Harvard · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Harvard & 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
86°
Wed, Aug 19
Coldest night
55°
Wed, Aug 26
Days with precip
5 / 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
77° 59°
67% precip chance
Sat 29 – Sun 30 Aug
74° 59°
17% precip chance
Sat 5 – Sun 6 Sep
72° 51°
typical range
Sat 12 – Sun 13 Sep
68° 51°
typical range
30 days — Harvard
14 forecast + 16 climatology
Wed · Today Showers
86°61°7.5 mm⌄
Wind8 mph W
Gusts16 mph
UV index7 – High
Precip chance81%
Sunrise06:05
Sunset19:50
Thu · Tomorrow Sunny
77°63°2.2 mm⌄
Wind11 mph W
Gusts17 mph
UV index7 – High
Precip chance63%
Sunrise06:06
Sunset19:48
Friday 21/8 Sunny
76°65°4.5 mm⌄
Wind13 mph SW
Gusts22 mph
UV index7 – High
Precip chance76%
Sunrise06:08
Sunset19:47
Saturday 22/8 Sunny
77°63°3.1 mm⌄
Wind13 mph N
Gusts23 mph
UV index7 – High
Precip chance67%
Sunrise06:09
Sunset19:45
Sunday 23/8 Mostly cloudy
74°59°21%⌄
Wind8 mph NW
Gusts21 mph
UV index6 – High
Precip chance21%
Sunrise06:10
Sunset19:44
Monday 24/8 Partly cloudy
75°60°18%⌄
Wind9 mph S
Gusts22 mph
UV index6 – High
Precip chance18%
Sunrise06:11
Sunset19:42
Tuesday 25/8 Sunny
77°64°9%⌄
Wind15 mph SW
Gusts28 mph
UV index7 – High
Precip chance9%
Sunrise06:12
Sunset19:40
Wednesday 26/8 Sunny
67°55°16%⌄
Wind16 mph N
Gusts28 mph
UV index5 – Moderate
Precip chance16%
Sunrise06:13
Sunset19:39
Thursday 27/8 Sunny
70°56°10%⌄
Wind19 mph NE
Gusts29 mph
UV index6 – High
Precip chance10%
Sunrise06:14
Sunset19:37
Friday 28/8 Sunny
72°60°6%⌄
Wind13 mph NE
Gusts23 mph
UV index6 – High
Precip chance6%
Sunrise06:15
Sunset19:35
Saturday 29/8 Sunny
73°59°17%⌄
Wind13 mph NE
Gusts21 mph
UV index6 – High
Precip chance17%
Sunrise06:16
Sunset19:34
Sunday 30/8 Fog
74°63°10%⌄
Wind13 mph NE
Gusts19 mph
UV index6 – High
Precip chance10%
Sunrise06:17
Sunset19:32
Monday 31/8 Fog
72°62°1.8 mm⌄
Wind11 mph NE
Gusts13 mph
UV index5 – Moderate
Precip chance69%
Sunrise06:18
Sunset19:30
Tuesday 1/9 Sunny
79°63°11%⌄
Wind7 mph S
Gusts16 mph
UV index7 – High
Precip chance11%
Sunrise06:19
Sunset19:29
Wednesday 2/9 Rain (climatological)
69°55°4.5 mm⌄
Day≈64–74°
Night≈49–60°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 3/9 Partly cloudy (climatological)
68°54°20%⌄
Day≈62–73°
Night≈49–60°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 4/9 Partly cloudy (climatological)
71°56°20%⌄
Day≈66–77°
Night≈51–62°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 5/9 Rain (climatological)
72°56°4.3 mm⌄
Day≈66–77°
Night≈51–62°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 6/9 Partly cloudy (climatological)
63°51°20%⌄
Day≈57–68°
Night≈46–56°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 7/9 Partly cloudy (climatological)
62°51°20%⌄
Day≈57–68°
Night≈45–56°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Rain (climatological)
65°53°4.1 mm⌄
Day≈60–71°
Night≈47–58°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 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
Thursday 10/9 Partly cloudy (climatological)
68°54°20%⌄
Day≈63–73°
Night≈49–60°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Rain (climatological)
69°55°2.7 mm⌄
Day≈64–75°
Night≈50–60°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Partly cloudy (climatological)
68°55°20%⌄
Day≈63–74°
Night≈49–60°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
62°51°20%⌄
Day≈57–68°
Night≈46–56°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Rain (climatological)
62°51°5.2 mm⌄
Day≈57–68°
Night≈45–56°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
62°51°20%⌄
Day≈57–68°
Night≈46–56°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 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
Thursday 17/9 Rain (climatological)
70°56°4.9 mm⌄
Day≈65–76°
Night≈50–61°
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 Harvard, 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.