Monthly outlook for Coulee Dam, WA: average high 53.3°, average low 39.1°. That is 3.3° above the climate normal for October. Precipitation is expected on 3 days (about 0.3 inches), against a normal of 5 days and 1.1 inches. The warmest day looks like 13 November (62.3°), the coolest 2 November (32.4°).
53.3°/39.1°
Average high / low
+3.3°
Above normal
3 / 5
Wet days / normal
0.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
31 October – 9 November
52.7°
48.5°
+2.3°
10 November – 19 November
54.1°
44.5°
+5.4°
20 November – 29 November
at normal
38.7°
—
October records over 66 years
86°1 October 1992All-time high
15.4°31 October 1984All-time low
Climate normals and records are computed from the nearest reference point — Grand Coulee (2 mi).
Sun, 0154° / 37°0
54 °
Coulee Dam, Sunday, 1 November
Clear. High 54°, low 37°.
Pressure30.03 inHg
Wind2.2 mph W
Humidity59%
Visibility6.2 mi
Dew point33°
Mon, 0252° / 32°0
52 °
Coulee Dam, Monday, 2 November
Mostly clear. High 52°, low 32°.
Pressure30.36 inHg
Wind4.2 mph E
Humidity70%
Visibility0.5 mi
Dew point37°
Tue, 0353° / 38°0
53 °
Coulee Dam, Tuesday, 3 November
Overcast. High 53°, low 38°.
Pressure30.21 inHg
Wind0.2 mph NW
Humidity58%
Visibility6.2 mi
Dew point34°
Wed, 0454° / 34°0
54 °
Coulee Dam, Wednesday, 4 November
Partly cloudy. High 54°, low 34°.
Pressure30.00 inHg
Wind2.4 mph W
Humidity60%
Visibility—
Dew point31°
Thu, 0553° / 38°0
53 °
Coulee Dam, Thursday, 5 November
Partly cloudy. High 53°, low 38°.
Pressure30.00 inHg
Wind4.5 mph E
Humidity67%
Visibility—
Dew point35°
Fri, 0654° / 41°0.07
54 °
Coulee Dam, Friday, 6 November
Light rain. High 54°, low 41°.
Pressure29.88 inHg
Wind10.8 mph W
Humidity66%
Visibility—
Dew point37°
Sat, 0748° / 41°0
48 °
Coulee Dam, Saturday, 7 November
Overcast. High 48°, low 41°.
Pressure30.21 inHg
Wind6.4 mph E
Humidity61%
Visibility—
Dew point33°
Sun, 0857° / 42°0
57 °
Coulee Dam, Sunday, 8 November
Overcast. High 57°, low 42°.
Pressure30.00 inHg
Wind11.3 mph S
Humidity43%
Visibility—
Dew point29°
Mon, 0953° / 37°0
53 °
Coulee Dam, Monday, 9 November
Mostly clear. High 53°, low 37°.
Pressure30.27 inHg
Wind9.5 mph SW
Humidity68%
Visibility—
Dew point36°
Tue, 1055° / 42°0
55 °
Coulee Dam, Tuesday, 10 November
Overcast. High 55°, low 42°.
Pressure30.03 inHg
Wind5.3 mph N
Humidity49%
Visibility—
Dew point30°
Wed, 1154° / 42°0
54 °
Coulee Dam, Wednesday, 11 November
Overcast. High 54°, low 42°.
Pressure29.94 inHg
Wind8.1 mph S
Humidity52%
Visibility—
Dew point32°
Thu, 1246° / 41°0.11
46 °
Coulee Dam, Thursday, 12 November
Light rain. High 46°, low 41°.
Pressure30.03 inHg
Wind6.6 mph E
Humidity72%
Visibility—
Dew point37°
Fri, 1362° / 47°0.01
62 °
Coulee Dam, Friday, 13 November
Light rain. High 62°, low 47°.
