Lancaster County, Pennsylvania, United States

Last updated: 9:09 PM CDT  ·  Refresh
18°C
Feels like 18°
Mostly Clear
▲ 26°  /  ▼ 14°
Wind
7 mph N
Humidity
90%
Dew Point
16°
Pressure
29.62 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
27%
Sunrise
6:21 AM
Sunset
7:54 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Lancaster County is currently mostly clear at 18°C. Dry conditions are expected through the next 24 hours. Sunrise: 6:21AM · Sunset: 7:54PM.

Alerts

No active alerts for this location.
52 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
18°
3%
11 PM
18°
21%
12 AM
17°
21%
1 AM
17°
14%
2 AM
17°
3%
3 AM
16°
3%
4 AM
16°
3%
5 AM
14°
3%
6 AM
14°
3%
7 AM
15°
3%
8 AM
16°
3%
9 AM
18°
5%
10 AM
19°
5%
11 AM
21°
5%
12 PM
22°
5%
1 PM
24°
8%
2 PM
25°
9%
3 PM
25°
11%
4 PM
26°
11%
5 PM
25°
21%
6 PM
24°
21%
7 PM
23°
19%
8 PM
23°
19%
9 PM
21°
29%
7-Day Forecast
Tonight
26° 14°
Mostly Clear.
Fri
26° 14°
Partly Cloudy with a 29% chance of rain.
Sat
24° 17°
Rain, 75% chance.
Sun
27° 15°
Mostly Cloudy with a 50% chance of rain.
Mon
26° 14°
Clear.
Tue
26° 14°
Rain, 70% chance.
Wed
27° 16°
Drizzle, 71% chance.
TimeTempConditionsPrecipWindHumidity
Now 18° Mostly Clear 3% 7 mph N 90%
11 PM 18° Clear 21% 5 mph NNW 91%
12 AM 17° Mostly Clear 21% 5 mph NNW 92%
1 AM 17° Partly Cloudy 14% 5 mph NNW 93%
2 AM 17° Partly Cloudy 3% 4 mph NNW 94%
3 AM 16° Partly Cloudy 3% 4 mph NW 94%
4 AM 16° Partly Cloudy 3% 4 mph NW 94%
5 AM 14° Partly Cloudy 3% 4 mph NNW 95%
6 AM 14° Partly Cloudy 3% 4 mph NNW 94%
7 AM 15° Partly Cloudy 3% 5 mph NNW 92%
8 AM 16° Mostly Cloudy 3% 6 mph NNW 89%
9 AM 18° Partly Cloudy 5% 6 mph N 84%
10 AM 19° Partly Cloudy 5% 7 mph N 78%
11 AM 21° Partly Cloudy 5% 6 mph N 74%
12 PM 22° Partly Cloudy 5% 6 mph N 69%
1 PM 24° Partly Cloudy 8% 5 mph NNE 65%
2 PM 25° Mostly Clear 9% 4 mph NNE 61%
3 PM 25° Mostly Clear 11% 4 mph NNE 60%
4 PM 26° Mostly Clear 11% 4 mph NNE 60%
5 PM 25° Mostly Clear 21% 4 mph NNE 60%
6 PM 24° Mostly Clear 21% 3 mph NNE 64%
7 PM 23° Mostly Clear 19% 3 mph N 67%
8 PM 23° Mostly Clear 19% 2 mph N 71%
9 PM 21° Mostly Clear 29% 3 mph N 74%
15-Day Forecast
Today
8/20
Mostly Clear
3%
14°
26°
Fri
8/21
Partly Cloudy
29%
14°
26°
Sat
8/22
Rain
75%
17°
24°
Sun
8/23
Mostly Cloudy
50%
15°
27°
Mon
8/24
Clear
8%
14°
26°
Tue
8/25
Rain
70%
14°
26°
Wed
8/26
Drizzle
71%
16°
27°
Thu
8/27
Rain
82%
18°
26°
Fri
8/28
Rain
68%
18°
28°
Sat
8/29
Rain
68%
18°
28°
Sun
8/30
Rain
77%
18°
29°
Mon
8/31
Drizzle
60%
16°
29°
Tue
9/1
Drizzle
60%
16°
27°
Wed
9/2
Drizzle
60%
16°
27°
Thu
9/3
Drizzle
60%
16°
26°
52
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
52 AQI 9.9 µg/m³
O3
Ground-level ozone
33 AQI 36 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 52 Moderate 33 52
Sat 38 Good 37 38
Sun 54 Moderate 24 54
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 Thu Aug 20, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 80 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE7 J/kg
MUCAPE0 J/kg
SBCIN—
MLCIN0 J/kg
Lifted Index6.4
Kinematics
0–6 km Shear33 kt
0–1 km Shear24 kt
Eff. Shear—
0–1 km SRH-163
0–3 km SRH-27
Eff. SRH—
Storm Motion312° @ 29 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index30.9
Thermo & Levels
PWAT1.64 in
0–3 km LR3.6 °C/km
700–500 LR5.4 °C/km
Total Totals41.1
LCL978 hPa
LFC—
EL—
Freezing Lvl15,190 ft