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Washington (MO) Weather and Climate: A Comprehensive Guide

Washington experiences great temperature shifts. The city's weather can transition from very warm days to cold weather. It also has a relatively rain/snowy climate with high levels of precipitation. Now, let’s explore all the climate details to give you a full picture.

Average maximum day and minimum night temperature

The climate in Washington is known for significant temperature differences throughout the year, making the weather dynamic. On average, daytime temperatures range from a very warm 31°C in July to a chilly 5°C in January.

Nighttime temperatures can drop, with average lows reaching -6°C in January. Check out our detailed temperature page for more information.

Temperature ranges by month

Precipitation and rainy days

Washington has a notably wet climate with abundant precipitation, recording 1141 mm of rain/snowfall per year. The seasons in Washington, bring significant changes in precipitation. The wettest month, May, receives high rainfall, with an average of 126 mm of precipitation. This rainfall is distributed across 15 rainy days.

In contrast, the driest month, January, experiences much less snow/rainfall, totaling 49 mm over 6 snowy/rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Washington Precipitation page.

The mean monthly precipitation over the year, including rain, hail and snow

Sunshine over the year

In Washington, summer days are longer and more sunny, with daily sunshine hours peaking at 10.4 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 4.3 hours per average day. Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Data from: St. Louis, the United States of America (71 KM, 44 Miles).

Daily hours of sunshine

Data from: St. Louis, the United States of America (71 KM, 44 Miles).

Forecast for Washington (MO)

Sat   Dec 21
3°C | -5°C
N 1 m/s
almost clear and no rain

almost clear and no rain

Sun   Dec 22
9°C | -4°C
S 4 m/s
almost clear and no rain

almost clear and no rain

Mon   Dec 23
10°C | 2°C
SW 3 m/s
0.4 mm
overcast and  chance of slight rain

overcast and chance of slight rain

The best time of year to visit Washington in the United States of America

During the months of April, May and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • Which is the warmest month in Washington?
    July has an average maximum temperature of 31°C and is the warmest month of the year.
  • Which is the coldest month in Washington?
    The coldest month is January with an average maximum temperature of 5°C.
  • Which is the wettest month in Washington?
    May tops the wettest month list with 126 mm of rainfall.
  • Which is the driest month in Washington?
    January is the driest month with 49 mm of precipitation.
  • Which is the sunniest month in Washington?
    July is the sunniest month with an average of 311 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.