Saint-Laurent · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Saint-Laurent & 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
79°
Thu, Sep 3
Coldest night
48°
Wed, Sep 16
Days with precip
7 / 14
of 14 forecast days
Nicest day
Sun, Sep 6
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
72° 53°
64% precip chance
Sat 12 – Sun 13 Sep
66° 49°
23% precip chance
Sat 19 – Sun 20 Sep
73° 57°
typical range
Sat 26 – Sun 27 Sep
70° 55°
typical range
30 days — Saint-Laurent
14 forecast + 16 climatology
Thu · Today Sunny
79°65°142.9 mm⌄
Wind14 mph SE
Gusts24 mph
UV index6 – High
Precip chance83%
Sunrise06:18
Sunset19:29
Fri · Tomorrow Sunny
74°62°0.5 mm⌄
Wind11 mph NW
Gusts20 mph
UV index6 – Moderate
Precip chance36%
Sunrise06:19
Sunset19:27
Saturday 5/9 Showers
67°58°1.0 mm⌄
Wind13 mph NE
Gusts24 mph
UV index3 – Moderate
Precip chance64%
Sunrise06:21
Sunset19:25
Sunday 6/9 Sunny
72°53°6%⌄
Wind9 mph NE
Gusts23 mph
UV index5 – Moderate
Precip chance6%
Sunrise06:22
Sunset19:23
Monday 7/9 Sunny
76°56°2.2 mm⌄
Wind15 mph NW
Gusts25 mph
UV index6 – High
Precip chance57%
Sunrise06:23
Sunset19:21
Tuesday 8/9 Sunny
66°50°6%⌄
Wind10 mph N
Gusts19 mph
UV index5 – Moderate
Precip chance6%
Sunrise06:24
Sunset19:19
Wednesday 9/9 Mostly cloudy
59°54°5.8 mm⌄
Wind9 mph SE
Gusts18 mph
UV index4 – Moderate
Precip chance81%
Sunrise06:25
Sunset19:18
Thursday 10/9 Showers
67°57°3.5 mm⌄
Wind16 mph W
Gusts26 mph
UV index5 – Moderate
Precip chance79%
Sunrise06:27
Sunset19:16
Friday 11/9 Partly cloudy
61°51°0.1 mm⌄
Wind15 mph NW
Gusts25 mph
UV index4 – Moderate
Precip chance24%
Sunrise06:28
Sunset19:14
Saturday 12/9 Sunny
66°50°3%⌄
Wind11 mph N
Gusts24 mph
UV index5 – Moderate
Precip chance3%
Sunrise06:29
Sunset19:12
Sunday 13/9 Mostly cloudy
63°49°0.2 mm⌄
Wind6 mph N
Gusts15 mph
UV index4 – Moderate
Precip chance23%
Sunrise06:30
Sunset19:10
Monday 14/9 Mostly cloudy
68°54°0.6 mm⌄
Wind8 mph SE
Gusts16 mph
UV index5 – Moderate
Precip chance52%
Sunrise06:32
Sunset19:08
Tuesday 15/9 Showers
65°55°34.3 mm⌄
Wind14 mph SW
Gusts30 mph
UV index5 – Moderate
Precip chance93%
Sunrise06:33
Sunset19:06
Wednesday 16/9 Mostly cloudy
61°48°2.9 mm⌄
Wind14 mph W
Gusts26 mph
UV index3 – Moderate
Precip chance79%
Sunrise06:34
Sunset19:04
Thursday 17/9 Rain (climatological)
69°56°20.0 mm⌄
Day≈64–75°
Night≈50–61°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
74°58°20%⌄
Day≈68–79°
Night≈53–64°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
73°58°20%⌄
Day≈68–79°
Night≈53–63°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Rain (climatological)
72°57°33.0 mm⌄
Day≈67–78°
Night≈52–63°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
66°54°20%⌄
Day≈61–72°
Night≈48–59°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
66°53°20%⌄
Day≈60–71°
Night≈48–59°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Rain (climatological)
66°54°30.0 mm⌄
Day≈60–71°
Night≈48–59°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
68°55°20%⌄
Day≈63–74°
Night≈50–60°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
73°58°20%⌄
Day≈67–78°
Night≈52–63°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Rain (climatological)
70°56°19.0 mm⌄
Day≈65–76°
Night≈51–62°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
68°55°20%⌄
Day≈63–74°
Night≈49–60°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
67°54°20%⌄
Day≈61–72°
Night≈49–59°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Rain (climatological)
66°53°24.0 mm⌄
Day≈60–71°
Night≈48–59°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Partly cloudy (climatological)
65°53°20%⌄
Day≈60–71°
Night≈48–58°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 1/10 Partly cloudy (climatological)
50°39°20%⌄
Day≈45–55°
Night≈34–45°
Precip≈11.8 in / October
(climatological)Typical range for these dates · 1991–2020
Friday 2/10 Rain (climatological)
55°42°27.0 mm⌄
Day≈49–60°
Night≈37–47°
Precip≈11.8 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 Saint-Laurent, 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.