Monthly outlook for Chimacum, WA: average high 55.3°, average low 44.8°. That is 0.4° above the climate normal for October. Precipitation is expected on 5 days (about 0.5 inches), against a normal of 9 days and 3.4 inches. The warmest day looks like 17 October (65.8°), the coolest 29 October (40°).
55.3°/44.8°
Average high / low
+0.4°
Above normal
5 / 9
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
17 October – 26 October
56.8°
55.5°
+0.7°
27 October – 5 November
52.7°
52.5°
+0.1°
6 November – 15 November
at normal
50.3°
—
October records over 66 years
81.9°16 October 2022All-time high
30.6°31 October 1984All-time low
Climate normals and records are computed from the nearest reference point — Marrowstone (5 mi).
Sun, 1861° / 42°0
61 °
Chimacum, Sunday, 18 October
Overcast. High 61°, low 42°.
Pressure30.18 inHg
Wind8.8 mph NW
Humidity82%
Visibility2.5 mi
Dew point47°
Mon, 1955° / 49°0
55 °
Chimacum, Monday, 19 October
Overcast. High 55°, low 49°.
Pressure29.97 inHg
Wind2.1 mph N
Humidity69%
Visibility6.2 mi
Dew point45°
Tue, 2055° / 49°0
55 °
Chimacum, Tuesday, 20 October
Partly cloudy. High 55°, low 49°.
Pressure30.09 inHg
Wind11.2 mph NW
Humidity78%
Visibility6.2 mi
Dew point47°
Wed, 2158° / 50°0
58 °
Chimacum, Wednesday, 21 October
Clear. High 58°, low 50°.
Pressure30.00 inHg
Wind6.4 mph NW
Humidity64%
Visibility—
Dew point43°
Thu, 2255° / 47°0.09
55 °
Chimacum, Thursday, 22 October
Light rain. High 55°, low 47°.
Pressure29.97 inHg
Wind9 mph W
Humidity82%
Visibility—
Dew point47°
Fri, 2355° / 43°0
55 °
Chimacum, Friday, 23 October
Overcast. High 55°, low 43°.
Pressure30.24 inHg
Wind3.7 mph NE
Humidity79%
Visibility—
Dew point43°
Sat, 2455° / 41°0
55 °
Chimacum, Saturday, 24 October
Overcast. High 55°, low 41°.
Pressure30.21 inHg
Wind5.9 mph SE
Humidity68%
Visibility—
Dew point39°
Sun, 2556° / 46°0.03
56 °
Chimacum, Sunday, 25 October
Light rain. High 56°, low 46°.
Pressure30.06 inHg
Wind12.4 mph SE
Humidity83%
Visibility—
Dew point44°
Mon, 2652° / 45°0.09
52 °
Chimacum, Monday, 26 October
Light rain. High 52°, low 45°.
Pressure29.91 inHg
Wind11.7 mph S
Humidity87%
Visibility—
Dew point47°
Tue, 2753° / 43°0.07
53 °
Chimacum, Tuesday, 27 October
Light rain. High 53°, low 43°.
Pressure29.97 inHg
Wind7.5 mph SE
Humidity83%
Visibility—
Dew point43°
Wed, 2847° / 45°0.13
47 °
Chimacum, Wednesday, 28 October
Light rain. High 47°, low 45°.
Pressure29.71 inHg
Wind17 mph S
Humidity94%
Visibility—
Dew point44°
Thu, 2953° / 40°0
53 °
Chimacum, Thursday, 29 October
Mostly clear. High 53°, low 40°.
Pressure30.03 inHg
Wind6.2 mph SE
Humidity81%
Visibility—
Dew point41°
Fri, 3055° / 42°0
55 °
Chimacum, Friday, 30 October
Overcast. High 55°, low 42°.
Pressure30.03 inHg
Wind7 mph N
Humidity70%
Visibility—
Dew point38°
Sat, 3156° / 43°0
56 °
Chimacum, Saturday, 31 October
Overcast. High 56°, low 43°.
Pressure30.21 inHg
Wind7.5 mph SE
Humidity79%
Visibility—
Dew point43°
Sun, 0153° / 44°0
53 °
Chimacum, Sunday, 1 November
Overcast. High 53°, low 44°.
Pressure30.09 inHg
Wind5.8 mph S
Humidity72%
Visibility—
Dew point40°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0252° / 44°0.19
52 °
Chimacum, Monday, 2 November
Climate normal for this date — 60-year average.
Average high52°
Average low44°
Average precipitation0.19 in
Chance of precipitation55%
Record high64° (1962)
Record low35° (2002)
Tue, 0352° / 44°0.23
52 °
Chimacum, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high52°
Average low44°
Average precipitation0.23 in
Chance of precipitation65%
Record high62° (2010)
Record low34° (2017)
Wed, 0453° / 45°0.26
53 °
Chimacum, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high53°
Average low45°
Average precipitation0.26 in
Chance of precipitation60%
Record high64° (1980)
Record low34° (2003)
Thu, 0552° / 44°0.21
52 °
Chimacum, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high52°
Average low44°
Average precipitation0.21 in
Chance of precipitation70%
Record high61° (1980)
Record low31° (1971)
Fri, 0651° / 44°0.24
51 °
Chimacum, Friday, 6 November
Climate normal for this date — 60-year average.
Average high51°
Average low44°
Average precipitation0.24 in
Chance of precipitation65%
Record high60° (2014)
Record low32° (2003)
Sat, 0751° / 44°0.23
51 °
Chimacum, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high51°
Average low44°
Average precipitation0.23 in
Chance of precipitation67%
Record high58° (1976)
Record low33° (2003)
Sun, 0851° / 44°0.22
51 °
Chimacum, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high51°
Average low44°
Average precipitation0.22 in
Chance of precipitation63%
Record high64° (2016)
Record low35° (2022)
Mon, 0950° / 44°0.22
50 °
Chimacum, Monday, 9 November
Climate normal for this date — 60-year average.
Average high50°
Average low44°
Average precipitation0.22 in
Chance of precipitation62%
Record high64° (2025)
Record low35° (1986)
Tue, 1050° / 43°0.17
50 °
Chimacum, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high50°
Average low43°
Average precipitation0.17 in
Chance of precipitation50%
Record high61° (2016)
Record low31° (1986)
Wed, 1150° / 44°0.24
50 °
Chimacum, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high50°
Average low44°
Average precipitation0.24 in
Chance of precipitation58%
Record high59° (1990)
Record low30° (1985)
Thu, 1250° / 43°0.26
50 °
Chimacum, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high50°
Average low43°
Average precipitation0.26 in
Chance of precipitation68%
Record high58° (2016)
Record low30° (1985)
Fri, 1350° / 43°0.3
50 °
Chimacum, Friday, 13 November
Climate normal for this date — 60-year average.
Average high50°
Average low43°
Average precipitation0.3 in
Chance of precipitation65%
Record high60° (1967)
Record low32° (1985)
Sat, 1450° / 42°0.26
50 °
Chimacum, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high50°
Average low42°
Average precipitation0.26 in
Chance of precipitation57%
Record high61° (1969)
Record low31° (1964)
Sun, 1549° / 42°0.28
49 °
Chimacum, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high49°
Average low42°
Average precipitation0.28 in
Chance of precipitation67%
Record high57° (2001)
Record low33° (2014)
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 Chimacum, 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 Chimacum, 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.