Monthly outlook for Castle Rock, MN: average high 55.3°, average low 40.9°. That is 1.7° above the climate normal for October. Precipitation is expected on 3 days (about 0.9 inches), against a normal of 4 days and 1.1 inches. The warmest day looks like 24 October (72.2°), the coolest 29 October (29.6°).
55.3°/40.9°
Average high / low
+1.7°
Above normal
3 / 4
Wet days / normal
0.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
20 October – 29 October
58.6°
54°
+2.6°
30 October – 8 November
49.9°
48.5°
+0.8°
9 November – 18 November
at normal
42.5°
—
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).
Wed, 2170° / 47°0
70 °
Castle Rock, Wednesday, 21 October
Clear. High 70°, low 47°.
Pressure30.18 inHg
Wind4.5 mph W
Humidity63%
Visibility6.2 mi
Dew point52°
Thu, 2271° / 44°0
71 °
Castle Rock, Thursday, 22 October
Clear. High 71°, low 44°.
Pressure30.24 inHg
Wind5.1 mph E
Humidity71%
Visibility6.2 mi
Dew point54°
Fri, 2371° / 55°0
71 °
Castle Rock, Friday, 23 October
Overcast. High 71°, low 55°.
Pressure30.18 inHg
Wind13.5 mph S
Humidity59%
Visibility6.2 mi
Dew point53°
Sat, 2472° / 56°0.18
72 °
Castle Rock, Saturday, 24 October
Rain. High 72°, low 56°.
Pressure30.12 inHg
Wind14.5 mph S
Humidity56%
Visibility6.2 mi
Dew point52°
Sun, 2553° / 48°0.37
53 °
Castle Rock, Sunday, 25 October
Light rain. High 53°, low 48°.
Pressure30.39 inHg
Wind8.4 mph NW
Humidity61%
Visibility—
Dew point39°
Mon, 2647° / 39°0.29
47 °
Castle Rock, Monday, 26 October
Rain. High 47°, low 39°.
Pressure30.42 inHg
Wind13.6 mph NE
Humidity65%
Visibility—
Dew point33°
Tue, 2745° / 32°0.01
45 °
Castle Rock, Tuesday, 27 October
Light snow. High 45°, low 32°.
Pressure30.47 inHg
Wind10.4 mph NE
Humidity41%
Visibility—
Dew point20°
Wed, 2846° / 32°0
46 °
Castle Rock, Wednesday, 28 October
Clear. High 46°, low 32°.
Pressure30.27 inHg
Wind11.9 mph W
Humidity45%
Visibility—
Dew point23°
Thu, 2943° / 30°0
43 °
Castle Rock, Thursday, 29 October
Clear. High 43°, low 30°.
Pressure30.36 inHg
Wind11.9 mph NW
Humidity43%
Visibility—
Dew point19°
Fri, 3046° / 30°0.04
46 °
Castle Rock, Friday, 30 October
Light rain. High 46°, low 30°.
Pressure30.09 inHg
Wind19.7 mph S
Humidity35%
Visibility—
Dew point18°
Sat, 3149° / 46°0.03
49 °
Castle Rock, Saturday, 31 October
Light rain. High 49°, low 46°.
Pressure29.68 inHg
Wind19.5 mph S
Humidity84%
Visibility—
Dew point43°
Sun, 0157° / 47°0
57 °
Castle Rock, Sunday, 1 November
Overcast. High 57°, low 47°.
Pressure29.50 inHg
Wind20.8 mph S
Humidity76%
Visibility—
Dew point48°
Mon, 0250° / 38°0
50 °
Castle Rock, Monday, 2 November
Clear. High 50°, low 38°.
Pressure30.27 inHg
Wind15.7 mph NW
Humidity27%
Visibility—
Dew point13°
Tue, 0350° / 35°0
50 °
Castle Rock, Tuesday, 3 November
Overcast. High 50°, low 35°.
Pressure30.36 inHg
Wind13.7 mph S
Humidity31%
Visibility—
Dew point19°
Wed, 0447° / 34°0
47 °
Castle Rock, Wednesday, 4 November
Overcast. High 47°, low 34°.
Pressure30.42 inHg
Wind13.4 mph N
Humidity36%
Visibility—
Dew point20°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 0548° / 34°0.07
48 °
Castle Rock, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high48°
Average low34°
Average precipitation0.07 in
Chance of precipitation25%
Record high68° (2016)
Record low10° (1991)
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)
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.