Monthly outlook for Long Grove, IL: average high 61.7°, average low 49.1°. That is 5.2° above the climate normal for October. Precipitation is expected on 6 days (about 2.0 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 25 October (71.3°), the coolest 8 November (34.8°).
61.7°/49.1°
Average high / low
+5.2°
Above normal
6 / 5
Wet days / normal
2.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
25 October – 3 November
66.6°
53.5°
+7.3°
4 November – 13 November
53.5°
48.7°
+2.6°
14 November – 23 November
at normal
44.9°
—
October records over 66 years
87.4°3 October 2025All-time high
27.5°31 October 2019All-time low
Climate normals and records are computed from the nearest reference point — Highwood (10 mi).
Mon, 2666° / 47°0
66 °
Long Grove, Monday, 26 October
Overcast. High 66°, low 47°.
Pressure30.36 inHg
Wind7.5 mph NE
Humidity64%
Visibility6.2 mi
Dew point50°
Tue, 2767° / 50°0
67 °
Long Grove, Tuesday, 27 October
Mostly clear. High 67°, low 50°.
Pressure30.27 inHg
Wind6.6 mph SE
Humidity75%
Visibility6.2 mi
Dew point54°
Wed, 2870° / 54°0
70 °
Long Grove, Wednesday, 28 October
Clear. High 70°, low 54°.
Pressure30.18 inHg
Wind9.3 mph S
Humidity63%
Visibility6.2 mi
Dew point54°
Thu, 2968° / 58°0
68 °
Long Grove, Thursday, 29 October
Overcast. High 68°, low 58°.
Pressure30.09 inHg
Wind11.6 mph S
Humidity68%
Visibility—
Dew point55°
Fri, 3067° / 51°0.07
67 °
Long Grove, Friday, 30 October
Light rain. High 67°, low 51°.
Pressure30.15 inHg
Wind6 mph S
Humidity74%
Visibility—
Dew point56°
Sat, 3168° / 58°0.09
68 °
Long Grove, Saturday, 31 October
Light rain. High 68°, low 58°.
Pressure30.12 inHg
Wind7.4 mph SW
Humidity48%
Visibility—
Dew point46°
Sun, 0160° / 59°0.15
60 °
Long Grove, Sunday, 1 November
Light rain. High 60°, low 59°.
Pressure30.06 inHg
Wind9.4 mph S
Humidity91%
Visibility—
Dew point57°
Mon, 0265° / 59°0.8
65 °
Long Grove, Monday, 2 November
Rain. High 65°, low 59°.
Pressure29.80 inHg
Wind13.4 mph S
Humidity90%
Visibility—
Dew point59°
Tue, 0363° / 47°0.48
63 °
Long Grove, Tuesday, 3 November
Rain. High 63°, low 47°.
Pressure29.62 inHg
Wind17.5 mph SW
Humidity81%
Visibility—
Dew point50°
Wed, 0449° / 45°0.01
49 °
Long Grove, Wednesday, 4 November
Light rain. High 49°, low 45°.
Pressure29.77 inHg
Wind14.8 mph SW
Humidity77%
Visibility—
Dew point41°
Thu, 0555° / 42°0
55 °
Long Grove, Thursday, 5 November
Mostly clear. High 55°, low 42°.
Pressure29.94 inHg
Wind11 mph W
Humidity51%
Visibility—
Dew point34°
Fri, 0657° / 44°0
57 °
Long Grove, Friday, 6 November
Overcast. High 57°, low 44°.
Pressure29.83 inHg
Wind11.5 mph SW
Humidity50%
Visibility—
Dew point37°
Sat, 0754° / 40°0
54 °
Long Grove, Saturday, 7 November
Partly cloudy. High 54°, low 40°.
Pressure29.68 inHg
Wind13.9 mph NW
Humidity47%
Visibility—
Dew point28°
Sun, 0850° / 35°0
50 °
Long Grove, Sunday, 8 November
Overcast. High 50°, low 35°.
Pressure30.00 inHg
Wind7.2 mph E
Humidity56%
Visibility—
Dew point32°
Mon, 0956° / 46°0.39
56 °
Long Grove, Monday, 9 November
Rain. High 56°, low 46°.
Pressure29.62 inHg
Wind15.4 mph SW
Humidity86%
Visibility—
Dew point47°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 1049° / 40°0.11
49 °
Long Grove, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.11 in
Chance of precipitation37%
Record high72° (2022)
Record low18° (2017)
Wed, 1147° / 38°0.08
47 °
Long Grove, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high47°
Average low38°
Average precipitation0.08 in
Chance of precipitation33%
Record high64° (1964)
Record low16° (2019)
Thu, 1245° / 36°0.06
45 °
Long Grove, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high45°
Average low36°
Average precipitation0.06 in
Chance of precipitation20%
Record high63° (1964)
Record low7° (2019)
Fri, 1345° / 36°0.05
45 °
Long Grove, Friday, 13 November
Climate normal for this date — 60-year average.
Average high45°
Average low36°
Average precipitation0.05 in
Chance of precipitation23%
Record high63° (1999)
Record low8° (2019)
Sat, 1446° / 37°0.07
46 °
Long Grove, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high46°
Average low37°
Average precipitation0.07 in
Chance of precipitation30%
Record high64° (2025)
Record low18° (1986)
Sun, 1546° / 37°0.09
46 °
Long Grove, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high46°
Average low37°
Average precipitation0.09 in
Chance of precipitation28%
Record high69° (2025)
Record low20° (2019)
Mon, 1646° / 37°0.05
46 °
Long Grove, Monday, 16 November
Climate normal for this date — 60-year average.
Average high46°
Average low37°
Average precipitation0.05 in
Chance of precipitation18%
Record high62° (2023)
Record low24° (1997)
Tue, 1746° / 37°0.09
46 °
Long Grove, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high46°
Average low37°
Average precipitation0.09 in
Chance of precipitation25%
Record high63° (2016)
Record low18° (2014)
Wed, 1846° / 37°0.11
46 °
Long Grove, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high46°
Average low37°
Average precipitation0.11 in
Chance of precipitation28%
Record high62° (2016)
Record low15° (2014)
Thu, 1946° / 37°0.07
46 °
Long Grove, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high46°
Average low37°
Average precipitation0.07 in
Chance of precipitation32%
Record high63° (2020)
Record low16° (2018)
Fri, 2045° / 36°0.08
45 °
Long Grove, Friday, 20 November
Climate normal for this date — 60-year average.
Average high45°
Average low36°
Average precipitation0.08 in
Chance of precipitation32%
Record high59° (2003)
Record low14° (2022)
Sat, 2143° / 35°0.11
43 °
Long Grove, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high43°
Average low35°
Average precipitation0.11 in
Chance of precipitation25%
Record high61° (1990)
Record low14° (1964)
Sun, 2243° / 34°0.04
43 °
Long Grove, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high43°
Average low34°
Average precipitation0.04 in
Chance of precipitation18%
Record high61° (2010)
Record low17° (1964)
Mon, 2344° / 34°0.08
44 °
Long Grove, Monday, 23 November
Climate normal for this date — 60-year average.
Average high44°
Average low34°
Average precipitation0.08 in
Chance of precipitation27%
Record high60° (2003)
Record low15° (1970)
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 Long Grove, 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 Long Grove, 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.