Monthly outlook for Castle Rock, MN: average high 57.4°, average low 43.2°. That is 3.2° above the climate normal for October. Precipitation is expected on 6 days (about 2.7 inches), against a normal of 4 days and 1.1 inches. The warmest day looks like 22 October (72.4°), the coolest 27 October (30.4°).
57.4°/43.2°
Average high / low
+3.2°
Above normal
6 / 4
Wet days / normal
2.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
21 October – 30 October
58.4°
53.6°
+2.7°
31 October – 9 November
55.6°
47.8°
+4.3°
10 November – 19 November
at normal
42°
—
October records over 66 years
88°3 October 2025All-time high
17.8°27 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Cannon Falls (12 mi).
Thu, 2272° / 42°0
72 °
Castle Rock, Thursday, 22 October
Clear. High 72°, low 42°.
Pressure30.24 inHg
Wind4 mph E
Humidity69%
Visibility6.2 mi
Dew point56°
Fri, 2372° / 55°0.01
72 °
Castle Rock, Friday, 23 October
Light rain. High 72°, low 55°.
Pressure30.15 inHg
Wind12.5 mph S
Humidity57%
Visibility6.2 mi
Dew point53°
Sat, 2472° / 60°0.02
72 °
Castle Rock, Saturday, 24 October
Light rain. High 72°, low 60°.
Pressure30.12 inHg
Wind14.9 mph S
Humidity51%
Visibility6.2 mi
Dew point51°
Sun, 2559° / 51°0.21
59 °
Castle Rock, Sunday, 25 October
Light rain. High 59°, low 51°.
Pressure30.36 inHg
Wind8.3 mph N
Humidity82%
Visibility—
Dew point51°
Mon, 2648° / 42°0.65
48 °
Castle Rock, Monday, 26 October
Rain. High 48°, low 42°.
Pressure30.33 inHg
Wind14 mph NE
Humidity94%
Visibility—
Dew point44°
Tue, 2747° / 30°0
47 °
Castle Rock, Tuesday, 27 October
Clear. High 47°, low 30°.
Pressure30.39 inHg
Wind10 mph NE
Humidity50%
Visibility—
Dew point25°
Wed, 2848° / 37°0.31
48 °
Castle Rock, Wednesday, 28 October
Rain. High 48°, low 37°.
Pressure30.00 inHg
Wind17.7 mph NW
Humidity76%
Visibility—
Dew point40°
Thu, 2946° / 37°0.01
46 °
Castle Rock, Thursday, 29 October
Light rain. High 46°, low 37°.
Pressure30.27 inHg
Wind17.9 mph NW
Humidity51%
Visibility—
Dew point26°
Fri, 3048° / 33°0
48 °
Castle Rock, Friday, 30 October
Clear. High 48°, low 33°.
Pressure30.33 inHg
Wind7.5 mph SE
Humidity42%
Visibility—
Dew point23°
Sat, 3152° / 35°0.05
52 °
Castle Rock, Saturday, 31 October
Light rain. High 52°, low 35°.
Pressure30.09 inHg
Wind18.1 mph S
Humidity49%
Visibility—
Dew point29°
Sun, 0150° / 43°0.03
50 °
Castle Rock, Sunday, 1 November
Light rain. High 50°, low 43°.
Pressure29.97 inHg
Wind10.4 mph S
Humidity81%
Visibility—
Dew point40°
Mon, 0256° / 40°0
56 °
Castle Rock, Monday, 2 November
Mostly clear. High 56°, low 40°.
Pressure30.03 inHg
Wind7 mph SE
Humidity66%
Visibility—
Dew point40°
Tue, 0359° / 44°0
59 °
Castle Rock, Tuesday, 3 November
Overcast. High 59°, low 44°.
Pressure29.91 inHg
Wind15.2 mph SE
Humidity65%
Visibility—
Dew point44°
Wed, 0458° / 51°1.24
58 °
Castle Rock, Wednesday, 4 November
Rain. High 58°, low 51°.
Pressure29.65 inHg
Wind19.5 mph E
Humidity95%
Visibility—
Dew point54°
Thu, 0559° / 45°0.14
59 °
Castle Rock, Thursday, 5 November
Rain. High 59°, low 45°.
Pressure29.68 inHg
Wind14.7 mph W
Humidity64%
Visibility—
Dew point44°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 0647° / 35°0.07
47 °
Castle Rock, Friday, 6 November
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.07 in
Chance of precipitation25%
Record high71° (2020)
Record low3° (1991)
Sat, 0747° / 34°0.02
47 °
Castle Rock, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.02 in
Chance of precipitation8%
Record high70° (2001)
Record low-9° (1991)
Sun, 0847° / 33°0.02
47 °
Castle Rock, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high47°
Average low33°
Average precipitation0.02 in
Chance of precipitation13%
Record high72° (1999)
Record low-1° (1991)
Mon, 0946° / 33°0.13
46 °
Castle Rock, Monday, 9 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.13 in
Chance of precipitation33%
Record high71° (1999)
Record low12° (2003)
Tue, 1043° / 31°0.12
43 °
Castle Rock, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high43°
Average low31°
Average precipitation0.12 in
Chance of precipitation37%
Record high70° (2022)
Record low10° (2018)
Wed, 1142° / 29°0.06
42 °
Castle Rock, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high42°
Average low29°
Average precipitation0.06 in
Chance of precipitation22%
Record high65° (2012)
Record low9° (2019)
Thu, 1240° / 29°0.07
40 °
Castle Rock, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high40°
Average low29°
Average precipitation0.07 in
Chance of precipitation27%
Record high61° (2005)
Record low5° (2019)
Fri, 1342° / 29°0.07
42 °
Castle Rock, Friday, 13 November
Climate normal for this date — 60-year average.
Average high42°
Average low29°
Average precipitation0.07 in
Chance of precipitation25%
Record high67° (1999)
Record low4° (1986)
Sat, 1442° / 30°0.02
42 °
Castle Rock, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high42°
Average low30°
Average precipitation0.02 in
Chance of precipitation17%
Record high69° (2025)
Record low12° (2014)
Sun, 1543° / 30°0.05
43 °
Castle Rock, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high43°
Average low30°
Average precipitation0.05 in
Chance of precipitation23%
Record high65° (1990)
Record low11° (2014)
Mon, 1643° / 29°0.07
43 °
Castle Rock, Monday, 16 November
Climate normal for this date — 60-year average.
Average high43°
Average low29°
Average precipitation0.07 in
Chance of precipitation23%
Record high66° (2023)
Record low9° (1997)
Tue, 1742° / 30°0.07
42 °
Castle Rock, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high42°
Average low30°
Average precipitation0.07 in
Chance of precipitation25%
Record high67° (2001)
Record low8° (2014)
Wed, 1842° / 29°0.07
42 °
Castle Rock, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high42°
Average low29°
Average precipitation0.07 in
Chance of precipitation30%
Record high63° (1999)
Record low4° (2014)
Thu, 1941° / 29°0.09
41 °
Castle Rock, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high41°
Average low29°
Average precipitation0.09 in
Chance of precipitation27%
Record high57° (2012)
Record low7° (1986)
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, MN 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, MN 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.