Updated Saturday morning, August 1, 2026
KATY, TX — Dangerous heat will be the primary weather concern across Katy and surrounding communities Saturday, while a weak summer front could bring a few isolated showers or thunderstorms later in the day.
The National Weather Service has issued a Heat Advisory from 1 p.m. until 7 p.m. Saturday for Katy and portions of Harris, Fort Bend and surrounding Southeast Texas counties. Heat-index values across the advisory area are expected to reach 107 to 110 degrees, with isolated locations potentially feeling as hot as 112 degrees.
What Katy Residents Can Expect Saturday
Katy is forecast to reach a high near 99 degrees, but the combination of heat and humidity could make it feel as hot as 107 degrees. Winds will come from the west at approximately 5 to 10 mph.
There is a 20% chance of showers and thunderstorms after 4 p.m. Any rain that develops is expected to be isolated, meaning many neighborhoods may remain completely dry.
The chance of rain continues into the early evening before decreasing around 9 p.m. Saturday night. Temperatures will fall only to around 78 degrees overnight, providing limited relief from the daytime heat.
Conditions may vary between Katy, Brookshire, Fulshear, Richmond, Sugar Land, Cypress and western Houston. Residents should monitor local radar before attending outdoor events because an isolated storm could affect one community while nearby neighborhoods remain dry.
Will the Summer “Cold” Front Cool Katy?
A weak frontal boundary is expected to move through Southeast Texas Saturday evening or overnight. However, residents should not expect a major temperature drop.
The front may lower humidity slightly and bring drier air into inland communities Sunday, making the heat feel less oppressive. Actual afternoon temperatures will remain extremely hot, reaching the upper 90s or approximately 100 degrees.
The National Weather Service expects Sunday to be mostly sunny with a high near 100 degrees in Katy. Winds will briefly turn northerly behind the front, but this will not be the kind of cold front that produces noticeably cool summer weather.
Even Hotter Weather Arrives Monday
The forecast becomes hotter at the beginning of the workweek:
- Saturday: High near 99; heat index around 107; 20% storm chance
- Sunday: Mostly sunny and hot; high near 100
- Monday: Sunny and extremely hot; high near 102
- Tuesday: Sunny and extremely hot; high near 102
- Wednesday: Sunny; high near 100
- Thursday: Sunny and hot; high near 99
- Friday: Mostly sunny; high near 98
Overnight temperatures will generally remain in the middle to upper 70s.
Forecast temperatures have recently trended higher for Sunday and Monday. Additional heat alerts could become necessary if actual temperatures or heat-index values rise beyond current projections.
Heat Safety Is the Main Concern
Residents working outdoors, attending community events or participating in youth sports should plan frequent breaks and limit strenuous activity during the hottest part of the afternoon.
The National Weather Service recommends drinking plenty of fluids, remaining in air-conditioned areas when possible, avoiding prolonged sun exposure and checking on relatives and neighbors. Children and pets should never be left inside parked vehicles, even briefly.
Anyone who must work outside should use a buddy system and watch for signs that a coworker or family member is becoming sick from the heat.
Stay Weather-Aware
Although widespread severe weather is not currently expected, any isolated thunderstorm can still produce lightning, brief heavy rain and gusty winds. If thunder can be heard, move outdoor activities inside and wait for the storm to pass.
Weather conditions and advisories can change quickly. Residents can follow the National Weather Service Katy forecast, the Houston–Galveston forecast office and NWS heat-safety guidance for the latest official information. app.TheKatyNews.com
