Monthly outlook for Long Lake, IL: average high 62.5°, average low 47.8°. That is 5.3° above the climate normal for October. Precipitation is expected on 2 days (about 0.3 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 25 October (72.4°), the coolest 4 November (39.4°).
62.5°/47.8°
Average high / low
+5.3°
Above normal
2 / 5
Wet days / normal
0.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
24 October – 2 November
65.2°
54.4°
+6°
3 November – 12 November
58°
49.4°
+4.8°
13 November – 22 November
at normal
45°
—
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).
Sun, 2572° / 48°0
72 °
Long Lake, Sunday, 25 October
Partly cloudy. High 72°, low 48°.
Pressure30.39 inHg
Wind6.7 mph SW
Humidity60%
Visibility6.2 mi
Dew point52°
Mon, 2662° / 50°0
62 °
Long Lake, Monday, 26 October
Overcast. High 62°, low 50°.
Pressure30.36 inHg
Wind8.3 mph NE
Humidity65%
Visibility6.2 mi
Dew point50°
Tue, 2762° / 50°0
62 °
Long Lake, Tuesday, 27 October
Overcast. High 62°, low 50°.
Pressure30.30 inHg
Wind8.3 mph E
Humidity77%
Visibility6.2 mi
Dew point53°
Wed, 2868° / 55°0.01
68 °
Long Lake, Wednesday, 28 October
Light rain. High 68°, low 55°.
Pressure30.15 inHg
Wind11.2 mph SW
Humidity59%
Visibility—
Dew point51°
Thu, 2971° / 55°0.02
71 °
Long Lake, Thursday, 29 October
Light rain. High 71°, low 55°.
Pressure30.18 inHg
Wind9.8 mph SW
Humidity59%
Visibility—
Dew point53°
Fri, 3065° / 58°0.06
65 °
Long Lake, Friday, 30 October
Light rain. High 65°, low 58°.
Pressure30.15 inHg
Wind6 mph SW
Humidity70%
Visibility—
Dew point54°
Sat, 3169° / 57°0.15
69 °
Long Lake, Saturday, 31 October
Light rain. High 69°, low 57°.
Pressure30.06 inHg
Wind15.5 mph S
Humidity50%
Visibility—
Dew point49°
Sun, 0160° / 47°0.02
60 °
Long Lake, Sunday, 1 November
Light rain. High 60°, low 47°.
Pressure29.88 inHg
Wind18 mph S
Humidity73%
Visibility—
Dew point50°
Mon, 0254° / 40°0
54 °
Long Lake, Monday, 2 November
Clear. High 54°, low 40°.
Pressure30.06 inHg
Wind13.7 mph W
Humidity41%
Visibility—
Dew point28°
Tue, 0347° / 41°0
47 °
Long Lake, Tuesday, 3 November
Mostly clear. High 47°, low 41°.
Pressure30.06 inHg
Wind15.6 mph NW
Humidity40%
Visibility—
Dew point23°
Wed, 0450° / 39°0
50 °
Long Lake, Wednesday, 4 November
Overcast. High 50°, low 39°.
Pressure30.06 inHg
Wind10.1 mph SW
Humidity39%
Visibility—
Dew point25°
Thu, 0562° / 40°0
62 °
Long Lake, Thursday, 5 November
Overcast. High 62°, low 40°.
Pressure30.00 inHg
Wind9.4 mph W
Humidity39%
Visibility—
Dew point33°
Fri, 0669° / 47°0
69 °
Long Lake, Friday, 6 November
Mostly clear. High 69°, low 47°.
Pressure29.97 inHg
Wind15.5 mph SW
Humidity58%
Visibility—
Dew point50°
Sat, 0760° / 48°0
60 °
Long Lake, Saturday, 7 November
Overcast. High 60°, low 48°.
Pressure30.06 inHg
Wind14.8 mph NW
Humidity44%
Visibility—
Dew point37°
Sun, 0859° / 42°0
59 °
Long Lake, Sunday, 8 November
Overcast. High 59°, low 42°.
Pressure30.12 inHg
Wind7.2 mph NW
Humidity36%
Visibility—
Dew point30°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0950° / 38°0.11
50 °
Long Lake, Monday, 9 November
Climate normal for this date — 60-year average.
Average high50°
Average low38°
Average precipitation0.11 in
Chance of precipitation33%
Record high73° (2020)
Record low20° (1991)
Tue, 1049° / 37°0.11
49 °
Long Lake, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high49°
Average low37°
Average precipitation0.11 in
Chance of precipitation38%
Record high72° (2022)
Record low16° (2017)
Wed, 1146° / 35°0.08
46 °
Long Lake, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.08 in
Chance of precipitation35%
Record high67° (1964)
Record low15° (2019)
Thu, 1245° / 34°0.06
45 °
Long Lake, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high45°
Average low34°
Average precipitation0.06 in
Chance of precipitation22%
Record high64° (1964)
Record low3° (2019)
Fri, 1345° / 33°0.05
45 °
Long Lake, Friday, 13 November
Climate normal for this date — 60-year average.
Average high45°
Average low33°
Average precipitation0.05 in
Chance of precipitation25%
Record high67° (1999)
Record low2° (2019)
Sat, 1446° / 34°0.07
46 °
Long Lake, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high46°
Average low34°
Average precipitation0.07 in
Chance of precipitation28%
Record high66° (1971)
Record low15° (1986)
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)
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.