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
71°
Tue, Sep 15
Coldest night
48°
Fri, Sep 4
Days with precip
2 / 14
of 14 forecast days
Nicest day
Mon, Sep 7
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
68° 48°
49% precip chance
Sat 12 – Sun 13 Sep
71° 52°
20% precip chance
Sat 19 – Sun 20 Sep
71° 51°
typical range
Sat 26 – Sun 27 Sep
67° 49°
typical range
30 days — Arlington Heights
14 forecast + 16 climatology
Wed · Today Showers
71°57°9.8 mm⌄
Wind13 mph SE
Gusts28 mph
UV index4 – Moderate
Precip chance78%
Sunrise06:27
Sunset19:48
Thu · Tomorrow Showers
65°51°6.3 mm⌄
Wind11 mph SE
Gusts25 mph
UV index3 – Moderate
Precip chance75%
Sunrise06:28
Sunset19:46
Friday 4/9 Fog
64°48°0.4 mm⌄
Wind5 mph SW
Gusts15 mph
UV index3 – Moderate
Precip chance45%
Sunrise06:30
Sunset19:44
Saturday 5/9 Partly cloudy
58°51°0.3 mm⌄
Wind4 mph W
Gusts15 mph
UV index3 – Moderate
Precip chance49%
Sunrise06:31
Sunset19:42
Sunday 6/9 Sunny
68°48°11%⌄
Wind9 mph W
Gusts18 mph
UV index4 – Moderate
Precip chance11%
Sunrise06:33
Sunset19:40
Monday 7/9 Sunny
70°50°5%⌄
Wind6 mph W
Gusts14 mph
UV index6 – High
Precip chance5%
Sunrise06:34
Sunset19:38
Tuesday 8/9 Mostly cloudy
65°52°18%⌄
Wind6 mph W
Gusts9 mph
UV index4 – Moderate
Precip chance18%
Sunrise06:35
Sunset19:36
Wednesday 9/9 Mostly cloudy
69°52°13%⌄
Wind6 mph W
Gusts17 mph
UV index6 – High
Precip chance13%
Sunrise06:37
Sunset19:34
Thursday 10/9 Sunny
70°53°10%⌄
Wind5 mph W
Gusts15 mph
UV index6 – High
Precip chance10%
Sunrise06:38
Sunset19:31
Friday 11/9 Mostly cloudy
65°54°19%⌄
Wind6 mph SW
Gusts13 mph
UV index5 – Moderate
Precip chance19%
Sunrise06:39
Sunset19:29
Saturday 12/9 Mostly cloudy
67°54°20%⌄
Wind7 mph S
Gusts11 mph
UV index5 – Moderate
Precip chance20%
Sunrise06:41
Sunset19:27
Sunday 13/9 Mostly cloudy
71°52°12%⌄
Wind7 mph SW
Gusts15 mph
UV index6 – High
Precip chance12%
Sunrise06:42
Sunset19:25
Monday 14/9 Sunny
69°54°12%⌄
Wind8 mph W
Gusts19 mph
UV index6 – High
Precip chance12%
Sunrise06:44
Sunset19:23
Tuesday 15/9 Sunny
71°53°10%⌄
Wind8 mph W
Gusts11 mph
UV index6 – High
Precip chance10%
Sunrise06:45
Sunset19:21
Wednesday 16/9 Rain (climatological)
69°53°2.2 mm⌄
Day≈64–74°
Night≈47–58°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
69°53°20%⌄
Day≈63–74°
Night≈47–58°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
72°55°20%⌄
Day≈67–77°
Night≈49–60°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Rain (climatological)
71°54°3.0 mm⌄
Day≈66–76°
Night≈49–60°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
66°51°20%⌄
Day≈60–71°
Night≈46–56°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
62°49°20%⌄
Day≈56–67°
Night≈43–54°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Rain (climatological)
65°51°2.8 mm⌄
Day≈60–71°
Night≈46–56°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
67°52°20%⌄
Day≈62–73°
Night≈46–57°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
73°55°20%⌄
Day≈67–78°
Night≈50–60°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Light rain (climatological)
74°56°1.8 mm⌄
Day≈68–79°
Night≈50–61°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
67°52°20%⌄
Day≈62–73°
Night≈46–57°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
63°49°20%⌄
Day≈58–68°
Night≈44–55°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Rain (climatological)
61°48°3.7 mm⌄
Day≈56–66°
Night≈43–53°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Partly cloudy (climatological)
65°50°20%⌄
Day≈59–70°
Night≈45–56°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Partly cloudy (climatological)
69°53°20%⌄
Day≈64–75°
Night≈48–59°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 1/10 Light rain (climatological)
53°38°2.0 mm⌄
Day≈48–59°
Night≈33–44°
Precip≈1.4 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.