Porters Lake · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Porters Lake & 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
71°
Mon, Sep 7
Coldest night
42°
Mon, Sep 14
Days with precip
9 / 14
of 14 forecast days
Nicest day
Mon, Sep 14
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
67° 54°
89% precip chance
Sat 12 – Sun 13 Sep
61° 44°
87% precip chance
Sat 19 – Sun 20 Sep
71° 55°
typical range
Sat 26 – Sun 27 Sep
70° 54°
typical range
30 days — Porters Lake
14 forecast + 16 climatology
Thu · Today Mostly cloudy
68°59°5.7 mm⌄
Wind11 mph SE
Gusts19 mph
UV index5 – Moderate
Precip chance83%
Sunrise06:37
Sunset19:46
Fri · Tomorrow Showers
64°58°31.4 mm⌄
Wind11 mph SE
Gusts27 mph
UV index1 – Low
Precip chance95%
Sunrise06:39
Sunset19:44
Saturday 5/9 Fog
67°54°5.7 mm⌄
Wind20 mph N
Gusts40 mph
UV index2 – Low
Precip chance89%
Sunrise06:40
Sunset19:43
Sunday 6/9 Showers
61°54°1.8 mm⌄
Wind16 mph N
Gusts32 mph
UV index4 – Moderate
Precip chance77%
Sunrise06:41
Sunset19:41
Monday 7/9 Sunny
71°53°10%⌄
Wind12 mph N
Gusts27 mph
UV index6 – High
Precip chance10%
Sunrise06:42
Sunset19:39
Tuesday 8/9 Showers
60°51°1.1 mm⌄
Wind8 mph NW
Gusts24 mph
UV index4 – Moderate
Precip chance63%
Sunrise06:43
Sunset19:37
Wednesday 9/9 Partly cloudy
66°51°0.1 mm⌄
Wind11 mph N
Gusts26 mph
UV index5 – Moderate
Precip chance28%
Sunrise06:44
Sunset19:35
Thursday 10/9 Showers
64°50°8.4 mm⌄
Wind12 mph S
Gusts28 mph
UV index4 – Moderate
Precip chance92%
Sunrise06:46
Sunset19:33
Friday 11/9 Showers
60°53°0.3 mm⌄
Wind12 mph W
Gusts27 mph
UV index4 – Moderate
Precip chance51%
Sunrise06:47
Sunset19:31
Saturday 12/9 Showers
61°52°4.9 mm⌄
Wind19 mph N
Gusts36 mph
UV index4 – Moderate
Precip chance87%
Sunrise06:48
Sunset19:30
Sunday 13/9 Showers
60°44°0.8 mm⌄
Wind17 mph N
Gusts35 mph
UV index5 – Moderate
Precip chance48%
Sunrise06:49
Sunset19:28
Monday 14/9 Sunny
65°42°10%⌄
Wind6 mph N
Gusts15 mph
UV index5 – Moderate
Precip chance10%
Sunrise06:50
Sunset19:26
Tuesday 15/9 Fog
68°63°0.9 mm⌄
Wind15 mph SW
Gusts38 mph
UV index4 – Moderate
Precip chance79%
Sunrise06:51
Sunset19:24
Wednesday 16/9 Showers
69°61°14.4 mm⌄
Wind17 mph SW
Gusts41 mph
UV index5 – Moderate
Precip chance94%
Sunrise06:53
Sunset19:22
Thursday 17/9 Rain (climatological)
63°52°15.9 mm⌄
Day≈58–68°
Night≈47–58°
Precip≈6.5 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
71°57°20%⌄
Day≈65–76°
Night≈51–62°
Precip≈6.5 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
71°57°20%⌄
Day≈65–76°
Night≈51–62°
Precip≈6.5 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Rain (climatological)
69°55°12.0 mm⌄
Day≈63–74°
Night≈50–61°
Precip≈6.5 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
65°53°20%⌄
Day≈60–71°
Night≈48–59°
Precip≈6.5 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
58°49°20%⌄
Day≈53–64°
Night≈44–55°
Precip≈6.5 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Rain (climatological)
64°53°14.2 mm⌄
Day≈58–69°
Night≈47–58°
Precip≈6.5 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
64°53°20%⌄
Day≈58–69°
Night≈47–58°
Precip≈6.5 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
68°55°20%⌄
Day≈63–74°
Night≈50–61°
Precip≈6.5 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Rain (climatological)
70°56°8.2 mm⌄
Day≈64–75°
Night≈51–62°
Precip≈6.5 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
67°54°20%⌄
Day≈61–72°
Night≈49–60°
Precip≈6.5 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
64°53°20%⌄
Day≈59–69°
Night≈47–58°
Precip≈6.5 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Rain (climatological)
62°51°19.7 mm⌄
Day≈56–67°
Night≈46–57°
Precip≈6.5 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Partly cloudy (climatological)
59°50°20%⌄
Day≈54–65°
Night≈45–55°
Precip≈6.5 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 1/10 Partly cloudy (climatological)
52°41°20%⌄
Day≈46–57°
Night≈35–46°
Precip≈6.5 in / October
(climatological)Typical range for these dates · 1991–2020
Friday 2/10 Rain (climatological)
52°41°13.7 mm⌄
Day≈46–57°
Night≈35–46°
Precip≈6.5 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 Porters Lake, 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.