Lancaster · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Lancaster & 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
79°
Mon, Aug 31
Coldest night
52°
Sat, Aug 29
Days with precip
7 / 14
of 14 forecast days
Nicest day
Sat, Aug 22
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 22 – Sun 23 Aug
71° 54°
81% precip chance
Sat 29 – Sun 30 Aug
71° 52°
23% precip chance
Sat 5 – Sun 6 Sep
65° 46°
typical range
Sat 12 – Sun 13 Sep
62° 47°
typical range
30 days — Lancaster
14 forecast + 16 climatology
Wed · Today Showers
76°58°4.2 mm⌄
Wind9 mph SW
Gusts17 mph
UV index7 – High
Precip chance87%
Sunrise06:30
Sunset20:25
Thu · Tomorrow Showers
72°57°7.4 mm⌄
Wind7 mph NW
Gusts16 mph
UV index3 – Low
Precip chance91%
Sunrise06:31
Sunset20:23
Friday 21/8 Sunny
73°56°1.8 mm⌄
Wind7 mph SW
Gusts15 mph
UV index7 – High
Precip chance57%
Sunrise06:33
Sunset20:22
Saturday 22/8 Sunny
71°54°7%⌄
Wind7 mph S
Gusts17 mph
UV index7 – High
Precip chance7%
Sunrise06:34
Sunset20:20
Sunday 23/8 Mostly cloudy
67°55°2.0 mm⌄
Wind17 mph E
Gusts35 mph
UV index4 – Moderate
Precip chance81%
Sunrise06:35
Sunset20:18
Monday 24/8 Showers
63°57°2.8 mm⌄
Wind17 mph E
Gusts33 mph
UV index5 – Moderate
Precip chance80%
Sunrise06:36
Sunset20:16
Tuesday 25/8 Sunny
70°54°15%⌄
Wind11 mph SW
Gusts25 mph
UV index6 – High
Precip chance15%
Sunrise06:37
Sunset20:15
Wednesday 26/8 Sunny
69°54°1.5 mm⌄
Wind8 mph SW
Gusts14 mph
UV index6 – High
Precip chance57%
Sunrise06:39
Sunset20:13
Thursday 27/8 Mostly cloudy
70°57°6.2 mm⌄
Wind6 mph E
Gusts13 mph
UV index5 – Moderate
Precip chance85%
Sunrise06:40
Sunset20:11
Friday 28/8 Mostly cloudy
69°56°19%⌄
Wind12 mph E
Gusts24 mph
UV index5 – Moderate
Precip chance19%
Sunrise06:41
Sunset20:09
Saturday 29/8 Mostly cloudy
69°52°15%⌄
Wind12 mph E
Gusts25 mph
UV index6 – High
Precip chance15%
Sunrise06:42
Sunset20:08
Sunday 30/8 Mostly cloudy
71°56°23%⌄
Wind16 mph E
Gusts29 mph
UV index5 – Moderate
Precip chance23%
Sunrise06:43
Sunset20:06
Monday 31/8 Sunny
79°62°13%⌄
Wind14 mph N
Gusts30 mph
UV index7 – High
Precip chance13%
Sunrise06:45
Sunset20:04
Tuesday 1/9 Sunny
78°63°17%⌄
Wind5 mph N
Gusts9 mph
UV index7 – High
Precip chance17%
Sunrise06:46
Sunset20:02
Wednesday 2/9 Rain (climatological)
60°47°4.7 mm⌄
Day≈55–65°
Night≈42–52°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 3/9 Partly cloudy (climatological)
64°49°20%⌄
Day≈58–69°
Night≈44–55°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 4/9 Partly cloudy (climatological)
66°50°20%⌄
Day≈60–71°
Night≈45–56°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 5/9 Rain (climatological)
65°50°6.7 mm⌄
Day≈60–71°
Night≈45–56°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 6/9 Partly cloudy (climatological)
58°46°20%⌄
Day≈53–64°
Night≈40–51°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 7/9 Partly cloudy (climatological)
56°44°20%⌄
Day≈50–61°
Night≈39–50°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Rain (climatological)
60°47°4.1 mm⌄
Day≈54–65°
Night≈41–52°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Partly cloudy (climatological)
64°49°20%⌄
Day≈59–69°
Night≈44–55°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Partly cloudy (climatological)
65°50°20%⌄
Day≈60–71°
Night≈45–56°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Rain (climatological)
66°51°6.3 mm⌄
Day≈60–71°
Night≈45–56°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Partly cloudy (climatological)
62°48°20%⌄
Day≈56–67°
Night≈43–53°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
60°47°20%⌄
Day≈55–65°
Night≈42–52°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Rain (climatological)
58°46°2.8 mm⌄
Day≈52–63°
Night≈40–51°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
60°47°20%⌄
Day≈55–65°
Night≈42–52°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
60°47°20%⌄
Day≈55–65°
Night≈42–52°
Precip≈2.2 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Rain (climatological)
64°49°7.3 mm⌄
Day≈58–69°
Night≈44–55°
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 Lancaster, 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.