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
85°
Sun, Aug 30
Coldest night
56°
Sat, Sep 12
Days with precip
5 / 14
of 14 forecast days
Nicest day
Thu, Sep 10
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
85° 64°
78% precip chance
Sat 12 – Sun 13 Sep
69° 55°
typical range
Sat 19 – Sun 20 Sep
67° 51°
typical range
Sat 26 – Sun 27 Sep
62° 50°
typical range
30 days — South Boston
14 forecast + 16 climatology
Sun · Today Mostly cloudy
85°59°1.6 mm⌄
Wind13 mph SW
Gusts26 mph
UV index7 – High
Precip chance57%
Sunrise06:07
Sunset19:22
Mon · Tomorrow Sunny
78°64°0.2 mm⌄
Wind11 mph E
Gusts23 mph
UV index7 – High
Precip chance18%
Sunrise06:08
Sunset19:20
Tuesday 1/9 Fog
66°62°30.4 mm⌄
Wind11 mph SE
Gusts23 mph
UV index1 – Low
Precip chance92%
Sunrise06:09
Sunset19:18
Wednesday 2/9 Mostly cloudy
68°62°0.3 mm⌄
Wind8 mph SE
Gusts18 mph
UV index6 – Moderate
Precip chance40%
Sunrise06:10
Sunset19:17
Thursday 3/9 Mostly cloudy
75°63°10.4 mm⌄
Wind12 mph SE
Gusts28 mph
UV index6 – High
Precip chance91%
Sunrise06:11
Sunset19:15
Friday 4/9 Partly cloudy
70°64°0.1 mm⌄
Wind8 mph N
Gusts20 mph
UV index6 – High
Precip chance25%
Sunrise06:12
Sunset19:13
Saturday 5/9 Showers
85°64°12.3 mm⌄
Wind14 mph S
Gusts31 mph
UV index7 – High
Precip chance78%
Sunrise06:13
Sunset19:12
Sunday 6/9 Mostly cloudy
81°65°14%⌄
Wind7 mph NW
Gusts19 mph
UV index6 – High
Precip chance14%
Sunrise06:14
Sunset19:10
Monday 7/9 Partly cloudy
73°63°0.2 mm⌄
Wind13 mph W
Gusts25 mph
UV index5 – Moderate
Precip chance26%
Sunrise06:15
Sunset19:08
Tuesday 8/9 Mostly cloudy
71°58°9%⌄
Wind13 mph W
Gusts24 mph
UV index5 – Moderate
Precip chance9%
Sunrise06:16
Sunset19:06
Wednesday 9/9 Sunny
69°58°2.1 mm⌄
Wind12 mph W
Gusts23 mph
UV index5 – Moderate
Precip chance57%
Sunrise06:18
Sunset19:05
Thursday 10/9 Mostly cloudy
69°56°9%⌄
Wind6 mph W
Gusts15 mph
UV index5 – Moderate
Precip chance9%
Sunrise06:19
Sunset19:03
Friday 11/9 Sunny
63°57°0.6 mm⌄
Wind12 mph NE
Gusts17 mph
UV index5 – Moderate
Precip chance37%
Sunrise06:20
Sunset19:01
Saturday 12/9 Sunny
69°56°4%⌄
Wind11 mph N
Gusts19 mph
UV index6 – High
Precip chance4%
Sunrise06:21
Sunset18:59
Sunday 13/9 Rain (climatological)
67°55°16.0 mm⌄
Day≈62–72°
Night≈49–60°
Precip≈5.0 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
67°55°20%⌄
Day≈62–72°
Night≈49–60°
Precip≈5.0 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
69°56°20%⌄
Day≈63–74°
Night≈51–61°
Precip≈5.0 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Rain (climatological)
67°55°13.9 mm⌄
Day≈62–73°
Night≈49–60°
Precip≈5.0 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
64°53°20%⌄
Day≈59–69°
Night≈48–58°
Precip≈5.0 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
63°52°20%⌄
Day≈58–68°
Night≈47–58°
Precip≈5.0 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Rain (climatological)
60°51°10.5 mm⌄
Day≈55–66°
Night≈46–56°
Precip≈5.0 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
67°55°20%⌄
Day≈62–73°
Night≈49–60°
Precip≈5.0 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
67°55°20%⌄
Day≈62–73°
Night≈50–60°
Precip≈5.0 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Rain (climatological)
67°55°10.1 mm⌄
Day≈61–72°
Night≈49–60°
Precip≈5.0 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
67°55°20%⌄
Day≈62–72°
Night≈49–60°
Precip≈5.0 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
61°51°20%⌄
Day≈56–66°
Night≈46–57°
Precip≈5.0 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Rain (climatological)
62°51°11.8 mm⌄
Day≈56–67°
Night≈46–57°
Precip≈5.0 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
60°50°20%⌄
Day≈54–65°
Night≈45–56°
Precip≈5.0 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
62°52°20%⌄
Day≈57–68°
Night≈47–58°
Precip≈5.0 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Rain (climatological)
70°56°12.2 mm⌄
Day≈64–75°
Night≈51–62°
Precip≈5.0 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 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.