Pressure29.85 inHg
Wind18.3 mph S
Humidity66%
Visibility—
Dew point44°
Sat, 1457° / 41°0.09
57 °
Coulee Dam, Saturday, 14 November
Light rain. High 57°, low 41°.
Pressure29.74 inHg
Wind25.1 mph S
Humidity46%
Visibility—
Dew point35°
Sun, 1551° / 36°0
51 °
Coulee Dam, Sunday, 15 November
Overcast. High 51°, low 36°.
Pressure30.21 inHg
Wind5.1 mph E
Humidity59%
Visibility—
Dew point30°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 1644° / 34°0.08
44 °
Coulee Dam, Monday, 16 November
Climate normal for this date — 60-year average.
Average high44°
Average low34°
Average precipitation0.08 in
Chance of precipitation43%
Record high57° (1999)
Record low21° (2022)
Tue, 1744° / 34°0.09
44 °
Coulee Dam, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high44°
Average low34°
Average precipitation0.09 in
Chance of precipitation37%
Record high56° (1976)
Record low19° (2000)
Wed, 1843° / 32°0.05
43 °
Coulee Dam, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high43°
Average low32°
Average precipitation0.05 in
Chance of precipitation32%
Record high53° (2003)
Record low16° (1985)
Thu, 1942° / 32°0.1
42 °
Coulee Dam, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high42°
Average low32°
Average precipitation0.1 in
Chance of precipitation43%
Record high52° (2002)
Record low7° (1985)
Fri, 2042° / 32°0.09
42 °
Coulee Dam, Friday, 20 November
Climate normal for this date — 60-year average.
Average high42°
Average low32°
Average precipitation0.09 in
Chance of precipitation42%
Record high52° (1962)
Record low13° (1985)
Sat, 2140° / 31°0.09
40 °
Coulee Dam, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high40°
Average low31°
Average precipitation0.09 in
Chance of precipitation35%
Record high54° (1974)
Record low-1° (1985)
Sun, 2240° / 30°0.09
40 °
Coulee Dam, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high40°
Average low30°
Average precipitation0.09 in
Chance of precipitation35%
Record high53° (2017)
Record low4° (1985)
Mon, 2339° / 30°0.08
39 °
Coulee Dam, Monday, 23 November
Climate normal for this date — 60-year average.
Average high39°
Average low30°
Average precipitation0.08 in
Chance of precipitation45%
Record high54° (2011)
Record low-2° (1985)
Tue, 2439° / 30°0.08
39 °
Coulee Dam, Tuesday, 24 November
Climate normal for this date — 60-year average.
Average high39°
Average low30°
Average precipitation0.08 in
Chance of precipitation37%
Record high52° (2004)
Record low0° (1985)
Wed, 2538° / 29°0.07
38 °
Coulee Dam, Wednesday, 25 November
Climate normal for this date — 60-year average.
Average high38°
Average low29°
Average precipitation0.07 in
Chance of precipitation32%
Record high53° (2004)
Record low3° (1985)
Thu, 2638° / 28°0.04
38 °
Coulee Dam, Thursday, 26 November
Climate normal for this date — 60-year average.
Average high38°
Average low28°
Average precipitation0.04 in
Chance of precipitation25%
Record high51° (1998)
Record low5° (1985)
Fri, 2738° / 29°0.09
38 °
Coulee Dam, Friday, 27 November
Climate normal for this date — 60-year average.
Average high38°
Average low29°
Average precipitation0.09 in
Chance of precipitation40%
Record high53° (2014)
Record low1° (1985)
Sat, 2837° / 28°0.06
37 °
Coulee Dam, Saturday, 28 November
Climate normal for this date — 60-year average.
Average high37°
Average low28°
Average precipitation0.06 in
Chance of precipitation27%
Record high55° (2021)
Record low-11° (1985)
Sun, 2937° / 27°0.06
37 °
Coulee Dam, Sunday, 29 November
Climate normal for this date — 60-year average.
Average high37°
Average low27°
Average precipitation0.06 in
Chance of precipitation37%
Record high53° (1995)
Record low-8° (1985)
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.