Monthly outlook for Rock City, IL: average high 47.7°, average low 34.9°. That is 2.1° above the climate normal for November. Precipitation is expected on 7 days (about 3.6 inches), against a normal of 4 days and 1.3 inches. The warmest day looks like 19 November (60.1°), the coolest 25 November (24.7°).
47.7°/34.9°
Average high / low
+2.1°
Above normal
7 / 4
Wet days / normal
3.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
12 November – 21 November
49.5°
45.2°
+2.4°
22 November – 1 December
44.7°
40.2°
+2.5°
2 December – 11 December
at normal
34.8°
—
November records over 66 years
73.8°1 November 2000All-time high
-2.7°26 November 1977All-time low
Climate normals and records are computed from the nearest reference point — Freeport (12 mi).
Fri, 1340° / 31°0
40 °
Rock City, Friday, 13 November
Partly cloudy. High 40°, low 31°.
Pressure30.12 inHg
Wind12.8 mph N
Humidity66%
Visibility6.2 mi
Dew point23°
Sat, 1442° / 27°0
42 °
Rock City, Saturday, 14 November
Clear. High 42°, low 27°.
Pressure30.33 inHg
Wind5.8 mph NW
Humidity66%
Visibility6.2 mi
Dew point26°
Sun, 1545° / 27°0
45 °
Rock City, Sunday, 15 November
Clear. High 45°, low 27°.
Pressure30.47 inHg
Wind3.2 mph NW
Humidity62%
Visibility6.2 mi
Dew point29°
Mon, 1648° / 29°0
48 °
Rock City, Monday, 16 November
Clear. High 48°, low 29°.
Pressure30.47 inHg
Wind7.7 mph SW
Humidity57%
Visibility6.2 mi
Dew point31°
Tue, 1751° / 31°0
51 °
Rock City, Tuesday, 17 November
Mostly clear. High 51°, low 31°.
Pressure30.45 inHg
Wind8.6 mph S
Humidity55%
Visibility—
Dew point32°
Wed, 1856° / 39°0
56 °
Rock City, Wednesday, 18 November
Overcast. High 56°, low 39°.
Pressure30.24 inHg
Wind18.1 mph S
Humidity50%
Visibility—
Dew point34°
Thu, 1960° / 46°0.24
60 °
Rock City, Thursday, 19 November
Rain. High 60°, low 46°.
Pressure30.00 inHg
Wind19 mph SW
Humidity75%
Visibility—
Dew point47°
Fri, 2059° / 45°0
59 °
Rock City, Friday, 20 November
Overcast. High 59°, low 45°.
Pressure30.18 inHg
Wind8.9 mph NE
Humidity55%
Visibility—
Dew point41°
Sat, 2150° / 42°0.75
50 °
Rock City, Saturday, 21 November
Rain. High 50°, low 42°.
Pressure30.18 inHg
Wind15.2 mph E
Humidity92%
Visibility—
Dew point40°
Sun, 2256° / 48°0.44
56 °
Rock City, Sunday, 22 November
Light rain. High 56°, low 48°.
Pressure29.71 inHg
Wind16.3 mph SW
Humidity95%
Visibility—
Dew point53°
Mon, 2347° / 45°0.73
47 °
Rock City, Monday, 23 November
Rain. High 47°, low 45°.
Pressure29.71 inHg
Wind16 mph NE
Humidity91%
Visibility—
Dew point44°
Tue, 2452° / 33°0.59
52 °
Rock City, Tuesday, 24 November
Snow. High 52°, low 33°.
Pressure29.32 inHg
Wind26.1 mph W
Humidity79%
Visibility—
Dew point41°
Wed, 2533° / 25°0
33 °
Rock City, Wednesday, 25 November
Overcast. High 33°, low 25°.
Pressure30.18 inHg
Wind21.9 mph W
Humidity62%
Visibility—
Dew point21°
Thu, 2630° / 25°0.09
30 °
Rock City, Thursday, 26 November
Snow. High 30°, low 25°.
