Sumner · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Sumner & 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
90°
Thu, Aug 20
Coldest night
50°
Sun, Aug 30
Days with precip
1 / 14
of 14 forecast days
Nicest day
Fri, Aug 28
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 22 – Sun 23 Aug
79° 55°
31% precip chance
Sat 29 – Sun 30 Aug
69° 50°
16% precip chance
Sat 5 – Sun 6 Sep
67° 43°
typical range
Sat 12 – Sun 13 Sep
68° 44°
typical range
30 days — Sumner
14 forecast + 16 climatology
Tue · Today Sunny
85°57°8%⌄
Wind10 mph W
Gusts21 mph
UV index7 – High
Precip chance8%
Sunrise06:09
Sunset20:15
Wed · Tomorrow Sunny
83°55°7%⌄
Wind4 mph SW
Gusts13 mph
UV index7 – High
Precip chance7%
Sunrise06:11
Sunset20:13
Thursday 20/8 Sunny
90°57°4%⌄
Wind6 mph N
Gusts15 mph
UV index7 – High
Precip chance4%
Sunrise06:12
Sunset20:12
Friday 21/8 Mostly cloudy
83°62°0.1 mm⌄
Wind7 mph W
Gusts16 mph
UV index5 – Moderate
Precip chance19%
Sunrise06:13
Sunset20:10
Saturday 22/8 Sunny
69°55°0.3 mm⌄
Wind8 mph SW
Gusts15 mph
UV index5 – Moderate
Precip chance31%
Sunrise06:15
Sunset20:08
Sunday 23/8 Sunny
79°55°5%⌄
Wind9 mph N
Gusts13 mph
UV index7 – High
Precip chance5%
Sunrise06:16
Sunset20:06
Monday 24/8 Mostly cloudy
86°56°8%⌄
Wind6 mph N
Gusts15 mph
UV index7 – High
Precip chance8%
Sunrise06:17
Sunset20:04
Tuesday 25/8 Mostly cloudy
85°56°7%⌄
Wind7 mph N
Gusts18 mph
UV index7 – High
Precip chance7%
Sunrise06:19
Sunset20:03
Wednesday 26/8 Mostly cloudy
83°59°11%⌄
Wind7 mph W
Gusts15 mph
UV index6 – High
Precip chance11%
Sunrise06:20
Sunset20:01
Thursday 27/8 Sunny
77°53°6%⌄
Wind13 mph W
Gusts15 mph
UV index6 – High
Precip chance6%
Sunrise06:21
Sunset19:59
Friday 28/8 Sunny
75°53°6%⌄
Wind5 mph SW
Gusts12 mph
UV index6 – High
Precip chance6%
Sunrise06:23
Sunset19:57
Saturday 29/8 Mostly cloudy
67°51°16%⌄
Wind10 mph W
Gusts16 mph
UV index4 – Moderate
Precip chance16%
Sunrise06:24
Sunset19:55
Sunday 30/8 Mostly cloudy
69°50°15%⌄
Wind11 mph SW
Gusts18 mph
UV index6 – High
Precip chance15%
Sunrise06:25
Sunset19:53
Monday 31/8 Showers
64°51°4.5 mm⌄
Wind8 mph SW
Gusts12 mph
UV index5 – Moderate
Precip chance75%
Sunrise06:26
Sunset19:51
Tuesday 1/9 Light rain (climatological)
70°47°1.8 mm⌄
Day≈65–75°
Night≈42–52°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 2/9 Partly cloudy (climatological)
71°47°20%⌄
Day≈65–76°
Night≈42–53°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 3/9 Partly cloudy (climatological)
73°49°20%⌄
Day≈67–78°
Night≈43–54°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 4/9 Light rain (climatological)
71°48°1.4 mm⌄
Day≈66–77°
Night≈42–53°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 5/9 Partly cloudy (climatological)
67°45°20%⌄
Day≈61–72°
Night≈40–51°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 6/9 Partly cloudy (climatological)
63°43°20%⌄
Day≈58–69°
Night≈38–48°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 7/9 Light rain (climatological)
67°45°1.9 mm⌄
Day≈62–72°
Night≈40–51°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Partly cloudy (climatological)
68°46°20%⌄
Day≈62–73°
Night≈40–51°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Partly cloudy (climatological)
73°49°20%⌄
Day≈68–79°
Night≈44–54°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Light rain (climatological)
72°48°1.8 mm⌄
Day≈67–78°
Night≈43–54°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Partly cloudy (climatological)
68°46°20%⌄
Day≈62–73°
Night≈40–51°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Partly cloudy (climatological)
68°46°20%⌄
Day≈63–73°
Night≈40–51°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Light rain (climatological)
65°44°1.9 mm⌄
Day≈59–70°
Night≈38–49°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
66°45°20%⌄
Day≈61–72°
Night≈40–50°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
67°45°20%⌄
Day≈61–72°
Night≈40–50°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Light rain (climatological)
73°49°1.6 mm⌄
Day≈68–78°
Night≈43–54°
Precip≈0.6 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 Sumner, 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.