Climate Coulee Dam - Washington
| JanJa | FebFe | MarMa | AprAp | MayMa | JunJu | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 33 | 40 | 51 | 61 | 70 | 78 |
| Average low in ºF Av. low Lo | 23 | 25 | 31 | 37 | 45 | 51 |
| Av. precipitation in inch Av. precip. Pre. | 1.06 | 0.96 | 0.91 | 0.87 | 1.15 | 1.05 |
| JulJu | AugAu | SepSe | OctOc | NovNo | DecDe | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 87 | 87 | 76 | 61 | 43 | 32 |
| Average low in ºF Av. low Lo | 58 | 57 | 49 | 39 | 30 | 22 |
| Av. precipitation in inch Av. precip. Pre. | 0.64 | 0.28 | 0.44 | 0.68 | 1.30 | 1.45 |
What is the average weather in Coulee Dam, Washington?
Coulee Dam experiences a cold semi-arid climate, marked by very large seasonal temperature contrasts due to its inland location. Summers are warm and dry, while winters are cold. Precipitation is generally low throughout the year, with the wettest conditions occurring in winter and the driest in summer.
Coulee Dam Climate Graph - Washington Climate Chart
Daily normals Coulee Dam - Washington - January
Day | High ºF | Low ºF | Prec/mo inch | Prec/yr inch | Snow/mo inch | Snow/yr inch |
|---|---|---|---|---|---|---|
| 1 Jan | 31.4 | 22.6 | 0.04 | 0.04 | 0.00 | |
| 2 Jan | 31.4 | 22.6 | 0.08 | 0.08 | 0.00 | |
| 3 Jan | 31.4 | 22.7 | 0.12 | 0.12 | 0.00 | |
| 4 Jan | 31.5 | 22.7 | 0.16 | 0.16 | 0.00 | |
| 5 Jan | 31.5 | 22.8 | 0.20 | 0.20 | 0.00 | |
| 6 Jan | 31.6 | 22.8 | 0.25 | 0.25 | 0.00 | |
| 7 Jan | 31.6 | 22.9 | 0.29 | 0.29 | 0.00 | |
| 8 Jan | 31.7 | 22.9 | 0.33 | 0.33 | 0.00 | |
| 9 Jan | 31.8 | 23.0 | 0.37 | 0.37 | 0.00 | |
| 10 Jan | 31.8 | 23.0 | 0.42 | 0.42 | 0.00 | |
| 11 Jan | 31.9 | 23.1 | 0.46 | 0.46 | 0.00 | |
| 12 Jan | 32.0 | 23.1 | 0.50 | 0.50 | 0.00 | |
| 13 Jan | 32.1 | 23.2 | 0.54 | 0.54 | 0.00 | |
| 14 Jan | 32.2 | 23.2 | 0.58 | 0.58 | 0.00 | |
| 15 Jan | 32.3 | 23.3 | 0.61 | 0.61 | 0.00 | |
| 16 Jan | 32.4 | 23.3 | 0.65 | 0.65 | 0.00 | |
| 17 Jan | 32.6 | 23.4 | 0.68 | 0.68 | 0.00 | |
| 18 Jan | 32.7 | 23.4 | 0.72 | 0.72 | 0.00 | |
| 19 Jan | 32.8 | 23.5 | 0.75 | 0.75 | 0.00 | |
| 20 Jan | 33.0 | 23.5 | 0.79 | 0.79 | 0.00 | |
| 21 Jan | 33.1 | 23.6 | 0.82 | 0.82 | 0.00 | |
| 22 Jan | 33.3 | 23.6 | 0.86 | 0.86 | 0.00 | |
| 23 Jan | 33.4 | 23.6 | 0.89 | 0.89 | 0.00 | |
| 24 Jan | 33.6 | 23.7 | 0.92 | 0.92 | 0.00 | |
| 25 Jan | 33.8 | 23.7 | 0.96 | 0.96 | 0.00 | |
| 26 Jan | 34.0 | 23.8 | 0.99 | 0.99 | 0.00 | |
| 27 Jan | 34.2 | 23.8 | 1.02 | 1.02 | 0.00 | |
| 28 Jan | 34.4 | 23.8 | 1.05 | 1.05 | 0.00 | |
| 29 Jan | 34.6 | 23.9 | 1.08 | 1.08 | 0.00 | |
| 30 Jan | 34.8 | 23.9 | 1.12 | 1.12 | 0.00 | |
| 31 Jan | 35.0 | 23.9 | 1.15 | 1.15 | 0.00 |
Weather history Coulee Dam - July 2026
| Day | High ºF | Low ºF | Precip. inch | Snow inch | Snow d. inch |
