Monthly outlook for Wilmette, IL: average high 62.3°, average low 49.2°. That is 3.4° above the climate normal for October. Precipitation is expected on 5 days (about 1.6 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 25 October (73.4°), the coolest 17 October (37.8°).
62.3°/49.2°
Average high / low
+3.4°
Above normal
5 / 5
Wet days / normal
1.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
17 October – 26 October
64.1°
57.2°
+3.9°
27 October – 5 November
59.3°
53.4°
+3.2°
6 November – 15 November
at normal
48.3°
—
October records over 66 years
87.3°3 October 2025All-time high
28°31 October 2023All-time low
Climate normals and records are computed from the nearest reference point — Evanston (3 mi).
Sun, 1859° / 44°0
59 °
Wilmette, Sunday, 18 October
Clear. High 59°, low 44°.
Pressure30.42 inHg
Wind11.5 mph SW
Humidity60%
Visibility6.2 mi
Dew point42°
Mon, 1963° / 43°0
63 °
Wilmette, Monday, 19 October
Mostly clear. High 63°, low 43°.
Pressure30.39 inHg
Wind3.7 mph SW
Humidity62%
Visibility6.2 mi
Dew point46°
Tue, 2064° / 48°0
64 °
Wilmette, Tuesday, 20 October
Mostly clear. High 64°, low 48°.
Pressure30.39 inHg
Wind3.2 mph SE
Humidity66%
Visibility4.7 mi
Dew point51°
Wed, 2167° / 49°0
67 °
Wilmette, Wednesday, 21 October
Clear. High 67°, low 49°.
Pressure30.27 inHg
Wind4.4 mph SW
Humidity55%
Visibility—
Dew point47°
Thu, 2266° / 50°0
66 °
Wilmette, Thursday, 22 October
Clear. High 66°, low 50°.
Pressure30.24 inHg
Wind3.5 mph NE
Humidity64%
Visibility—
Dew point51°
Fri, 2369° / 57°0
69 °
Wilmette, Friday, 23 October
Overcast. High 69°, low 57°.
Pressure30.21 inHg
Wind8.2 mph SE
Humidity39%
Visibility—
Dew point40°
Sat, 2469° / 59°0
69 °
Wilmette, Saturday, 24 October
Overcast. High 69°, low 59°.
Pressure30.21 inHg
Wind9.5 mph S
Humidity41%
Visibility—
Dew point42°
Sun, 2573° / 61°0
73 °
Wilmette, Sunday, 25 October
Overcast. High 73°, low 61°.
Pressure30.00 inHg
Wind10.1 mph S
Humidity36%
Visibility—
Dew point42°
Mon, 2658° / 45°0.57
58 °
Wilmette, Monday, 26 October
Rain. High 58°, low 45°.
Pressure30.12 inHg
Wind14.4 mph N
Humidity80%
Visibility—
Dew point40°
Tue, 2750° / 41°0
50 °
Wilmette, Tuesday, 27 October
Partly cloudy. High 50°, low 41°.
Pressure30.45 inHg
Wind8.8 mph NW
Humidity44%
Visibility—
Dew point27°
Wed, 2854° / 48°0.45
54 °
Wilmette, Wednesday, 28 October
Rain. High 54°, low 48°.
Pressure30.12 inHg
Wind17.1 mph S
Humidity63%
Visibility—
Dew point37°
Thu, 2958° / 51°0.05
58 °
Wilmette, Thursday, 29 October
Light rain. High 58°, low 51°.
Pressure29.94 inHg
Wind22.9 mph W
Humidity65%
Visibility—
Dew point42°
Fri, 3060° / 48°0
60 °
Wilmette, Friday, 30 October
Overcast. High 60°, low 48°.
Pressure30.06 inHg
Wind12.5 mph SE
Humidity48%
Visibility—
Dew point37°
Sat, 3167° / 55°0.45
67 °
Wilmette, Saturday, 31 October
Rain. High 67°, low 55°.
Pressure29.68 inHg
Wind20.8 mph S
Humidity70%
Visibility—
Dew point50°
Sun, 0167° / 51°0.11
67 °
Wilmette, Sunday, 1 November
Light rain. High 67°, low 51°.
Pressure29.91 inHg
Wind17.7 mph SW
Humidity56%
Visibility—
Dew point39°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0253° / 43°0.13
53 °
Wilmette, Monday, 2 November
Climate normal for this date — 60-year average.
Average high53°
Average low43°
Average precipitation0.13 in
Chance of precipitation40%
Record high69° (1961)
Record low26° (1991)
Tue, 0352° / 42°0.06
52 °
Wilmette, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high52°
Average low42°
Average precipitation0.06 in
Chance of precipitation20%
Record high70° (2022)
Record low20° (1991)
Wed, 0452° / 43°0.09
52 °
Wilmette, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high52°
Average low43°
Average precipitation0.09 in
Chance of precipitation28%
Record high69° (2022)
Record low18° (1991)
Thu, 0552° / 42°0.12
52 °
Wilmette, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high52°
Average low42°
Average precipitation0.12 in
Chance of precipitation33%
Record high69° (1978)
Record low22° (1991)
Fri, 0651° / 40°0.07
51 °
Wilmette, Friday, 6 November
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.07 in
Chance of precipitation30%
Record high70° (2020)
Record low25° (1991)
Sat, 0750° / 41°0.06
50 °
Wilmette, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high50°
Average low41°
Average precipitation0.06 in
Chance of precipitation22%
Record high69° (2020)
Record low23° (1991)
Sun, 0850° / 41°0.06
50 °
Wilmette, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high50°
Average low41°
Average precipitation0.06 in
Chance of precipitation18%
Record high73° (2020)
Record low19° (1991)
Mon, 0951° / 41°0.12
51 °
Wilmette, Monday, 9 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.12 in
Chance of precipitation38%
Record high73° (2020)
Record low23° (1991)
Tue, 1049° / 40°0.11
49 °
Wilmette, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.11 in
Chance of precipitation33%
Record high73° (2020)
Record low19° (2018)
Wed, 1147° / 38°0.08
47 °
Wilmette, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high47°
Average low38°
Average precipitation0.08 in
Chance of precipitation32%
Record high66° (1964)
Record low18° (2019)
Thu, 1246° / 37°0.06
46 °
Wilmette, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high46°
Average low37°
Average precipitation0.06 in
Chance of precipitation23%
Record high65° (1964)
Record low8° (2019)
Fri, 1346° / 36°0.05
46 °
Wilmette, Friday, 13 November
Climate normal for this date — 60-year average.
Average high46°
Average low36°
Average precipitation0.05 in
Chance of precipitation18%
Record high64° (1999)
Record low9° (2019)
Sat, 1447° / 37°0.07
47 °
Wilmette, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high47°
Average low37°
Average precipitation0.07 in
Chance of precipitation35%
Record high63° (2025)
Record low17° (1986)
Sun, 1546° / 37°0.09
46 °
Wilmette, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high46°
Average low37°
Average precipitation0.09 in
Chance of precipitation28%
Record high70° (2025)
Record low21° (2019)
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 Wilmette, 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 Wilmette, 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.