Alum Rock · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Alum Rock & neighbors — hit play
Every city on the map carries real forecast data from the same models as its city page, refreshed several times a day. The icon is the day's overall look; the number is the afternoon high.
Next 14 days at a glance
from the model forecast
Hottest day
94°
Wed, Aug 26
Coldest night
47°
Tue, Sep 1
Days with precip
0 / 14
of 14 forecast days
Nicest day
Mon, Aug 31
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 29 – Sun 30 Aug
88° 53°
2% precip chance
Sat 5 – Sun 6 Sep
92° 50°
5% precip chance
Sat 12 – Sun 13 Sep
77° 46°
typical range
Sat 19 – Sun 20 Sep
79° 46°
typical range
30 days — Alum Rock
14 forecast + 16 climatology
Mon · Today Sunny
91°60°7%⌄
Wind7 mph W
Gusts13 mph
UV index9 – Very high
Precip chance7%
Sunrise06:31
Sunset19:48
Tue · Tomorrow Mostly cloudy
91°59°6%⌄
Wind9 mph NW
Gusts19 mph
UV index8 – Very high
Precip chance6%
Sunrise06:32
Sunset19:46
Wednesday 26/8 Sunny
94°62°2%⌄
Wind10 mph NW
Gusts21 mph
UV index9 – Very high
Precip chance2%
Sunrise06:32
Sunset19:45
Thursday 27/8 Sunny
93°60°1%⌄
Wind11 mph NW
Gusts20 mph
UV index9 – Very high
Precip chance1%
Sunrise06:33
Sunset19:43
Friday 28/8 Sunny
89°58°1%⌄
Wind10 mph NW
Gusts20 mph
UV index8 – Very high
Precip chance1%
Sunrise06:34
Sunset19:42
Saturday 29/8 Sunny
84°53°2%⌄
Wind10 mph NW
Gusts15 mph
UV index7 – High
Precip chance2%
Sunrise06:35
Sunset19:41
Sunday 30/8 Sunny
88°54°2%⌄
Wind10 mph NW
Gusts15 mph
UV index8 – Very high
Precip chance2%
Sunrise06:36
Sunset19:39
Monday 31/8 Sunny
83°50°2%⌄
Wind11 mph NW
Gusts15 mph
UV index7 – High
Precip chance2%
Sunrise06:37
Sunset19:38
Tuesday 1/9 Sunny
86°47°2%⌄
Wind9 mph NW
Gusts16 mph
UV index7 – High
Precip chance2%
Sunrise06:37
Sunset19:36
Wednesday 2/9 Sunny
86°48°3%⌄
Wind8 mph NW
Gusts15 mph
UV index7 – High
Precip chance3%
Sunrise06:38
Sunset19:35
Thursday 3/9 Sunny
89°51°3%⌄
Wind6 mph W
Gusts13 mph
UV index8 – Very high
Precip chance3%
Sunrise06:39
Sunset19:33
Friday 4/9 Sunny
84°51°6%⌄
Wind7 mph S
Gusts19 mph
UV index7 – High
Precip chance6%
Sunrise06:40
Sunset19:32
Saturday 5/9 Sunny
85°50°5%⌄
Wind7 mph SE
Gusts17 mph
UV index7 – High
Precip chance5%
Sunrise06:41
Sunset19:30
Sunday 6/9 Sunny
92°55°1%⌄
Wind8 mph W
Gusts17 mph
UV index8 – Very high
Precip chance1%
Sunrise06:42
Sunset19:29
Monday 7/9 Light rain (climatological)
80°47°0.8 mm⌄
Day≈74–85°
Night≈42–53°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Partly cloudy (climatological)
87°52°20%⌄
Day≈82–92°
Night≈46–57°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Partly cloudy (climatological)
88°53°20%⌄
Day≈83–94°
Night≈47–58°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Light rain (climatological)
83°49°1.8 mm⌄
Day≈78–89°
Night≈44–55°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Partly cloudy (climatological)
81°48°20%⌄
Day≈76–87°
Night≈43–54°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Partly cloudy (climatological)
77°46°20%⌄
Day≈72–83°
Night≈40–51°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Light rain (climatological)
76°46°1.6 mm⌄
Day≈71–82°
Night≈40–51°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
85°50°20%⌄
Day≈79–90°
Night≈45–56°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
86°51°20%⌄
Day≈80–91°
Night≈46–56°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Light rain (climatological)
88°52°1.8 mm⌄
Day≈82–93°
Night≈47–58°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
83°49°20%⌄
Day≈78–88°
Night≈44–55°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
81°48°20%⌄
Day≈75–86°
Night≈43–53°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Light rain (climatological)
79°47°1.8 mm⌄
Day≈74–84°
Night≈42–52°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
77°46°20%⌄
Day≈72–83°
Night≈41–51°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
84°50°20%⌄
Day≈79–90°
Night≈45–56°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Light rain (climatological)
85°51°1.5 mm⌄
Day≈80–91°
Night≈45–56°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
How does a 30-day outlook work?
The first 14 days are a live model forecast. The back half of the month shows the typical range for those dates — useful for planning, not a literal prediction.
First 14 days: a real forecast, blended from NBM, ECMWF and GFS runs. Trust it most inside three days; by the second week treat it as a lean, not a promise.
Rest of the month: past day 14 we stop pretending to forecast and switch to the climate corridor — the range those dates have produced over three decades computed directly for Alum Rock, with mild week-to-week wiggle.
Good question for this page: "Is late August usually humid in Chicago?" Bad question: "Do I need an umbrella on the 29th?" — three weeks out no one knows, and that's the honest answer.