Weather forecast for 10 daysGrand Coulee, WA
Weather forecast for the weekend
Sunday Oct 18, 2026
- 64°F
- 41°F
Mostly Sunny
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 4mphNE 48°
- Humidity: 43%
- UV index: 3
- Sunrise: 7:20 am PDT
- Sunset: 6:02 pm PDT
- details ▼
Tomorrow, mostly clear skies and sunshine will create ideal daytime conditions.
Temperatures will oscillate between an enjoyable 64.4°F at their highest and a wintry 41°F at their lowest.
The temperature for tomorrow is forecasted to be a few degrees higher than the October average of 56.3°F.
Sunrise will be at 7:20 am and sunset at 6:02 pm; tomorrow's daylight will last for 10h and 42min.
Temperatures will oscillate between an enjoyable 64.4°F at their highest and a wintry 41°F at their lowest.
The temperature for tomorrow is forecasted to be a few degrees higher than the October average of 56.3°F.
Sunrise will be at 7:20 am and sunset at 6:02 pm; tomorrow's daylight will last for 10h and 42min.
10-day overview
Daily temperatures
Warmest day: Tuesday 68°C.
Coldest day: Sunday 25.10. 54°C.
Coldest day: Sunday 25.10. 54°C.
Chance of precipitation
Highest chance: Sunday 25.10. 24%.
Long-term weather forecast
- Saturday
- Oct 17, 2026
- min.
- 32°F
Clear
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 7mphNW 309°
- Humidity: 55%
- UV index: 0
- Sunrise: 7:18 am PDT
- Sunset: 6:03 pm PDT
- details ▼
- Sunday
- Oct 18, 2026
- 64°F
- 41°F
Mostly Sunny
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 4mphNE 48°
- Humidity: 43%
- UV index: 3
- Sunrise: 7:20 am PDT
- Sunset: 6:02 pm PDT
- details ▼
- Monday
- Oct 19, 2026
- 63°F
- 39°F
Cloudy
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 4mphN 354°
- Humidity: 44%
- UV index: 1
- Sunrise: 7:21 am PDT
- Sunset: 6:00 pm PDT
- details ▼
- Tuesday
- Oct 20, 2026
- 68°F
- 39°F
Partly Cloudy
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 6mphNNW 336°
- Humidity: 45%
- UV index: 3
- Sunrise: 7:23 am PDT
- Sunset: 5:58 pm PDT
- details ▼
- Wednesday
- Oct 21, 2026
- 66°F
- 41°F
Mostly Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 5mphESE 103°
- Humidity: 48%
- UV index: 2
- Sunrise: 7:24 am PDT
- Sunset: 5:56 pm PDT
- details ▼
- Thursday
- Oct 22, 2026
- 64°F
- 43°F
Partly Cloudy
- Precip. probability: 12%
- Precipitation: 0"
- Wind: 6mphNNW 330°
- Humidity: 56%
- UV index: 2
- Sunrise: 7:26 am PDT
- Sunset: 5:54 pm PDT
- details ▼
- Friday
- Oct 23, 2026
- 61°F
- 34°F
Mostly Sunny
- Precip. probability: 8%
- Precipitation: 0"
- Wind: 12mphWNW 302°
- Humidity: 45%
- UV index: 2
- Sunrise: 7:27 am PDT
- Sunset: 5:52 pm PDT
- details ▼
- Saturday
- Oct 24, 2026
- 55°F
- 36°F
Partly Cloudy
- Precip. probability: 8%
- Precipitation: 0"
- Wind: 7mphENE 75°
- Humidity: 54%
- UV index: 2
- Sunrise: 7:29 am PDT
- Sunset: 5:51 pm PDT
- details ▼
- Sunday
- Oct 25, 2026
- 54°F
- 36°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 7mphNE 35°
- Humidity: 59%
- UV index: 2
- Sunrise: 7:30 am PDT
- Sunset: 5:49 pm PDT
- details ▼
- Monday
- Oct 26, 2026
- 55°F
- 36°F
Partly Cloudy
- Precip. probability: 17%
- Precipitation: 0"
- Wind: 6mphE 96°
- Humidity: 62%
- UV index: 2
- Sunrise: 7:32 am PDT
- Sunset: 5:47 pm PDT
- details ▼
A combination of cloudy and mostly clear weather is anticipated.
Rain is not forecasted in Grand Coulee in the upcoming period.
Substantial differences in temperature are forecasted in the coming days. The temperature is expected to swing from 53.6°F up to 68°F, while the low temperature range extends from 32°F to 42.8°F.
Expect the warmest day on Tuesday, with temperatures peaking at 68°F; the coldest day will be next Sunday, with a maximum of 53.6°F.
Rain is not forecasted in Grand Coulee in the upcoming period.
Substantial differences in temperature are forecasted in the coming days. The temperature is expected to swing from 53.6°F up to 68°F, while the low temperature range extends from 32°F to 42.8°F.
Expect the warmest day on Tuesday, with temperatures peaking at 68°F; the coldest day will be next Sunday, with a maximum of 53.6°F.
Updated: Oct 18, 2026 @ 02:24:09 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Frequently asked questions
On Sunday, in Grand Coulee, sunshine will take center stage, with just faint traces of clouds.
Tomorrow, the maximum temperature will be 64.4°F, while the minimum temperature will be 41°F.
The maximum temperature will be a couple of degrees higher than the average highest temperature of 56.3°F in October. Tomorrow, the lowest temperature will be in line with the average low temperature.
The maximum temperature will be a couple of degrees higher than the average highest temperature of 56.3°F in October. Tomorrow, the lowest temperature will be in line with the average low temperature.
On Sunday, in Grand Coulee, sunrise will be at 7:20 am and sunset at 6:02 pm (PDT).
Tomorrow, the daylight will last for 10h and 42min.
