Weather forecast for 10 days
Grand Coulee, WA

Weather forecast for the weekend

Saturday, May 3.

Cloudy
5:31 am

8:13 pm
PDT
Cloudy
68°F / 43°F
  • Wind: 14mph SW
  • Humidity: 53%
  • Precip. probability: 21%
  • Precipitation: 0"
  • UV index: 4
Tomorrow, dense clouds will linger over the area.
The temperature is expected to vary between a maximum of a delightful 68°F and a minimum of a frosty 42.8°F.
Tomorrow, the predicted high will correspond with the regular May temperature of 67.6°F.
Sunrise will be at 5:31 am and sunset at 8:13 pm; tomorrow's daylight will last for 14h and 42min.

Sunday, May 4.

Mostly Sunny
5:30 am

8:15 pm
PDT
Mostly Sunny
66°F / 41°F
  • Wind: 17mph NW
  • Humidity: 31%
  • Precip. probability: 0%
  • Precipitation: 0"
  • UV index: 6
On Sunday, in Grand Coulee, mostly sunny skies are expected.
The temperature scale will run from a maximum of an enjoyable 66.2°F to a minimum of a wintry 41°F.
Sunday's peak is expected to reflect the usual May high temperature of 67.6°F.
Sunrise will be at 5:30 am and sunset at 8:15 pm; the daylight will last for 14h and 45min.

Frequently asked questions

What is the weather forecast for Grand Coulee for tomorrow?
Tomorrow, expect mostly gray skies with limited brightness.
What will be the maximum temperature in Grand Coulee tomorrow?
Tomorrow, the highest temperature will be 68°F, while the lowest temperature will be 42.8°F.
The highest temperature tomorrow will be in line with the average maximum temperature in May. The lowest temperature will be also in line with the average low of 46°F.
When is the sunrise / sunset tomorrow?
On Saturday, in Grand Coulee, sunrise will be at 5:31 am and sunset at 8:13 pm (PDT).
How many hours of daylight will Grand Coulee have tomorrow?
In Grand Coulee, tomorrow, there will be 14h and 42min of daylight.
What is the weather forecast for Grand Coulee for Sunday?
On Sunday, in Grand Coulee, mostly sunny skies are expected.
What will be the highest temperature on Sunday?
On Sunday, the highest temperature will be 66.2°F, while the lowest temperature will be 41°F.
What is the weather forecast for Grand Coulee for the next ten days?
In Grand Coulee, a combination of sun-filled and overcast weather is predicted for the next ten days.
How hot will it be in the next ten days?
The maximum temperature will range between 66.2°F and 84.2°F, as the minimum temperature will vary between 41°F and 53.6°F.
What will be the hottest and the coldest days?
With the maximum temperature of 84.2°F, next Saturday will be the hottest day. With a maximum temperature of 66.2°F, Sunday will be the coldest day.

Long-term weather forecast

FriMay 2.
  • 82°F
  • 54°F
Sunny
Sunny
  • Wind: 9mph SSE
  • Humidity: 24%
  • UV index: 6
  • Precip. probability: 0%
  • Precipitation: 0"
  • 5:33 am 8:12 pm PDT
SatMay 3.
  • 68°F
  • 43°F
Cloudy
Cloudy
  • Wind: 14mph SW
  • Humidity: 53%
  • UV index: 4
  • Precip. probability: 21%
  • Precipitation: 0"
  • 5:31 am 8:13 pm PDT
SunMay 4.
  • 66°F
  • 41°F
Mostly Sunny
Mostly Sunny
  • Wind: 17mph NW
  • Humidity: 31%
  • UV index: 6
  • Precip. probability: 0%
  • Precipitation: 0"
  • 5:30 am 8:15 pm PDT
MonMay 5.
  • 72°F
  • 43°F
Mostly Sunny
Mostly Sunny
  • Wind: 9mph N
  • Humidity: 26%
  • UV index: 6
  • Precip. probability: 0%
  • Precipitation: 0"
  • 5:28 am 8:16 pm PDT
TueMay 6.
  • 77°F
  • 48°F
Partly Cloudy
Partly Cloudy
  • Wind: 7mph E
  • Humidity: 27%
  • UV index: 6
  • Precip. probability: 0%
  • Precipitation: 0"
  • 5:27 am 8:18 pm PDT
WedMay 7.
  • 82°F
  • 50°F
Mostly Sunny
Mostly Sunny
  • Wind: 12mph SSE
  • Humidity: 28%
  • UV index: 6
  • Precip. probability: 0%
  • Precipitation: 0"
  • 5:25 am 8:19 pm PDT
ThuMay 8.
  • 75°F
  • 45°F
Sunny
Sunny
  • Wind: 12mph WSW
  • Humidity: 29%
  • UV index: 6
  • Precip. probability: 0%
  • Precipitation: 0"
  • 5:24 am 8:20 pm PDT
FriMay 9.
  • 81°F
  • 50°F
Partly Cloudy
Partly Cloudy
  • Wind: 7mph SE
  • Humidity: 25%
  • UV index: 6
  • Precip. probability: 0%
  • Precipitation: 0"
  • 5:22 am 8:22 pm PDT
SatMay 10.
  • 84°F
  • 52°F
Partly Cloudy
Partly Cloudy
  • Wind: 9mph SE
  • Humidity: 26%
  • UV index: 6
  • Precip. probability: 4%
  • Precipitation: 0"
  • 5:21 am 8:23 pm PDT
SunMay 11.
  • 79°F
  • 52°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 11mph S
  • Humidity: 33%
  • UV index: 5
  • Precip. probability: 10%
  • Precipitation: 0"
  • 5:20 am 8:24 pm PDT
For the next ten days, a combination of dry and sunny and gloomy weather is expected.
Rainfall is not predicted in Grand Coulee in the upcoming days.
There will be a considerable variation in temperature in the upcoming days. Highs will range from 66.2°F to 84.2°F, while the fluctuation in night temperatures will be also significant, as nighttime lows are forecast to fall between 41°F and 53.6°F.
With the highest temperature of 84.2°F, next Saturday will be the hottest day; the lowest daytime temperature of the period will be reached on Sunday, peaking at 66.2°F.
Updated: May 2, 2025 @ 19:40:42 UTC
Published by: Weather U.S. | About Us
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Weather Forecasting & Climate
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