Monthly outlook for Coulee Dam, WA: average high 47.3°, average low 34.2°. That is 2.9° above the climate normal for November. Precipitation is expected on 1 day (about 0.4 inches), against a normal of 6 days and 1.2 inches. The warmest day looks like 13 November (60°), the coolest 23 November (27.2°).
47.3°/34.2°
Average high / low
+2.9°
Above normal
1 / 6
Wet days / normal
0.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 November – 20 November
49.9°
44.1°
+3.2°
21 November – 30 November
43°
38.2°
+2.7°
1 December – 10 December
at normal
35.3°
—
November records over 66 years
63°1 November 1988All-time high
-10.8°28 November 1985All-time low
Climate normals and records are computed from the nearest reference point — Grand Coulee (2 mi).
Thu, 1257° / 44°0
57 °
Coulee Dam, Thursday, 12 November
Overcast. High 57°, low 44°.
Pressure29.88 inHg
Wind0.8 mph NE
Humidity78%
Visibility6.2 mi
Dew point44°
Fri, 1360° / 37°0
60 °
Coulee Dam, Friday, 13 November
Overcast. High 60°, low 37°.
Pressure29.41 inHg
Wind5 mph E
Humidity52%
Visibility6.2 mi
Dew point41°
Sat, 1452° / 40°0
52 °
Coulee Dam, Saturday, 14 November
Clear. High 52°, low 40°.
Pressure29.77 inHg
Wind10.6 mph S
Humidity66%
Visibility6.2 mi
Dew point40°
Sun, 1545° / 41°0.42
45 °
Coulee Dam, Sunday, 15 November
Rain. High 45°, low 41°.
Pressure29.85 inHg
Wind6.5 mph SE
Humidity90%
Visibility2.5 mi
Dew point42°
Mon, 1644° / 35°0
44 °
Coulee Dam, Monday, 16 November
Light rain. High 44°, low 35°.
Pressure30.00 inHg
Wind4.2 mph SW
Humidity94%
Visibility—
Dew point40°
Tue, 1747° / 33°0
47 °
Coulee Dam, Tuesday, 17 November
Mostly clear. High 47°, low 33°.
Pressure30.15 inHg
Wind3.8 mph NE
Humidity75%
Visibility—
Dew point33°
Wed, 1845° / 34°0
45 °
Coulee Dam, Wednesday, 18 November
Overcast. High 45°, low 34°.
Pressure29.97 inHg
Wind4.4 mph NE
Humidity70%
Visibility—
Dew point31°
Thu, 1946° / 33°0
46 °
Coulee Dam, Thursday, 19 November
Overcast. High 46°, low 33°.
Pressure30.09 inHg
Wind4.4 mph N
Humidity66%
Visibility—
Dew point29°
Fri, 2047° / 30°0
47 °
Coulee Dam, Friday, 20 November
Clear. High 47°, low 30°.
Pressure30.30 inHg
Wind5 mph NW
Humidity52%
Visibility—
Dew point23°
Sat, 2146° / 30°0
46 °
Coulee Dam, Saturday, 21 November
Mostly clear. High 46°, low 30°.
Pressure30.30 inHg
Wind5.1 mph N
Humidity44%
Visibility—
Dew point19°
Sun, 2244° / 29°0
44 °
Coulee Dam, Sunday, 22 November
Overcast. High 44°, low 29°.
Pressure30.27 inHg
Wind3.1 mph NE
Humidity46%
Visibility—
Dew point19°
Mon, 2343° / 27°0
43 °
Coulee Dam, Monday, 23 November
Clear. High 43°, low 27°.
Pressure30.36 inHg
Wind4 mph NE
Humidity52%
Visibility—
Dew point20°
Tue, 2441° / 28°0
41 °
Coulee Dam, Tuesday, 24 November
Overcast. High 41°, low 28°.
Pressure30.36 inHg
Wind4.1 mph NE
Humidity56%
Visibility—
Dew point22°
Wed, 2543° / 31°0
43 °
Coulee Dam, Wednesday, 25 November
Overcast. High 43°, low 31°.
Pressure30.24 inHg
Wind3.6 mph E
Humidity59%
Visibility—
Dew point25°
Thu, 2641° / 31°0
41 °
Coulee Dam, Thursday, 26 November
Overcast. High 41°, low 31°.
Pressure30.42 inHg
Wind4.6 mph NE
Humidity83%
Visibility—
Dew point32°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Mon, 3037° / 28°0.09
37 °
Coulee Dam, Monday, 30 November
Climate normal for this date — 60-year average.
Average high37°
Average low28°
Average precipitation0.09 in
Chance of precipitation38%
Record high53° (2021)
Record low2° (1985)
Tue, 0137° / 28°0.11
37 °
Coulee Dam, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high37°
Average low28°
Average precipitation0.11 in
Chance of precipitation47%
Record high61° (2021)
Record low-10° (1985)
Wed, 0237° / 28°0.11
37 °
Coulee Dam, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high37°
Average low28°
Average precipitation0.11 in
Chance of precipitation45%
Record high55° (2021)
Record low-2° (1985)
Thu, 0337° / 28°0.1
37 °
Coulee Dam, Thursday, 3 December
Climate normal for this date — 60-year average.
Average high37°
Average low28°
Average precipitation0.1 in
Chance of precipitation40%
Record high50° (2007)
Record low6° (1984)
Fri, 0436° / 26°0.08
36 °
Coulee Dam, Friday, 4 December
Climate normal for this date — 60-year average.
Average high36°
Average low26°
Average precipitation0.08 in
Chance of precipitation35%
Record high54° (2007)
Record low7° (1994)
Sat, 0535° / 26°0.06
35 °
Coulee Dam, Saturday, 5 December
Climate normal for this date — 60-year average.
Average high35°
Average low26°
Average precipitation0.06 in
Chance of precipitation33%
Record high47° (2012)
Record low9° (1984)
Sun, 0635° / 26°0.09
35 °
Coulee Dam, Sunday, 6 December
Climate normal for this date — 60-year average.
Average high35°
Average low26°
Average precipitation0.09 in
Chance of precipitation35%
Record high50° (1987)
Record low10° (1992)
Mon, 0734° / 25°0.07
34 °
Coulee Dam, Monday, 7 December
Climate normal for this date — 60-year average.
Average high34°
Average low25°
Average precipitation0.07 in
Chance of precipitation33%
Record high47° (1987)
Record low8° (1971)
Tue, 0834° / 25°0.08
34 °
Coulee Dam, Tuesday, 8 December
Climate normal for this date — 60-year average.
Average high34°
Average low25°
Average precipitation0.08 in
Chance of precipitation30%
Record high54° (2015)
Record low5° (1972)
Wed, 0934° / 26°0.08
34 °
Coulee Dam, Wednesday, 9 December
Climate normal for this date — 60-year average.
Average high34°
Average low26°
Average precipitation0.08 in
Chance of precipitation38%
Record high51° (2015)
Record low8° (1972)
Thu, 1036° / 26°0.11
36 °
Coulee Dam, Thursday, 10 December
Climate normal for this date — 60-year average.
Average high36°
Average low26°
Average precipitation0.11 in
Chance of precipitation50%
Record high53° (2025)
Record low3° (1961)
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.