Grayson County, Texas, United States

Last updated: 10:06 PM CDT  ·  Refresh
24°C
Feels like 27°
Overcast
▲ 30°  /  ▼ 22°
Wind
7 mph E
Humidity
83%
Dew Point
22°
Pressure
29.21 inHg
Visibility
9 mi
UV Index
0.0
Cloud Cover
91%
Sunrise
6:17 AM
Sunset
8:40 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Grayson County is currently overcast at 24°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3295 J/kg) — isolated convective development possible. Sunrise: 6:17AM · Sunset: 8:40PM.

Alerts

No active alerts for this location.
42 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
24°
8%
11 PM
24°
19%
12 AM
24°
19%
1 AM
24°
19%
2 AM
24°
19%
3 AM
24°
19%
4 AM
24°
19%
5 AM
24°
20%
6 AM
22°
12%
7 AM
23°
8%
8 AM
25°
8%
9 AM
27°
17%
10 AM
28°
18%
11 AM
29°
18%
12 PM
31°
5%
1 PM
32°
5%
2 PM
32°
5%
3 PM
33°
5%
4 PM
33°
3%
5 PM
34°
3%
6 PM
32°
3%
7 PM
31°
3%
8 PM
30°
5%
9 PM
29°
5%
7-Day Forecast
Tonight
30° 22°
Overcast.
Wed
35° 22°
Partly Cloudy.
Thu
33° 22°
Clear.
Fri
31° 22°
Partly Cloudy.
Sat
33° 22°
Clear.
Sun
33° 22°
Clear.
Mon
34° 23°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 24° Overcast 8% 7 mph E 83%
11 PM 24° Overcast 19% 8 mph ESE 83%
12 AM 24° Drizzle 19% 8 mph ESE 86%
1 AM 24° Drizzle 19% 9 mph SE 88%
2 AM 24° Drizzle 19% 7 mph SE 88%
3 AM 24° Drizzle 19% 6 mph SE 89%
4 AM 24° Drizzle 19% 7 mph SE 89%
5 AM 24° Drizzle 20% 6 mph SSE 89%
6 AM 22° Mostly Cloudy 12% 6 mph SSE 89%
7 AM 23° Mostly Cloudy 8% 6 mph SSE 89%
8 AM 25° Partly Cloudy 8% 8 mph S 84%
9 AM 27° Partly Cloudy 17% 10 mph SSW 79%
10 AM 28° Mostly Clear 18% 10 mph SW 74%
11 AM 29° Partly Cloudy 18% 10 mph SW 70%
12 PM 31° Partly Cloudy 5% 9 mph SW 65%
1 PM 32° Partly Cloudy 5% 9 mph SW 60%
2 PM 32° Partly Cloudy 5% 9 mph SW 56%
3 PM 33° Partly Cloudy 5% 9 mph SSW 53%
4 PM 33° Mostly Cloudy 3% 10 mph SSW 50%
5 PM 34° Partly Cloudy 3% 9 mph SSW 51%
6 PM 32° Partly Cloudy 3% 8 mph S 53%
7 PM 31° Partly Cloudy 3% 7 mph S 55%
8 PM 30° Partly Cloudy 5% 8 mph S 57%
9 PM 29° Partly Cloudy 5% 8 mph SSE 58%
15-Day Forecast
Today
6/23
Overcast
8%
22°
30°
Wed
6/24
Partly Cloudy
19%
22°
35°
Thu
6/25
Clear
12%
22°
33°
Fri
6/26
Partly Cloudy
16%
22°
31°
Sat
6/27
Clear
9%
22°
33°
Sun
6/28
Clear
8%
22°
33°
Mon
6/29
Clear
8%
23°
34°
Tue
6/30
Clear
13%
23°
34°
Wed
7/1
Clear
29%
22°
34°
Thu
7/2
Clear
28%
22°
34°
Fri
7/3
Clear
28%
23°
37°
Sat
7/4
Clear
38%
25°
37°
Sun
7/5
Clear
66%
25°
37°
Mon
7/6
Drizzle
66%
25°
37°
Tue
7/7
Clear
66%
24°
37°
42
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
40 AQI 7.3 µg/m³
O3
Ground-level ozone
Dominant
42 AQI 45 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 42 Good 42 40
Thu 56 Moderate 45 56
Fri 61 Moderate 35 61
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 Wed Jun 24, 01:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE991 J/kg
MLCAPE1046 J/kg
MUCAPE1433 J/kg
SBCIN-540 J/kg
MLCIN0 J/kg
Lifted Index-4.1
Kinematics
0–6 km Shear38 kt
0–1 km Shear20 kt
Eff. Shear—
0–1 km SRH184
0–3 km SRH104
Eff. SRH—
Storm Motion268° @ 23 kt
0–1 km EHI1.1
Composite Parameters
Sig. Tornado1.3
STP (eff)—
Supercell—
K-Index29.5
Thermo & Levels
PWAT1.50 in
0–3 km LR4.3 °C/km
700–500 LR7.0 °C/km
Total Totals46.2
LCL955 hPa
LFC664 hPa
EL189 hPa
Freezing Lvl14,974 ft