Jefferson County, Pennsylvania, United States

Last updated: 12:14 AM CDT  ·  Refresh
8°C
Feels like 5°
Overcast
▲ 11°  /  ▼ 1°
Wind
10 mph NNW
Humidity
88%
Dew Point
6°
Pressure
28.39 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
95%
Sunrise
7:29 AM
Sunset
6:32 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Jefferson County is currently overcast at 8°C. Dry conditions are expected through the next 24 hours. Sunrise: 7:29AM · Sunset: 6:32PM.

Alerts

No active alerts for this location.
27 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
8°
22%
2 AM
7°
25%
3 AM
6°
11%
4 AM
6°
6%
5 AM
5°
9%
6 AM
4°
21%
7 AM
3°
3%
8 AM
3°
3%
9 AM
3°
3%
10 AM
5°
3%
11 AM
6°
3%
12 PM
7°
3%
1 PM
7°
3%
2 PM
9°
3%
3 PM
10°
3%
4 PM
10°
3%
5 PM
9°
3%
6 PM
8°
3%
7 PM
7°
3%
8 PM
6°
3%
9 PM
6°
3%
10 PM
4°
3%
11 PM
4°
3%
12 AM
4°
3%
7-Day Forecast
Today
11° 1°
Mostly Clear with a 22% chance of rain.
Sun
17° 1°
Clear.
Mon
21° 3°
Clear.
Tue
21° 3°
Clear.
Wed
21° 2°
Clear.
Thu
21° 3°
Clear.
Fri
20° 4°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 8° Overcast 22% 10 mph NNW 88%
2 AM 7° Overcast 25% 10 mph NNW 88%
3 AM 6° Overcast 11% 10 mph N 85%
4 AM 6° Overcast 6% 9 mph N 84%
5 AM 5° Mostly Cloudy 9% 10 mph N 84%
6 AM 4° Overcast 21% 10 mph N 83%
7 AM 3° Overcast 3% 10 mph NNW 81%
8 AM 3° Overcast 3% 10 mph NNW 79%
9 AM 3° Mostly Cloudy 3% 11 mph N 72%
10 AM 5° Mostly Cloudy 3% 10 mph N 66%
11 AM 6° Partly Cloudy 3% 11 mph N 60%
12 PM 7° Mostly Clear 3% 10 mph N 56%
1 PM 7° Mostly Clear 3% 9 mph NNW 51%
2 PM 9° Clear 3% 9 mph NNW 48%
3 PM 10° Clear 3% 8 mph NNW 48%
4 PM 10° Clear 3% 8 mph NNW 48%
5 PM 9° Clear 3% 7 mph NNW 49%
6 PM 8° Clear 3% 6 mph NNW 54%
7 PM 7° Clear 3% 5 mph NNW 60%
8 PM 6° Clear 3% 4 mph NW 63%
9 PM 6° Clear 3% 4 mph NNW 64%
10 PM 4° Clear 3% 4 mph NNW 66%
11 PM 4° Clear 3% 4 mph NNW 67%
12 AM 4° Clear 3% 4 mph NNW 68%
15-Day Forecast
Today
10/17
Mostly Clear
22%
1°
11°
Sun
10/18
Clear
3%
1°
17°
Mon
10/19
Clear
3%
3°
21°
Tue
10/20
Clear
3%
3°
21°
Wed
10/21
Clear
3%
2°
21°
Thu
10/22
Clear
3%
3°
21°
Fri
10/23
Clear
3%
4°
20°
Sat
10/24
Clear
3%
3°
19°
Sun
10/25
Clear
3%
4°
20°
Mon
10/26
Clear
19%
4°
19°
Tue
10/27
Clear
25%
5°
18°
Wed
10/28
Drizzle
60%
4°
17°
Thu
10/29
Clear
60%
4°
17°
Fri
10/30
Drizzle
60%
4°
17°
Sat
10/31
Drizzle
60%
6°
16°
27
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
18 AQI 3.3 µg/m³
O3
Ground-level ozone
Dominant
27 AQI 30 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 27 Good 27 18
Sun 32 Good 32 2
Mon 29 Good 29 4
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 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Sat Oct 17, 04:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 80 90 100 110 120 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE5 J/kg
MLCAPE7 J/kg
MUCAPE0 J/kg
SBCIN-16 J/kg
MLCIN-2 J/kg
Lifted Index13.5
Kinematics
0–6 km Shear95 kt
0–1 km Shear17 kt
Eff. Shear—
0–1 km SRH-176
0–3 km SRH-123
Eff. SRH—
Storm Motion265° @ 44 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index11.8
Thermo & Levels
PWAT0.74 in
0–3 km LR5.4 °C/km
700–500 LR3.7 °C/km
Total Totals31.1
LCL934 hPa
LFC884 hPa
EL814 hPa
Freezing Lvl3,563 ft