Caldwell- Including the cities of Clarks, Grayson, and Columbia 1229 PM CDT Sun Jul 20 2025 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT MONDAY... .REST OF TODAY...Partly cloudy. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 109. .TONIGHT...Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 106 early in the evening. .MONDAY...Mostly sunny. Hot with highs in the upper 90s. Southwest winds around 5 mph. Heat index values up to 107. .MONDAY NIGHT...Mostly clear. Lows in the mid 70s. Southwest winds around 5 mph. Heat index values up to 105 early in the evening. .TUESDAY...Mostly sunny. Hot with highs in the upper 90s. Southwest winds around 5 mph. Heat index values up to 109. .TUESDAY NIGHT...Mostly clear. Lows in the upper 70s. Heat index values up to 105 early in the evening. .WEDNESDAY...Mostly sunny. Hot with highs in the upper 90s. Heat index values up to 110. .WEDNESDAY NIGHT...Partly cloudy. Lows in the mid 70s. Heat index values up to 105 early in the evening. .THURSDAY...Partly cloudy in the morning, then mostly cloudy with a chance of showers and thunderstorms in the afternoon. Hot with highs in the upper 90s. Chance of rain 30 percent. Heat index values up to 110. .THURSDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. Lows in the mid 70s. Heat index values up to 105 early in the evening. .FRIDAY...Partly cloudy. A chance of showers and thunderstorms in the afternoon. Highs in the mid 90s. Chance of rain 40 percent. Heat index values up to 110. .FRIDAY NIGHT...Partly cloudy. Lows in the mid 70s. .SATURDAY...Partly cloudy. A chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 50 percent. Heat index values up to 105.