Weather in Coulee Dam, WA
Coulee Dam, Sunday, 25 October, 04:14
Overcast. Feels like 40°. High 56°, low 39°.
Monthly outlook for Coulee Dam, WA: average high 49.9°, average low 36.5°. That is 0.1° below the climate normal for October. Precipitation is expected on 4 days (about 2.5 inches), against a normal of 5 days and 1.0 inches. The warmest day looks like 26 October (55.9°), the coolest 30 October (29.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 25 October – 3 November | 49.6° | 51.4° | -1° |
| 4 November – 13 November | 50.4° | 46.9° | +2° |
| 14 November – 23 November | at normal | 42.3° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Grand Coulee (2 mi).
0
Coulee Dam, Monday, 26 October
Light rain. High 56°, low 40°.
0.02Coulee Dam, Tuesday, 27 October
Light rain. High 54°, low 38°.
0.06Coulee Dam, Wednesday, 28 October
Light rain. High 48°, low 37°.
0.02Coulee Dam, Thursday, 29 October
Light rain. High 47°, low 32°.
0.01Coulee Dam, Friday, 30 October
Light rain. High 43°, low 30°.
0
Coulee Dam, Saturday, 31 October
Mostly clear. High 47°, low 30°.
0Coulee Dam, Sunday, 1 November
Overcast. High 46°, low 30°.
0
Coulee Dam, Monday, 2 November
Clear. High 49°, low 31°.
0Coulee Dam, Tuesday, 3 November
Overcast. High 48°, low 35°.
0Coulee Dam, Wednesday, 4 November
Overcast. High 50°, low 33°.
1.36Coulee Dam, Thursday, 5 November
Rain. High 47°, low 43°.
0.95Coulee Dam, Friday, 6 November
Rain. High 55°, low 48°.
0Coulee Dam, Saturday, 7 November
Light rain. High 53°, low 43°.
0.07Coulee Dam, Sunday, 8 November
Light rain. High 48°, low 39°.
0Coulee Dam, Monday, 9 November
Mostly clear. High 49°, low 35°.
0.06
Coulee Dam, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.07
Coulee Dam, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.06Coulee Dam, Thursday, 12 November
Climate normal for this date — 60-year average.
0.1Coulee Dam, Friday, 13 November
Climate normal for this date — 60-year average.
0.05Coulee Dam, Saturday, 14 November
Climate normal for this date — 60-year average.
0.08Coulee Dam, Sunday, 15 November
Climate normal for this date — 60-year average.
0.08Coulee Dam, Monday, 16 November
Climate normal for this date — 60-year average.
0.09Coulee Dam, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.05Coulee Dam, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.1Coulee Dam, Thursday, 19 November
Climate normal for this date — 60-year average.
0.09Coulee Dam, Friday, 20 November
Climate normal for this date — 60-year average.
0.09Coulee Dam, Saturday, 21 November
Climate normal for this date — 60-year average.
0.09Coulee Dam, Sunday, 22 November
Climate normal for this date — 60-year average.
0.08Coulee Dam, Monday, 23 November
Climate normal for this date — 60-year average.
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Coulee Dam, WA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Coulee Dam, WA since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.
Sun and moon today
Weather history
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