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
57°
Fri, Aug 28
Days with precip
7 / 14
of 14 forecast days
Nicest day
Sat, Aug 29
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 22 – Sun 23 Aug
80° 61°
35% precip chance
Sat 29 – Sun 30 Aug
80° 59°
30% precip chance
Sat 5 – Sun 6 Sep
65° 52°
typical range
Sat 12 – Sun 13 Sep
65° 51°
typical range
30 days — Harvard
14 forecast + 16 climatology
Mon · Today Drizzle
77°65°3.3 mm⌄
Wind10 mph S
Gusts25 mph
UV index2 – Low
Precip chance77%
Sunrise05:55
Sunset19:45
Tue · Tomorrow Showers
79°63°2.2 mm⌄
Wind5 mph E
Gusts15 mph
UV index6 – Moderate
Precip chance76%
Sunrise05:56
Sunset19:43
Wednesday 19/8 Mostly cloudy
86°63°14%⌄
Wind10 mph W
Gusts16 mph
UV index8 – High
Precip chance14%
Sunrise05:57
Sunset19:42
Thursday 20/8 Showers
74°63°7.8 mm⌄
Wind6 mph E
Gusts12 mph
UV index7 – High
Precip chance84%
Sunrise05:58
Sunset19:40
Friday 21/8 Fog
71°61°2.6 mm⌄
Wind5 mph NE
Gusts11 mph
UV index1 – Low
Precip chance86%
Sunrise05:59
Sunset19:39
Saturday 22/8 Mostly cloudy
80°61°21%⌄
Wind5 mph SE
Gusts15 mph
UV index7 – High
Precip chance21%
Sunrise06:00
Sunset19:37
Sunday 23/8 Mostly cloudy
74°62°35%⌄
Wind9 mph S
Gusts16 mph
UV index5 – Moderate
Precip chance35%
Sunrise06:01
Sunset19:36
Monday 24/8 Mostly cloudy
82°64°12%⌄
Wind9 mph NW
Gusts18 mph
UV index7 – High
Precip chance12%
Sunrise06:03
Sunset19:34
Tuesday 25/8 Mostly cloudy
78°59°12%⌄
Wind6 mph SE
Gusts16 mph
UV index7 – High
Precip chance12%
Sunrise06:04
Sunset19:32
Wednesday 26/8 Mostly cloudy
63°60°2.4 mm⌄
Wind10 mph NE
Gusts21 mph
UV index4 – Moderate
Precip chance79%
Sunrise06:05
Sunset19:31
Thursday 27/8 Showers
62°58°23.5 mm⌄
Wind11 mph NE
Gusts26 mph
UV index4 – Moderate
Precip chance90%
Sunrise06:06
Sunset19:29
Friday 28/8 Showers
65°57°1.3 mm⌄
Wind9 mph N
Gusts23 mph
UV index4 – Moderate
Precip chance76%
Sunrise06:07
Sunset19:27
Saturday 29/8 Partly cloudy
70°59°30%⌄
Wind5 mph N
Gusts9 mph
UV index5 – Moderate
Precip chance30%
Sunrise06:08
Sunset19:26
Sunday 30/8 Sunny
80°59°7%⌄
Wind6 mph S
Gusts18 mph
UV index7 – High
Precip chance7%
Sunrise06:09
Sunset19:24
Monday 31/8 Rain (climatological)
73°60°11.0 mm⌄
Day≈67–78°
Night≈54–65°
Precip≈3.7 in / August
(climatological)Typical range for these dates · 1991–2020
Tuesday 1/9 Partly cloudy (climatological)
68°55°20%⌄
Day≈63–74°
Night≈49–60°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 2/9 Partly cloudy (climatological)
68°55°20%⌄
Day≈63–74°
Night≈49–60°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 3/9 Rain (climatological)
69°56°10.3 mm⌄
Day≈64–75°
Night≈50–61°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 4/9 Partly cloudy (climatological)
65°53°20%⌄
Day≈60–71°
Night≈48–58°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 5/9 Partly cloudy (climatological)
65°53°20%⌄
Day≈59–70°
Night≈47–58°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 6/9 Rain (climatological)
63°52°11.3 mm⌄
Day≈58–69°
Night≈47–57°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 7/9 Partly cloudy (climatological)
65°53°20%⌄
Day≈59–70°
Night≈47–58°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Partly cloudy (climatological)
71°56°20%⌄
Day≈65–76°
Night≈51–62°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Rain (climatological)
69°55°6.3 mm⌄
Day≈63–74°
Night≈50–60°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Partly cloudy (climatological)
67°54°20%⌄
Day≈61–72°
Night≈49–59°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Partly cloudy (climatological)
64°53°20%⌄
Day≈59–70°
Night≈47–58°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Rain (climatological)
61°51°9.4 mm⌄
Day≈56–67°
Night≈45–56°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
65°53°20%⌄
Day≈60–70°
Night≈47–58°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
69°55°20%⌄
Day≈63–74°
Night≈50–61°
Precip≈3.7 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Rain (climatological)
69°55°8.8 mm⌄
Day≈64–74°
Night≈50–61°
Precip≈3.7 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.