Monthly outlook for Forest River, IL: average high 64.7°, average low 52.8°. That is 2.9° above the climate normal for October. Precipitation is expected on 5 days (about 3.9 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 12 October (84.9°), the coolest 17 October (38.5°).
64.7°/52.8°
Average high / low
+2.9°
Above normal
5 / 5
Wet days / normal
3.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
65.9°
60.5°
+3°
21 October – 30 October
62.6°
56.9°
+3.2°
31 October – 9 November
at normal
52.7°
—
October records over 66 years
88.2°3 October 2025All-time high
26.2°31 October 2023All-time low
Climate normals and records are computed from the nearest reference point — Park Ridge (5 mi).
Mon, 1285° / 64°0
85 °
Forest River, Monday, 12 October
Mostly clear. High 85°, low 64°.
Pressure29.83 inHg
Wind10.6 mph SW
Humidity64%
Visibility6.2 mi
Dew point64°
Tue, 1379° / 65°0
79 °
Forest River, Tuesday, 13 October
Clear. High 79°, low 65°.
Pressure29.80 inHg
Wind9.8 mph W
Humidity69%
Visibility6.2 mi
Dew point67°
Wed, 1467° / 59°0.13
67 °
Forest River, Wednesday, 14 October
Rain. High 67°, low 59°.
Pressure30.09 inHg
Wind7.7 mph NE
Humidity80%
Visibility6.2 mi
Dew point61°
Thu, 1560° / 57°1.79
60 °
Forest River, Thursday, 15 October
Heavy rain. High 60°, low 57°.
Pressure30.06 inHg
Wind7 mph E
Humidity97%
Visibility1.1 mi
Dew point57°
Fri, 1657° / 47°0.02
57 °
Forest River, Friday, 16 October
Light rain. High 57°, low 47°.
Pressure30.42 inHg
Wind16.9 mph N
Humidity48%
Visibility—
Dew point37°
Sat, 1749° / 39°0
49 °
Forest River, Saturday, 17 October
Clear. High 49°, low 39°.
Pressure30.59 inHg
Wind5.5 mph NW
Humidity33%
Visibility—
Dew point19°
Sun, 1857° / 40°0
57 °
Forest River, Sunday, 18 October
Clear. High 57°, low 40°.
Pressure30.42 inHg
Wind15.2 mph SW
Humidity32%
Visibility—
Dew point24°
Mon, 1964° / 48°0
64 °
Forest River, Monday, 19 October
Clear. High 64°, low 48°.
Pressure30.36 inHg
Wind12.4 mph SW
Humidity29%
Visibility—
Dew point27°
Tue, 2065° / 53°0
65 °
Forest River, Tuesday, 20 October
Overcast. High 65°, low 53°.
Pressure30.33 inHg
Wind6.3 mph S
Humidity26%
Visibility—
Dew point26°
Wed, 2169° / 58°0
69 °
Forest River, Wednesday, 21 October
Overcast. High 69°, low 58°.
Pressure30.18 inHg
Wind12.3 mph S
Humidity40%
Visibility—
Dew point42°
Thu, 2273° / 62°0.08
73 °
Forest River, Thursday, 22 October
Light rain. High 73°, low 62°.
Pressure30.21 inHg
Wind11.8 mph SW
Humidity56%
Visibility—
Dew point55°
Fri, 2364° / 61°1.12
64 °
Forest River, Friday, 23 October
Rain. High 64°, low 61°.
Pressure30.06 inHg
Wind11.5 mph S
Humidity85%
Visibility—
Dew point58°
Sat, 2462° / 50°0.78
62 °
Forest River, Saturday, 24 October
Rain. High 62°, low 50°.
Pressure30.00 inHg
Wind8.9 mph NW
Humidity86%
Visibility—
Dew point52°
Sun, 2554° / 47°0
54 °
Forest River, Sunday, 25 October
Overcast. High 54°, low 47°.
Pressure30.12 inHg
Wind9.1 mph NW
Humidity46%
Visibility—
Dew point31°
Mon, 2654° / 41°0
54 °
Forest River, Monday, 26 October
Clear. High 54°, low 41°.
Pressure29.91 inHg
Wind13.9 mph NW
Humidity47%
Visibility—
Dew point33°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2756° / 44°0.09
56 °
Forest River, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high56°
Average low44°
Average precipitation0.09 in
Chance of precipitation33%
Record high74° (2014)
Record low31° (1980)
Wed, 2855° / 44°0.05
55 °
Forest River, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high55°
Average low44°
Average precipitation0.05 in
Chance of precipitation20%
Record high72° (1999)
Record low29° (1976)
Thu, 2955° / 43°0.06
55 °
Forest River, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high55°
Average low43°
Average precipitation0.06 in
Chance of precipitation22%
Record high79° (2024)
Record low30° (1988)
Fri, 3057° / 44°0.11
57 °
Forest River, Friday, 30 October
Climate normal for this date — 60-year average.
Average high57°
Average low44°
Average precipitation0.11 in
Chance of precipitation30%
Record high77° (2024)
Record low29° (2020)
Sat, 3156° / 44°0.14
56 °
Forest River, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high56°
Average low44°
Average precipitation0.14 in
Chance of precipitation40%
Record high72° (1974)
Record low26° (2023)
Sun, 0155° / 43°0.16
55 °
Forest River, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high55°
Average low43°
Average precipitation0.16 in
Chance of precipitation43%
Record high72° (2016)
Record low18° (2019)
Mon, 0254° / 42°0.12
54 °
Forest River, Monday, 2 November
Climate normal for this date — 60-year average.
Average high54°
Average low42°
Average precipitation0.12 in
Chance of precipitation38%
Record high73° (1961)
Record low24° (1991)
Tue, 0353° / 41°0.06
53 °
Forest River, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high53°
Average low41°
Average precipitation0.06 in
Chance of precipitation22%
Record high71° (1987)
Record low18° (1991)
Wed, 0452° / 42°0.09
52 °
Forest River, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high52°
Average low42°
Average precipitation0.09 in
Chance of precipitation27%
Record high70° (2022)
Record low17° (1991)
Thu, 0553° / 41°0.13
53 °
Forest River, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low41°
Average precipitation0.13 in
Chance of precipitation33%
Record high73° (1978)
Record low20° (1991)
Fri, 0652° / 39°0.07
52 °
Forest River, Friday, 6 November
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.07 in
Chance of precipitation30%
Record high71° (1975)
Record low24° (1991)
Sat, 0751° / 39°0.05
51 °
Forest River, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.05 in
Chance of precipitation22%
Record high69° (2020)
Record low20° (1991)
Sun, 0851° / 39°0.05
51 °
Forest River, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.05 in
Chance of precipitation18%
Record high74° (2020)
Record low17° (1991)
Mon, 0951° / 39°0.12
51 °
Forest River, Monday, 9 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.12 in
Chance of precipitation38%
Record high72° (2020)
Record low21° (1991)
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 Forest River, 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 Forest River, 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.