Weather in Coulee Dam, WA
Coulee Dam, Wednesday, 28 October, 03:13
Overcast. Feels like 39°. High 47°, low 35°.
Monthly outlook for Coulee Dam, WA: average high 49.3°, average low 36.9°. That is 0.4° above the climate normal for October. Precipitation is expected on 5 days (about 1.6 inches), against a normal of 5 days and 1.0 inches. The warmest day looks like 5 November (54.5°), the coolest 31 October (29.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 28 October – 6 November | 49.3° | 49.8° | -0.3° |
| 7 November – 16 November | 49.3° | 45.7° | +2° |
| 17 November – 26 November | at normal | 40.4° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Grand Coulee (2 mi).
0Coulee Dam, Thursday, 29 October
Overcast. High 46°, low 33°.
0.11
Coulee Dam, Friday, 30 October
Snow. High 45°, low 33°.
0Coulee Dam, Saturday, 31 October
Overcast. High 41°, low 30°.
0
Coulee Dam, Sunday, 1 November
Mostly clear. High 52°, low 33°.
0Coulee Dam, Monday, 2 November
Overcast. High 47°, low 30°.
0Coulee Dam, Tuesday, 3 November
Overcast. High 51°, low 36°.
0Coulee Dam, Wednesday, 4 November
Overcast. High 54°, low 35°.
0Coulee Dam, Thursday, 5 November
Overcast. High 55°, low 38°.
0Coulee Dam, Friday, 6 November
Overcast. High 54°, low 37°.
0.29
Coulee Dam, Saturday, 7 November
Rain. High 49°, low 45°.
0.83Coulee Dam, Sunday, 8 November
Rain. High 48°, low 44°.
0Coulee Dam, Monday, 9 November
Overcast. High 53°, low 43°.
0.29Coulee Dam, Tuesday, 10 November
Rain. High 49°, low 41°.
0Coulee Dam, Wednesday, 11 November
Overcast. High 49°, low 43°.
0
Coulee Dam, Thursday, 12 November
Clear. High 48°, low 35°.
0.1
Coulee Dam, Friday, 13 November
Climate normal for this date — 60-year average.
0.05
Coulee 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.
0.08Coulee Dam, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.07Coulee Dam, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.04Coulee Dam, Thursday, 26 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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