Nitro · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Nitro & 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
87°
Fri, Aug 21
Coldest night
50°
Thu, Aug 27
Days with precip
6 / 14
of 14 forecast days
Nicest day
Sat, Aug 29
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 22 – Sun 23 Aug
86° 63°
67% precip chance
Sat 29 – Sun 30 Aug
83° 56°
8% precip chance
Sat 5 – Sun 6 Sep
81° 58°
typical range
Sat 12 – Sun 13 Sep
79° 56°
typical range
30 days — Nitro
14 forecast + 16 climatology
Thu · Today Mostly cloudy
84°69°5.3 mm⌄
Wind7 mph NW
Gusts13 mph
UV index7 – High
Precip chance78%
Sunrise06:46
Sunset20:15
Fri · Tomorrow Fog
87°66°1.9 mm⌄
Wind5 mph N
Gusts14 mph
UV index7 – High
Precip chance57%
Sunrise06:47
Sunset20:13
Saturday 22/8 Sunny
86°65°3.5 mm⌄
Wind8 mph SW
Gusts11 mph
UV index8 – High
Precip chance67%
Sunrise06:48
Sunset20:12
Sunday 23/8 Sunny
82°63°17%⌄
Wind8 mph N
Gusts19 mph
UV index8 – High
Precip chance17%
Sunrise06:49
Sunset20:11
Monday 24/8 Sunny
86°61°4%⌄
Wind5 mph NE
Gusts14 mph
UV index7 – High
Precip chance4%
Sunrise06:49
Sunset20:09
Tuesday 25/8 Mostly cloudy
87°67°10%⌄
Wind5 mph SW
Gusts15 mph
UV index7 – High
Precip chance10%
Sunrise06:50
Sunset20:08
Wednesday 26/8 Showers
80°61°7.0 mm⌄
Wind9 mph N
Gusts21 mph
UV index6 – High
Precip chance87%
Sunrise06:51
Sunset20:06
Thursday 27/8 Mostly cloudy
62°50°1.2 mm⌄
Wind9 mph SW
Gusts23 mph
UV index4 – Moderate
Precip chance63%
Sunrise06:52
Sunset20:05
Friday 28/8 Fog
69°56°0.7 mm⌄
Wind7 mph W
Gusts19 mph
UV index5 – Moderate
Precip chance54%
Sunrise06:53
Sunset20:03
Saturday 29/8 Sunny
77°56°8%⌄
Wind4 mph N
Gusts12 mph
UV index7 – High
Precip chance8%
Sunrise06:54
Sunset20:02
Sunday 30/8 Sunny
83°56°6%⌄
Wind4 mph NE
Gusts4 mph
UV index7 – High
Precip chance6%
Sunrise06:55
Sunset20:00
Monday 31/8 Mostly cloudy
86°63°1.1 mm⌄
Wind10 mph W
Gusts26 mph
UV index7 – High
Precip chance57%
Sunrise06:56
Sunset19:59
Tuesday 1/9 Mostly cloudy
83°65°0.8 mm⌄
Wind7 mph N
Gusts25 mph
UV index7 – High
Precip chance56%
Sunrise06:56
Sunset19:57
Wednesday 2/9 Mostly cloudy
83°65°13%⌄
Wind9 mph SW
Gusts12 mph
UV index7 – High
Precip chance13%
Sunrise06:57
Sunset19:56
Thursday 3/9 Rain (climatological)
74°56°2.7 mm⌄
Day≈69–79°
Night≈50–61°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 4/9 Partly cloudy (climatological)
77°58°20%⌄
Day≈72–83°
Night≈52–63°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 5/9 Partly cloudy (climatological)
81°60°20%⌄
Day≈75–86°
Night≈54–65°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 6/9 Rain (climatological)
77°58°2.4 mm⌄
Day≈72–83°
Night≈52–63°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 7/9 Partly cloudy (climatological)
72°54°20%⌄
Day≈66–77°
Night≈49–60°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Partly cloudy (climatological)
70°53°20%⌄
Day≈64–75°
Night≈48–58°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Rain (climatological)
73°55°4.2 mm⌄
Day≈67–78°
Night≈50–60°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Partly cloudy (climatological)
76°57°20%⌄
Day≈71–81°
Night≈51–62°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Partly cloudy (climatological)
78°58°20%⌄
Day≈73–83°
Night≈53–64°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Rain (climatological)
79°59°4.5 mm⌄
Day≈74–85°
Night≈53–64°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
75°56°20%⌄
Day≈70–81°
Night≈51–62°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
70°53°20%⌄
Day≈65–76°
Night≈48–59°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Rain (climatological)
70°53°2.5 mm⌄
Day≈64–75°
Night≈48–58°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
69°53°20%⌄
Day≈63–74°
Night≈47–58°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
73°55°20%⌄
Day≈67–78°
Night≈49–60°
Precip≈1.9 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Rain (climatological)
79°59°3.4 mm⌄
Day≈74–85°
Night≈53–64°
Precip≈1.9 in / September
(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 Nitro, 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.