Monthly outlook for Wilmette, IL: average high 59.8°, average low 46.8°. That is 2.6° above the climate normal for October. Precipitation is expected on 2 days (about 0.5 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 22 October (73.5°), the coolest 29 October (41.9°).
59.8°/46.8°
Average high / low
+2.6°
Above normal
2 / 5
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
20 October – 29 October
63.1°
56.1°
+3.9°
30 October – 8 November
54.3°
52.3°
+1.1°
9 November – 18 November
at normal
47°
—
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).
Wed, 2172° / 43°0
72 °
Wilmette, Wednesday, 21 October
Clear. High 72°, low 43°.
Pressure30.27 inHg
Wind2.9 mph SW
Humidity58%
Visibility6.2 mi
Dew point49°
Thu, 2274° / 45°0
74 °
Wilmette, Thursday, 22 October
Clear. High 74°, low 45°.
Pressure30.27 inHg
Wind3.4 mph NE
Humidity74%
Visibility6.2 mi
Dew point56°
Fri, 2365° / 53°0
65 °
Wilmette, Friday, 23 October
Clear. High 65°, low 53°.
Pressure30.36 inHg
Wind1.9 mph S
Humidity79%
Visibility1.3 mi
Dew point56°
Sat, 2466° / 51°0
66 °
Wilmette, Saturday, 24 October
Overcast. High 66°, low 51°.
Pressure30.39 inHg
Wind5.6 mph S
Humidity69%
Visibility6.2 mi
Dew point52°
Sun, 2569° / 53°0
69 °
Wilmette, Sunday, 25 October
Overcast. High 69°, low 53°.
Pressure30.36 inHg
Wind5.8 mph S
Humidity62%
Visibility—
Dew point51°
Mon, 2667° / 50°0.03
67 °
Wilmette, Monday, 26 October
Light rain. High 67°, low 50°.
Pressure30.18 inHg
Wind17.2 mph N
Humidity64%
Visibility—
Dew point53°
Tue, 2749° / 46°0.23
49 °
Wilmette, Tuesday, 27 October
Light rain. High 49°, low 46°.
Pressure30.36 inHg
Wind17 mph N
Humidity50%
Visibility—
Dew point31°
Wed, 2848° / 45°0
48 °
Wilmette, Wednesday, 28 October
Overcast. High 48°, low 45°.
Pressure30.33 inHg
Wind11 mph E
Humidity49%
Visibility—
Dew point29°
Thu, 2953° / 42°0
53 °
Wilmette, Thursday, 29 October
Mostly clear. High 53°, low 42°.
Pressure30.21 inHg
Wind8.7 mph W
Humidity41%
Visibility—
Dew point28°
Fri, 3052° / 42°0
52 °
Wilmette, Friday, 30 October
Clear. High 52°, low 42°.
Pressure30.24 inHg
Wind7.9 mph SE
Humidity41%
Visibility—
Dew point27°
Sat, 3161° / 47°0
61 °
Wilmette, Saturday, 31 October
Clear. High 61°, low 47°.
Pressure30.00 inHg
Wind12.2 mph S
Humidity34%
Visibility—
Dew point29°
Sun, 0155° / 52°0.23
55 °
Wilmette, Sunday, 1 November
Light rain. High 55°, low 52°.
Pressure29.97 inHg
Wind11.7 mph S
Humidity91%
Visibility—
Dew point50°
Mon, 0258° / 51°0
58 °
Wilmette, Monday, 2 November
Clear. High 58°, low 51°.
Pressure30.12 inHg
Wind12.1 mph NW
Humidity31%
Visibility—
Dew point27°
Tue, 0349° / 43°0
49 °
Wilmette, Tuesday, 3 November
Overcast. High 49°, low 43°.
Pressure30.33 inHg
Wind9.8 mph NW
Humidity43%
Visibility—
Dew point26°
Wed, 0451° / 46°0.01
51 °
Wilmette, Wednesday, 4 November
Light rain. High 51°, low 46°.
Pressure30.18 inHg
Wind9.6 mph NE
Humidity55%
Visibility—
Dew point35°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Mon, 1646° / 37°0.05
46 °
Wilmette, Monday, 16 November
Climate normal for this date — 60-year average.
Average high46°
Average low37°
Average precipitation0.05 in
Chance of precipitation23%
Record high62° (2023)
Record low24° (1997)
Tue, 1746° / 37°0.09
46 °
Wilmette, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high46°
Average low37°
Average precipitation0.09 in
Chance of precipitation32%
Record high64° (2016)
Record low18° (2014)
Wed, 1846° / 37°0.13
46 °
Wilmette, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high46°
Average low37°
Average precipitation0.13 in
Chance of precipitation27%
Record high63° (2016)
Record low14° (2014)
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.