Grayson County, Texas, United States

Last updated: 1:16 PM CDT  ·  Refresh
32°C
Feels like 36°
Partly Cloudy
▲ 33°  /  ▼ 22°
Wind
4 mph SSW
Humidity
57%
Dew Point
22°
Pressure
29.26 inHg
Visibility
10 mi
UV Index
9.1
Cloud Cover
47%
Sunrise
6:25 AM
Sunset
8:38 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Grayson County is currently partly cloudy at 32°C. Precipitation is likely — peak probability 90% around 6 PM. Atmospheric instability is elevated (CAPE up to 1502 J/kg) — isolated convective development possible. Sunrise: 6:25AM · Sunset: 8:38PM.

Alerts

No active alerts for this location.
51 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
32°
47%
2 PM
31°
52%
3 PM
31°
61%
4 PM
30°
81%
5 PM
27°
87%
6 PM
28°
90%
7 PM
27°
90%
8 PM
27°
90%
9 PM
27°
85%
10 PM
25°
69%
11 PM
24°
74%
12 AM
24°
80%
1 AM
24°
71%
2 AM
24°
57%
3 AM
23°
61%
4 AM
23°
63%
5 AM
23°
68%
6 AM
22°
68%
7 AM
22°
68%
8 AM
22°
68%
9 AM
23°
69%
10 AM
24°
69%
11 AM
24°
69%
12 PM
25°
64%
7-Day Forecast
Today
33° 22°
Heavy Rain, 90% chance.
Mon
30° 22°
Fog with a 71% chance of rain.
Tue
31° 21°
Fog with a 31% chance of rain.
Wed
30° 22°
Mostly Cloudy with a 30% chance of rain.
Thu
33° 23°
Clear.
Fri
35° 22°
Clear.
Sat
36° 24°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 32° Partly Cloudy 47% 4 mph SSW 57%
2 PM 31° Partly Cloudy 52% 4 mph S 58%
3 PM 31° Mostly Cloudy 61% 4 mph ESE 61%
4 PM 30° Mostly Cloudy 81% 5 mph ESE 63%
5 PM 27° Heavy Rain 87% 9 mph E 69%
6 PM 28° Thunderstorm 90% 9 mph ENE 75%
7 PM 27° Heavy Rain 90% 8 mph E 80%
8 PM 27° Mostly Cloudy 90% 7 mph E 83%
9 PM 27° Mostly Cloudy 85% 6 mph ESE 86%
10 PM 25° Mostly Cloudy 69% 6 mph ESE 89%
11 PM 24° Mostly Cloudy 74% 5 mph SE 92%
12 AM 24° Rain 80% 6 mph SSE 94%
1 AM 24° Partly Cloudy 71% 5 mph SSE 96%
2 AM 24° Partly Cloudy 57% 4 mph SE 96%
3 AM 23° Partly Cloudy 61% 4 mph ESE 97%
4 AM 23° Mostly Cloudy 63% 5 mph E 97%
5 AM 23° Haze 68% 5 mph E 97%
6 AM 22° Haze 68% 6 mph E 97%
7 AM 22° Fog 68% 6 mph E 96%
8 AM 22° Fog 68% 6 mph E 94%
9 AM 23° Fog 69% 6 mph E 92%
10 AM 24° Haze 69% 6 mph E 90%
11 AM 24° Mostly Cloudy 69% 6 mph E 88%
12 PM 25° Mostly Cloudy 64% 6 mph ESE 85%
15-Day Forecast
Today
7/12
Heavy Rain
90%
22°
33°
Mon
7/13
Fog
71%
22°
30°
Tue
7/14
Fog
31%
21°
31°
Wed
7/15
Mostly Cloudy
30%
22°
30°
Thu
7/16
Clear
8%
23°
33°
Fri
7/17
Clear
9%
22°
35°
Sat
7/18
Clear
9%
24°
36°
Sun
7/19
Clear
25%
25°
37°
Mon
7/20
Clear
25%
26°
37°
Tue
7/21
Drizzle
60%
26°
39°
Wed
7/22
Clear
60%
25°
37°
Thu
7/23
Clear
25%
25°
38°
Fri
7/24
Clear
25%
26°
38°
Sat
7/25
Drizzle
60%
26°
38°
Sun
7/26
Drizzle
60%
26°
38°
51
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
51 AQI 9.1 µg/m³
O3
Ground-level ozone
40 AQI 44 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 51 Moderate 40 51
Tue 35 Good 35 26
Wed 40 Good 40 32
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 Sun Jul 12, 17:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE2034 J/kg
MLCAPE1295 J/kg
MUCAPE2034 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-5.6
Kinematics
0–6 km Shear9 kt
0–1 km Shear1 kt
Eff. Shear11 kt
0–1 km SRH3
0–3 km SRH-11
Eff. SRH-11
Storm Motion205° @ 19 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index39.5
Thermo & Levels
PWAT2.08 in
0–3 km LR7.8 °C/km
700–500 LR5.4 °C/km
Total Totals47.4
LCL862 hPa
LFC991 hPa
EL193 hPa
Freezing Lvl15,033 ft