Merton · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Merton & 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°
Wed, Sep 2
Coldest night
47°
Sat, Sep 12
Days with precip
4 / 14
of 14 forecast days
Nicest day
Sun, Sep 13
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
80° 68°
80% precip chance
Sat 12 – Sun 13 Sep
68° 47°
9% precip chance
Sat 19 – Sun 20 Sep
67° 50°
typical range
Sat 26 – Sun 27 Sep
65° 52°
typical range
30 days — Merton
14 forecast + 16 climatology
Mon · Today Mostly cloudy
86°70°5.9 mm⌄
Wind15 mph SW
Gusts31 mph
UV index7 – High
Precip chance80%
Sunrise06:16
Sunset19:30
Tue · Tomorrow Thunderstorms
89°71°0.4 mm⌄
Wind14 mph W
Gusts30 mph
UV index7 – High
Precip chance43%
Sunrise06:17
Sunset19:28
Wednesday 2/9 Sunny
90°70°9%⌄
Wind13 mph SW
Gusts18 mph
UV index6 – High
Precip chance9%
Sunrise06:18
Sunset19:27
Thursday 3/9 Sunny
74°69°3.6 mm⌄
Wind10 mph SE
Gusts19 mph
UV index7 – High
Precip chance75%
Sunrise06:19
Sunset19:25
Friday 4/9 Thunderstorms
86°66°5.6 mm⌄
Wind16 mph S
Gusts26 mph
UV index6 – High
Precip chance84%
Sunrise06:20
Sunset19:23
Saturday 5/9 Mostly cloudy
80°69°2.5 mm⌄
Wind9 mph E
Gusts20 mph
UV index7 – High
Precip chance80%
Sunrise06:22
Sunset19:21
Sunday 6/9 Mostly cloudy
77°68°17%⌄
Wind11 mph SE
Gusts22 mph
UV index6 – High
Precip chance17%
Sunrise06:23
Sunset19:20
Monday 7/9 Mostly cloudy
71°59°0.4 mm⌄
Wind18 mph S
Gusts39 mph
UV index6 – High
Precip chance46%
Sunrise06:24
Sunset19:18
Tuesday 8/9 Showers
71°57°0.6 mm⌄
Wind23 mph N
Gusts39 mph
UV index5 – Moderate
Precip chance55%
Sunrise06:25
Sunset19:16
Wednesday 9/9 Sunny
75°56°8%⌄
Wind13 mph N
Gusts28 mph
UV index6 – High
Precip chance8%
Sunrise06:26
Sunset19:14
Thursday 10/9 Sunny
78°57°0.6 mm⌄
Wind13 mph NW
Gusts23 mph
UV index6 – High
Precip chance41%
Sunrise06:27
Sunset19:12
Friday 11/9 Sunny
56°49°7%⌄
Wind18 mph NW
Gusts22 mph
UV index4 – Moderate
Precip chance7%
Sunrise06:28
Sunset19:11
Saturday 12/9 Mostly cloudy
68°47°9%⌄
Wind14 mph SW
Gusts32 mph
UV index4 – Moderate
Precip chance9%
Sunrise06:29
Sunset19:09
Sunday 13/9 Mostly cloudy
67°53°6%⌄
Wind14 mph SW
Gusts39 mph
UV index5 – Moderate
Precip chance6%
Sunrise06:30
Sunset19:07
Monday 14/9 Rain (climatological)
68°54°2.2 mm⌄
Day≈62–73°
Night≈49–59°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
71°56°20%⌄
Day≈65–76°
Night≈50–61°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
74°58°20%⌄
Day≈69–80°
Night≈53–63°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Rain (climatological)
71°56°5.3 mm⌄
Day≈66–77°
Night≈51–62°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
66°53°20%⌄
Day≈60–71°
Night≈47–58°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
61°50°20%⌄
Day≈56–67°
Night≈45–56°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Rain (climatological)
67°54°3.1 mm⌄
Day≈62–73°
Night≈48–59°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
69°55°20%⌄
Day≈64–75°
Night≈49–60°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
73°57°20%⌄
Day≈68–79°
Night≈52–63°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Rain (climatological)
70°56°2.8 mm⌄
Day≈65–76°
Night≈50–61°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
69°55°20%⌄
Day≈64–74°
Night≈49–60°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
66°53°20%⌄
Day≈61–72°
Night≈48–59°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Rain (climatological)
65°53°4.8 mm⌄
Day≈60–71°
Night≈47–58°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
64°52°20%⌄
Day≈59–70°
Night≈47–57°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
66°53°20%⌄
Day≈61–72°
Night≈48–58°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Rain (climatological)
73°57°3.9 mm⌄
Day≈67–78°
Night≈51–62°
Precip≈1.7 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 Merton, 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.