Houston weather in September
Houston in September averages 27°C (80°F) and 110 mm of rain.
Of the twelve months in Houston, September is the fourth warmest and the fifth wettest.
- Average temp
- 27°C (80°F)
21–32°C · 70–90°F
- Rainfall
- 110 mm
Showers likely
- Sunshine
- —
- Wind
- 10 km/h
What is Houston like in September?
Daytime
Days are hot, often above 32°C.
Rain
Some rain is likely; pack for showers.
Evening
Evenings stay warm.
What should I pack for Houston in September?
High-factor sun cream
With daytime highs around 32°C, burn time is short even in shade.
Sunglasses and a brimmed hat
Midday glare is the part people underpack for, not the heat itself.
Loose cotton or linen
Synthetics stop working once you are sweating through them all day.
A refillable water bottle
Daily highs this warm need roughly double the water a temperate day does.
A light rain jacket
About 110 mm falls this month — showers rather than washouts.
A layer for the evening
The day swings about 11°C between its low and its high.
September compared with August and October
September in Houston is 2.6°C cooler than August and 12 mm drier than it, which averages 29°C (85°F).
September in Houston is 4.8°C warmer than October and 29 mm drier than it, which averages 22°C (72°F).
Daylight in Houston in September
On 15 September the sun is up for 12 hours 20 minutes in Houston, rising about 07:06 and setting about 19:25 local time.
September ends 51 minutes shorter than it begins, so the last week of the month is a different length of day from the first.
That is 1 hour 43 minutes short of June, the longest-lit month here.
Where to stay in Houston
Dates are a starting point for September.
Travel guides for Houston
What to read before you book.
Houston weather by month
TemperatureRainfall
How September compares with the rest of the year
September is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | 12°C / 53°F | 96 mm |
| February | 14°C / 57°F | 74 mm |
| March | 18°C / 64°F | 89 mm |
| April | 21°C / 70°F | 101 mm |
| May | 25°C / 77°F | 130 mm |
| June | 28°C / 83°F | 151 mm |
| July | 29°C / 85°F | 94 mm |
| August | 29°C / 85°F | 122 mm |
| September | 27°C / 80°F | 110 mm |
| October | 22°C / 72°F | 139 mm |
| November | 17°C / 62°F | 98 mm |
| December | 13°C / 55°F | 103 mm |
Similar weather in September
Other destinations whose September averages sit close to this one.
Check another month
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FAQs about Houston in September
September climate averages for Houston, 1991–2020.
Houston averages 27°C (80°F) in September, ranging from about 21°C (70°F) at night to 32°C (90°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Some. About 110 mm falls across September, enough to need a light jacket but not enough to reshape a trip.
Yes. September averages 27°C (80°F) against 22°C (72°F) in October — 4.8°C warmer.
September is 2.6°C cooler than August, and 12 mm drier.
It is outside the easiest window. The most comfortable stretch here is March to June; September sits outside it, which usually means more heat, more rain, or both — worth it if you would rather have the place to yourself.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what September is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 12 hours 20 minutes of daylight in mid-September, against 14 hours 3 minutes in June and 10 hours 15 minutes in December.
On 15 September, sunrise is about 07:06 and sunset about 19:25 local time. Both shift across the month — the month ends 51 minutes shorter than it starts.
