Mount Gay-Shamrock · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Mount Gay-Shamrock & 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°
Thu, Sep 10
Coldest night
59°
Sun, Sep 13
Days with precip
8 / 14
of 14 forecast days
Nicest day
Sat, Sep 12
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
90° 65°
73% precip chance
Sat 12 – Sun 13 Sep
85° 59°
4% precip chance
Sat 19 – Sun 20 Sep
91° 67°
typical range
Sat 26 – Sun 27 Sep
89° 67°
typical range
30 days — Mount Gay-Shamrock
14 forecast + 16 climatology
Fri · Today Sunny
93°70°5%⌄
Wind8 mph NW
Gusts15 mph
UV index9 – Very high
Precip chance5%
Sunrise07:00
Sunset19:53
Sat · Tomorrow Thunderstorms
90°69°8.2 mm⌄
Wind13 mph W
Gusts26 mph
UV index8 – High
Precip chance73%
Sunrise07:01
Sunset19:52
Sunday 6/9 Showers
79°65°1.8 mm⌄
Wind5 mph NE
Gusts15 mph
UV index6 – High
Precip chance73%
Sunrise07:02
Sunset19:50
Monday 7/9 Mostly cloudy
79°65°13%⌄
Wind10 mph SE
Gusts24 mph
UV index7 – High
Precip chance13%
Sunrise07:03
Sunset19:48
Tuesday 8/9 Mostly cloudy
84°61°15%⌄
Wind4 mph SE
Gusts15 mph
UV index7 – High
Precip chance15%
Sunrise07:04
Sunset19:47
Wednesday 9/9 Sunny
88°66°5%⌄
Wind8 mph W
Gusts15 mph
UV index8 – Very high
Precip chance5%
Sunrise07:04
Sunset19:45
Thursday 10/9 Sunny
94°68°35.3 mm⌄
Wind10 mph W
Gusts21 mph
UV index8 – Very high
Precip chance73%
Sunrise07:05
Sunset19:44
Friday 11/9 Showers
80°64°3.4 mm⌄
Wind9 mph N
Gusts16 mph
UV index7 – High
Precip chance74%
Sunrise07:06
Sunset19:42
Saturday 12/9 Sunny
80°59°4%⌄
Wind6 mph N
Gusts14 mph
UV index7 – High
Precip chance4%
Sunrise07:07
Sunset19:41
Sunday 13/9 Sunny
85°59°2%⌄
Wind4 mph SE
Gusts15 mph
UV index7 – High
Precip chance2%
Sunrise07:08
Sunset19:39
Monday 14/9 Sunny
91°64°6.0 mm⌄
Wind10 mph N
Gusts28 mph
UV index8 – Very high
Precip chance63%
Sunrise07:09
Sunset19:38
Tuesday 15/9 Showers
83°69°2.7 mm⌄
Wind9 mph W
Gusts15 mph
UV index7 – High
Precip chance75%
Sunrise07:10
Sunset19:36
Wednesday 16/9 Sunny
88°68°2.7 mm⌄
Wind5 mph SW
Gusts7 mph
UV index8 – Very high
Precip chance61%
Sunrise07:10
Sunset19:35
Thursday 17/9 Sunny
91°70°1.2 mm⌄
Wind4 mph W
Gusts14 mph
UV index8 – Very high
Precip chance57%
Sunrise07:11
Sunset19:33
Friday 18/9 Rain (climatological)
83°64°16.8 mm⌄
Day≈78–89°
Night≈58–69°
Precip≈5.2 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
88°67°20%⌄
Day≈83–94°
Night≈61–72°
Precip≈5.2 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
91°68°20%⌄
Day≈85–96°
Night≈63–74°
Precip≈5.2 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Rain (climatological)
91°68°17.7 mm⌄
Day≈85–96°
Night≈63–73°
Precip≈5.2 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
85°65°20%⌄
Day≈80–91°
Night≈60–71°
Precip≈5.2 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
83°64°20%⌄
Day≈78–88°
Night≈58–69°
Precip≈5.2 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Rain (climatological)
84°64°10.6 mm⌄
Day≈79–90°
Night≈59–70°
Precip≈5.2 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
87°66°20%⌄
Day≈82–93°
Night≈61–72°
Precip≈5.2 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
89°67°20%⌄
Day≈84–95°
Night≈62–73°
Precip≈5.2 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Rain (climatological)
89°67°16.4 mm⌄
Day≈84–95°
Night≈62–73°
Precip≈5.2 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
88°66°20%⌄
Day≈82–93°
Night≈61–72°
Precip≈5.2 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Partly cloudy (climatological)
82°63°20%⌄
Day≈77–88°
Night≈58–69°
Precip≈5.2 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Rain (climatological)
81°62°7.5 mm⌄
Day≈76–87°
Night≈57–68°
Precip≈5.2 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 1/10 Partly cloudy (climatological)
71°53°20%⌄
Day≈65–76°
Night≈48–59°
Precip≈5.2 in / October
(climatological)Typical range for these dates · 1991–2020
Friday 2/10 Partly cloudy (climatological)
77°57°20%⌄
Day≈71–82°
Night≈51–62°
Precip≈5.2 in / October
(climatological)Typical range for these dates · 1991–2020
Saturday 3/10 Rain (climatological)
80°59°13.7 mm⌄
Day≈75–85°
Night≈53–64°
Precip≈5.2 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 Mount Gay-Shamrock, 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.