Union City · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Union City & 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
109°
Thu, Sep 3
Coldest night
72°
Mon, Sep 7
Days with precip
3 / 14
of 14 forecast days
Nicest day
Fri, Aug 28
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 29 – Sun 30 Aug
108° 82°
6% precip chance
Sat 5 – Sun 6 Sep
106° 81°
7% precip chance
Sat 12 – Sun 13 Sep
96° 71°
typical range
Sat 19 – Sun 20 Sep
92° 71°
typical range
30 days — Union City
14 forecast + 16 climatology
Tue · Today Sunny
105°81°4%⌄
Wind20 mph NE
Gusts31 mph
UV index10 – Very high
Precip chance4%
Sunrise06:58
Sunset20:08
Wed · Tomorrow Showers
97°74°3.9 mm⌄
Wind22 mph N
Gusts36 mph
UV index9 – Very high
Precip chance63%
Sunrise06:59
Sunset20:07
Thursday 27/8 Mostly cloudy
98°77°0.5 mm⌄
Wind11 mph E
Gusts25 mph
UV index8 – Very high
Precip chance36%
Sunrise07:00
Sunset20:06
Friday 28/8 Sunny
102°79°2%⌄
Wind13 mph S
Gusts33 mph
UV index9 – Very high
Precip chance2%
Sunrise07:01
Sunset20:04
Saturday 29/8 Mostly cloudy
103°82°6%⌄
Wind17 mph SW
Gusts39 mph
UV index8 – Very high
Precip chance6%
Sunrise07:01
Sunset20:03
Sunday 30/8 Sunny
108°82°2%⌄
Wind17 mph SE
Gusts36 mph
UV index10 – Very high
Precip chance2%
Sunrise07:02
Sunset20:02
Monday 31/8 Sunny
104°80°0%⌄
Wind19 mph S
Gusts37 mph
UV index9 – Very high
Precip chance0%
Sunrise07:03
Sunset20:00
Tuesday 1/9 Sunny
101°85°1.1 mm⌄
Wind17 mph NW
Gusts27 mph
UV index9 – Very high
Precip chance57%
Sunrise07:04
Sunset19:59
Wednesday 2/9 Sunny
103°80°1%⌄
Wind13 mph S
Gusts30 mph
UV index9 – Very high
Precip chance1%
Sunrise07:04
Sunset19:57
Thursday 3/9 Sunny
109°86°1%⌄
Wind16 mph SW
Gusts31 mph
UV index10 – Very high
Precip chance1%
Sunrise07:05
Sunset19:56
Friday 4/9 Sunny
103°79°2%⌄
Wind16 mph NE
Gusts30 mph
UV index9 – Very high
Precip chance2%
Sunrise07:06
Sunset19:55
Saturday 5/9 Sunny
106°81°2%⌄
Wind20 mph S
Gusts38 mph
UV index10 – Very high
Precip chance2%
Sunrise07:07
Sunset19:53
Sunday 6/9 Mostly cloudy
103°84°7%⌄
Wind21 mph S
Gusts39 mph
UV index9 – Very high
Precip chance7%
Sunrise07:07
Sunset19:52
Monday 7/9 Showers
92°72°3.4 mm⌄
Wind20 mph S
Gusts41 mph
UV index7 – High
Precip chance58%
Sunrise07:08
Sunset19:50
Tuesday 8/9 Light rain (climatological)
100°77°1.4 mm⌄
Day≈94–105°
Night≈72–83°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Partly cloudy (climatological)
103°79°20%⌄
Day≈98–108°
Night≈74–85°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Partly cloudy (climatological)
104°80°20%⌄
Day≈99–109°
Night≈74–85°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Light rain (climatological)
99°77°1.0 mm⌄
Day≈94–105°
Night≈72–82°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Partly cloudy (climatological)
96°75°20%⌄
Day≈91–102°
Night≈70–81°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
90°71°20%⌄
Day≈85–95°
Night≈66–77°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Light rain (climatological)
96°75°2.0 mm⌄
Day≈90–101°
Night≈69–80°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
100°77°20%⌄
Day≈94–105°
Night≈72–83°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
99°76°20%⌄
Day≈93–104°
Night≈71–82°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Light rain (climatological)
99°77°1.7 mm⌄
Day≈93–104°
Night≈71–82°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
99°77°20%⌄
Day≈94–105°
Night≈71–82°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
92°73°20%⌄
Day≈87–98°
Night≈67–78°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Light rain (climatological)
90°71°1.1 mm⌄
Day≈85–95°
Night≈66–77°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
91°72°20%⌄
Day≈86–96°
Night≈67–77°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
97°75°20%⌄
Day≈91–102°
Night≈70–81°
Precip≈0.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Light rain (climatological)
100°77°1.9 mm⌄
Day≈94–105°
Night≈72–83°
Precip≈0.8 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 Union City, 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.