Grayson County, Kentucky, United States

Last updated: 4:27 PM CDT  ·  Refresh
32°C
Feels like 40°
Partly Cloudy
▲ 32°  /  ▼ 22°
Wind
5 mph SSW
Humidity
70%
Dew Point
25°
Pressure
29.34 inHg
Visibility
10 mi
UV Index
7.3
Cloud Cover
31%
Sunrise
5:27 AM
Sunset
8:10 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Grayson County is currently partly cloudy at 32°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 4367 J/kg) — isolated convective development possible. Sunrise: 5:27AM · Sunset: 8:10PM.

Alerts

No active alerts for this location.
57 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
32°
3%
5 PM
32°
23%
6 PM
31°
23%
7 PM
30°
23%
8 PM
29°
16%
9 PM
28°
16%
10 PM
27°
16%
11 PM
26°
16%
12 AM
26°
16%
1 AM
24°
3%
2 AM
24°
3%
3 AM
24°
3%
4 AM
23°
3%
5 AM
22°
3%
6 AM
23°
3%
7 AM
24°
3%
8 AM
26°
3%
9 AM
28°
3%
10 AM
29°
5%
11 AM
30°
5%
12 PM
31°
5%
1 PM
32°
5%
2 PM
32°
5%
3 PM
32°
6%
7-Day Forecast
Today
32° 22°
Partly Cloudy with a 23% chance of rain.
Wed
34° 22°
Clear.
Thu
35° 23°
Partly Cloudy.
Fri
33° 23°
Clear with a 52% chance of rain.
Sat
30° 22°
Drizzle, 60% chance.
Sun
30° 22°
Thunderstorm, 81% chance.
Mon
29° 22°
Clear with a 35% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 32° Partly Cloudy 3% 5 mph SSW 70%
5 PM 32° Partly Cloudy 23% 5 mph SW 72%
6 PM 31° Partly Cloudy 23% 4 mph SSW 76%
7 PM 30° Partly Cloudy 23% 4 mph SSW 81%
8 PM 29° Mostly Cloudy 16% 3 mph SSW 84%
9 PM 28° Mostly Cloudy 16% 4 mph S 87%
10 PM 27° Mostly Cloudy 16% 4 mph S 89%
11 PM 26° Mostly Cloudy 16% 4 mph S 91%
12 AM 26° Partly Cloudy 16% 4 mph S 92%
1 AM 24° Partly Cloudy 3% 4 mph S 93%
2 AM 24° Mostly Clear 3% 3 mph S 93%
3 AM 24° Clear 3% 3 mph S 94%
4 AM 23° Clear 3% 2 mph S 94%
5 AM 22° Clear 3% 2 mph SSE 94%
6 AM 23° Mostly Clear 3% 2 mph SSE 94%
7 AM 24° Mostly Clear 3% 2 mph SE 90%
8 AM 26° Clear 3% 2 mph SSE 83%
9 AM 28° Clear 3% 2 mph S 77%
10 AM 29° Clear 5% 2 mph SSW 72%
11 AM 30° Clear 5% 2 mph SSW 70%
12 PM 31° Clear 5% 2 mph SSW 69%
1 PM 32° Clear 5% 2 mph SSW 68%
2 PM 32° Clear 5% 2 mph SW 67%
3 PM 32° Clear 6% 3 mph SW 67%
15-Day Forecast
Today
6/30
Partly Cloudy
23%
22°
32°
Wed
7/1
Clear
5%
22°
34°
Thu
7/2
Partly Cloudy
16%
23°
35°
Fri
7/3
Clear
52%
23°
33°
Sat
7/4
Drizzle
60%
22°
30°
Sun
7/5
Thunderstorm
81%
22°
30°
Mon
7/6
Clear
35%
22°
29°
Tue
7/7
Rain
81%
21°
29°
Wed
7/8
Thunderstorm
90%
21°
29°
Thu
7/9
Thunderstorm
60%
21°
29°
Fri
7/10
Drizzle
60%
21°
28°
Sat
7/11
Drizzle
60%
20°
28°
Sun
7/12
Drizzle
60%
19°
28°
Mon
7/13
Drizzle
60%
19°
27°
Tue
7/14
Drizzle
60%
19°
27°
57
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
57 AQI 12.5 µg/m³
O3
Ground-level ozone
32 AQI 36 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 57 Moderate 32 57
Thu 57 Moderate 34 57
Fri 49 Good 33 49
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 Tue Jun 30, 20:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE4445 J/kg
MLCAPE2918 J/kg
MUCAPE4445 J/kg
SBCIN-12 J/kg
MLCIN0 J/kg
Lifted Index-9.0
Kinematics
0–6 km Shear5 kt
0–1 km Shear2 kt
Eff. Shear3 kt
0–1 km SRH-3
0–3 km SRH-22
Eff. SRH-22
Storm Motion199° @ 17 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index15.1
Thermo & Levels
PWAT1.36 in
0–3 km LR6.1 °C/km
700–500 LR7.3 °C/km
Total Totals43.4
LCL897 hPa
LFC883 hPa
EL138 hPa
Freezing Lvl14,951 ft