Grimes · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Grimes & 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
92°
Mon, Aug 31
Coldest night
56°
Sun, Aug 23
Days with precip
5 / 14
of 14 forecast days
Nicest day
Sun, Aug 23
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 29 – Sun 30 Aug
89° 66°
66% precip chance
Sat 5 – Sun 6 Sep
87° 58°
typical range
Sat 12 – Sun 13 Sep
76° 55°
typical range
Sat 19 – Sun 20 Sep
76° 55°
typical range
30 days — Grimes
14 forecast + 16 climatology
Sun · Today Mostly cloudy
81°56°10%⌄
Wind8 mph S
Gusts14 mph
UV index8 – High
Precip chance10%
Sunrise06:32
Sunset20:03
Mon · Tomorrow Sunny
79°61°10%⌄
Wind11 mph SE
Gusts24 mph
UV index8 – High
Precip chance10%
Sunrise06:33
Sunset20:02
Tuesday 25/8 Mostly cloudy
87°65°17%⌄
Wind10 mph S
Gusts21 mph
UV index8 – High
Precip chance17%
Sunrise06:34
Sunset20:00
Wednesday 26/8 Sunny
84°65°6.9 mm⌄
Wind12 mph NW
Gusts24 mph
UV index7 – High
Precip chance60%
Sunrise06:35
Sunset19:58
Thursday 27/8 Sunny
85°66°2%⌄
Wind9 mph N
Gusts17 mph
UV index7 – High
Precip chance2%
Sunrise06:36
Sunset19:57
Friday 28/8 Sunny
90°64°0.3 mm⌄
Wind16 mph E
Gusts28 mph
UV index7 – High
Precip chance17%
Sunrise06:37
Sunset19:55
Saturday 29/8 Mostly cloudy
89°66°3.0 mm⌄
Wind13 mph E
Gusts30 mph
UV index7 – High
Precip chance66%
Sunrise06:38
Sunset19:54
Sunday 30/8 Sunny
89°68°1.1 mm⌄
Wind10 mph N
Gusts19 mph
UV index8 – Very high
Precip chance57%
Sunrise06:39
Sunset19:52
Monday 31/8 Fog
92°68°9%⌄
Wind15 mph SE
Gusts33 mph
UV index8 – Very high
Precip chance9%
Sunrise06:40
Sunset19:50
Tuesday 1/9 Showers
89°69°3.7 mm⌄
Wind21 mph SE
Gusts43 mph
UV index7 – High
Precip chance72%
Sunrise06:41
Sunset19:49
Wednesday 2/9 Sunny
88°63°3%⌄
Wind15 mph NW
Gusts24 mph
UV index8 – Very high
Precip chance3%
Sunrise06:42
Sunset19:47
Thursday 3/9 Mostly cloudy
87°64°0.2 mm⌄
Wind17 mph SE
Gusts30 mph
UV index8 – Very high
Precip chance22%
Sunrise06:43
Sunset19:45
Friday 4/9 Sunny
83°61°1.4 mm⌄
Wind11 mph NE
Gusts31 mph
UV index7 – High
Precip chance57%
Sunrise06:44
Sunset19:44
Saturday 5/9 Mostly cloudy
87°63°11%⌄
Wind14 mph NE
Gusts28 mph
UV index8 – Very high
Precip chance11%
Sunrise06:45
Sunset19:42
Sunday 6/9 Rain (climatological)
80°58°3.7 mm⌄
Day≈75–86°
Night≈53–64°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 7/9 Partly cloudy (climatological)
81°59°20%⌄
Day≈76–87°
Night≈53–64°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Partly cloudy (climatological)
85°61°20%⌄
Day≈80–91°
Night≈56–67°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Rain (climatological)
83°60°4.6 mm⌄
Day≈78–89°
Night≈55–65°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Partly cloudy (climatological)
76°56°20%⌄
Day≈71–82°
Night≈50–61°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Partly cloudy (climatological)
72°53°20%⌄
Day≈67–77°
Night≈48–59°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Light rain (climatological)
74°55°1.9 mm⌄
Day≈69–79°
Night≈49–60°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
76°56°20%⌄
Day≈71–82°
Night≈50–61°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
80°58°20%⌄
Day≈75–86°
Night≈53–64°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Rain (climatological)
82°59°4.2 mm⌄
Day≈76–87°
Night≈54–64°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
79°58°20%⌄
Day≈74–85°
Night≈52–63°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
74°55°20%⌄
Day≈69–80°
Night≈49–60°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Rain (climatological)
73°53°2.6 mm⌄
Day≈67–78°
Night≈48–59°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
75°55°20%⌄
Day≈69–80°
Night≈49–60°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
76°56°20%⌄
Day≈71–82°
Night≈51–61°
Precip≈1.4 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Rain (climatological)
81°58°3.5 mm⌄
Day≈75–86°
Night≈53–64°
Precip≈1.4 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 Grimes, 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.