Alum Creek · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Alum Creek & 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
90°
Sun, Sep 13
Coldest night
47°
Wed, Sep 16
Days with precip
4 / 14
of 14 forecast days
Nicest day
Wed, Sep 16
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 12 – Sun 13 Sep
90° 67°
15% precip chance
Sat 19 – Sun 20 Sep
83° 57°
57% precip chance
Sat 26 – Sun 27 Sep
76° 56°
typical range
Sat 3 – Sun 4 Oct
67° 48°
typical range
30 days — Alum Creek
14 forecast + 16 climatology
Mon · Today Partly cloudy
85°65°0.2 mm⌄
Wind8 mph E
Gusts16 mph
UV index5 – Moderate
Precip chance18%
Sunrise07:02
Sunset19:48
Tue · Tomorrow Mostly cloudy
88°64°8%⌄
Wind6 mph W
Gusts13 mph
UV index7 – High
Precip chance8%
Sunrise07:02
Sunset19:46
Wednesday 9/9 Mostly cloudy
89°71°10%⌄
Wind11 mph S
Gusts27 mph
UV index7 – High
Precip chance10%
Sunrise07:03
Sunset19:45
Thursday 10/9 Showers
78°67°9.9 mm⌄
Wind10 mph SW
Gusts27 mph
UV index1 – Low
Precip chance82%
Sunrise07:04
Sunset19:43
Friday 11/9 Sunny
83°55°1.5 mm⌄
Wind5 mph E
Gusts14 mph
UV index7 – High
Precip chance57%
Sunrise07:05
Sunset19:42
Saturday 12/9 Mostly cloudy
85°67°15%⌄
Wind8 mph SW
Gusts13 mph
UV index7 – High
Precip chance15%
Sunrise07:06
Sunset19:40
Sunday 13/9 Sunny
90°72°9%⌄
Wind9 mph SW
Gusts15 mph
UV index8 – Very high
Precip chance9%
Sunrise07:07
Sunset19:39
Monday 14/9 Showers
81°57°12.0 mm⌄
Wind12 mph W
Gusts26 mph
UV index7 – High
Precip chance86%
Sunrise07:08
Sunset19:37
Tuesday 15/9 Sunny
65°52°21%⌄
Wind11 mph NE
Gusts18 mph
UV index5 – Moderate
Precip chance21%
Sunrise07:09
Sunset19:35
Wednesday 16/9 Sunny
75°47°3%⌄
Wind6 mph E
Gusts23 mph
UV index6 – High
Precip chance3%
Sunrise07:09
Sunset19:34
Thursday 17/9 Sunny
78°53°4%⌄
Wind6 mph E
Gusts8 mph
UV index7 – High
Precip chance4%
Sunrise07:10
Sunset19:32
Friday 18/9 Sunny
81°55°3%⌄
Wind4 mph E
Gusts12 mph
UV index7 – High
Precip chance3%
Sunrise07:11
Sunset19:31
Saturday 19/9 Sunny
83°57°3%⌄
Wind3 mph SE
Gusts14 mph
UV index7 – High
Precip chance3%
Sunrise07:12
Sunset19:29
Sunday 20/9 Partly cloudy
81°60°1.5 mm⌄
Wind11 mph N
Gusts26 mph
UV index7 – High
Precip chance57%
Sunrise07:13
Sunset19:27
Monday 21/9 Rain (climatological)
79°59°6.4 mm⌄
Day≈74–85°
Night≈53–64°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
85°62°20%⌄
Day≈80–90°
Night≈57–67°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
85°62°20%⌄
Day≈80–90°
Night≈57–68°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Rain (climatological)
83°61°5.0 mm⌄
Day≈77–88°
Night≈55–66°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
78°58°20%⌄
Day≈72–83°
Night≈52–63°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
75°56°20%⌄
Day≈69–80°
Night≈51–61°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Rain (climatological)
76°57°5.0 mm⌄
Day≈71–82°
Night≈52–62°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
81°60°20%⌄
Day≈76–86°
Night≈54–65°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Partly cloudy (climatological)
85°62°20%⌄
Day≈80–91°
Night≈57–68°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Rain (climatological)
88°64°4.8 mm⌄
Day≈82–93°
Night≈58–69°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 1/10 Partly cloudy (climatological)
73°52°20%⌄
Day≈68–79°
Night≈46–57°
Precip≈2.2 in / October
(climatological)Typical range for these dates · 1991–2020
Friday 2/10 Partly cloudy (climatological)
68°48°20%⌄
Day≈62–73°
Night≈43–54°
Precip≈2.2 in / October
(climatological)Typical range for these dates · 1991–2020
Saturday 3/10 Rain (climatological)
67°48°3.9 mm⌄
Day≈62–73°
Night≈43–53°
Precip≈2.2 in / October
(climatological)Typical range for these dates · 1991–2020
Sunday 4/10 Partly cloudy (climatological)
66°48°20%⌄
Day≈61–72°
Night≈42–53°
Precip≈2.2 in / October
(climatological)Typical range for these dates · 1991–2020
Monday 5/10 Partly cloudy (climatological)
71°50°20%⌄
Day≈65–76°
Night≈45–56°
Precip≈2.2 in / October
(climatological)Typical range for these dates · 1991–2020
Tuesday 6/10 Rain (climatological)
73°51°4.6 mm⌄
Day≈67–78°
Night≈46–57°
Precip≈2.2 in / October
(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 Creek, 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.