Friday, July 17, 2026, is starting off like a Houston summer classic: clear but incredibly muggy, with temperatures around 79°F and dew points near 77°F making the air feel downright sticky before breakfast. Forecasters expect mostly sunny skies and a high near 93°F today, with a slight chance of showers and thunderstorms after about 3 p.m. Heat index readings could push close to 102°F, and tonight will stay warm and humid with lows near 79°F as a drier, more stable pattern settles in for the weekend.
Afternoon Storm Chance
The odds of rain are low, but not zero. There is only a slight, roughly 20 percent chance of spotty, seabreeze-driven storms late this afternoon into early evening. Any cell that does pop up could deliver a quick burst of heavy rain and some gusty winds before moving along. According to the National Weather Service Houston/Galveston, south winds around 5 to 10 mph are expected across the region, and heat index values may land near 102°F in many locations. Commuters and mariners should stay alert for brief reductions in visibility where localized downpours occur, but a widespread washout is not in the cards.
Weekend And Early-Week Heat
High pressure building over the Gulf this weekend will tighten Houston’s grip on the heat. Daytime highs are forecast to climb into the mid 90s, with a high near 94°F on Saturday and about 95°F on Sunday. By early next week, upper 90s are likely inland, and a few spots could flirt with triple digits. Overnight, the city will not cool off much, with lows likely locked in the upper 70s across most of the metro. Outdoor plans will be more comfortable in the morning or evening, and residents are urged to keep water and shade handy for children, outdoor workers and pets who have to spend time in the heat.
Stay Cool And Plan Ahead
For anyone who needs a break from the heat, city libraries and community centers can offer air-conditioned relief, and residents can call 3-1-1 for locations and hours. For more context on how this hot pattern has been building, check out our earlier coverage of Houston turning into a steam bath. Before locking in outdoor plans, keep an eye on the latest forecasts, and take a moment to check on neighbors who may be especially vulnerable to the heat.
