832.830.924.617.59.38.3
Average temperature (°C)3.62.64.68.917.019.825.323.817.611.64.94.1
Average night temperature (°C)0.7-1.10.94.211.013.317.617.712.37.21.71.4
Absolute minimum temperature (°C)-11.2-15.9-5.5-3.74.96.613.49.95.6-4.1-5.6-4.3

Umatilla Reservation monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.011.012.014.015.015.015.014.013.011.010.08.0
Daylight mean duration (h)9.210.411.913.514.915.615.314.112.510.99.58.8
Daylight minimum duration (h)8.09.011.012.014.015.014.013.011.010.08.08.0
Sunshine mean duration (h)4.65.77.38.412.213.214.011.19.48.35.54.2
Precipitation (mm)3950908517502426466072
Sunny days1412592221312318181614
Rainy days16112420990812131417
Snow days152100000000

Umatilla Reservation - weather forecast by months

Umatilla Reservation weather in januaryUmatilla Reservation weather in februaryUmatilla Reservation weather in marchUmatilla Reservation weather in aprilUmatilla Reservation weather in mayUmatilla Reservation weather in juneUmatilla Reservation weather in julyUmatilla Reservation weather in augustUmatilla Reservation weather in septemberUmatilla Reservation weather in octoberUmatilla Reservation weather in novemberUmatilla Reservation weather in december

Best time to visit Umatilla Reservation:

The best time to visit Umatilla Reservation during the most sunny months:

  • May — 12.2(h)
  • June — 13.2(h)
  • July — 14.0(h)
  • August — 11.1(h)

Months with the longest average daylight duration in Umatilla Reservation:

  • June — 15.6(h)
  • July — 15.3(h)

The largest precipitation sum in Umatilla Reservation is at

  • March — 90(mm)
  • April — 85(mm)
  • November — 60(mm)
  • December — 72(mm)

    • Weather forecast in the closest to Umatilla Reservation admin centers

    Weather forecast in the closest towns to Umatilla Reservation

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    Frequently asked questions

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