Monthly outlook for Castle Rock, WA: average high 58.1°, average low 43°. That is 2.4° above the climate normal for October. Precipitation is expected on 8 days (about 3.3 inches), against a normal of 9 days and 4.4 inches. The warmest day looks like 7 November (72.2°), the coolest 1 November (32.9°).
58.1°/43°
Average high / low
+2.4°
Above normal
8 / 9
Wet days / normal
3.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
23 October – 1 November
54.9°
54.6°
+0.2°
2 November – 11 November
63.5°
51.9°
+6.4°
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
Humidity63%
Visibility—
Dew point39°
Sun, 2554° / 39°0.65
54 °
Castle Rock, Sunday, 25 October
Heavy rain. High 54°, low 39°.
Pressure29.94 inHg
Wind11.1 mph S
Humidity97%
Visibility6.2 mi
Dew point46°
Mon, 2654° / 48°0.17
54 °
Castle Rock, Monday, 26 October
Rain. High 54°, low 48°.
Pressure30.03 inHg
Wind7.9 mph S
Humidity97%
Visibility5.1 mi
Dew point49°
Tue, 2755° / 49°0.14
55 °
Castle Rock, Tuesday, 27 October
Light rain. High 55°, low 49°.
Pressure30.06 inHg
Wind5.5 mph S
Humidity92%
Visibility5.8 mi
Dew point50°
Wed, 2852° / 42°0.45
52 °
Castle Rock, Wednesday, 28 October
Rain. High 52°, low 42°.
Pressure29.97 inHg
Wind8.3 mph S
Humidity97%
Visibility—
Dew point48°
Thu, 2948° / 41°0.28
48 °
Castle Rock, Thursday, 29 October
Light rain. High 48°, low 41°.
Pressure29.88 inHg
Wind9.8 mph S
Humidity89%
Visibility—
Dew point43°
Fri, 3056° / 39°0
56 °
Castle Rock, Friday, 30 October
Partly cloudy. High 56°, low 39°.
Pressure30.12 inHg
Wind3.8 mph N
Humidity83%
Visibility—
Dew point43°
Sat, 3154° / 34°0
54 °
Castle Rock, Saturday, 31 October
Clear. High 54°, low 34°.
Pressure30.27 inHg
Wind5.1 mph N
Humidity70%
Visibility—
Dew point35°
Sun, 0155° / 33°0
55 °
Castle Rock, Sunday, 1 November
Clear. High 55°, low 33°.
Pressure30.39 inHg
Wind5.1 mph N
Humidity60%
Visibility—
Dew point31°
Mon, 0261° / 34°0
61 °
Castle Rock, Monday, 2 November
Clear. High 61°, low 34°.
Pressure30.27 inHg
Wind4 mph N
Humidity51%
Visibility—
Dew point30°
Tue, 0366° / 40°0
66 °
Castle Rock, Tuesday, 3 November
Clear. High 66°, low 40°.
Pressure30.12 inHg
Wind2.6 mph SW
Humidity41%
Visibility—
Dew point30°
Wed, 0456° / 46°0.26
56 °
Castle Rock, Wednesday, 4 November
Rain. High 56°, low 46°.
Pressure29.83 inHg
Wind4.8 mph SW
Humidity47%
Visibility—
Dew point35°
Thu, 0558° / 53°1.23
58 °
Castle Rock, Thursday, 5 November
Rain. High 58°, low 53°.
Pressure29.83 inHg
Wind9 mph S
Humidity95%
Visibility—
Dew point56°
Fri, 0669° / 56°0.14
69 °
Castle Rock, Friday, 6 November
Rain. High 69°, low 56°.
Pressure30.15 inHg
Wind6.3 mph S
Humidity87%
Visibility—
Dew point58°
Sat, 0772° / 54°0
72 °
Castle Rock, Saturday, 7 November
Clear. High 72°, low 54°.
Pressure30.18 inHg
Wind4.2 mph S
Humidity76%
Visibility—
Dew point56°
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.