Monthly outlook for Williams Park, IL: average high 62.8°, average low 50.2°. That is 5.2° above the climate normal for October. Precipitation is expected on 5 days (about 1.1 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 25 October (70.4°), the coolest 30 October (39.6°).
62.8°/50.2°
Average high / low
+5.2°
Above normal
5 / 5
Wet days / normal
1.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
23 October – 1 November
62.2°
54.9°
+4.1°
2 November – 11 November
63.7°
50.1°
+7.6°
12 November – 21 November
at normal
45.2°
—
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 (10 mi).
Sat, 2468° / 47°0
68 °
Williams Park, Saturday, 24 October
Overcast. High 68°, low 47°.
Pressure30.39 inHg
Wind6.8 mph S
Humidity63%
Visibility6.2 mi
Dew point50°
Sun, 2570° / 48°0
70 °
Williams Park, Sunday, 25 October
Overcast. High 70°, low 48°.
Pressure30.39 inHg
Wind5.9 mph SW
Humidity57%
Visibility6.2 mi
Dew point51°
Mon, 2660° / 51°0
60 °
Williams Park, Monday, 26 October
Overcast. High 60°, low 51°.
Pressure30.39 inHg
Wind8.6 mph NE
Humidity71%
Visibility6.2 mi
Dew point50°
Tue, 2757° / 51°0
57 °
Williams Park, Tuesday, 27 October
Overcast. High 57°, low 51°.
Pressure30.33 inHg
Wind7.9 mph E
Humidity76%
Visibility6.2 mi
Dew point49°
Wed, 2868° / 52°0
68 °
Williams Park, Wednesday, 28 October
Clear. High 68°, low 52°.
Pressure30.06 inHg
Wind14.2 mph S
Humidity60%
Visibility—
Dew point50°
Thu, 2961° / 46°0.12
61 °
Williams Park, Thursday, 29 October
Light rain. High 61°, low 46°.
Pressure30.06 inHg
Wind15.5 mph SW
Humidity90%
Visibility—
Dew point56°
Fri, 3050° / 40°0
50 °
Williams Park, Friday, 30 October
Overcast. High 50°, low 40°.
Pressure30.30 inHg
Wind9.2 mph NE
Humidity63%
Visibility—
Dew point37°
Sat, 3155° / 46°0.16
55 °
Williams Park, Saturday, 31 October
Light rain. High 55°, low 46°.
Pressure30.15 inHg
Wind9.8 mph E
Humidity95%
Visibility—
Dew point50°
Sun, 0162° / 52°0
62 °
Williams Park, Sunday, 1 November
Overcast. High 62°, low 52°.
Pressure30.12 inHg
Wind3.6 mph SE
Humidity71%
Visibility—
Dew point50°
Mon, 0263° / 50°0.02
63 °
Williams Park, Monday, 2 November
Light rain. High 63°, low 50°.
Pressure30.03 inHg
Wind8.3 mph SE
Humidity61%
Visibility—
Dew point48°
Tue, 0358° / 56°0.48
58 °
Williams Park, Tuesday, 3 November
Rain. High 58°, low 56°.
Pressure29.71 inHg
Wind10.2 mph SE
Humidity98%
Visibility—
Dew point57°
Wed, 0463° / 58°0.04
63 °
Williams Park, Wednesday, 4 November
Light rain. High 63°, low 58°.
Pressure29.68 inHg
Wind7.1 mph NW
Humidity86%
Visibility—
Dew point58°
Thu, 0566° / 54°0.2
66 °
Williams Park, Thursday, 5 November
Rain. High 66°, low 54°.
Pressure29.83 inHg
Wind5.6 mph W
Humidity67%
Visibility—
Dew point54°
Fri, 0664° / 52°0.04
64 °
Williams Park, Friday, 6 November
Light rain. High 64°, low 52°.
Pressure29.85 inHg
Wind12.9 mph SW
Humidity64%
Visibility—
Dew point49°
Sat, 0768° / 52°0
68 °
Williams Park, Saturday, 7 November
Clear. High 68°, low 52°.
Pressure29.71 inHg
Wind15.6 mph W
Humidity48%
Visibility—
Dew point45°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0850° / 38°0.04
50 °
Williams Park, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high50°
Average low38°
Average precipitation0.04 in
Chance of precipitation18%
Record high73° (2020)
Record low15° (1991)
Mon, 0950° / 38°0.11
50 °
Williams Park, 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 °
Williams Park, 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 °
Williams Park, 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 °
Williams Park, 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 °
Williams Park, 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 °
Williams Park, 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 °
Williams Park, 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 °
Williams Park, 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 °
Williams Park, 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 °
Williams Park, 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 °
Williams Park, 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 °
Williams Park, 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 °
Williams Park, 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)
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 Williams Park, 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 Williams Park, 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.