Lancaster, Pennsylvania

Last updated: 11:36 PM CDT  ·  Refresh
12°C
Feels like 11°
Clear
▲ 24°  /  ▼ 14°
Wind
3 mph SSE
Humidity
90%
Dew Point
11°
Pressure
29.79 inHg
Visibility
8 mi
UV Index
0.0
Cloud Cover
7%
Sunrise
6:37 AM
Sunset
4:59 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Lancaster is currently clear at 12°C. Dry conditions are expected through the next 24 hours. Sunrise: 6:37AM · Sunset: 4:59PM.

Alerts

No active alerts for this location.
72 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
12°
1%
1 AM
11°
1%
2 AM
11°
1%
3 AM
10°
1%
4 AM
9°
1%
5 AM
8°
1%
6 AM
8°
1%
7 AM
9°
1%
8 AM
14°
1%
9 AM
17°
1%
10 AM
18°
1%
11 AM
20°
1%
12 PM
24°
1%
1 PM
24°
1%
2 PM
24°
1%
3 PM
23°
1%
4 PM
23°
1%
5 PM
21°
1%
6 PM
20°
1%
7 PM
18°
1%
8 PM
17°
1%
9 PM
17°
2%
10 PM
17°
2%
11 PM
17°
3%
7-Day Forecast
Today
24° 14°
Partly Cloudy.
Thu
24° 14°
Haze with a 61% chance of rain.
Fri
23° 9°
Rain, 47% chance.
Sat
18° 6°
Partly Cloudy.
Sun
17° 3°
Mostly Clear.
Mon
17° 1°
Mostly Clear.
Tue
19° 1°
Partly Cloudy.
TimeTempConditionsPrecipWindHumidity
Now 12° Clear 1% 3 mph SSE 90%
1 AM 11° Clear 1% 4 mph SSE 90%
2 AM 11° Clear 1% 4 mph SSE 91%
3 AM 10° Clear 1% 3 mph SE 91%
4 AM 9° Clear 1% 4 mph SE 92%
5 AM 8° Mostly Clear 1% 4 mph SE 93%
6 AM 8° Mostly Clear 1% 4 mph SE 93%
7 AM 9° Mostly Clear 1% 4 mph SE 93%
8 AM 14° Clear 1% 5 mph S 86%
9 AM 17° Clear 1% 7 mph SSW 75%
10 AM 18° Mostly Clear 1% 8 mph SSW 67%
11 AM 20° Partly Cloudy 1% 10 mph S 61%
12 PM 24° Mostly Cloudy 1% 11 mph S 57%
1 PM 24° Mostly Cloudy 1% 11 mph S 54%
2 PM 24° Mostly Cloudy 1% 11 mph S 55%
3 PM 23° Mostly Cloudy 1% 10 mph S 57%
4 PM 23° Mostly Cloudy 1% 10 mph SSE 62%
5 PM 21° Mostly Cloudy 1% 9 mph SSE 68%
6 PM 20° Mostly Cloudy 1% 8 mph SSE 74%
7 PM 18° Mostly Cloudy 1% 7 mph SSE 78%
8 PM 17° Mostly Cloudy 1% 7 mph SSE 80%
9 PM 17° Mostly Cloudy 2% 8 mph SSE 82%
10 PM 17° Mostly Cloudy 2% 8 mph SSE 84%
11 PM 17° Mostly Cloudy 3% 8 mph SSE 84%
15-Day Forecast
Today
11/4
Partly Cloudy
1%
14°
24°
Thu
11/5
Haze
61%
14°
24°
Fri
11/6
Rain
47%
9°
23°
Sat
11/7
Partly Cloudy
4%
6°
18°
Sun
11/8
Mostly Clear
7%
3°
17°
Mon
11/9
Mostly Clear
10%
1°
17°
Tue
11/10
Partly Cloudy
4%
1°
19°
Wed
11/11
Mostly Clear
1%
1°
18°
Thu
11/12
Partly Cloudy
5%
-1°
16°
Fri
11/13
Partly Cloudy
6%
-1°
16°
Sat
11/14
Partly Cloudy
8%
1°
17°
Sun
11/15
Drizzle
74%
3°
16°
Mon
11/16
Drizzle
77%
4°
16°
Tue
11/17
Drizzle
68%
6°
17°
Wed
11/18
Drizzle
78%
5°
16°
72
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
72 AQI 20.5 µg/m³
O3
Ground-level ozone
36 AQI 39 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 72 Moderate 36 72
Thu 52 Moderate 37 52
Fri 32 Good 31 32
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Wed Nov 4, 04:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE14 J/kg
MUCAPE0 J/kg
SBCIN—
MLCIN0 J/kg
Lifted Index15.5
Kinematics
0–6 km Shear7 kt
0–1 km Shear13 kt
Eff. Shear—
0–1 km SRH41
0–3 km SRH61
Eff. SRH—
Storm Motion27° @ 7 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index11.4
Thermo & Levels
PWAT1.00 in
0–3 km LR2.4 °C/km
700–500 LR4.9 °C/km
Total Totals31.2
LCL995 hPa
LFC—
EL—
Freezing Lvl14,032 ft