Pressure30.39 inHg
Wind9.4 mph W
Humidity45%
Visibility—
Dew point10°
Fri, 2751° / 28°0.8
51 °
Rock City, Friday, 27 November
Snow. High 51°, low 28°.
Pressure29.80 inHg
Wind16.3 mph S
Humidity95%
Visibility—
Dew point35°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2838° / 25°0.1
38 °
Rock City, Saturday, 28 November
Climate normal for this date — 60-year average.
Average high38°
Average low25°
Average precipitation0.1 in
Chance of precipitation27%
Record high62° (1998)
Record low2° (2018)
Sun, 2939° / 26°0.07
39 °
Rock City, Sunday, 29 November
Climate normal for this date — 60-year average.
Average high39°
Average low26°
Average precipitation0.07 in
Chance of precipitation35%
Record high65° (1998)
Record low2° (1977)
Mon, 3039° / 26°0.06
39 °
Rock City, Monday, 30 November
Climate normal for this date — 60-year average.
Average high39°
Average low26°
Average precipitation0.06 in
Chance of precipitation23%
Record high65° (1998)
Record low5° (1977)
Tue, 0137° / 25°0.11
37 °
Rock City, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high37°
Average low25°
Average precipitation0.11 in
Chance of precipitation40%
Record high59° (1970)
Record low1° (1971)
Wed, 0238° / 25°0.05
38 °
Rock City, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high38°
Average low25°
Average precipitation0.05 in
Chance of precipitation27%
Record high66° (1982)
Record low2° (1971)
Thu, 0337° / 24°0.09
37 °
Rock City, Thursday, 3 December
Climate normal for this date — 60-year average.
Average high37°
Average low24°
Average precipitation0.09 in
Chance of precipitation30%
Record high66° (2012)
Record low-10° (1985)
Fri, 0436° / 24°0.06
36 °
Rock City, Friday, 4 December
Climate normal for this date — 60-year average.
Average high36°
Average low24°
Average precipitation0.06 in
Chance of precipitation20%
Record high64° (1998)
Record low-5° (2025)
Sat, 0537° / 24°0.07
37 °
Rock City, Saturday, 5 December
Climate normal for this date — 60-year average.
Average high37°
Average low24°
Average precipitation0.07 in
Chance of precipitation32%
Record high65° (2001)
Record low-2° (1991)
Sun, 0635° / 22°0.05
35 °
Rock City, Sunday, 6 December
Climate normal for this date — 60-year average.
Average high35°
Average low22°
Average precipitation0.05 in
Chance of precipitation27%
Record high59° (1998)
Record low-6° (2007)
Mon, 0733° / 21°0.09
33 °
Rock City, Monday, 7 December
Climate normal for this date — 60-year average.
Average high33°
Average low21°
Average precipitation0.09 in
Chance of precipitation27%
Record high53° (1980)
Record low-5° (2005)
Tue, 0833° / 22°0.07
33 °
Rock City, Tuesday, 8 December
Climate normal for this date — 60-year average.
Average high33°
Average low22°
Average precipitation0.07 in
Chance of precipitation32%
Record high56° (1991)
Record low-2° (2025)
Wed, 0934° / 20°0.08
34 °
Rock City, Wednesday, 9 December
Climate normal for this date — 60-year average.
Average high34°
Average low20°
Average precipitation0.08 in
Chance of precipitation32%
Record high51° (1987)
Record low-8° (1978)
Thu, 1033° / 20°0.07
33 °
Rock City, Thursday, 10 December
Climate normal for this date — 60-year average.
Average high33°
Average low20°
Average precipitation0.07 in
Chance of precipitation25%
Record high56° (2015)
Record low-13° (1978)
Fri, 1132° / 19°0.09
32 °
Rock City, Friday, 11 December
Climate normal for this date — 60-year average.
Average high32°
Average low19°
Average precipitation0.09 in
Chance of precipitation32%
Record high55° (1965)
Record low-16° (1972)
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 Rock City, IL 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 Rock City, IL 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.