Heat Advisory — Grayson, TX, Fannin, TX, Lamar, TX, Denton, TX, Collin, TX, Hunt, TX, Delta, TX, Hopkins, TX, Tarrant, TX, Dallas, TX, Rockwall, TX, Kaufman, TX, Van Zandt, TX, Rains, TX, Johnson, TX, Ellis, TX, Henderson, TX, Hill, TX, Navarro, TX, Freestone, TX, Anderson, TX, Bell, TX, McLennan, TX, Falls, TX, Limestone, TX, Leon, TX, Milam, TX, Robertson, TX 8:00 PM

Leon County, Texas, United States

Last updated: 3:48 PM CDT  ·  Refresh
95°F
Feels like 100°
Mostly Clear
▲ 96°  /  ▼ 73°
Wind
7 mph SSE
Humidity
41%
Dew Point
71°
Pressure
29.53 inHg
Visibility
10 mi
UV Index
8.0
Cloud Cover
14%
Sunrise
7:06 AM
Sunset
7:32 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Leon County is currently mostly clear at 95°F. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2629 J/kg) — isolated convective development possible. Sunrise: 7:06AM · Sunset: 7:32PM.

Alerts

Heat Advisory
Grayson, TX, Fannin, TX, Lamar, TX, Denton, TX, Collin, TX, Hunt, TX, Delta, TX, Hopkins, TX, Tarrant, TX, Dallas, TX, Rockwall, TX, Kaufman, TX, Van Zandt, TX, Rains, TX, Johnson, TX, Ellis, TX, Henderson, TX, Hill, TX, Navarro, TX, Freestone, TX, Anderson, TX, Bell, TX, McLennan, TX, Falls, TX, Limestone, TX, Leon, TX, Milam, TX, Robertson, TX
Expires 8:00 PM
31 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
95°
4%
4 PM
96°
5%
5 PM
95°
5%
6 PM
91°
8%
7 PM
88°
8%
8 PM
86°
5%
9 PM
83°
5%
10 PM
81°
5%
11 PM
80°
5%
12 AM
79°
3%
1 AM
78°
3%
2 AM
77°
3%
3 AM
76°
3%
4 AM
76°
3%
5 AM
73°
17%
6 AM
73°
17%
7 AM
74°
24%
8 AM
76°
20%
9 AM
80°
20%
10 AM
84°
20%
11 AM
85°
21%
12 PM
87°
21%
1 PM
90°
21%
2 PM
91°
25%
7-Day Forecast
Today
96° 73°
Mostly Clear.
Mon
99° 73°
Partly Cloudy with a 28% chance of rain.
Tue
99° 72°
Mostly Clear.
Wed
94° 70°
Mostly Clear.
Thu
96° 72°
Clear.
Fri
97° 70°
Clear.
Sat
98° 70°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 95° Mostly Clear 4% 7 mph SSE 41%
4 PM 96° Mostly Clear 5% 9 mph SE 42%
5 PM 95° Mostly Clear 5% 10 mph SSE 48%
6 PM 91° Clear 8% 11 mph SSE 58%
7 PM 88° Clear 8% 10 mph SSE 63%
8 PM 86° Clear 5% 9 mph SSE 65%
9 PM 83° Clear 5% 8 mph SSE 67%
10 PM 81° Clear 5% 7 mph S 71%
11 PM 80° Mostly Clear 5% 7 mph S 74%
12 AM 79° Partly Cloudy 3% 6 mph S 77%
1 AM 78° Partly Cloudy 3% 6 mph S 81%
2 AM 77° Partly Cloudy 3% 5 mph S 85%
3 AM 76° Mostly Clear 3% 4 mph S 89%
4 AM 76° Mostly Clear 3% 4 mph S 91%
5 AM 73° Mostly Clear 17% 4 mph S 92%
6 AM 73° Partly Cloudy 17% 4 mph S 94%
7 AM 74° Mostly Clear 24% 4 mph S 90%
8 AM 76° Mostly Clear 20% 5 mph S 83%
9 AM 80° Clear 20% 5 mph S 76%
10 AM 84° Mostly Clear 20% 6 mph S 72%
11 AM 85° Mostly Clear 21% 6 mph S 67%
12 PM 87° Mostly Clear 21% 6 mph S 62%
1 PM 90° Partly Cloudy 21% 7 mph S 60%
2 PM 91° Partly Cloudy 25% 8 mph S 60%
15-Day Forecast
Today
9/13
Mostly Clear
8%
73°
96°
Mon
9/14
Partly Cloudy
28%
73°
99°
Tue
9/15
Mostly Clear
8%
72°
99°
Wed
9/16
Mostly Clear
3%
70°
94°
Thu
9/17
Clear
3%
72°
96°
Fri
9/18
Clear
9%
70°
97°
Sat
9/19
Clear
19%
70°
98°
Sun
9/20
Clear
60%
70°
95°
Mon
9/21
Drizzle
60%
70°
94°
Tue
9/22
Drizzle
60%
65°
92°
Wed
9/23
Drizzle
60%
66°
91°
Thu
9/24
Drizzle
60%
69°
91°
Fri
9/25
Clear
25%
68°
90°
Sat
9/26
Clear
60%
67°
91°
Sun
9/27
Clear
25%
67°
91°
31
Good
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

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

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
31 AQI 5.6 µg/m³
O3
Ground-level ozone
30 AQI 33 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 31 Good 30 31
Tue 36 Good 36 24
Wed 33 Good 33 28
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 Sep 13, 19:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE2709 J/kg
MLCAPE1556 J/kg
MUCAPE2709 J/kg
SBCIN0 J/kg
MLCIN-16 J/kg
Lifted Index-4.6
Kinematics
0–6 km Shear5 kt
0–1 km Shear4 kt
Eff. Shear10 kt
0–1 km SRH-10
0–3 km SRH16
Eff. SRH16
Storm Motion109° @ 15 kt
0–1 km EHI-0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index30.0
Thermo & Levels
PWAT1.75 in
0–3 km LR8.0 °C/km
700–500 LR5.5 °C/km
Total Totals44.6
LCL827 hPa
LFC1000 hPa
EL148 hPa
Freezing Lvl16,430 ft