Marion · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Marion & 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
81°
Wed, Aug 26
Coldest night
57°
Wed, Aug 26
Days with precip
5 / 14
of 14 forecast days
Nicest day
Mon, Sep 7
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 29 – Sun 30 Aug
81° 62°
23% precip chance
Sat 5 – Sun 6 Sep
76° 61°
77% precip chance
Sat 12 – Sun 13 Sep
72° 57°
typical range
Sat 19 – Sun 20 Sep
73° 59°
typical range
30 days — Marion
14 forecast + 16 climatology
Wed · Today Mostly cloudy
81°57°12%⌄
Wind8 mph W
Gusts16 mph
UV index8 – Very high
Precip chance12%
Sunrise06:52
Sunset20:03
Thu · Tomorrow Mostly cloudy
80°65°1.3 mm⌄
Wind6 mph W
Gusts17 mph
UV index9 – Very high
Precip chance57%
Sunrise06:53
Sunset20:02
Friday 28/8 Mostly cloudy
74°62°5.4 mm⌄
Wind6 mph W
Gusts16 mph
UV index5 – Moderate
Precip chance85%
Sunrise06:53
Sunset20:00
Saturday 29/8 Mostly cloudy
78°62°23%⌄
Wind6 mph S
Gusts15 mph
UV index7 – High
Precip chance23%
Sunrise06:54
Sunset19:59
Sunday 30/8 Fog
81°62°13%⌄
Wind7 mph W
Gusts15 mph
UV index7 – High
Precip chance13%
Sunrise06:55
Sunset19:57
Monday 31/8 Mostly cloudy
80°70°10%⌄
Wind6 mph W
Gusts15 mph
UV index6 – High
Precip chance10%
Sunrise06:56
Sunset19:56
Tuesday 1/9 Sunny
80°72°4%⌄
Wind8 mph W
Gusts9 mph
UV index7 – High
Precip chance4%
Sunrise06:57
Sunset19:54
Wednesday 2/9 Sunny
81°73°4%⌄
Wind8 mph NW
Gusts10 mph
UV index7 – High
Precip chance4%
Sunrise06:57
Sunset19:53
Thursday 3/9 Sunny
80°73°6%⌄
Wind8 mph W
Gusts13 mph
UV index7 – High
Precip chance6%
Sunrise06:58
Sunset19:52
Friday 4/9 Showers
77°70°7.6 mm⌄
Wind8 mph W
Gusts15 mph
UV index6 – High
Precip chance80%
Sunrise06:59
Sunset19:50
Saturday 5/9 Fog
74°68°2.9 mm⌄
Wind9 mph W
Gusts16 mph
UV index6 – High
Precip chance77%
Sunrise07:00
Sunset19:49
Sunday 6/9 Sunny
76°61°0.7 mm⌄
Wind7 mph NW
Gusts12 mph
UV index6 – High
Precip chance45%
Sunrise07:01
Sunset19:47
Monday 7/9 Sunny
77°61°10%⌄
Wind8 mph NW
Gusts14 mph
UV index7 – High
Precip chance10%
Sunrise07:01
Sunset19:46
Tuesday 8/9 Showers
75°60°7.4 mm⌄
Wind7 mph SE
Gusts13 mph
UV index5 – Moderate
Precip chance88%
Sunrise07:02
Sunset19:44
Wednesday 9/9 Rain (climatological)
73°60°4.4 mm⌄
Day≈67–78°
Night≈55–66°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Partly cloudy (climatological)
74°62°20%⌄
Day≈69–80°
Night≈56–67°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Partly cloudy (climatological)
74°61°20%⌄
Day≈69–80°
Night≈56–67°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Rain (climatological)
72°60°3.7 mm⌄
Day≈66–77°
Night≈55–65°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
68°57°20%⌄
Day≈62–73°
Night≈52–63°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
69°58°20%⌄
Day≈64–75°
Night≈53–64°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Rain (climatological)
71°59°5.0 mm⌄
Day≈65–76°
Night≈54–65°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
70°59°20%⌄
Day≈65–76°
Night≈54–64°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
74°61°20%⌄
Day≈68–79°
Night≈56–66°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Rain (climatological)
76°62°5.1 mm⌄
Day≈70–81°
Night≈57–68°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
73°60°20%⌄
Day≈67–78°
Night≈55–66°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
71°59°20%⌄
Day≈65–76°
Night≈54–65°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Rain (climatological)
69°58°6.8 mm⌄
Day≈64–74°
Night≈53–64°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
67°57°20%⌄
Day≈61–72°
Night≈51–62°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
70°59°20%⌄
Day≈65–75°
Night≈53–64°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Rain (climatological)
74°61°7.3 mm⌄
Day≈69–80°
Night≈56–67°
Precip≈2.2 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 Marion, 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.