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Kelso (WA) Weather and Climate: A Comprehensive Guide

Kelso experiences great temperature shifts. The city's weather can transition from warm days to cold weather. It is also known for its large amounts of rain/snowfall. Let’s explore the climate details in depth to provide you with a complete overview.

Average maximum day and minimum night temperature

The climate in Kelso is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 26°C in August to a chilly 7°C in the coolest month, December.

Nights are cooler, with lows often dropping to around 1°C during the colder months. Check out our detailed temperature page for more information.

Temperature ranges by month

Precipitation and rainy days

Kelso has a notably wet climate with abundant precipitation, recording 1254 mm of rain/snowfall per year. The climate in Kelso shows significant variation throughout the year. Expect heavy rainfall in December, with an average of 200 mm of precipitation over 23 rainy days.

In contrast, July offers drier and sunnier days, with around 13 mm of rainfall over 5 rainy days. For more details, please visit our Kelso Precipitation page.

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

Sunshine over the year

For those who appreciate different seasons, Kelso serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 11.1 hours of sunshine daily, and embrace the darker days in December, offering only 2.1 hours of daily sunlight. Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Data from: Portland, the United States of America (64 KM, 40 Miles).

Daily hours of sunshine

Data from: Portland, the United States of America (64 KM, 40 Miles).

Forecast for Kelso (WA)

Sat   Dec 21
12°C | 5°C
S 5 m/s
5 mm
broken clouds and rain

broken clouds and rain

Sun   Dec 22
12°C | 7°C
S 5 m/s
12 mm
overcast and heavy rain

overcast and heavy rain

Mon   Dec 23
11°C | 7°C
SE 5 m/s
6.9 mm
overcast and rain

overcast and rain

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

During the months of June, July and September 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 months have the greatest rainfall in Kelso?
    Most rainfall (rainy season) is seen in January, March, November and December.
  • Does Kelso have a dry season?
    Yes, the months of July and August are very dry.
  • Which is the warmest month in Kelso?
    August has an average maximum temperature of 26°C and is the warmest month of the year.
  • Which is the coldest month in Kelso?
    The coldest month is December with an average maximum temperature of 7°C.
  • Which is the wettest month in Kelso?
    December tops the wettest month list with 200 mm of rainfall.
  • Which is the driest month in Kelso?
    July is the driest month with 13 mm of precipitation.
  • Which is the sunniest month in Kelso?
    July is the sunniest month with an average of 332 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.