Collin County, TX Weather Forecast
County weather hub
Mostly Sunny
Compare major city weather across Collin County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Mostly sunny, with a high near 107. Heat index values as high as 108. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
County Weather Overview
This county weather page brings together forecast coverage for Collin County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 17 of 17 mapped cities in Collin County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Aug 24 to Aug 30, 2026
- Latest sync
- Aug 24, 2026 3:03 PM CDT
- Forecast office
- FWD
- Source
- NOAA / NWS
Daily Outlook
This Week in Collin County
This Afternoon looks like the warmest upcoming period in Collin County at 107 degrees F.
Thursday Night is the coolest period ahead with temperatures near 76 degrees F.
The strongest winds are forecast for This Afternoon at about 10 to 15 mph SSW.
The forecast from Aug 24 through Aug 30 stays mostly dry.
Forecast Details
- Last updated
- Aug 24, 2026 3:03 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- FWD
- Radar station
- KFWS
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear. Low around 82, with temperatures rising to around 85 overnight. Heat index values as high as 107. South wind 10 to 15 mph, with gusts as high as 25 mph.
Mostly sunny, with a high near 106. Heat index values as high as 105. South southwest wind 10 to 15 mph.
Mostly clear. Low around 81, with temperatures rising to around 83 overnight. Heat index values as high as 104. South wind 5 to 10 mph.
Mostly sunny. High near 102, with temperatures falling to around 100 in the afternoon. West wind around 10 mph.
Partly cloudy. Low around 77, with temperatures rising to around 79 overnight. North wind around 5 mph.
Mostly sunny, with a high near 100. Northeast wind 5 to 10 mph.
Partly cloudy, with a low around 76. East wind 5 to 10 mph.
Sunny, with a high near 100. East southeast wind 5 to 10 mph.
Mostly clear, with a low around 77.
Sunny, with a high near 100.
Clear, with a low around 78.
Sunny, with a high near 101.
Clear, with a low around 78.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Aug 24
|
Mostly Sunny
|
107°F |
10 to 15 mph
SSW
|
|
Tonight
Aug 24
|
Mostly Clear
|
82°F |
10 to 15 mph
S
|
|
Tuesday
Aug 25
|
Mostly Sunny
|
106°F |
10 to 15 mph
SSW
|
|
Tuesday Night
Aug 25
|
Mostly Clear
|
81°F |
5 to 10 mph
S
|
|
Wednesday
Aug 26
|
Mostly Sunny
|
102°F |
10 mph
W
|
|
Wednesday Night
Aug 26
|
Partly Cloudy
|
77°F |
5 mph
N
|
|
Thursday
Aug 27
|
Mostly Sunny
|
100°F |
5 to 10 mph
NE
|
|
Thursday Night
Aug 27
|
Partly Cloudy
|
76°F |
5 to 10 mph
E
|
|
Friday
Aug 28
|
Sunny
|
100°F |
5 to 10 mph
ESE
|
|
Friday Night
Aug 28
|
Mostly Clear
|
77°F |
5 to 10 mph
SE
|
|
Saturday
Aug 29
|
Sunny
|
100°F |
5 to 10 mph
SSE
|
|
Saturday Night
Aug 29
|
Clear
|
78°F |
10 mph
SSE
|
|
Sunday
Aug 30
|
Sunny
|
101°F |
10 to 15 mph
S
|
|
Sunday Night
Aug 30
|
Clear
|
78°F |
10 to 15 mph
S
|
Major City Forecasts
Live forecast snapshots for major cities across Collin County.
Coverage
Forecast coverage currently spans 17 of 17 mapped cities in Collin County.
Largest mapped city population in this region: 291,296.
