Houston weather and trip planning

Houston sits on a flat, low Gulf Coast plain, a few feet above sea level and crossed by slow bayous, and its weather decides how a trip feels more than any museum or restaurant does. Summers are hot and heavy with humidity, winters are mild with the occasional sharp cold front, and storms can arrive from the Gulf with little warning. We plan every visit around those facts, and the effort pays back.

Summer heat and humidity

From June to September the air feels thick the moment you step outside, and the heat index regularly climbs well beyond what the thermometer says. Locals respond by living indoors in air conditioning and moving between buildings by car. We copy them: outdoor sightseeing goes in the morning, museums and long lunches fill the afternoon, and the evening is for patios once the sun drops. Light cotton, a hat and a refillable water bottle are essential, and sunscreen should be applied before leaving the hotel.

Downtown has a useful answer to the heat in its tunnel network, a web of air-conditioned passages beneath the streets that links office towers, food courts and shops. Our Downtown Houston guide explains how to find the entrances, and we remind visitors that the tunnels are mainly for workers, so they are quiet at weekends.

Hurricane season and flooding

The Atlantic hurricane season runs from June to November, with the peak in late summer. Houston remembers Tropical Storm Allison in 2001, Hurricane Ike in 2008 and Hurricane Harvey in 2017, which dropped rain over several days and flooded large parts of the metropolitan area. The city built its drainage around bayous such as Buffalo Bayou, and heavy rain can fill those channels quickly. When a warning is issued, locals take it seriously, and so should visitors.

We book accommodation with flexible cancellation for travel in late summer, and we follow the local forecast and any official evacuation advice. Never drive through standing water, especially under freeway underpasses, which flood first. Even a short storm can close roads for an hour or two.

The best seasons

Spring, from March into May, and autumn, from late October into November, are our favourite seasons. Temperatures are mild, parks are green, and outdoor events fill the calendar. Spring brings azaleas and the wildflowers along roadsides, and the livestock show and rodeo arrives in late winter. Walks along Buffalo Bayou Park are most pleasant in these months, when you can stay outside for hours without wilting.

Winter surprises

Winter days are often mild enough for a light jacket, yet fronts called northers can drop temperatures sharply in an afternoon. Hard freezes are rare but real, and the February 2021 winter storm showed how unprepared a Gulf Coast city can be for ice. Pack layers rather than one heavy coat, and expect indoor spaces to be well heated.

Packing and daily rhythm

Our packing list is short: breathable clothes, a compact umbrella, sturdy walking shoes for the bayou paths and a light layer for aggressive air conditioning, which can feel almost arctic in cinemas and galleries. Evening rain showers are common in summer, so we carry the umbrella even when the morning sky is clear.

Plan your time with the weather in mind. The Museum District is the natural refuge for a hot afternoon, with several major collections within walking distance of one another. Day trips need flexibility too: the beaches at Galveston are delightful on a calm day and uninviting when the surf is rough or the wind is strong, so we choose the day based on the forecast instead of the calendar.

Airport and rail disruption

Storms delay flights and slow the roads, so our airport guide recommends leaving generous margins on departure day. Rail lines usually keep running, but street flooding can interrupt both trains and buses, and we always carry a plan B for getting back to the hotel.