Monthly outlook for Custer, WA: average high 58.7°, average low 44.6°. That is 0.7° above the climate normal for October. Precipitation is expected on 4 days (about 1.5 inches), against a normal of 8 days and 3.3 inches. The warmest day looks like 8 October (66.9°), the coolest 12 October (39.4°).
58.7°/44.6°
Average high / low
+0.7°
Above normal
4 / 8
Wet days / normal
1.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
7 October – 16 October
58.9°
58.4°
+0.3°
17 October – 26 October
58.3°
55.2°
+1.7°
27 October – 5 November
at normal
51.9°
—
October records over 66 years
81.1°1 October 1987All-time high
21.6°31 October 1984All-time low
Climate normals and records are computed from the nearest reference point — Bellingham (13 mi).
Thu, 0867° / 54°0
67 °
Custer, Thursday, 8 October
Overcast. High 67°, low 54°.
Pressure30.06 inHg
Wind1.3 mph S
Humidity77%
Visibility6.2 mi
Dew point54°
Fri, 0959° / 52°0.28
59 °
Custer, Friday, 9 October
Rain. High 59°, low 52°.
Pressure29.71 inHg
Wind16 mph W
Humidity59%
Visibility6.2 mi
Dew point43°
Sat, 1059° / 48°0.34
59 °
Custer, Saturday, 10 October
Rain. High 59°, low 48°.
Pressure29.88 inHg
Wind5.5 mph NW
Humidity72%
Visibility6.2 mi
Dew point48°
Sun, 1162° / 45°0
62 °
Custer, Sunday, 11 October
Clear. High 62°, low 45°.
Pressure30.12 inHg
Wind9.6 mph NE
Humidity54%
Visibility—
Dew point39°
Mon, 1260° / 39°0
60 °
Custer, Monday, 12 October
Clear. High 60°, low 39°.
Pressure30.12 inHg
Wind4.1 mph NE
Humidity69%
Visibility—
Dew point42°
Tue, 1349° / 43°0.86
49 °
Custer, Tuesday, 13 October
Rain. High 49°, low 43°.
Pressure29.88 inHg
Wind10.5 mph SE
Humidity79%
Visibility—
Dew point40°
Wed, 1453° / 44°0.06
53 °
Custer, Wednesday, 14 October
Light rain. High 53°, low 44°.
Pressure30.00 inHg
Wind7.9 mph NW
Humidity90%
Visibility—
Dew point46°
Thu, 1556° / 40°0
56 °
Custer, Thursday, 15 October
Clear. High 56°, low 40°.
Pressure30.36 inHg
Wind5.4 mph NW
Humidity67%
Visibility—
Dew point38°
Fri, 1659° / 39°0
59 °
Custer, Friday, 16 October
Clear. High 59°, low 39°.
Pressure30.30 inHg
Wind7.3 mph NW
Humidity52%
Visibility—
Dew point33°
Sat, 1760° / 41°0
60 °
Custer, Saturday, 17 October
Clear. High 60°, low 41°.
Pressure30.03 inHg
Wind5.4 mph W
Humidity50%
Visibility—
Dew point33°
Sun, 1860° / 43°0
60 °
Custer, Sunday, 18 October
Clear. High 60°, low 43°.
Pressure29.97 inHg
Wind3.7 mph NE
Humidity52%
Visibility—
Dew point36°
Mon, 1956° / 43°0
56 °
Custer, Monday, 19 October
Clear. High 56°, low 43°.
Pressure30.06 inHg
Wind5.6 mph W
Humidity66%
Visibility—
Dew point41°
Tue, 2058° / 42°0
58 °
Custer, Tuesday, 20 October
Clear. High 58°, low 42°.
Pressure30.24 inHg
Wind4.3 mph W
Humidity53%
Visibility—
Dew point35°
Wed, 2157° / 43°0
57 °
Custer, Wednesday, 21 October
Overcast. High 57°, low 43°.
Pressure30.18 inHg
Wind4.6 mph NW
Humidity55%
Visibility—
Dew point36°
Thu, 2259° / 46°0
59 °
Custer, Thursday, 22 October
Overcast. High 59°, low 46°.
Pressure30.00 inHg
Wind4.4 mph E
Humidity50%
Visibility—
Dew point35°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 2355° / 44°0.2
55 °
Custer, Friday, 23 October
Climate normal for this date — 60-year average.
Average high55°
Average low44°
Average precipitation0.2 in
Chance of precipitation53%
Record high69° (2007)
Record low35° (1975)
Sat, 2454° / 44°0.2
54 °
Custer, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high54°
Average low44°
Average precipitation0.2 in
Chance of precipitation62%
Record high67° (1965)
Record low36° (1997)
Sun, 2554° / 44°0.24
54 °
Custer, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high54°
Average low44°
Average precipitation0.24 in
Chance of precipitation62%
Record high65° (1965)
Record low31° (2020)
Mon, 2653° / 43°0.28
53 °
Custer, Monday, 26 October
Climate normal for this date — 60-year average.
Average high53°
Average low43°
Average precipitation0.28 in
Chance of precipitation52%
Record high67° (1965)
Record low32° (1970)
Tue, 2753° / 43°0.23
53 °
Custer, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high53°
Average low43°
Average precipitation0.23 in
Chance of precipitation47%
Record high64° (1968)
Record low30° (1971)
Wed, 2853° / 44°0.31
53 °
Custer, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high53°
Average low44°
Average precipitation0.31 in
Chance of precipitation62%
Record high67° (1962)
Record low30° (1971)
Thu, 2952° / 42°0.2
52 °
Custer, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high52°
Average low42°
Average precipitation0.2 in
Chance of precipitation53%
Record high67° (1962)
Record low29° (1991)
Fri, 3052° / 42°0.27
52 °
Custer, Friday, 30 October
Climate normal for this date — 60-year average.
Average high52°
Average low42°
Average precipitation0.27 in
Chance of precipitation57%
Record high61° (1987)
Record low31° (1972)
Sat, 3151° / 42°0.33
51 °
Custer, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high51°
Average low42°
Average precipitation0.33 in
Chance of precipitation67%
Record high61° (1964)
Record low22° (1984)
Sun, 0152° / 41°0.25
52 °
Custer, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high52°
Average low41°
Average precipitation0.25 in
Chance of precipitation50%
Record high65° (1969)
Record low31° (1984)
Mon, 0252° / 41°0.27
52 °
Custer, Monday, 2 November
Climate normal for this date — 60-year average.
Average high52°
Average low41°
Average precipitation0.27 in
Chance of precipitation58%
Record high65° (1962)
Record low31° (1961)
Tue, 0351° / 42°0.33
51 °
Custer, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high51°
Average low42°
Average precipitation0.33 in
Chance of precipitation63%
Record high64° (2010)
Record low29° (2017)
Wed, 0452° / 42°0.38
52 °
Custer, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high52°
Average low42°
Average precipitation0.38 in
Chance of precipitation62%
Record high65° (1980)
Record low30° (2017)
Thu, 0551° / 41°0.22
51 °
Custer, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.22 in
Chance of precipitation65%
Record high64° (1980)
Record low28° (1971)
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 Custer, 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 Custer, 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.