Collin County, TX Weather Forecast
County weather hub
Mostly Clear
Compare major city weather across Collin County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Mostly clear. Low around 78, with temperatures rising to around 80 overnight. South southwest wind around 10 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
- Jul 10 to Jul 16, 2026
- Latest sync
- Jul 10, 2026 7:32 AM CDT
- Forecast office
- FWD
- Source
- NOAA / NWS
Daily Outlook
This Week in Collin County
Friday looks like the warmest upcoming period in Collin County at 99 degrees F.
Monday Night is the coolest period ahead with temperatures near 74 degrees F.
The strongest winds are forecast for Friday at about 10 to 15 mph SSW.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 10, 2026 7:32 AM 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
Sunny, with a high near 99. Heat index values as high as 103. South southwest wind 10 to 15 mph.
Mostly clear. Low around 78, with temperatures rising to around 80 overnight. Heat index values as high as 102. South wind 10 to 15 mph, with gusts as high as 25 mph.
Sunny, with a high near 98. Heat index values as high as 104. South wind around 10 mph.
Mostly clear, with a low around 80. South wind 5 to 10 mph.
A chance of showers and thunderstorms after 7am. Mostly sunny. High near 96, with temperatures falling to around 94 in the afternoon. South southwest wind around 5 mph. Chance of precipitation is 40%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 75. South southeast wind 0 to 5 mph. Chance of precipitation is 60%.
A chance of showers and thunderstorms. Partly sunny, with a high near 93. East southeast wind 5 to 10 mph. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 74. Southeast wind 0 to 10 mph. Chance of precipitation is 30%.
A chance of rain showers before 7am, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 92. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 74. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms after 7am. Mostly sunny, with a high near 92. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 75. Chance of precipitation is 20%.
Mostly sunny, with a high near 95.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Jul 10
|
Mostly Clear
|
78°F |
10 mph
SSW
|
|
Friday
Jul 10
|
Sunny
|
99°F |
10 to 15 mph
SSW
|
|
Friday Night
Jul 10
|
Mostly Clear
|
78°F |
10 to 15 mph
S
|
|
Saturday
Jul 11
|
Sunny
|
98°F |
10 mph
S
|
|
Saturday Night
Jul 11
|
Mostly Clear
|
80°F |
5 to 10 mph
S
|
|
Sunday
Jul 12
|
Chance Showers And Thunderstorms
|
96°F |
5 mph
SSW
|
|
Sunday Night
Jul 12
|
Showers And Thunderstorms Likely
|
75°F |
0 to 5 mph
SSE
|
|
Monday
Jul 13
|
Chance Showers And Thunderstorms
|
93°F |
5 to 10 mph
ESE
|
|
Monday Night
Jul 13
|
Chance Showers And Thunderstorms
|
74°F |
0 to 10 mph
SE
|
|
Tuesday
Jul 14
|
Slight Chance Showers And Thunderstorms
|
92°F |
0 to 10 mph
ESE
|
|
Tuesday Night
Jul 14
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
74°F |
0 to 10 mph
SSE
|
|
Wednesday
Jul 15
|
Slight Chance Showers And Thunderstorms
|
92°F |
0 to 5 mph
S
|
|
Wednesday Night
Jul 15
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
75°F |
5 mph
SSE
|
|
Thursday
Jul 16
|
Mostly Sunny
|
95°F |
5 to 10 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.