|---|---|---|---|---|---|
| 01 Jul | 75.0 | 53.1 | 0.00 | 0.00 | 0.0 |
| 02 Jul | 77.0 | 53.1 | 0.00 | 0.00 | 0.0 |
| 03 Jul | 82.0 | 57.0 | 0.00 | 0.00 | 0.0 |
| 04 Jul | 87.1 | 64.0 | 0.00 | 0.00 | 0.0 |
| 05 Jul | - | - | - | - | - |
| 06 Jul | 87.1 | 57.0 | 0.00 | 0.00 | 0.0 |
| 07 Jul | - | - | - | - | - |
| 08 Jul | - | - | - | - | - |
| 09 Jul | - | - | - | - | - |
| 10 Jul | - | - | - | - | - |
| 11 Jul | - | - | - | - | - |
| 12 Jul | - | - | - | - | - |
| 13 Jul | - | - | - | - | - |
| 14 Jul | - | - | - | - | - |
| 15 Jul | - | - | - | - | - |
| 16 Jul | - | - | - | - | - |
| 17 Jul | - | - | - | - | - |
| 18 Jul | - | - | - | - | - |
| 19 Jul | - | - | - | - | - |
| 20 Jul | - | - | - | - | - |
| 21 Jul | - | - | - | - | - |
| 22 Jul | - | - | - | - | - |
| 23 Jul | - | - | - | - | - |
| 24 Jul | - | - | - | - | - |
| 25 Jul | - | - | - | - | - |
| 26 Jul | - | - | - | - | - |
| 27 Jul | - | - | - | - | - |
| 28 Jul | - | - | - | - | - |
| 29 Jul | - | - | - | - | - |
| 30 Jul | - | - | - | - | - |
| 31 Jul | - | - | - | - | - |
Past weather Coulee Dam
| Jul 26 | Normal | ||
|---|---|---|---|
| Average high temperature Av. high temp. | 81.6 ºF | 33 ºF | |
| Average low temperature Av. low temp. | 56.8 ºF | 23 ºF | |
| Total precipitation Total precip. | 0.00 inch | 1.06 inch | |
| Total snowfall Total snowfall | 0.00 inch | 0 inch | |
| Highest max temperature Highest max temp. | 87.1 ºF | - | |
| Lowest max temperature Lowest max temp. | 75.0 ºF | - | |
| Highest min temperature Highest min temp. | 64.0 ºF | - | |
| Lowest min temperature Lowest min temp. | 53.1 ºF | - | |
Past weather July 2026 incomplete - Missing data
Geo Coulee Dam - Washington
| Country | United States | |
|---|---|---|
| State | Washington | |
| County | Okanogan | |
| City | Coulee Dam | |
| Zip Code | 99116 | |
| Longitude | -118.98 dec. degr. | |
| Latitude | 47.97 dec. degr. | |
| Altitude - Elevation | 974ft | |
| ICAO | - | |
| IATA | - |
Date and Time Coulee Dam - Washington
| Local Time | 07:12 AM | |
|---|---|---|
| Sunrise | 05:05 AM | |
| Sunset | 08:57 PM | |
| Day/Night | Day | |
| Timezone | Pacific Daylight Time | |
| Timezone DB | America - Los Angeles |
Map of Coulee Dam - Washington
USGS National Map — Open interactive map
Coulee Dam weather averages
| Annual high temperature | 60ºF |
| Annual low temperature | 39ºF |
| Average annual precip. | 10.79 inch |
Station Data
Monthly averages Coulee Dam
Longitude: -118.98, Latitude: 47.97
Average weather Coulee Dam, WA - 99116
Monthly: 1991-2020 normals
History: 2007-2026
Abbreviations
Average precipitation in : Av. precipitation in
Jan: January, Feb: February, ...Jan: January, Feb: February, ...Ja: January, Fe: February, ...