Collin County, Texas, United States

Last updated: 10:08 PM CDT  ·  Refresh
28°C
Feels like 31°
Overcast
▲ 32°  /  ▼ 24°
Wind
7 mph SE
Humidity
74%
Dew Point
23°
Pressure
29.39 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
87%
Sunrise
6:18 AM
Sunset
8:39 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Collin County is currently overcast at 28°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2768 J/kg) — isolated convective development possible. Sunrise: 6:18AM · Sunset: 8:39PM.

Alerts

No active alerts for this location.
49 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
28°
8%
11 PM
28°
19%
12 AM
27°
19%
1 AM
27°
12%
2 AM
26°
12%
3 AM
26°
12%
4 AM
26°
20%
5 AM
26°
20%
6 AM
24°
16%
7 AM
24°
13%
8 AM
26°
13%
9 AM
27°
13%
10 AM
29°
5%
11 AM
31°
5%
12 PM
32°
5%
1 PM
33°
5%
2 PM
33°
5%
3 PM
34°
5%
4 PM
34°
3%
5 PM
37°
3%
6 PM
34°
3%
7 PM
33°
3%
8 PM
32°
5%
9 PM
31°
5%
7-Day Forecast
Tonight
32° 24°
Overcast.
Wed
38° 24°
Partly Cloudy with a 20% chance of rain.
Thu
34° 23°
Clear.
Fri
31° 23°
Partly Cloudy.
Sat
33° 22°
Clear.
Sun
33° 22°
Clear.
Mon
34° 23°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 28° Overcast 8% 7 mph SE 74%
11 PM 28° Mostly Cloudy 19% 9 mph SE 74%
12 AM 27° Drizzle 19% 11 mph SE 75%
1 AM 27° Overcast 12% 11 mph SSE 76%
2 AM 26° Mostly Cloudy 12% 9 mph SSE 79%
3 AM 26° Overcast 12% 7 mph SSE 82%
4 AM 26° Mostly Cloudy 20% 5 mph SSE 84%
5 AM 26° Overcast 20% 5 mph S 84%
6 AM 24° Mostly Cloudy 16% 6 mph S 84%
7 AM 24° Partly Cloudy 13% 7 mph S 84%
8 AM 26° Partly Cloudy 13% 10 mph SSW 80%
9 AM 27° Partly Cloudy 13% 10 mph SW 76%
10 AM 29° Partly Cloudy 5% 10 mph SW 72%
11 AM 31° Partly Cloudy 5% 9 mph SW 66%
12 PM 32° Partly Cloudy 5% 8 mph SSW 60%
1 PM 33° Mostly Clear 5% 9 mph SSW 54%
2 PM 33° Mostly Clear 5% 10 mph SSW 50%
3 PM 34° Partly Cloudy 5% 10 mph SSW 46%
4 PM 34° Partly Cloudy 3% 10 mph S 43%
5 PM 37° Mostly Clear 3% 10 mph S 44%
6 PM 34° Mostly Clear 3% 10 mph S 46%
7 PM 33° Mostly Clear 3% 9 mph S 47%
8 PM 32° Mostly Clear 5% 10 mph S 51%
9 PM 31° Clear 5% 11 mph S 54%
15-Day Forecast
Today
6/23
Overcast
8%
24°
32°
Wed
6/24
Partly Cloudy
20%
24°
38°
Thu
6/25
Clear
12%
23°
34°
Fri
6/26
Partly Cloudy
3%
23°
31°
Sat
6/27
Clear
7%
22°
33°
Sun
6/28
Clear
6%
22°
33°
Mon
6/29
Clear
6%
23°
34°
Tue
6/30
Clear
11%
23°
34°
Wed
7/1
Rain
67%
23°
33°
Thu
7/2
Clear
25%
23°
33°
Fri
7/3
Drizzle
38%
24°
36°
Sat
7/4
Drizzle
60%
26°
36°
Sun
7/5
Clear
32%
26°
36°
Mon
7/6
Drizzle
60%
26°
36°
Tue
7/7
Clear
60%
26°
36°
49
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
49 AQI 8.9 µg/m³
O3
Ground-level ozone
40 AQI 43 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 49 Good 40 49
Thu 59 Moderate 42 59
Fri 62 Moderate 35 62
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
SBCAPE2094 J/kg
MLCAPE1917 J/kg
MUCAPE2311 J/kg
SBCIN-361 J/kg
MLCIN0 J/kg
Lifted Index-6.1
Kinematics
0–6 km Shear36 kt
0–1 km Shear19 kt
Eff. Shear58 kt
0–1 km SRH137
0–3 km SRH85
Eff. SRH-85
Storm Motion263° @ 24 kt
0–1 km EHI1.8
Composite Parameters
Sig. Tornado1.6
STP (eff)0.0
Supercell0.0
K-Index30.8
Thermo & Levels
PWAT1.75 in
0–3 km LR5.1 °C/km
700–500 LR7.2 °C/km
Total Totals51.4
LCL925 hPa
LFC698 hPa
EL161 hPa
Freezing Lvl14,941 ft