Weather
Houston, TX Rain Alert: 30% Storm Chance Halloween Oct 31
Houston, TX – A mostly sunny stretch across Southeast Texas will give way to a slight chance of thunderstorms Wednesday, Oct. 28, as Houston approaches the final days of October with temperatures hold
By Tessa Morgan · 2026-10-25T09:18:21.224Z
Houston, TX – A mostly sunny stretch across Southeast Texas will give way to a slight chance of thunderstorms Wednesday, Oct. 28, as Houston approaches the final days of October with temperatures holding in the lower 80s. The first opportunity for precipitation arrives Wednesday afternoon, when thunderstorms could develop after 1 p.m. Another chance of showers and thunderstorms appears in the Halloween forecast Saturday, Oct. 31, potentially affecting outdoor plans across the Houston area as residents prepare for the weekend.
According to the National Weather Service Houston/Galveston forecast, Wednesday will bring a 20% chance of showers and thunderstorms after 1 p.m., with mostly sunny skies and an afternoon high near 83 degrees. The relatively limited precipitation probability suggests many locations could remain dry, although isolated storms may briefly interrupt afternoon activities. Temperatures are expected to fall to approximately 67 degrees Wednesday night under partly cloudy skies.
Wednesday Brings Houston's First Storm Opportunity The approaching midweek precipitation chance follows several days of relatively quiet weather across the Houston metropolitan area. Sunday, Oct. 25, is expected to reach 81 degrees with mostly sunny skies, while Monday brings similar conditions and a high near 82. Tuesday continues the pattern with mostly cloudy skies and temperatures around 81 degrees before the atmosphere becomes somewhat more favorable for isolated showers Wednesday afternoon.
The broader National Weather Service outlook also identifies an evolving weather pattern across the central United States early in the week. A low pressure system and associated frontal boundaries are expected to produce rain and thunderstorms across portions of the Plains. However, the supplied Houston forecast does not establish a direct connection between those regional developments and Wednesday's isolated storm chance, nor does it identify a severe weather threat for the city.
Warm Temperatures Continue Across Southeast Texas Despite the possibility of rain, Houston will experience relatively consistent temperatures throughout the week. Afternoon highs are expected to range from approximately 80 to 83 degrees through Friday, with nighttime temperatures generally remaining in the 60s. This limited temperature variation suggests residents will experience familiar warm afternoons rather than a dramatic autumn cooldown.
For commuters traveling Interstate 10, Interstate 45, Interstate 69 and the Sam Houston Tollway, Wednesday's isolated thunderstorms could produce brief periods of wet pavement if showers develop along those routes. Reduced visibility is possible during heavier rainfall, but no specific highway closures, traffic delays or flooding impacts are indicated in the supplied forecast.
Thursday, Oct. 29, should bring a return to mostly sunny conditions with a high near 82 degrees. Mostly cloudy skies are expected Thursday night as temperatures fall to approximately 66 degrees. Friday continues the relatively quiet pattern, with partly sunny skies and an afternoon high near 80 degrees before temperatures settle around 68 degrees Friday night.
Halloween Weekend Brings Another Rain Chance Saturday, Oct. 31, introduces another opportunity for unsettled weather, with the National Weather Service projecting a 30% chance of showers and thunderstorms. Despite the rain possibility, the forecast calls for mostly sunny skies and an afternoon high near 84 degrees, potentially making Halloween one of the warmest days of the week.
The forecast does not specify when Saturday's thunderstorms might develop, leaving uncertainty about whether precipitation could interfere with evening trick or treating, festivals or other outdoor celebrations. Families and event organizers should review updated forecasts closer to Halloween before making weather dependent decisions.
The primary concern heading into the weekend is the timing and location of any isolated storms rather than a confirmed widespread hazardous weather event. Neither Wednesday's 20% probability nor Saturday's 30% probability guarantees rainfall at a particular address.
Will the possibility of Halloween thunderstorms change your outdoor plans around Houston this weekend?
Five Day Houston Weather Outlook Sunday 10/25: Mostly sunny skies will bring an afternoon high near 81 degrees, with east winds of 5 to 10 mph. Mostly cloudy conditions are expected Sunday night as temperatures fall to approximately 64 degrees.
Monday 10/26: Mostly sunny weather continues with a high near 82 degrees and light east winds around 5 mph. Temperatures will settle near 66 degrees Monday night beneath mostly cloudy skies, with southeast winds around 5 mph.
Tuesday 10/27: Mostly cloudy skies are expected throughout the day, with afternoon temperatures reaching approximately 81 degrees. Conditions remain mostly cloudy Tuesday night, with temperatures falling to around 68 degrees ahead of Wednesday's slight thunderstorm chance.
Wednesday 10/28: Mostly sunny skies will accompany a high near 83 degrees, with a 20% chance of showers and thunderstorms developing after 1 p.m. Partly cloudy conditions are expected Wednesday night, with a low around 67 degrees.
Thursday 10/29: Mostly sunny conditions return with an afternoon high near 82 degrees, offering a generally favorable period for outdoor activities. Mostly cloudy skies develop Thursday night as temperatures decline to approximately 66 degrees.
Extended Outlook: Friday, Oct. 30, Through Saturday, Oct. 31 Friday 10/30: Partly sunny skies are expected with an afternoon high near 80 degrees. Friday night will be partly cloudy, with temperatures falling to approximately 68 degrees.
Saturday 10/31: Halloween brings a 30% chance of showers and thunderstorms, although mostly sunny skies are expected overall. Temperatures could reach approximately 84 degrees, with the timing of any storms still uncertain.