Crystal · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Crystal & 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
93°
Fri, Aug 21
Coldest night
57°
Mon, Aug 17
Days with precip
5 / 14
of 14 forecast days
Nicest day
Wed, Aug 26
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 22 – Sun 23 Aug
87° 67°
69% precip chance
Sat 29 – Sun 30 Aug
89° 65°
67% precip chance
Sat 5 – Sun 6 Sep
76° 55°
typical range
Sat 12 – Sun 13 Sep
77° 54°
typical range
30 days — Crystal
14 forecast + 16 climatology
Mon · Today Sunny
92°57°4%⌄
Wind11 mph S
Gusts30 mph
UV index7 – High
Precip chance4%
Sunrise06:17
Sunset20:17
Tue · Tomorrow Mostly cloudy
84°63°16.9 mm⌄
Wind13 mph N
Gusts26 mph
UV index6 – High
Precip chance73%
Sunrise06:18
Sunset20:15
Wednesday 19/8 Mostly cloudy
84°62°5%⌄
Wind8 mph E
Gusts18 mph
UV index7 – High
Precip chance5%
Sunrise06:20
Sunset20:14
Thursday 20/8 Mostly cloudy
87°65°0.3 mm⌄
Wind9 mph SW
Gusts13 mph
UV index7 – High
Precip chance17%
Sunrise06:21
Sunset20:12
Friday 21/8 Showers
93°67°0.8 mm⌄
Wind9 mph SW
Gusts26 mph
UV index7 – High
Precip chance36%
Sunrise06:22
Sunset20:10
Saturday 22/8 Sunny
87°67°17%⌄
Wind7 mph N
Gusts17 mph
UV index8 – Very high
Precip chance17%
Sunrise06:23
Sunset20:09
Sunday 23/8 Mostly cloudy
87°67°10.5 mm⌄
Wind11 mph SW
Gusts22 mph
UV index7 – High
Precip chance69%
Sunrise06:24
Sunset20:07
Monday 24/8 Partly cloudy
90°66°10.1 mm⌄
Wind6 mph S
Gusts11 mph
UV index8 – Very high
Precip chance71%
Sunrise06:26
Sunset20:05
Tuesday 25/8 Sunny
84°62°1.2 mm⌄
Wind9 mph N
Gusts18 mph
UV index7 – High
Precip chance57%
Sunrise06:27
Sunset20:03
Wednesday 26/8 Sunny
82°66°1%⌄
Wind9 mph NE
Gusts20 mph
UV index7 – High
Precip chance1%
Sunrise06:28
Sunset20:02
Thursday 27/8 Sunny
84°63°3%⌄
Wind6 mph SE
Gusts18 mph
UV index7 – High
Precip chance3%
Sunrise06:29
Sunset20:00
Friday 28/8 Sunny
88°66°2%⌄
Wind11 mph S
Gusts21 mph
UV index8 – Very high
Precip chance2%
Sunrise06:30
Sunset19:58
Saturday 29/8 Mostly cloudy
86°65°7%⌄
Wind11 mph S
Gusts24 mph
UV index7 – High
Precip chance7%
Sunrise06:32
Sunset19:56
Sunday 30/8 Mostly cloudy
89°67°3.0 mm⌄
Wind9 mph S
Gusts25 mph
UV index7 – High
Precip chance67%
Sunrise06:33
Sunset19:54
Monday 31/8 Rain (climatological)
90°66°8.7 mm⌄
Day≈84–95°
Night≈61–71°
Precip≈3.7 in / August
(climatological)Typical range for these dates · 1991–2020
Tuesday 1/9 Partly cloudy (climatological)
83°60°20%⌄
Day≈78–89°
Night≈54–65°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 2/9 Partly cloudy (climatological)
80°58°20%⌄
Day≈75–86°
Night≈53–63°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 3/9 Rain (climatological)
82°59°11.8 mm⌄
Day≈76–87°
Night≈53–64°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 4/9 Partly cloudy (climatological)
78°57°20%⌄
Day≈73–84°
Night≈51–62°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 5/9 Partly cloudy (climatological)
76°55°20%⌄
Day≈70–81°
Night≈50–61°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 6/9 Rain (climatological)
75°55°11.8 mm⌄
Day≈70–81°
Night≈50–60°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 7/9 Partly cloudy (climatological)
77°56°20%⌄
Day≈72–83°
Night≈51–62°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Partly cloudy (climatological)
84°60°20%⌄
Day≈78–89°
Night≈55–65°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Rain (climatological)
81°58°5.3 mm⌄
Day≈75–86°
Night≈53–64°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Partly cloudy (climatological)
80°57°20%⌄
Day≈74–85°
Night≈52–63°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Partly cloudy (climatological)
75°55°20%⌄
Day≈70–81°
Night≈49–60°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Rain (climatological)
74°54°6.8 mm⌄
Day≈68–79°
Night≈48–59°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
77°56°20%⌄
Day≈71–82°
Night≈51–61°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
76°55°20%⌄
Day≈70–81°
Night≈50–61°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Rain (climatological)
82°59°8.7 mm⌄
Day≈76–87°
Night≈53–64°
Precip≈3.7 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 Crystal, 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.