Downtown Cambridge · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Downtown Cambridge & 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°
Thu, Sep 17
Coldest night
47°
Fri, Sep 11
Days with precip
4 / 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
72° 56°
18% precip chance
Sat 12 – Sun 13 Sep
84° 51°
77% precip chance
Sat 19 – Sun 20 Sep
79° 60°
typical range
Sat 26 – Sun 27 Sep
79° 58°
typical range
30 days — Downtown Cambridge
14 forecast + 16 climatology
Fri · Today Showers
74°59°11.8 mm⌄
Wind8 mph NW
Gusts16 mph
UV index7 – High
Precip chance86%
Sunrise06:48
Sunset19:51
Sat · Tomorrow Sunny
72°58°8%⌄
Wind9 mph NE
Gusts23 mph
UV index7 – High
Precip chance8%
Sunrise06:49
Sunset19:50
Sunday 6/9 Sunny
68°56°0.1 mm⌄
Wind10 mph NE
Gusts21 mph
UV index7 – High
Precip chance18%
Sunrise06:50
Sunset19:48
Monday 7/9 Sunny
71°55°7%⌄
Wind7 mph E
Gusts17 mph
UV index6 – High
Precip chance7%
Sunrise06:52
Sunset19:46
Tuesday 8/9 Mostly cloudy
69°57°1.9 mm⌄
Wind9 mph E
Gusts18 mph
UV index5 – Moderate
Precip chance63%
Sunrise06:53
Sunset19:44
Wednesday 9/9 Showers
71°58°4.9 mm⌄
Wind10 mph S
Gusts15 mph
UV index5 – Moderate
Precip chance90%
Sunrise06:54
Sunset19:42
Thursday 10/9 Mostly cloudy
72°57°17%⌄
Wind20 mph NW
Gusts31 mph
UV index6 – High
Precip chance17%
Sunrise06:55
Sunset19:41
Friday 11/9 Mostly cloudy
62°47°11%⌄
Wind9 mph NE
Gusts21 mph
UV index4 – Moderate
Precip chance11%
Sunrise06:56
Sunset19:39
Saturday 12/9 Sunny
65°51°0.4 mm⌄
Wind14 mph E
Gusts25 mph
UV index4 – Moderate
Precip chance36%
Sunrise06:57
Sunset19:37
Sunday 13/9 Showers
84°57°5.1 mm⌄
Wind12 mph S
Gusts33 mph
UV index6 – High
Precip chance77%
Sunrise06:58
Sunset19:35
Monday 14/9 Sunny
77°57°17%⌄
Wind20 mph W
Gusts36 mph
UV index6 – High
Precip chance17%
Sunrise06:59
Sunset19:33
Tuesday 15/9 Sunny
72°56°4%⌄
Wind11 mph SE
Gusts13 mph
UV index6 – High
Precip chance4%
Sunrise07:00
Sunset19:32
Wednesday 16/9 Sunny
84°60°9%⌄
Wind11 mph S
Gusts14 mph
UV index7 – High
Precip chance9%
Sunrise07:01
Sunset19:30
Thursday 17/9 Sunny
90°72°0.3 mm⌄
Wind14 mph S
Gusts27 mph
UV index8 – Very high
Precip chance36%
Sunrise07:03
Sunset19:28
Friday 18/9 Rain (climatological)
75°58°5.0 mm⌄
Day≈70–80°
Night≈53–64°
Precip≈2.1 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
79°60°20%⌄
Day≈73–84°
Night≈55–66°
Precip≈2.1 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
77°60°20%⌄
Day≈72–83°
Night≈54–65°
Precip≈2.1 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Rain (climatological)
78°60°3.4 mm⌄
Day≈72–83°
Night≈54–65°
Precip≈2.1 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
74°58°20%⌄
Day≈69–80°
Night≈52–63°
Precip≈2.1 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
68°54°20%⌄
Day≈62–73°
Night≈48–59°
Precip≈2.1 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Rain (climatological)
69°55°6.5 mm⌄
Day≈64–74°
Night≈49–60°
Precip≈2.1 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
76°59°20%⌄
Day≈71–82°
Night≈53–64°
Precip≈2.1 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
75°58°20%⌄
Day≈70–80°
Night≈53–64°
Precip≈2.1 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Rain (climatological)
79°61°5.4 mm⌄
Day≈74–85°
Night≈55–66°
Precip≈2.1 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
73°57°20%⌄
Day≈68–78°
Night≈51–62°
Precip≈2.1 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Partly cloudy (climatological)
71°55°20%⌄
Day≈65–76°
Night≈50–61°
Precip≈2.1 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Rain (climatological)
67°53°6.8 mm⌄
Day≈61–72°
Night≈47–58°
Precip≈2.1 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 1/10 Partly cloudy (climatological)
54°41°20%⌄
Day≈49–60°
Night≈36–46°
Precip≈2.1 in / October
(climatological)Typical range for these dates · 1991–2020
Friday 2/10 Partly cloudy (climatological)
59°44°20%⌄
Day≈53–64°
Night≈38–49°
Precip≈2.1 in / October
(climatological)Typical range for these dates · 1991–2020
Saturday 3/10 Rain (climatological)
63°46°6.5 mm⌄
Day≈57–68°
Night≈40–51°
Precip≈2.1 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 Downtown Cambridge, 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.