Weather forecast for 10 daysUmtanum, WA

Weather forecast for the weekend

Saturday Oct 17, 2026

  • 68°F
  • 34°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 17mphNNW 330°
  • Humidity: 35%
  • UV index: 3
  • Sunrise: 7:23 am PDT
  • Sunset: 6:11 pm PDT
  • ▼
On Saturday, October 17, clouds and sunshine will create a dynamic sky throughout the day.
A substantial temperature fluctuation from a delightful 68°F at its peak to a wintry 33.8°F at its lowest point is predicted.
Weather conditions lean warmer, with the temperature tracking September's average high of 71.1°F.
Sunrise was at 7:23 am and sunset will be at 6:11 pm; the daylight will last for 10h and 48min.

Sunday Oct 18, 2026

  • 64°F
  • 39°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 6mphNE 38°
  • Humidity: 43%
  • UV index: 3
  • Sunrise: 7:24 am PDT
  • Sunset: 6:09 pm PDT
  • ▼
Tomorrow, sun-filled skies will remain for most of the day.
The temperature is expected to vary between a maximum of a breezy 64.4°F and a minimum of a cold 39.2°F.
Tomorrow, meteorological data suggests the high will feel more like September, based on a forecast of 64.4°F.
Sunrise will be at 7:24 am and sunset at 6:09 pm; tomorrow's daylight will last for 10h and 45min.

10-day overview

Daily temperatures

Maximum temperature: 68°C.
Coldest period: Saturday - Monday 55°C.

Chance of precipitation

Highest chance: Sunday 25.10. 19%.

Long-term weather forecast

  • Saturday
  • Oct 17, 2026
  • 68°F
  • 34°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 17mphNNW 330°
  • Humidity: 35%
  • UV index: 3
  • Sunrise: 7:23 am PDT
  • Sunset: 6:11 pm PDT
  • ▼
  • Sunday
  • Oct 18, 2026
  • 64°F
  • 39°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 6mphNE 38°
  • Humidity: 43%
  • UV index: 3
  • Sunrise: 7:24 am PDT
  • Sunset: 6:09 pm PDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 63°F
  • 39°F
Cloudy
Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 4mphN 349°
  • Humidity: 46%
  • UV index: 1
  • Sunrise: 7:25 am PDT
  • Sunset: 6:07 pm PDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 68°F
  • 37°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 6mphNNE 15°
  • Humidity: 48%
  • UV index: 3
  • Sunrise: 7:27 am PDT
  • Sunset: 6:05 pm PDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 68°F
  • 37°F
Sunny
Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 4mphSSW 209°
  • Humidity: 49%
  • UV index: 3
  • Sunrise: 7:28 am PDT
  • Sunset: 6:04 pm PDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 64°F
  • 39°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 9mphNW 319°
  • Humidity: 57%
  • UV index: 2
  • Sunrise: 7:30 am PDT
  • Sunset: 6:02 pm PDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 57°F
  • 32°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 3%
  • Precipitation: 0"
  • Wind: 12mphWNW 302°
  • Humidity: 53%
  • UV index: 3
  • Sunrise: 7:31 am PDT
  • Sunset: 6:00 pm PDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 55°F
  • 34°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 7mphNNE 15°
  • Humidity: 59%
  • UV index: 2
  • Sunrise: 7:33 am PDT
  • Sunset: 5:58 pm PDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 55°F
  • 34°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 19%
  • Precipitation: 0"
  • Wind: 6mphN 10°
  • Humidity: 64%
  • UV index: 2
  • Sunrise: 7:34 am PDT
  • Sunset: 5:57 pm PDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 55°F
  • 34°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 11%
  • Precipitation: 0"
  • Wind: 6mphN 5°
  • Humidity: 67%
  • UV index: 2
  • Sunrise: 7:36 am PDT
  • Sunset: 5:55 pm PDT
  • ▼
For the coming ten days, a combination of cloudy and mostly clear weather is forecasted.
Rain is not anticipated in Umtanum in the upcoming period.
Noticeable swings in temperature are expected across the forecast period. The maximum temperature will vary between 55.4°F and 68°F, while the minimum temperature is forecast to range between 32°F and 39.2°F.
Saturday, Tuesday and Wednesday, with the highest temperature of 68°F, will be the warmest days; with a maximum temperature of 55.4°F, next Saturday through next Monday will be the coldest days.
Updated: Oct 17, 2026 @ 20:41:49 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Saturday, sun and clouds will share the sky, creating a partly cloudy day.

Today, the maximum temperature will be 68°F, while the minimum temperature will be 33.8°F.
Today, the maximum temperature will be uncommonly higher than the average highest temperature of 56.3°F in October. The lowest temperature today will be a couple of degrees lower than the average low temperature.

On Saturday, in Umtanum, sunrise was at 7:23 am and sunset will be at 6:11 pm (PDT).

In Umtanum, Washington, the length of the day today will be 10h and 48min.

Tomorrow, sunny intervals will be long-lasting, with few disruptions.

Tomorrow, the maximum temperature will be 64.4°F, while the minimum temperature will be 39.2°F.
The highest temperature tomorrow will be a couple of degrees higher than the average maximum temperature in October. Tomorrow, the lowest temperature will be in line with the average low temperature.

On Sunday, in Umtanum, sunrise will be at 7:24 am and sunset at 6:09 pm (PDT).

In Umtanum, the length of the day tomorrow will be 10h and 45min.