Monthly outlook for River Grove, IL: average high 59.6°, average low 44.5°. That is 1.6° above the climate normal for October. Precipitation is expected on 3 days (about 0.6 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 21 October (70.6°), the coolest 28 October (32°).
59.6°/44.5°
Average high / low
+1.6°
Above normal
3 / 5
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
19 October – 28 October
61.5°
57.7°
+2.1°
29 October – 7 November
56.3°
53.9°
+1.3°
8 November – 17 November
at normal
48.3°
—
October records over 66 years
89.2°3 October 2025All-time high
26.2°26 October 1962All-time low
Climate normals and records are computed from the nearest reference point — Elmwood Park (1 mi).
Tue, 2069° / 44°0
69 °
River Grove, Tuesday, 20 October
Clear. High 69°, low 44°.
Pressure30.39 inHg
Wind2.4 mph SE
Humidity56%
Visibility6.2 mi
Dew point48°
Wed, 2171° / 46°0
71 °
River Grove, Wednesday, 21 October
Clear. High 71°, low 46°.
Pressure30.27 inHg
Wind3.2 mph SW
Humidity55%
Visibility6.2 mi
Dew point48°
Thu, 2265° / 51°0.03
65 °
River Grove, Thursday, 22 October
Light rain. High 65°, low 51°.
Pressure30.30 inHg
Wind8.1 mph NE
Humidity80%
Visibility5.7 mi
Dew point58°
Fri, 2361° / 46°0
61 °
River Grove, Friday, 23 October
Clear. High 61°, low 46°.
Pressure30.39 inHg
Wind4 mph SE
Humidity71%
Visibility6.2 mi
Dew point48°
Sat, 2462° / 45°0
62 °
River Grove, Saturday, 24 October
Overcast. High 62°, low 45°.
Pressure30.42 inHg
Wind6.5 mph S
Humidity59%
Visibility—
Dew point44°
Sun, 2567° / 47°0.01
67 °
River Grove, Sunday, 25 October
Light rain. High 67°, low 47°.
Pressure30.39 inHg
Wind6.3 mph S
Humidity59%
Visibility—
Dew point47°
Mon, 2659° / 54°0
59 °
River Grove, Monday, 26 October
Overcast. High 59°, low 54°.
Pressure30.30 inHg
Wind6.7 mph NE
Humidity31%
Visibility—
Dew point28°
Tue, 2752° / 39°0.35
52 °
River Grove, Tuesday, 27 October
Rain. High 52°, low 39°.
Pressure30.24 inHg
Wind12.1 mph NW
Humidity49%
Visibility—
Dew point28°
Wed, 2842° / 32°0
42 °
River Grove, Wednesday, 28 October
Clear. High 42°, low 32°.
Pressure30.45 inHg
Wind9.7 mph NW
Humidity27%
Visibility—
Dew point8°
Thu, 2950° / 35°0
50 °
River Grove, Thursday, 29 October
Mostly clear. High 50°, low 35°.
Pressure30.21 inHg
Wind8.7 mph W
Humidity22%
Visibility—
Dew point9°
Fri, 3055° / 39°0
55 °
River Grove, Friday, 30 October
Clear. High 55°, low 39°.
Pressure30.12 inHg
Wind9.3 mph SW
Humidity31%
Visibility—
Dew point21°
Sat, 3162° / 45°0
62 °
River Grove, Saturday, 31 October
Overcast. High 62°, low 45°.
Pressure30.15 inHg
Wind8.3 mph SW
Humidity25%
Visibility—
Dew point23°
Sun, 0160° / 52°0.06
60 °
River Grove, Sunday, 1 November
Light rain. High 60°, low 52°.
Pressure30.12 inHg
Wind9 mph S
Humidity25%
Visibility—
Dew point22°
Mon, 0254° / 52°0.15
54 °
River Grove, Monday, 2 November
Light rain. High 54°, low 52°.
Pressure29.91 inHg
Wind6 mph NW
Humidity92%
Visibility—
Dew point51°
Tue, 0356° / 47°0
56 °
River Grove, Tuesday, 3 November
Partly cloudy. High 56°, low 47°.
Pressure29.94 inHg
Wind9.8 mph NW
Humidity57%
Visibility—
Dew point37°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 0453° / 42°0.09
53 °
River Grove, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.09 in
Chance of precipitation28%
Record high70° (2015)
Record low17° (1991)
Thu, 0553° / 41°0.12
53 °
River Grove, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low41°
Average precipitation0.12 in
Chance of precipitation35%
Record high74° (1978)
Record low20° (1991)
Fri, 0653° / 39°0.07
53 °
River Grove, Friday, 6 November
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.07 in
Chance of precipitation30%
Record high72° (1975)
Record low24° (1991)
Sat, 0751° / 39°0.06
51 °
River Grove, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.06 in
Chance of precipitation22%
Record high70° (2020)
Record low20° (1991)
Sun, 0851° / 39°0.06
51 °
River Grove, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.06 in
Chance of precipitation18%
Record high75° (2020)
Record low17° (1991)
Mon, 0952° / 39°0.12
52 °
River Grove, Monday, 9 November
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.12 in
Chance of precipitation37%
Record high73° (2020)
Record low20° (1991)
Tue, 1050° / 38°0.11
50 °
River Grove, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high50°
Average low38°
Average precipitation0.11 in
Chance of precipitation33%
Record high74° (2020)
Record low19° (2018)
Wed, 1148° / 36°0.08
48 °
River Grove, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high48°
Average low36°
Average precipitation0.08 in
Chance of precipitation32%
Record high70° (1964)
Record low17° (2019)
Thu, 1246° / 35°0.06
46 °
River Grove, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.06 in
Chance of precipitation23%
Record high67° (1964)
Record low3° (2019)
Fri, 1347° / 35°0.05
47 °
River Grove, Friday, 13 November
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.05 in
Chance of precipitation18%
Record high68° (1999)
Record low2° (2019)
Sat, 1448° / 35°0.07
48 °
River Grove, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.07 in
Chance of precipitation33%
Record high68° (1971)
Record low15° (1986)
Sun, 1547° / 36°0.1
47 °
River Grove, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high47°
Average low36°
Average precipitation0.1 in
Chance of precipitation28%
Record high69° (2025)
Record low20° (1982)
Mon, 1647° / 35°0.05
47 °
River Grove, Monday, 16 November
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.05 in
Chance of precipitation23%
Record high63° (2023)
Record low22° (1997)
Tue, 1747° / 36°0.09
47 °
River Grove, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high47°
Average low36°
Average precipitation0.09 in
Chance of precipitation32%
Record high69° (2016)
Record low16° (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 River 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 River 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.