Arlington Heights · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Arlington Heights & 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
96°
Thu, Sep 3
Coldest night
58°
Wed, Sep 16
Days with precip
5 / 14
of 14 forecast days
Nicest day
Wed, Sep 16
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
86° 69°
80% precip chance
Sat 12 – Sun 13 Sep
94° 67°
57% precip chance
Sat 19 – Sun 20 Sep
91° 68°
typical range
Sat 26 – Sun 27 Sep
91° 68°
typical range
30 days — Arlington Heights
14 forecast + 16 climatology
Thu · Today Sunny
96°77°0.1 mm⌄
Wind10 mph SW
Gusts34 mph
UV index6 – Moderate
Precip chance17%
Sunrise06:19
Sunset19:22
Fri · Tomorrow Thunderstorms
90°70°2.0 mm⌄
Wind11 mph NE
Gusts27 mph
UV index5 – Moderate
Precip chance60%
Sunrise06:20
Sunset19:21
Saturday 5/9 Sunny
85°73°2.6 mm⌄
Wind14 mph NE
Gusts21 mph
UV index7 – High
Precip chance61%
Sunrise06:21
Sunset19:19
Sunday 6/9 Showers
86°69°11.3 mm⌄
Wind8 mph NE
Gusts21 mph
UV index7 – High
Precip chance80%
Sunrise06:22
Sunset19:17
Monday 7/9 Mostly cloudy
86°64°11%⌄
Wind7 mph SE
Gusts19 mph
UV index7 – High
Precip chance11%
Sunrise06:23
Sunset19:16
Tuesday 8/9 Mostly cloudy
92°76°9%⌄
Wind13 mph SW
Gusts37 mph
UV index8 – Very high
Precip chance9%
Sunrise06:24
Sunset19:14
Wednesday 9/9 Sunny
86°69°2%⌄
Wind15 mph SW
Gusts39 mph
UV index7 – High
Precip chance2%
Sunrise06:25
Sunset19:12
Thursday 10/9 Sunny
73°60°5%⌄
Wind8 mph N
Gusts19 mph
UV index6 – High
Precip chance5%
Sunrise06:26
Sunset19:10
Friday 11/9 Sunny
80°61°4%⌄
Wind8 mph SE
Gusts20 mph
UV index7 – High
Precip chance4%
Sunrise06:27
Sunset19:09
Saturday 12/9 Mostly cloudy
85°67°1.2 mm⌄
Wind14 mph S
Gusts38 mph
UV index6 – High
Precip chance57%
Sunrise06:29
Sunset19:07
Sunday 13/9 Sunny
94°78°2.7 mm⌄
Wind14 mph SW
Gusts37 mph
UV index8 – Very high
Precip chance57%
Sunrise06:30
Sunset19:05
Monday 14/9 Sunny
89°70°1%⌄
Wind10 mph N
Gusts17 mph
UV index8 – Very high
Precip chance1%
Sunrise06:31
Sunset19:03
Tuesday 15/9 Sunny
79°62°1%⌄
Wind7 mph SW
Gusts17 mph
UV index7 – High
Precip chance1%
Sunrise06:32
Sunset19:02
Wednesday 16/9 Sunny
70°58°3%⌄
Wind10 mph NE
Gusts19 mph
UV index6 – High
Precip chance3%
Sunrise06:33
Sunset19:00
Thursday 17/9 Rain (climatological)
83°67°4.3 mm⌄
Day≈78–89°
Night≈62–73°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
88°70°20%⌄
Day≈82–93°
Night≈64–75°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
91°72°20%⌄
Day≈85–96°
Night≈66–77°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Rain (climatological)
84°68°3.4 mm⌄
Day≈79–90°
Night≈62–73°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
83°67°20%⌄
Day≈77–88°
Night≈61–72°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
79°64°20%⌄
Day≈73–84°
Night≈59–70°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Rain (climatological)
83°67°4.2 mm⌄
Day≈77–88°
Night≈61–72°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
87°69°20%⌄
Day≈82–93°
Night≈64–75°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
89°70°20%⌄
Day≈83–94°
Night≈65–76°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Rain (climatological)
91°72°2.3 mm⌄
Day≈86–97°
Night≈67–77°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
84°68°20%⌄
Day≈79–90°
Night≈62–73°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
83°67°20%⌄
Day≈78–88°
Night≈62–72°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Rain (climatological)
82°66°5.3 mm⌄
Day≈77–88°
Night≈61–72°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Partly cloudy (climatological)
82°66°20%⌄
Day≈76–87°
Night≈61–72°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 1/10 Partly cloudy (climatological)
73°56°20%⌄
Day≈67–78°
Night≈51–62°
Precip≈1.7 in / October
(climatological)Typical range for these dates · 1991–2020
Friday 2/10 Rain (climatological)
75°58°4.9 mm⌄
Day≈69–80°
Night≈52–63°
Precip≈1.7 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 Arlington Heights, 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.