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
74°
Thu, Sep 10
Coldest night
46°
Tue, Sep 1
Days with precip
6 / 14
of 14 forecast days
Nicest day
Tue, Sep 1
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 29 – Sun 30 Aug
72° 53°
77% precip chance
Sat 5 – Sun 6 Sep
66° 49°
81% precip chance
Sat 12 – Sun 13 Sep
61° 46°
typical range
Sat 19 – Sun 20 Sep
61° 47°
typical range
30 days — Lancaster
14 forecast + 16 climatology
Fri · Today Light rain
70°58°14.6 mm⌄
Wind12 mph SW
Gusts27 mph
UV index5 – Moderate
Precip chance95%
Sunrise06:41
Sunset20:09
Sat · Tomorrow Sunny
72°55°7.0 mm⌄
Wind10 mph NW
Gusts20 mph
UV index6 – High
Precip chance68%
Sunrise06:42
Sunset20:08
Sunday 30/8 Sunny
68°53°5.3 mm⌄
Wind14 mph SW
Gusts27 mph
UV index5 – Moderate
Precip chance77%
Sunrise06:43
Sunset20:06
Monday 31/8 Sunny
69°53°1.7 mm⌄
Wind9 mph N
Gusts22 mph
UV index6 – High
Precip chance57%
Sunrise06:45
Sunset20:04
Tuesday 1/9 Sunny
68°46°8%⌄
Wind7 mph SE
Gusts16 mph
UV index6 – High
Precip chance8%
Sunrise06:46
Sunset20:02
Wednesday 2/9 Sunny
65°49°8%⌄
Wind8 mph SE
Gusts19 mph
UV index5 – Moderate
Precip chance8%
Sunrise06:47
Sunset20:00
Thursday 3/9 Mostly cloudy
63°51°23%⌄
Wind6 mph SE
Gusts9 mph
UV index4 – Moderate
Precip chance23%
Sunrise06:48
Sunset19:58
Friday 4/9 Sunny
68°50°8%⌄
Wind12 mph E
Gusts19 mph
UV index5 – Moderate
Precip chance8%
Sunrise06:49
Sunset19:56
Saturday 5/9 Showers
66°49°2.3 mm⌄
Wind19 mph N
Gusts39 mph
UV index5 – Moderate
Precip chance76%
Sunrise06:51
Sunset19:55
Sunday 6/9 Showers
58°55°2.0 mm⌄
Wind18 mph N
Gusts35 mph
UV index3 – Moderate
Precip chance81%
Sunrise06:52
Sunset19:53
Monday 7/9 Mostly cloudy
61°56°31%⌄
Wind15 mph N
Gusts31 mph
UV index4 – Moderate
Precip chance31%
Sunrise06:53
Sunset19:51
Tuesday 8/9 Mostly cloudy
67°54°21%⌄
Wind9 mph SW
Gusts16 mph
UV index5 – Moderate
Precip chance21%
Sunrise06:54
Sunset19:49
Wednesday 9/9 Mostly cloudy
61°56°35%⌄
Wind13 mph SW
Gusts34 mph
UV index4 – Moderate
Precip chance35%
Sunrise06:55
Sunset19:47
Thursday 10/9 Fog
74°59°0.4 mm⌄
Wind6 mph SE
Gusts17 mph
UV index5 – Moderate
Precip chance56%
Sunrise06:57
Sunset19:45
Friday 11/9 Rain (climatological)
55°44°6.0 mm⌄
Day≈50–61°
Night≈38–49°
Precip≈2.8 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Partly cloudy (climatological)
59°46°20%⌄
Day≈54–64°
Night≈40–51°
Precip≈2.8 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
61°47°20%⌄
Day≈56–66°
Night≈42–53°
Precip≈2.8 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Rain (climatological)
61°47°8.6 mm⌄
Day≈55–66°
Night≈42–52°
Precip≈2.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
54°43°20%⌄
Day≈48–59°
Night≈37–48°
Precip≈2.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
51°41°20%⌄
Day≈46–56°
Night≈36–47°
Precip≈2.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Rain (climatological)
55°44°5.3 mm⌄
Day≈49–60°
Night≈38–49°
Precip≈2.8 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
59°46°20%⌄
Day≈54–65°
Night≈41–52°
Precip≈2.8 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
61°47°20%⌄
Day≈55–66°
Night≈42–52°
Precip≈2.8 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Rain (climatological)
61°47°8.2 mm⌄
Day≈56–67°
Night≈42–53°
Precip≈2.8 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
57°45°20%⌄
Day≈52–62°
Night≈39–50°
Precip≈2.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
55°44°20%⌄
Day≈50–61°
Night≈38–49°
Precip≈2.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Rain (climatological)
53°42°3.6 mm⌄
Day≈48–58°
Night≈37–48°
Precip≈2.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
55°44°20%⌄
Day≈50–61°
Night≈38–49°
Precip≈2.8 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
55°44°20%⌄
Day≈50–61°
Night≈38–49°
Precip≈2.8 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Rain (climatological)
59°46°9.4 mm⌄
Day≈54–65°
Night≈41–51°
Precip≈2.8 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 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.