Monthly outlook for Castle Rock, MN: average high 57.6°, average low 40.6°. That is 2.7° above the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 4 days and 1.1 inches. The warmest day looks like 22 October (70.1°), the coolest 28 October (24.2°).
57.6°/40.6°
Average high / low
+2.7°
Above normal
0 / 4
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
19 October – 28 October
60°
54.4°
+3.2°
29 October – 7 November
53.4°
49°
+2.4°
8 November – 17 November
at normal
42.9°
—
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).
Tue, 2069° / 43°0
69 °
Castle Rock, Tuesday, 20 October
Clear. High 69°, low 43°.
Pressure30.30 inHg
Wind9.4 mph S
Humidity52%
Visibility6.2 mi
Dew point46°
Wed, 2167° / 47°0
67 °
Castle Rock, Wednesday, 21 October
Clear. High 67°, low 47°.
Pressure30.21 inHg
Wind4.6 mph SW
Humidity63%
Visibility6.2 mi
Dew point51°
Thu, 2270° / 49°0
70 °
Castle Rock, Thursday, 22 October
Partly cloudy. High 70°, low 49°.
Pressure30.27 inHg
Wind7.6 mph SE
Humidity65%
Visibility6.2 mi
Dew point54°
Fri, 2365° / 53°0.02
65 °
Castle Rock, Friday, 23 October
Light rain. High 65°, low 53°.
Pressure30.21 inHg
Wind13.2 mph SE
Humidity68%
Visibility6.2 mi
Dew point52°
Sat, 2467° / 56°0
67 °
Castle Rock, Saturday, 24 October
Partly cloudy. High 67°, low 56°.
Pressure30.18 inHg
Wind14.7 mph S
Humidity55%
Visibility—
Dew point46°
Sun, 2563° / 50°0
63 °
Castle Rock, Sunday, 25 October
Light rain. High 63°, low 50°.
Pressure30.24 inHg
Wind14.9 mph W
Humidity29%
Visibility—
Dew point28°
Mon, 2649° / 36°0
49 °
Castle Rock, Monday, 26 October
Clear. High 49°, low 36°.
Pressure30.42 inHg
Wind10.8 mph NW
Humidity34%
Visibility—
Dew point18°
Tue, 2743° / 32°0
43 °
Castle Rock, Tuesday, 27 October
Overcast. High 43°, low 32°.
Pressure30.56 inHg
Wind13 mph N
Humidity31%
Visibility—
Dew point11°
Wed, 2842° / 24°0
42 °
Castle Rock, Wednesday, 28 October
Partly cloudy. High 42°, low 24°.
Pressure30.56 inHg
Wind11.8 mph NW
Humidity29%
Visibility—
Dew point7°
Thu, 2949° / 27°0
49 °
Castle Rock, Thursday, 29 October
Clear. High 49°, low 27°.
Pressure30.36 inHg
Wind11.7 mph S
Humidity23%
Visibility—
Dew point8°
Fri, 3057° / 39°0
57 °
Castle Rock, Friday, 30 October
Clear. High 57°, low 39°.
Pressure29.94 inHg
Wind16.8 mph SW
Humidity48%
Visibility—
Dew point33°
Sat, 3163° / 43°0
63 °
Castle Rock, Saturday, 31 October
Overcast. High 63°, low 43°.
Pressure29.85 inHg
Wind12 mph SW
Humidity48%
Visibility—
Dew point39°
Sun, 0149° / 41°0
49 °
Castle Rock, Sunday, 1 November
Overcast. High 49°, low 41°.
Pressure30.21 inHg
Wind11.3 mph NE
Humidity37%
Visibility—
Dew point22°
Mon, 0250° / 36°0
50 °
Castle Rock, Monday, 2 November
Overcast. High 50°, low 36°.
Pressure30.33 inHg
Wind7 mph NE
Humidity37%
Visibility—
Dew point21°
Tue, 0353° / 35°0
53 °
Castle Rock, Tuesday, 3 November
Light rain. High 53°, low 35°.
Pressure30.00 inHg
Wind17.9 mph S
Humidity45%
Visibility—
Dew point28°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 0447° / 34°0.05
47 °
Castle Rock, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.05 in
Chance of precipitation23%
Record high70° (2008)
Record low-2° (1991)
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)
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.