Marlborough · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Marlborough & 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
30°
Tue, Sep 1
Coldest night
3°
Sat, Sep 12
Days with precip
4 / 14
of 14 forecast days
Nicest day
Wed, Sep 9
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
26° 8°
4% precip chance
Sat 12 – Sun 13 Sep
17° 2°
typical range
Sat 19 – Sun 20 Sep
15° 2°
typical range
Sat 26 – Sun 27 Sep
16° 2°
typical range
30 days — Marlborough
14 forecast + 16 climatology
Sun · Today Mostly cloudy
19°9°10.9 mm⌄
Wind16 mph S
Gusts29 mph
UV index4 – Moderate
Precip chance82%
Sunrise06:46
Sunset20:26
Mon · Tomorrow Sunny
23°8°4%⌄
Wind14 mph NW
Gusts32 mph
UV index5 – Moderate
Precip chance4%
Sunrise06:48
Sunset20:24
Tuesday 1/9 Sunny
30°8°4%⌄
Wind17 mph SW
Gusts25 mph
UV index5 – Moderate
Precip chance4%
Sunrise06:49
Sunset20:22
Wednesday 2/9 Sunny
26°14°4%⌄
Wind20 mph SW
Gusts24 mph
UV index4 – Moderate
Precip chance4%
Sunrise06:51
Sunset20:20
Thursday 3/9 Mostly cloudy
19°10°4.7 mm⌄
Wind15 mph NW
Gusts22 mph
UV index5 – Moderate
Precip chance71%
Sunrise06:52
Sunset20:17
Friday 4/9 Showers
16°9°1.4 mm⌄
Wind18 mph N
Gusts27 mph
UV index4 – Moderate
Precip chance59%
Sunrise06:54
Sunset20:15
Saturday 5/9 Sunny
20°9°4%⌄
Wind13 mph SE
Gusts27 mph
UV index6 – High
Precip chance4%
Sunrise06:55
Sunset20:13
Sunday 6/9 Sunny
26°8°4%⌄
Wind16 mph NW
Gusts24 mph
UV index7 – High
Precip chance4%
Sunrise06:57
Sunset20:11
Monday 7/9 Sunny
25°9°4%⌄
Wind14 mph N
Gusts28 mph
UV index6 – High
Precip chance4%
Sunrise06:58
Sunset20:08
Tuesday 8/9 Showers
20°10°0.6 mm⌄
Wind9 mph E
Gusts18 mph
UV index5 – Moderate
Precip chance37%
Sunrise07:00
Sunset20:06
Wednesday 9/9 Sunny
22°8°5%⌄
Wind7 mph E
Gusts16 mph
UV index6 – High
Precip chance5%
Sunrise07:02
Sunset20:04
Thursday 10/9 Mostly cloudy
20°8°9%⌄
Wind11 mph N
Gusts24 mph
UV index5 – Moderate
Precip chance9%
Sunrise07:03
Sunset20:02
Friday 11/9 Mostly cloudy
10°4°2.1 mm⌄
Wind11 mph N
Gusts21 mph
UV index2 – Low
Precip chance76%
Sunrise07:05
Sunset19:59
Saturday 12/9 Mostly cloudy
17°3°0.5 mm⌄
Wind10 mph NW
Gusts22 mph
UV index5 – Moderate
Precip chance38%
Sunrise07:06
Sunset19:57
Sunday 13/9 Rain (climatological)
13°2°3.2 mm⌄
Day≈10–16°
Night≈-1–5°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
16°4°20%⌄
Day≈13–19°
Night≈1–7°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
16°4°20%⌄
Day≈13–19°
Night≈1–7°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Rain (climatological)
17°4°3.8 mm⌄
Day≈14–20°
Night≈1–7°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
13°2°20%⌄
Day≈10–16°
Night≈-2–5°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
11°1°20%⌄
Day≈8–14°
Night≈-2–4°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Rain (climatological)
14°2°5.0 mm⌄
Day≈11–17°
Night≈-1–5°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
15°3°20%⌄
Day≈12–18°
Night≈0–6°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
15°3°20%⌄
Day≈12–18°
Night≈0–6°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Rain (climatological)
17°4°2.5 mm⌄
Day≈14–20°
Night≈1–7°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
17°4°20%⌄
Day≈14–20°
Night≈1–7°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
13°2°20%⌄
Day≈10–16°
Night≈-1–5°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Rain (climatological)
12°1°4.1 mm⌄
Day≈9–15°
Night≈-2–4°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
13°2°20%⌄
Day≈10–16°
Night≈-1–5°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
16°3°20%⌄
Day≈13–19°
Night≈0–6°
Precip≈1.7 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Rain (climatological)
16°4°4.7 mm⌄
Day≈13–19°
Night≈1–7°
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 Marlborough, 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.