Westmount · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Westmount & 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
26°
Thu, Aug 27
Coldest night
12°
Tue, Sep 1
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 29 – Sun 30 Aug
22° 12°
8% precip chance
Sat 5 – Sun 6 Sep
21° 13°
60% precip chance
Sat 12 – Sun 13 Sep
16° 8°
typical range
Sat 19 – Sun 20 Sep
15° 7°
typical range
30 days — Westmount
14 forecast + 16 climatology
Mon · Today Sunny
21°14°19.9 mm⌄
Wind11 mph SW
Gusts17 mph
UV index5 – Moderate
Precip chance79%
Sunrise06:06
Sunset19:47
Tue · Tomorrow Showers
21°15°15.9 mm⌄
Wind10 mph W
Gusts19 mph
UV index5 – Moderate
Precip chance87%
Sunrise06:07
Sunset19:45
Wednesday 26/8 Sunny
23°14°0.1 mm⌄
Wind12 mph W
Gusts21 mph
UV index6 – High
Precip chance17%
Sunrise06:08
Sunset19:43
Thursday 27/8 Sunny
26°15°2.9 mm⌄
Wind11 mph SE
Gusts18 mph
UV index7 – High
Precip chance60%
Sunrise06:09
Sunset19:41
Friday 28/8 Sunny
24°17°5.0 mm⌄
Wind12 mph S
Gusts22 mph
UV index6 – High
Precip chance69%
Sunrise06:11
Sunset19:40
Saturday 29/8 Mostly cloudy
22°14°8%⌄
Wind6 mph E
Gusts14 mph
UV index6 – High
Precip chance8%
Sunrise06:12
Sunset19:38
Sunday 30/8 Sunny
21°12°8%⌄
Wind9 mph SW
Gusts20 mph
UV index6 – High
Precip chance8%
Sunrise06:13
Sunset19:36
Monday 31/8 Showers
23°15°1.8 mm⌄
Wind6 mph W
Gusts15 mph
UV index6 – High
Precip chance64%
Sunrise06:14
Sunset19:34
Tuesday 1/9 Sunny
20°12°6%⌄
Wind7 mph N
Gusts19 mph
UV index5 – Moderate
Precip chance6%
Sunrise06:15
Sunset19:32
Wednesday 2/9 Mostly cloudy
18°12°14%⌄
Wind6 mph NE
Gusts14 mph
UV index4 – Moderate
Precip chance14%
Sunrise06:17
Sunset19:30
Thursday 3/9 Mostly cloudy
23°15°10%⌄
Wind8 mph NE
Gusts15 mph
UV index6 – High
Precip chance10%
Sunrise06:18
Sunset19:29
Friday 4/9 Showers
21°14°1.1 mm⌄
Wind6 mph NE
Gusts17 mph
UV index6 – High
Precip chance61%
Sunrise06:19
Sunset19:27
Saturday 5/9 Mostly cloudy
21°13°18%⌄
Wind7 mph NE
Gusts19 mph
UV index5 – Moderate
Precip chance18%
Sunrise06:20
Sunset19:25
Sunday 6/9 Sunny
21°13°1.8 mm⌄
Wind11 mph SE
Gusts28 mph
UV index5 – Moderate
Precip chance60%
Sunrise06:22
Sunset19:23
Monday 7/9 Rain (climatological)
17°10°9.8 mm⌄
Day≈14–20°
Night≈7–13°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Partly cloudy (climatological)
19°10°20%⌄
Day≈16–22°
Night≈7–13°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Partly cloudy (climatological)
18°10°20%⌄
Day≈15–21°
Night≈7–13°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Rain (climatological)
17°9°10.9 mm⌄
Day≈14–20°
Night≈6–12°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Partly cloudy (climatological)
16°9°20%⌄
Day≈13–19°
Night≈6–12°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Partly cloudy (climatological)
16°9°20%⌄
Day≈13–19°
Night≈6–12°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Rain (climatological)
15°8°12.6 mm⌄
Day≈12–18°
Night≈5–11°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
17°10°20%⌄
Day≈14–20°
Night≈7–13°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
19°11°20%⌄
Day≈16–22°
Night≈8–14°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Rain (climatological)
20°11°11.5 mm⌄
Day≈17–23°
Night≈8–14°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
17°10°20%⌄
Day≈14–20°
Night≈7–13°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
17°10°20%⌄
Day≈14–20°
Night≈7–13°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Rain (climatological)
15°8°13.0 mm⌄
Day≈12–18°
Night≈5–11°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
13°7°20%⌄
Day≈10–16°
Night≈4–10°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
18°10°20%⌄
Day≈15–21°
Night≈7–13°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Rain (climatological)
17°10°8.0 mm⌄
Day≈14–20°
Night≈7–13°
Precip≈4.1 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 Westmount, 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.