Mount Joy · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Mount Joy & 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
84°
Thu, Aug 20
Coldest night
55°
Fri, Aug 28
Days with precip
8 / 14
of 14 forecast days
Nicest day
Sun, Aug 30
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 22 – Sun 23 Aug
80° 64°
86% precip chance
Sat 29 – Sun 30 Aug
78° 59°
7% precip chance
Sat 5 – Sun 6 Sep
75° 57°
typical range
Sat 12 – Sun 13 Sep
73° 56°
typical range
30 days — Mount Joy
14 forecast + 16 climatology
Thu · Today Sunny
84°64°6.1 mm⌄
Wind12 mph NE
Gusts21 mph
UV index5 – Moderate
Precip chance75%
Sunrise06:22
Sunset19:56
Fri · Tomorrow Mostly cloudy
76°63°11%⌄
Wind6 mph N
Gusts16 mph
UV index8 – Very high
Precip chance11%
Sunrise06:23
Sunset19:54
Saturday 22/8 Fog
73°64°5.9 mm⌄
Wind11 mph E
Gusts17 mph
UV index2 – Low
Precip chance86%
Sunrise06:24
Sunset19:53
Sunday 23/8 Sunny
80°66°1.5 mm⌄
Wind14 mph W
Gusts23 mph
UV index8 – High
Precip chance60%
Sunrise06:25
Sunset19:52
Monday 24/8 Sunny
76°60°5%⌄
Wind13 mph W
Gusts20 mph
UV index6 – High
Precip chance5%
Sunrise06:26
Sunset19:50
Tuesday 25/8 Partly cloudy
80°61°12.2 mm⌄
Wind9 mph SE
Gusts20 mph
UV index7 – High
Precip chance79%
Sunrise06:27
Sunset19:49
Wednesday 26/8 Showers
74°66°12.6 mm⌄
Wind11 mph S
Gusts22 mph
UV index5 – Moderate
Precip chance92%
Sunrise06:28
Sunset19:47
Thursday 27/8 Showers
71°58°5.8 mm⌄
Wind13 mph W
Gusts24 mph
UV index6 – High
Precip chance75%
Sunrise06:29
Sunset19:46
Friday 28/8 Sunny
70°55°14%⌄
Wind14 mph W
Gusts21 mph
UV index6 – High
Precip chance14%
Sunrise06:30
Sunset19:44
Saturday 29/8 Sunny
76°59°7%⌄
Wind10 mph NW
Gusts15 mph
UV index6 – High
Precip chance7%
Sunrise06:30
Sunset19:42
Sunday 30/8 Sunny
78°59°5%⌄
Wind3 mph NE
Gusts10 mph
UV index7 – High
Precip chance5%
Sunrise06:31
Sunset19:41
Monday 31/8 Mostly cloudy
80°62°5.5 mm⌄
Wind15 mph S
Gusts29 mph
UV index6 – High
Precip chance80%
Sunrise06:32
Sunset19:39
Tuesday 1/9 Showers
78°67°3.2 mm⌄
Wind12 mph NW
Gusts17 mph
UV index6 – High
Precip chance75%
Sunrise06:33
Sunset19:38
Wednesday 2/9 Mostly cloudy
79°64°15%⌄
Wind10 mph E
Gusts24 mph
UV index7 – High
Precip chance15%
Sunrise06:34
Sunset19:36
Thursday 3/9 Rain (climatological)
67°54°6.9 mm⌄
Day≈61–72°
Night≈49–60°
Precip≈4.5 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 4/9 Partly cloudy (climatological)
76°60°20%⌄
Day≈70–81°
Night≈54–65°
Precip≈4.5 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 5/9 Partly cloudy (climatological)
75°59°20%⌄
Day≈69–80°
Night≈54–64°
Precip≈4.5 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 6/9 Rain (climatological)
72°57°10.4 mm⌄
Day≈66–77°
Night≈52–63°
Precip≈4.5 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 7/9 Partly cloudy (climatological)
70°56°20%⌄
Day≈64–75°
Night≈51–61°
Precip≈4.5 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Partly cloudy (climatological)
68°55°20%⌄
Day≈62–73°
Night≈49–60°
Precip≈4.5 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Rain (climatological)
64°53°15.3 mm⌄
Day≈59–70°
Night≈47–58°
Precip≈4.5 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Partly cloudy (climatological)
67°54°20%⌄
Day≈62–72°
Night≈49–60°
Precip≈4.5 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Partly cloudy (climatological)
73°58°20%⌄
Day≈68–79°
Night≈53–64°
Precip≈4.5 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Rain (climatological)
73°58°11.1 mm⌄
Day≈68–78°
Night≈53–63°
Precip≈4.5 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
71°56°20%⌄
Day≈65–76°
Night≈51–62°
Precip≈4.5 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
67°55°20%⌄
Day≈62–73°
Night≈49–60°
Precip≈4.5 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Rain (climatological)
63°52°8.1 mm⌄
Day≈58–68°
Night≈46–57°
Precip≈4.5 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
65°53°20%⌄
Day≈59–70°
Night≈48–58°
Precip≈4.5 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
71°56°20%⌄
Day≈65–76°
Night≈51–62°
Precip≈4.5 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Rain (climatological)
72°57°13.4 mm⌄
Day≈66–77°
Night≈52–63°
Precip≈4.5 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 Mount Joy, 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.