Monthly outlook for Roselle, IL: average high 62°, average low 48.6°. That is 2.3° above the climate normal for October. Precipitation is expected on 4 days (about 1.9 inches), against a normal of 5 days and 1.4 inches. The warmest day looks like 23 October (74.6°), the coolest 17 October (37.4°).
62°/48.6°
Average high / low
+2.3°
Above normal
4 / 5
Wet days / normal
1.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
15 October – 24 October
64.4°
58.9°
+3°
25 October – 3 November
58°
55.1°
+1.6°
4 November – 13 November
at normal
49.9°
—
October records over 66 years
87.4°3 October 2025All-time high
22.5°24 October 1981All-time low
Climate normals and records are computed from the nearest reference point — Glendale Heights (4 mi).
Fri, 1657° / 44°0.03
57 °
Roselle, Friday, 16 October
Light rain. High 57°, low 44°.
Pressure30.03 inHg
Wind13.5 mph NW
Humidity67%
Visibility6.2 mi
Dew point42°
Sat, 1754° / 37°0
54 °
Roselle, Saturday, 17 October
Clear. High 54°, low 37°.
Pressure30.53 inHg
Wind3.4 mph W
Humidity50%
Visibility6.2 mi
Dew point32°
Sun, 1859° / 41°0
59 °
Roselle, Sunday, 18 October
Clear. High 59°, low 41°.
Pressure30.45 inHg
Wind11.3 mph SW
Humidity55%
Visibility6.2 mi
Dew point39°
Mon, 1961° / 41°0
61 °
Roselle, Monday, 19 October
Overcast. High 61°, low 41°.
Pressure30.39 inHg
Wind6.7 mph SW
Humidity56%
Visibility—
Dew point42°
Tue, 2067° / 45°0
67 °
Roselle, Tuesday, 20 October
Clear. High 67°, low 45°.
Pressure30.36 inHg
Wind5.3 mph E
Humidity48%
Visibility—
Dew point42°
Wed, 2170° / 54°0
70 °
Roselle, Wednesday, 21 October
Overcast. High 70°, low 54°.
Pressure30.33 inHg
Wind8.4 mph S
Humidity50%
Visibility—
Dew point47°
Thu, 2271° / 57°0
71 °
Roselle, Thursday, 22 October
Partly cloudy. High 71°, low 57°.
Pressure30.21 inHg
Wind9.8 mph S
Humidity47%
Visibility—
Dew point47°
Fri, 2375° / 60°0.06
75 °
Roselle, Friday, 23 October
Light rain. High 75°, low 60°.
Pressure30.00 inHg
Wind15.8 mph S
Humidity57%
Visibility—
Dew point55°
Sat, 2467° / 62°0.24
67 °
Roselle, Saturday, 24 October
Light rain. High 67°, low 62°.
Pressure30.18 inHg
Wind8.6 mph SW
Humidity79%
Visibility—
Dew point59°
Sun, 2561° / 52°0.02
61 °
Roselle, Sunday, 25 October
Light rain. High 61°, low 52°.
Pressure30.15 inHg
Wind10.2 mph N
Humidity58%
Visibility—
Dew point44°
Mon, 2655° / 44°0.96
55 °
Roselle, Monday, 26 October
Rain. High 55°, low 44°.
Pressure30.03 inHg
Wind13.6 mph NW
Humidity45%
Visibility—
Dew point31°
Tue, 2758° / 46°0
58 °
Roselle, Tuesday, 27 October
Clear. High 58°, low 46°.
Pressure30.15 inHg
Wind4.9 mph SW
Humidity48%
Visibility—
Dew point37°
Wed, 2859° / 47°0
59 °
Roselle, Wednesday, 28 October
Overcast. High 59°, low 47°.
Pressure29.91 inHg
Wind5.5 mph W
Humidity43%
Visibility—
Dew point35°
Thu, 2958° / 48°0
58 °
Roselle, Thursday, 29 October
Clear. High 58°, low 48°.
Pressure29.97 inHg
Wind13.8 mph NW
Humidity46%
Visibility—
Dew point36°
Fri, 3056° / 42°0
56 °
Roselle, Friday, 30 October
Clear. High 56°, low 42°.
Pressure30.12 inHg
Wind10.5 mph S
Humidity39%
Visibility—
Dew point30°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 3155° / 43°0.13
55 °
Roselle, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high55°
Average low43°
Average precipitation0.13 in
Chance of precipitation38%
Record high74° (1974)
Record low27° (1988)
Sun, 0155° / 41°0.16
55 °
Roselle, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high55°
Average low41°
Average precipitation0.16 in
Chance of precipitation38%
Record high73° (2016)
Record low20° (2019)
Mon, 0253° / 40°0.11
53 °
Roselle, Monday, 2 November
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.11 in
Chance of precipitation38%
Record high74° (1961)
Record low23° (1991)
Tue, 0352° / 39°0.06
52 °
Roselle, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.06 in
Chance of precipitation27%
Record high72° (1987)
Record low17° (1991)
Wed, 0452° / 41°0.09
52 °
Roselle, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high52°
Average low41°
Average precipitation0.09 in
Chance of precipitation23%
Record high71° (2015)
Record low15° (1991)
Thu, 0552° / 39°0.11
52 °
Roselle, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.11 in
Chance of precipitation27%
Record high74° (1978)
Record low18° (1991)
Fri, 0652° / 37°0.07
52 °
Roselle, Friday, 6 November
Climate normal for this date — 60-year average.
Average high52°
Average low37°
Average precipitation0.07 in
Chance of precipitation30%
Record high72° (1975)
Record low23° (1991)
Sat, 0751° / 37°0.05
51 °
Roselle, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.05 in
Chance of precipitation17%
Record high68° (2020)
Record low16° (1991)
Sun, 0851° / 37°0.04
51 °
Roselle, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.04 in
Chance of precipitation18%
Record high73° (2020)
Record low13° (1991)
Mon, 0951° / 38°0.11
51 °
Roselle, Monday, 9 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.11 in
Chance of precipitation35%
Record high72° (1999)
Record low17° (1991)
Tue, 1050° / 37°0.1
50 °
Roselle, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.1 in
Chance of precipitation32%
Record high72° (2020)
Record low17° (2017)
Wed, 1147° / 34°0.07
47 °
Roselle, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.07 in
Chance of precipitation28%
Record high70° (1964)
Record low15° (2019)
Thu, 1246° / 33°0.06
46 °
Roselle, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.06 in
Chance of precipitation22%
Record high66° (1964)
Record low2° (2019)
Fri, 1346° / 33°0.04
46 °
Roselle, Friday, 13 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.04 in
Chance of precipitation17%
Record high69° (1999)
Record low3° (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 Roselle, 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 Roselle, 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.