Royston · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Royston & 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
99°
Thu, Sep 3
Coldest night
67°
Tue, Aug 25
Days with precip
6 / 14
of 14 forecast days
Nicest day
Sun, Aug 23
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 22 – Sun 23 Aug
96° 70°
7% precip chance
Sat 29 – Sun 30 Aug
92° 74°
41% precip chance
Sat 5 – Sun 6 Sep
87° 67°
typical range
Sat 12 – Sun 13 Sep
92° 66°
typical range
30 days — Royston
14 forecast + 16 climatology
Sat · Today Sunny
96°71°7%⌄
Wind13 mph W
Gusts24 mph
UV index9 – Very high
Precip chance7%
Sunrise06:58
Sunset20:11
Sun · Tomorrow Sunny
93°70°1%⌄
Wind10 mph NW
Gusts21 mph
UV index9 – Very high
Precip chance1%
Sunrise06:59
Sunset20:10
Monday 24/8 Mostly cloudy
89°69°0.5 mm⌄
Wind19 mph W
Gusts26 mph
UV index9 – Very high
Precip chance40%
Sunrise07:00
Sunset20:09
Tuesday 25/8 Showers
84°67°2.2 mm⌄
Wind10 mph W
Gusts19 mph
UV index9 – Very high
Precip chance65%
Sunrise07:00
Sunset20:08
Wednesday 26/8 Mostly cloudy
92°70°12.9 mm⌄
Wind11 mph W
Gusts15 mph
UV index8 – Very high
Precip chance72%
Sunrise07:01
Sunset20:06
Thursday 27/8 Showers
82°71°18.5 mm⌄
Wind11 mph W
Gusts23 mph
UV index6 – High
Precip chance88%
Sunrise07:02
Sunset20:05
Friday 28/8 Sunny
92°71°5%⌄
Wind10 mph W
Gusts14 mph
UV index8 – Very high
Precip chance5%
Sunrise07:03
Sunset20:04
Saturday 29/8 Mostly cloudy
86°76°0.9 mm⌄
Wind9 mph W
Gusts13 mph
UV index7 – High
Precip chance41%
Sunrise07:03
Sunset20:02
Sunday 30/8 Mostly cloudy
92°74°17%⌄
Wind8 mph NW
Gusts10 mph
UV index7 – High
Precip chance17%
Sunrise07:04
Sunset20:01
Monday 31/8 Mostly cloudy
97°77°0.3 mm⌄
Wind13 mph SW
Gusts19 mph
UV index9 – Very high
Precip chance36%
Sunrise07:05
Sunset20:00
Tuesday 1/9 Sunny
97°75°0.3 mm⌄
Wind12 mph NE
Gusts21 mph
UV index9 – Very high
Precip chance36%
Sunrise07:05
Sunset19:59
Wednesday 2/9 Mostly cloudy
84°75°1.2 mm⌄
Wind6 mph E
Gusts12 mph
UV index6 – High
Precip chance60%
Sunrise07:06
Sunset19:57
Thursday 3/9 Sunny
99°73°5.0 mm⌄
Wind5 mph NE
Gusts10 mph
UV index9 – Very high
Precip chance59%
Sunrise07:07
Sunset19:56
Friday 4/9 Showers
87°71°1.7 mm⌄
Wind10 mph NW
Gusts21 mph
UV index8 – Very high
Precip chance62%
Sunrise07:08
Sunset19:54
Saturday 5/9 Rain (climatological)
83°67°11.1 mm⌄
Day≈78–89°
Night≈61–72°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 6/9 Partly cloudy (climatological)
87°68°20%⌄
Day≈81–92°
Night≈63–74°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 7/9 Partly cloudy (climatological)
88°69°20%⌄
Day≈83–94°
Night≈64–75°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Rain (climatological)
85°67°4.8 mm⌄
Day≈80–91°
Night≈62–73°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Partly cloudy (climatological)
84°67°20%⌄
Day≈79–90°
Night≈62–73°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Partly cloudy (climatological)
83°66°20%⌄
Day≈77–88°
Night≈61–71°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Rain (climatological)
80°65°4.8 mm⌄
Day≈75–85°
Night≈59–70°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Partly cloudy (climatological)
83°66°20%⌄
Day≈78–89°
Night≈61–72°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
92°71°20%⌄
Day≈86–97°
Night≈66–77°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Rain (climatological)
91°71°12.4 mm⌄
Day≈85–96°
Night≈65–76°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
90°71°20%⌄
Day≈85–96°
Night≈65–76°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
86°68°20%⌄
Day≈81–92°
Night≈63–74°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Rain (climatological)
83°66°12.0 mm⌄
Day≈77–88°
Night≈61–71°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
82°66°20%⌄
Day≈77–88°
Night≈60–71°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
87°69°20%⌄
Day≈82–92°
Night≈63–74°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Rain (climatological)
89°70°7.9 mm⌄
Day≈84–95°
Night≈65–75°
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 Royston, 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.