Grand Coulee, WA weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Grand Coulee now
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Grand Coulee weather by the hour
Grand Coulee weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Grand Coulee.
This week in Grand Coulee
Sunrise, sunset and moon in Grand Coulee
What is the weather usually like in Grand Coulee?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 89°F average high
- Januarycoldest month · 24°F average low
- 11.1 inprecipitation per year · 281 mm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Grand Coulee: May–June and August–September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station COULEE DAM 1 SW, WA US (USC00451767), adjusted for the elevation of Grand Coulee.
Grand Coulee weather month by month
Sunrise and sunset in Grand Coulee through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:38 AM | 4:32 PM | 8 h 54 min |
| February | 6:59 AM | 5:20 PM | 10 h 20 min |
| March | 7:06 AM | 7:03 PM | 11 h 56 min |
| April | 6:04 AM | 7:47 PM | 13 h 43 min |
| May | 5:15 AM | 8:29 PM | 15 h 14 min |
| June | 4:54 AM | 8:59 PM | 16 h 4 min |
| July | 5:11 AM | 8:52 PM | 15 h 41 min |
| August | 5:49 AM | 8:10 PM | 14 h 20 min |
| September | 6:32 AM | 7:10 PM | 12 h 37 min |
| October | 7:14 AM | 6:09 PM | 10 h 54 min |
| November | 7:01 AM | 4:20 PM | 9 h 19 min |
| December | 7:37 AM | 4:05 PM | 8 h 28 min |
Times for the 15th of each month, local time (America/Los Angeles).
What is the weather like in Grand Coulee?
Grand Coulee has a cold semi-arid climate. The warmest month is July, with an average high of 89°F (31°C), and the coldest is January, with average lows of 24°F (-4°C).
It gets about 11.1 inches (281 mm) of precipitation a year. The wettest month is December and the driest is August.
The best time to visit Grand Coulee is May–June and August–September. At 1,483 ft of elevation, nights are mild most of the year. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
More about Grand Coulee
Weather in towns near Grand Coulee
Questions about the weather in Grand Coulee
What is the hottest month in Grand Coulee?
July, with an average high of 89°F (31°C).
What is the coldest month in Grand Coulee?
January, with an average low of 24°F (-4°C).
How much does it rain in Grand Coulee?
About 11.1 inches (281 mm) a year; the wettest month is December.
Does it snow in Grand Coulee?
Snow is very rare or not recorded at the nearest weather station.
When is the best time to visit Grand Coulee?
May–June and August–September, when temperatures are most pleasant and rainy days are fewer.
What climate does Grand Coulee have?
Cold semi-arid (Köppen BSk).
What is the weather like in Grand Coulee in November?
Highs average 44°F and lows 32°F, with about 1.2 inches of precipitation.
What time is sunrise in Grand Coulee?
Around 7:01 AM in mid-November, and sunset around 4:20 PM. Today’s exact times are shown above.
Where does this Grand Coulee weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Grand Coulee.
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