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
91°
Tue, Sep 15
Coldest night
54°
Sat, Sep 12
Days with precip
2 / 14
of 14 forecast days
Nicest day
Fri, Sep 11
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
90° 64°
73% precip chance
Sat 12 – Sun 13 Sep
89° 54°
9% precip chance
Sat 19 – Sun 20 Sep
89° 63°
typical range
Sat 26 – Sun 27 Sep
90° 64°
typical range
30 days — Alum Creek
14 forecast + 16 climatology
Sat · Today Sunny
90°67°7.2 mm⌄
Wind11 mph N
Gusts23 mph
UV index7 – High
Precip chance73%
Sunrise07:00
Sunset19:51
Sun · Tomorrow Sunny
82°64°0.2 mm⌄
Wind8 mph N
Gusts26 mph
UV index8 – High
Precip chance18%
Sunrise07:01
Sunset19:49
Monday 7/9 Mostly cloudy
84°65°13%⌄
Wind7 mph SE
Gusts17 mph
UV index7 – High
Precip chance13%
Sunrise07:02
Sunset19:48
Tuesday 8/9 Mostly cloudy
89°64°10%⌄
Wind7 mph W
Gusts14 mph
UV index5 – Moderate
Precip chance10%
Sunrise07:02
Sunset19:46
Wednesday 9/9 Mostly cloudy
91°67°8%⌄
Wind10 mph W
Gusts30 mph
UV index8 – Very high
Precip chance8%
Sunrise07:03
Sunset19:45
Thursday 10/9 Mostly cloudy
82°63°11%⌄
Wind9 mph NW
Gusts29 mph
UV index6 – High
Precip chance11%
Sunrise07:04
Sunset19:43
Friday 11/9 Mostly cloudy
76°57°11%⌄
Wind7 mph N
Gusts17 mph
UV index6 – High
Precip chance11%
Sunrise07:05
Sunset19:42
Saturday 12/9 Sunny
83°54°6%⌄
Wind5 mph NE
Gusts13 mph
UV index7 – High
Precip chance6%
Sunrise07:06
Sunset19:40
Sunday 13/9 Mostly cloudy
89°62°9%⌄
Wind5 mph W
Gusts15 mph
UV index8 – Very high
Precip chance9%
Sunrise07:07
Sunset19:39
Monday 14/9 Sunny
91°70°4%⌄
Wind4 mph NE
Gusts9 mph
UV index8 – Very high
Precip chance4%
Sunrise07:08
Sunset19:37
Tuesday 15/9 Sunny
91°72°4%⌄
Wind5 mph E
Gusts15 mph
UV index8 – Very high
Precip chance4%
Sunrise07:09
Sunset19:35
Wednesday 16/9 Sunny
90°70°3%⌄
Wind5 mph SE
Gusts11 mph
UV index8 – Very high
Precip chance3%
Sunrise07:09
Sunset19:34
Thursday 17/9 Partly cloudy
88°66°4%⌄
Wind6 mph SW
Gusts12 mph
UV index8 – Very high
Precip chance4%
Sunrise07:10
Sunset19:32
Friday 18/9 Sunny
76°57°1.3 mm⌄
Wind10 mph NW
Gusts22 mph
UV index6 – High
Precip chance57%
Sunrise07:11
Sunset19:31
Saturday 19/9 Rain (climatological)
84°63°2.2 mm⌄
Day≈78–89°
Night≈57–68°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
89°66°20%⌄
Day≈84–95°
Night≈61–71°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
89°66°20%⌄
Day≈84–95°
Night≈61–72°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Light rain (climatological)
87°65°1.7 mm⌄
Day≈82–92°
Night≈59–70°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
82°62°20%⌄
Day≈77–87°
Night≈56–67°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
79°60°20%⌄
Day≈74–85°
Night≈55–65°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Light rain (climatological)
81°61°1.7 mm⌄
Day≈75–86°
Night≈56–66°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
85°64°20%⌄
Day≈80–91°
Night≈58–69°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
90°66°20%⌄
Day≈84–95°
Night≈61–72°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Light rain (climatological)
92°68°1.6 mm⌄
Day≈87–98°
Night≈62–73°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Partly cloudy (climatological)
89°65°20%⌄
Day≈83–94°
Night≈60–71°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Partly cloudy (climatological)
83°62°20%⌄
Day≈78–88°
Night≈57–68°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 1/10 Light rain (climatological)
72°52°1.3 mm⌄
Day≈66–77°
Night≈47–57°
Precip≈0.8 in / October
(climatological)Typical range for these dates · 1991–2020
Friday 2/10 Partly cloudy (climatological)
71°52°20%⌄
Day≈65–76°
Night≈46–57°
Precip≈0.8 in / October
(climatological)Typical range for these dates · 1991–2020
Saturday 3/10 Partly cloudy (climatological)
75°54°20%⌄
Day≈70–81°
Night≈49–60°
Precip≈0.8 in / October
(climatological)Typical range for these dates · 1991–2020
Sunday 4/10 Light rain (climatological)
77°55°1.6 mm⌄
Day≈72–83°
Night≈50–61°
Precip≈0.8 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.