Chestnut Hill · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Chestnut Hill & 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
95°
Thu, Sep 10
Coldest night
60°
Sun, Sep 6
Days with precip
7 / 14
of 14 forecast days
Nicest day
Mon, Sep 7
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 29 – Sun 30 Aug
88° 69°
10% precip chance
Sat 5 – Sun 6 Sep
70° 60°
87% precip chance
Sat 12 – Sun 13 Sep
81° 63°
typical range
Sat 19 – Sun 20 Sep
83° 64°
typical range
30 days — Chestnut Hill
14 forecast + 16 climatology
Fri · Today Drizzle
87°67°6.8 mm⌄
Wind8 mph NW
Gusts19 mph
UV index7 – High
Precip chance80%
Sunrise06:24
Sunset19:39
Sat · Tomorrow Mostly cloudy
86°69°10%⌄
Wind8 mph NW
Gusts18 mph
UV index7 – High
Precip chance10%
Sunrise06:25
Sunset19:37
Sunday 30/8 Sunny
88°69°7%⌄
Wind10 mph SW
Gusts19 mph
UV index8 – Very high
Precip chance7%
Sunrise06:26
Sunset19:36
Monday 31/8 Mostly cloudy
93°72°16%⌄
Wind8 mph W
Gusts22 mph
UV index7 – High
Precip chance16%
Sunrise06:27
Sunset19:34
Tuesday 1/9 Mostly cloudy
91°72°2.7 mm⌄
Wind10 mph W
Gusts26 mph
UV index8 – Very high
Precip chance69%
Sunrise06:28
Sunset19:33
Wednesday 2/9 Showers
88°71°11.9 mm⌄
Wind17 mph NW
Gusts30 mph
UV index8 – Very high
Precip chance86%
Sunrise06:29
Sunset19:31
Thursday 3/9 Mostly cloudy
87°68°8.0 mm⌄
Wind13 mph W
Gusts22 mph
UV index7 – High
Precip chance77%
Sunrise06:30
Sunset19:29
Friday 4/9 Sunny
80°69°5%⌄
Wind11 mph N
Gusts20 mph
UV index7 – High
Precip chance5%
Sunrise06:31
Sunset19:28
Saturday 5/9 Mostly cloudy
70°62°1.4 mm⌄
Wind6 mph NE
Gusts14 mph
UV index5 – Moderate
Precip chance59%
Sunrise06:32
Sunset19:26
Sunday 6/9 Showers
65°60°5.9 mm⌄
Wind5 mph SE
Gusts15 mph
UV index4 – Moderate
Precip chance87%
Sunrise06:33
Sunset19:24
Monday 7/9 Partly cloudy
78°63°6%⌄
Wind8 mph S
Gusts15 mph
UV index7 – High
Precip chance6%
Sunrise06:34
Sunset19:23
Tuesday 8/9 Partly cloudy
85°65°0.3 mm⌄
Wind9 mph S
Gusts23 mph
UV index7 – High
Precip chance36%
Sunrise06:35
Sunset19:21
Wednesday 9/9 Mostly cloudy
92°70°0.2 mm⌄
Wind8 mph S
Gusts23 mph
UV index8 – Very high
Precip chance24%
Sunrise06:36
Sunset19:20
Thursday 10/9 Sunny
95°76°2.5 mm⌄
Wind8 mph SW
Gusts13 mph
UV index9 – Very high
Precip chance57%
Sunrise06:37
Sunset19:18
Friday 11/9 Rain (climatological)
78°62°7.5 mm⌄
Day≈73–83°
Night≈57–67°
Precip≈3.4 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Partly cloudy (climatological)
79°63°20%⌄
Day≈74–84°
Night≈57–68°
Precip≈3.4 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
81°64°20%⌄
Day≈75–86°
Night≈58–69°
Precip≈3.4 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Rain (climatological)
82°65°8.0 mm⌄
Day≈77–87°
Night≈59–70°
Precip≈3.4 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
73°59°20%⌄
Day≈67–78°
Night≈54–64°
Precip≈3.4 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
72°58°20%⌄
Day≈67–77°
Night≈53–64°
Precip≈3.4 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Rain (climatological)
74°60°6.6 mm⌄
Day≈69–80°
Night≈54–65°
Precip≈3.4 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
75°60°20%⌄
Day≈69–80°
Night≈55–65°
Precip≈3.4 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
83°65°20%⌄
Day≈78–89°
Night≈60–71°
Precip≈3.4 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Rain (climatological)
80°64°9.7 mm⌄
Day≈75–86°
Night≈58–69°
Precip≈3.4 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
82°64°20%⌄
Day≈76–87°
Night≈59–70°
Precip≈3.4 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
76°61°20%⌄
Day≈71–82°
Night≈56–66°
Precip≈3.4 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Rain (climatological)
71°58°10.9 mm⌄
Day≈66–76°
Night≈53–63°
Precip≈3.4 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
75°60°20%⌄
Day≈69–80°
Night≈55–65°
Precip≈3.4 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
76°61°20%⌄
Day≈70–81°
Night≈55–66°
Precip≈3.4 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Rain (climatological)
83°65°4.6 mm⌄
Day≈78–89°
Night≈60–71°
Precip≈3.4 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 Chestnut Hill, 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.