South Boston · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
South Boston & 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
105°
Wed, Sep 2
Coldest night
61°
Wed, Sep 9
Days with precip
5 / 14
of 14 forecast days
Nicest day
Mon, Sep 7
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
99° 62°
72% precip chance
Sat 12 – Sun 13 Sep
93° 66°
66% precip chance
Sat 19 – Sun 20 Sep
94° 67°
typical range
Sat 26 – Sun 27 Sep
93° 66°
typical range
30 days — South Boston
14 forecast + 16 climatology
Wed · Today Sunny
105°70°17%⌄
Wind6 mph W
Gusts15 mph
UV index9 – Very high
Precip chance17%
Sunrise06:47
Sunset19:42
Thu · Tomorrow Sunny
103°76°0.3 mm⌄
Wind10 mph W
Gusts22 mph
UV index9 – Very high
Precip chance36%
Sunrise06:48
Sunset19:41
Friday 4/9 Sunny
101°74°0.7 mm⌄
Wind8 mph W
Gusts18 mph
UV index9 – Very high
Precip chance36%
Sunrise06:49
Sunset19:40
Saturday 5/9 Mostly cloudy
99°71°5.3 mm⌄
Wind9 mph SE
Gusts21 mph
UV index8 – High
Precip chance72%
Sunrise06:50
Sunset19:38
Sunday 6/9 Mostly cloudy
87°62°0.3 mm⌄
Wind8 mph NE
Gusts22 mph
UV index7 – High
Precip chance36%
Sunrise06:50
Sunset19:37
Monday 7/9 Mostly cloudy
85°68°14%⌄
Wind6 mph E
Gusts11 mph
UV index6 – High
Precip chance14%
Sunrise06:51
Sunset19:35
Tuesday 8/9 Mostly cloudy
85°70°12.0 mm⌄
Wind13 mph NW
Gusts25 mph
UV index7 – High
Precip chance85%
Sunrise06:52
Sunset19:34
Wednesday 9/9 Showers
73°61°12.6 mm⌄
Wind9 mph NE
Gusts25 mph
UV index5 – Moderate
Precip chance90%
Sunrise06:53
Sunset19:32
Thursday 10/9 Mostly cloudy
87°62°14%⌄
Wind8 mph S
Gusts24 mph
UV index8 – Very high
Precip chance14%
Sunrise06:54
Sunset19:31
Friday 11/9 Sunny
100°74°7%⌄
Wind9 mph SW
Gusts28 mph
UV index9 – Very high
Precip chance7%
Sunrise06:54
Sunset19:29
Saturday 12/9 Sunny
93°72°5.5 mm⌄
Wind7 mph NE
Gusts17 mph
UV index8 – Very high
Precip chance66%
Sunrise06:55
Sunset19:28
Sunday 13/9 Fog
86°66°0.1 mm⌄
Wind5 mph SW
Gusts12 mph
UV index8 – Very high
Precip chance20%
Sunrise06:56
Sunset19:26
Monday 14/9 Sunny
98°71°4%⌄
Wind8 mph SW
Gusts21 mph
UV index9 – Very high
Precip chance4%
Sunrise06:57
Sunset19:25
Tuesday 15/9 Sunny
89°71°1.8 mm⌄
Wind11 mph NE
Gusts20 mph
UV index8 – Very high
Precip chance57%
Sunrise06:57
Sunset19:23
Wednesday 16/9 Rain (climatological)
92°69°7.0 mm⌄
Day≈87–98°
Night≈64–74°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
98°73°20%⌄
Day≈93–104°
Night≈67–78°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
97°72°20%⌄
Day≈91–102°
Night≈67–77°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Rain (climatological)
94°70°7.3 mm⌄
Day≈88–99°
Night≈65–75°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
88°67°20%⌄
Day≈83–93°
Night≈61–72°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
90°68°20%⌄
Day≈85–96°
Night≈63–73°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Rain (climatological)
90°68°5.6 mm⌄
Day≈85–95°
Night≈62–73°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
93°70°20%⌄
Day≈88–98°
Night≈64–75°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
98°73°20%⌄
Day≈93–104°
Night≈67–78°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Rain (climatological)
98°73°10.4 mm⌄
Day≈92–103°
Night≈67–78°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
93°70°20%⌄
Day≈88–99°
Night≈65–75°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
88°66°20%⌄
Day≈82–93°
Night≈61–72°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Rain (climatological)
90°68°8.7 mm⌄
Day≈85–96°
Night≈63–73°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Partly cloudy (climatological)
86°66°20%⌄
Day≈81–92°
Night≈60–71°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Partly cloudy (climatological)
91°69°20%⌄
Day≈86–97°
Night≈63–74°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 1/10 Rain (climatological)
87°63°9.8 mm⌄
Day≈82–93°
Night≈58–69°
Precip≈3.3 in / October
(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 South Boston, 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.