Monthly outlook for Long Lake, IL: average high 60.9°, average low 49.4°. That is 6° above the climate normal for October. Precipitation is expected on 10 days (about 3.4 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 1 November (68.4°), the coolest 6 November (38.9°).
60.9°/49.4°
Average high / low
+6°
Above normal
10 / 5
Wet days / normal
3.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
30 October – 8 November
60.1°
51.9°
+4.5°
9 November – 18 November
62.1°
46.4°
+8.7°
19 November – 28 November
at normal
42.5°
—
October records over 66 years
86.9°3 October 2025All-time high
26.1°30 October 1988All-time low
Climate normals and records are computed from the nearest reference point — Round Lake Beach (2 mi).
Sat, 3161° / 51°1.02
61 °
Long Lake, Saturday, 31 October
Heavy rain. High 61°, low 51°.
Pressure30.36 inHg
Wind8.3 mph SE
Humidity93%
Visibility6.2 mi
Dew point49°
Sun, 0168° / 50°0
68 °
Long Lake, Sunday, 1 November
Overcast. High 68°, low 50°.
Pressure30.33 inHg
Wind5.4 mph S
Humidity66%
Visibility6.2 mi
Dew point53°
Mon, 0261° / 55°0.06
61 °
Long Lake, Monday, 2 November
Light rain. High 61°, low 55°.
Pressure30.09 inHg
Wind10 mph S
Humidity79%
Visibility6.2 mi
Dew point53°
Tue, 0367° / 60°0.33
67 °
Long Lake, Tuesday, 3 November
Light rain. High 67°, low 60°.
Pressure29.77 inHg
Wind17.9 mph S
Humidity80%
Visibility—
Dew point60°
Wed, 0463° / 57°0.59
63 °
Long Lake, Wednesday, 4 November
Rain. High 63°, low 57°.
Pressure29.71 inHg
Wind13.2 mph S
Humidity72%
Visibility—
Dew point54°
Thu, 0557° / 50°0.24
57 °
Long Lake, Thursday, 5 November
Light rain. High 57°, low 50°.
Pressure29.71 inHg
Wind17 mph N
Humidity78%
Visibility—
Dew point49°
Fri, 0652° / 39°0
52 °
Long Lake, Friday, 6 November
Mostly clear. High 52°, low 39°.
Pressure30.09 inHg
Wind8 mph N
Humidity55%
Visibility—
Dew point35°
Sat, 0755° / 41°0
55 °
Long Lake, Saturday, 7 November
Overcast. High 55°, low 41°.
Pressure30.27 inHg
Wind8.3 mph S
Humidity50%
Visibility—
Dew point35°
Sun, 0858° / 49°0.28
58 °
Long Lake, Sunday, 8 November
Rain. High 58°, low 49°.
Pressure30.12 inHg
Wind12.9 mph NW
Humidity60%
Visibility—
Dew point44°
Mon, 0961° / 44°0
61 °
Long Lake, Monday, 9 November
Clear. High 61°, low 44°.
Pressure30.12 inHg
Wind10.6 mph W
Humidity48%
Visibility—
Dew point39°
Tue, 1062° / 45°0
62 °
Long Lake, Tuesday, 10 November
Partly cloudy. High 62°, low 45°.
Pressure29.97 inHg
Wind9.3 mph S
Humidity50%
Visibility—
Dew point40°
Wed, 1163° / 54°0.07
63 °
Long Lake, Wednesday, 11 November
Light rain. High 63°, low 54°.
Pressure29.65 inHg
Wind15.3 mph S
Humidity50%
Visibility—
Dew point43°
Thu, 1264° / 53°0.02
64 °
Long Lake, Thursday, 12 November
Light rain. High 64°, low 53°.
Pressure29.47 inHg
Wind14.9 mph S
Humidity44%
Visibility—
Dew point39°
Fri, 1356° / 46°0.52
56 °
Long Lake, Friday, 13 November
Rain. High 56°, low 46°.
Pressure29.97 inHg
Wind15.7 mph SE
Humidity58%
Visibility—
Dew point40°
Sat, 1467° / 54°0.26
67 °
Long Lake, Saturday, 14 November
Rain. High 67°, low 54°.
Pressure29.94 inHg
Wind17.4 mph S
Humidity57%
Visibility—
Dew point51°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 1546° / 35°0.08
46 °
Long Lake, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.08 in
Chance of precipitation28%
Record high68° (2025)
Record low17° (2019)
Mon, 1646° / 34°0.05
46 °
Long Lake, Monday, 16 November
Climate normal for this date — 60-year average.
Average high46°
Average low34°
Average precipitation0.05 in
Chance of precipitation17%
Record high62° (1988)
Record low21° (1997)
Tue, 1746° / 35°0.1
46 °
Long Lake, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.1 in
Chance of precipitation28%
Record high68° (2016)
Record low15° (2014)
Wed, 1846° / 35°0.1
46 °
Long Lake, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.1 in
Chance of precipitation28%
Record high64° (1975)
Record low12° (2014)
Thu, 1946° / 35°0.07
46 °
Long Lake, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.07 in
Chance of precipitation32%
Record high63° (1983)
Record low15° (2018)
Fri, 2044° / 33°0.07
44 °
Long Lake, Friday, 20 November
Climate normal for this date — 60-year average.
Average high44°
Average low33°
Average precipitation0.07 in
Chance of precipitation35%
Record high61° (2003)
Record low13° (2022)
Sat, 2143° / 32°0.1
43 °
Long Lake, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high43°
Average low32°
Average precipitation0.1 in
Chance of precipitation25%
Record high64° (1990)
Record low11° (1964)
Sun, 2243° / 31°0.04
43 °
Long Lake, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high43°
Average low31°
Average precipitation0.04 in
Chance of precipitation18%
Record high62° (2010)
Record low14° (2015)
Mon, 2343° / 32°0.07
43 °
Long Lake, Monday, 23 November
Climate normal for this date — 60-year average.
Average high43°
Average low32°
Average precipitation0.07 in
Chance of precipitation30%
Record high63° (2003)
Record low12° (1970)
Tue, 2442° / 30°0.08
42 °
Long Lake, Tuesday, 24 November
Climate normal for this date — 60-year average.
Average high42°
Average low30°
Average precipitation0.08 in
Chance of precipitation28%
Record high60° (1966)
Record low14° (2013)
Wed, 2542° / 32°0.09
42 °
Long Lake, Wednesday, 25 November
Climate normal for this date — 60-year average.
Average high42°
Average low32°
Average precipitation0.09 in
Chance of precipitation33%
Record high59° (1966)
Record low16° (2005)
Thu, 2642° / 31°0.12
42 °
Long Lake, Thursday, 26 November
Climate normal for this date — 60-year average.
Average high42°
Average low31°
Average precipitation0.12 in
Chance of precipitation45%
Record high61° (1990)
Record low6° (1977)
Fri, 2741° / 31°0.21
41 °
Long Lake, Friday, 27 November
Climate normal for this date — 60-year average.
Average high41°
Average low31°
Average precipitation0.21 in
Chance of precipitation50%
Record high63° (1990)
Record low15° (1977)
Sat, 2839° / 28°0.12
39 °
Long Lake, Saturday, 28 November
Climate normal for this date — 60-year average.
Average high39°
Average low28°
Average precipitation0.12 in
Chance of precipitation35%
Record high62° (1990)
Record low4° (2018)
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 Lake, 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 Lake, 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.