Houston in September
In September, Houston averages 31°C (87°F) during the day and 23°C (73°F) at night, with frequent rain — about 21 days of the month see precipitation (190 mm total).
Off-peakConditions are warm and beach-friendly. Expect daily rain or showers, often in heavy bursts.
It's peak hurricane season in Houston during September. Travel is possible but expect storm risk, possible flight disruption, and generally lower travel insurance coverage.
How September compares to the rest of the year in Houston
September is in the middle of the year for warmth in Houston (4th of 12) and moderately rainy compared to the rest of the year (5th of 12). Daytime temperature runs 5°C above the annual average (26°C). September runs 2°C cooler than August (33°C) and cools 4°C in October (27°C).
September sunrise & sunset in Houston
Times shown for Houston local time (America/Chicago), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Houston — September
Golden-hour and blue-hour windows for the 15th of September, in Houston's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Houston in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (Off-peak) and Houston's popularity.
Crowds & pricing — September in Houston
This is off-peak for Houston — the lowest prices of the year and the fewest crowds, but with real trade-offs: some restaurants, hotels, and beach businesses may close for the season; weather conditions can make outdoor activities unpredictable; and a handful of seasonal sights run reduced hours or close entirely. Great if you prefer a quiet local rhythm and don't mind the climate giving you reasons to choose indoor activities.
Why this tier: peak hazard season (1 active)
Sun & mosquito risk — September in Houston
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Houston in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 17°C / 63°F | 7°C / 45°F | 118 mm | 15 | — |
| February | 19°C / 66°F | 10°C / 49°F | 95 mm | 17 | — |
| March | 22°C / 72°F | 13°C / 56°F | 135 mm | 19 | — |
| April | 25°C / 78°F | 16°C / 61°F | 164 mm | 20 | — |
| May | 29°C / 84°F | 21°C / 69°F | 206 mm | 22 | — |
| June | 32°C / 89°F | 24°C / 74°F | 180 mm | 23 | — |
| July | 33°C / 91°F | 25°C / 76°F | 145 mm | 23 | — |
| August | 33°C / 92°F | 25°C / 77°F | 185 mm | 23 | — |
| September | 31°C / 87°F | 23°C / 73°F | 190 mm | 21 | — |
| October | 27°C / 80°F | 18°C / 64°F | 140 mm | 16 | — |
| November | 21°C / 70°F | 12°C / 54°F | 110 mm | 15 | — |
| December | 19°C / 66°F | 10°C / 50°F | 145 mm | 16 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Houston in September →
Frequently asked questions
How hot is Houston in September?
In September, Houston averages a high of 31°C (87°F) and a low of 23°C (73°F) — generally hot.
Does it rain a lot in Houston in September?
September is quite rainy in Houston, with about 21 rainy days on average.
Is September a good time to visit Houston?
September is hot but on the rainy side. It suits travelers who are comfortable with hot weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Houston in September?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full September packing list for Houston for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.