Monthly outlook for Castle Rock, WA: average high 57.6°, average low 42.3°. That is 2.1° above the climate normal for October. Precipitation is expected on 7 days (about 2.4 inches), against a normal of 9 days and 4.4 inches. The warmest day looks like 5 November (68°), the coolest 31 October (34.3°).
57.6°/42.3°
Average high / low
+2.1°
Above normal
7 / 9
Wet days / normal
2.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
23 October – 1 November
55.8°
54.6°
+0.7°
2 November – 11 November
60.7°
51.9°
+4.9°
12 November – 21 November
at normal
48.8°
—
October records over 66 years
90.3°1 October 1987All-time high
23.7°30 October 2019All-time low
Climate normals and records are computed from the nearest reference point — Sightly (10 mi).
Sat, 2461° / 37°0
61 °
Castle Rock, Saturday, 24 October
Overcast. High 61°, low 37°.
Pressure30.18 inHg
Wind2.8 mph S
Humidity64%
Visibility0.4 mi
Dew point39°
Sun, 2555° / 40°0.71
55 °
Castle Rock, Sunday, 25 October
Heavy rain. High 55°, low 40°.
Pressure29.94 inHg
Wind10.5 mph S
Humidity96%
Visibility5.3 mi
Dew point47°
Mon, 2655° / 48°0.21
55 °
Castle Rock, Monday, 26 October
Rain. High 55°, low 48°.
Pressure30.03 inHg
Wind9.2 mph S
Humidity88%
Visibility6.2 mi
Dew point48°
Tue, 2756° / 50°0.16
56 °
Castle Rock, Tuesday, 27 October
Light rain. High 56°, low 50°.
Pressure30.09 inHg
Wind6.8 mph S
Humidity88%
Visibility6.2 mi
Dew point50°
Wed, 2853° / 45°0.59
53 °
Castle Rock, Wednesday, 28 October
Rain. High 53°, low 45°.
Pressure29.91 inHg
Wind10.9 mph SW
Humidity94%
Visibility—
Dew point49°
Thu, 2951° / 42°0.11
51 °
Castle Rock, Thursday, 29 October
Light rain. High 51°, low 42°.
Pressure30.03 inHg
Wind6.2 mph S
Humidity90%
Visibility—
Dew point44°
Fri, 3054° / 38°0
54 °
Castle Rock, Friday, 30 October
Partly cloudy. High 54°, low 38°.
Pressure30.03 inHg
Wind4.2 mph N
Humidity79%
Visibility—
Dew point41°
Sat, 3155° / 34°0
55 °
Castle Rock, Saturday, 31 October
Mostly clear. High 55°, low 34°.
Pressure30.03 inHg
Wind3.9 mph N
Humidity69%
Visibility—
Dew point35°
Sun, 0156° / 37°0
56 °
Castle Rock, Sunday, 1 November
Partly cloudy. High 56°, low 37°.
Pressure30.27 inHg
Wind3.9 mph S
Humidity62%
Visibility—
Dew point35°
Mon, 0258° / 39°0
58 °
Castle Rock, Monday, 2 November
Overcast. High 58°, low 39°.
Pressure30.47 inHg
Wind4.1 mph N
Humidity57%
Visibility—
Dew point34°
Tue, 0361° / 42°0
61 °
Castle Rock, Tuesday, 3 November
Overcast. High 61°, low 42°.
Pressure30.33 inHg
Wind4.7 mph SW
Humidity50%
Visibility—
Dew point34°
Wed, 0465° / 43°0
65 °
Castle Rock, Wednesday, 4 November
Partly cloudy. High 65°, low 43°.
Pressure30.18 inHg
Wind4.5 mph S
Humidity47%
Visibility—
Dew point35°
Thu, 0568° / 48°0
68 °
Castle Rock, Thursday, 5 November
Overcast. High 68°, low 48°.
Pressure29.83 inHg
Wind4.9 mph S
Humidity45%
Visibility—
Dew point36°
Fri, 0655° / 46°0.14
55 °
Castle Rock, Friday, 6 November
Light rain. High 55°, low 46°.
Pressure29.88 inHg
Wind12.2 mph SW
Humidity84%
Visibility—
Dew point50°
Sat, 0757° / 45°0.49
57 °
Castle Rock, Saturday, 7 November
Rain. High 57°, low 45°.
Pressure29.83 inHg
Wind10.4 mph S
Humidity78%
Visibility—
Dew point49°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0851° / 39°0.24
51 °
Castle Rock, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.24 in
Chance of precipitation55%
Record high66° (2016)
Record low24° (2020)
Mon, 0950° / 40°0.25
50 °
Castle Rock, Monday, 9 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.25 in
Chance of precipitation65%
Record high64° (1996)
Record low25° (2020)
Tue, 1051° / 39°0.22
51 °
Castle Rock, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.22 in
Chance of precipitation55%
Record high67° (2016)
Record low27° (1985)
Wed, 1151° / 39°0.3
51 °
Castle Rock, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.3 in
Chance of precipitation58%
Record high63° (2016)
Record low23° (1985)
Thu, 1251° / 40°0.34
51 °
Castle Rock, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.34 in
Chance of precipitation63%
Record high63° (1967)
Record low20° (1985)
Fri, 1351° / 40°0.37
51 °
Castle Rock, Friday, 13 November
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.37 in
Chance of precipitation65%
Record high64° (1967)
Record low22° (1985)
Sat, 1450° / 39°0.29
50 °
Castle Rock, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high50°
Average low39°
Average precipitation0.29 in
Chance of precipitation52%
Record high67° (1999)
Record low15° (1964)
Sun, 1550° / 39°0.3
50 °
Castle Rock, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high50°
Average low39°
Average precipitation0.3 in
Chance of precipitation63%
Record high60° (2008)
Record low20° (1964)
Mon, 1648° / 39°0.28
48 °
Castle Rock, Monday, 16 November
Climate normal for this date — 60-year average.
Average high48°
Average low39°
Average precipitation0.28 in
Chance of precipitation73%
Record high62° (1965)
Record low18° (1964)
Tue, 1749° / 38°0.35
49 °
Castle Rock, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high49°
Average low38°
Average precipitation0.35 in
Chance of precipitation72%
Record high62° (1995)
Record low25° (1964)
Wed, 1847° / 37°0.24
47 °
Castle Rock, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high47°
Average low37°
Average precipitation0.24 in
Chance of precipitation57%
Record high58° (2023)
Record low20° (1994)
Thu, 1947° / 38°0.41
47 °
Castle Rock, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high47°
Average low38°
Average precipitation0.41 in
Chance of precipitation68%
Record high60° (1987)
Record low23° (1975)
Fri, 2048° / 37°0.35
48 °
Castle Rock, Friday, 20 November
Climate normal for this date — 60-year average.
Average high48°
Average low37°
Average precipitation0.35 in
Chance of precipitation57%
Record high64° (2002)
Record low18° (1985)
Sat, 2146° / 35°0.31
46 °
Castle Rock, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.31 in
Chance of precipitation60%
Record high59° (2002)
Record low7° (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 Castle Rock, 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 Castle Rock, 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.