Grayson County, Texas, United States

Last updated: 11:44 PM CDT  ·  Refresh
23°C
Feels like 25°
Mostly Cloudy
▲ 30°  /  ▼ 22°
Wind
8 mph E
Humidity
88%
Dew Point
21°
Pressure
29.23 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
77%
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 mostly cloudy at 23°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3190 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
23°
24%
12 AM
24°
34%
1 AM
24°
19%
2 AM
24°
19%
3 AM
24°
19%
4 AM
24°
19%
5 AM
22°
12%
6 AM
22°
7%
7 AM
24°
8%
8 AM
26°
5%
9 AM
28°
5%
10 AM
29°
5%
11 AM
30°
5%
12 PM
31°
5%
1 PM
32°
5%
2 PM
33°
11%
3 PM
33°
11%
4 PM
33°
12%
5 PM
32°
3%
6 PM
32°
3%
7 PM
31°
5%
8 PM
29°
5%
9 PM
29°
9%
10 PM
29°
9%
7-Day Forecast
Tonight
30° 22°
Mostly Cloudy with a 24% chance of rain.
Wed
34° 22°
Partly Cloudy.
Thu
34° 22°
Mostly Clear.
Fri
30° 21°
Partly Cloudy.
Sat
32° 22°
Partly Cloudy.
Sun
33° 22°
Clear.
Mon
34° 23°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 23° Mostly Cloudy 24% 8 mph E 88%
12 AM 24° Overcast 34% 8 mph SE 87%
1 AM 24° Drizzle 19% 7 mph SE 88%
2 AM 24° Drizzle 19% 7 mph SE 88%
3 AM 24° Drizzle 19% 7 mph SE 89%
4 AM 24° Drizzle 19% 6 mph SE 90%
5 AM 22° Mostly Cloudy 12% 6 mph SE 91%
6 AM 22° Mostly Cloudy 7% 6 mph SSE 91%
7 AM 24° Partly Cloudy 8% 7 mph S 87%
8 AM 26° Mostly Cloudy 5% 9 mph SSW 82%
9 AM 28° Partly Cloudy 5% 10 mph SW 77%
10 AM 29° Partly Cloudy 5% 10 mph SW 72%
11 AM 30° Partly Cloudy 5% 9 mph SW 67%
12 PM 31° Partly Cloudy 5% 7 mph SW 61%
1 PM 32° Partly Cloudy 5% 7 mph SSW 58%
2 PM 33° Mostly Clear 11% 9 mph SSW 55%
3 PM 33° Mostly Clear 11% 10 mph S 53%
4 PM 33° Mostly Clear 12% 10 mph S 52%
5 PM 32° Mostly Clear 3% 9 mph S 52%
6 PM 32° Clear 3% 8 mph S 52%
7 PM 31° Mostly Clear 5% 8 mph S 54%
8 PM 29° Mostly Clear 5% 9 mph S 56%
9 PM 29° Partly Cloudy 9% 9 mph S 59%
10 PM 29° Partly Cloudy 9% 9 mph S 62%
15-Day Forecast
Today
6/23
Mostly Cloudy
24%
22°
30°
Wed
6/24
Partly Cloudy
19%
22°
34°
Thu
6/25
Mostly Clear
12%
22°
34°
Fri
6/26
Partly Cloudy
7%
21°
30°
Sat
6/27
Partly Cloudy
9%
22°
32°
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°
33°
Fri
7/3
Clear
28%
23°
36°
Sat
7/4
Clear
38%
25°
36°
Sun
7/5
Clear
66%
25°
36°
Mon
7/6
Drizzle
66%
25°
36°
Tue
7/7
Clear
66%
24°
36°
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, 03:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE580 J/kg
MLCAPE1404 J/kg
MUCAPE2566 J/kg
SBCIN-444 J/kg
MLCIN0 J/kg
Lifted Index-2.4
Kinematics
0–6 km Shear35 kt
0–1 km Shear24 kt
Eff. Shear58 kt
0–1 km SRH243
0–3 km SRH181
Eff. SRH-41
Storm Motion277° @ 24 kt
0–1 km EHI0.9
Composite Parameters
Sig. Tornado1.0
STP (eff)0.0
Supercell0.0
K-Index34.7
Thermo & Levels
PWAT1.75 in
0–3 km LR4.0 °C/km
700–500 LR6.8 °C/km
Total Totals49.8
LCL961 hPa
LFC652 hPa
EL278 hPa
Freezing Lvl14,780 ft