Dallas weather in September
Dallas in September averages 27°C (80°F) and 76 mm of rain.
Of the twelve months in Dallas, September is the fourth warmest and the sixth driest.
- Average temp
- 27°C (80°F)
21–32°C · 70–90°F
- Rainfall
- 76 mm
Showers likely
- Sunshine
- —
- Wind
- 13 km/h
What is Dallas 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 Dallas 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 76 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 Dallas is 4°C cooler than August and 21 mm wetter than it, which averages 31°C (87°F).
September in Dallas is 6.1°C warmer than October and 45 mm drier than it, which averages 21°C (69°F).
Daylight in Dallas in September
On 15 September the sun is up for 12 hours 21 minutes in Dallas, rising about 07:11 and setting about 19:32 local time.
September ends 58 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 57 minutes short of June, the longest-lit month here.
Where to stay in Dallas
Dates are a starting point for September.
Travel guides for Dallas
What to read before you book.
Dallas 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 | 9°C / 48°F | 64 mm |
| February | 11°C / 52°F | 70 mm |
| March | 15°C / 60°F | 88 mm |
| April | 20°C / 67°F | 80 mm |
| May | 24°C / 75°F | 116 mm |
| June | 28°C / 83°F | 97 mm |
| July | 31°C / 87°F | 45 mm |
| August | 31°C / 87°F | 56 mm |
| September | 27°C / 80°F | 76 mm |
| October | 21°C / 69°F | 122 mm |
| November | 14°C / 58°F | 75 mm |
| December | 10°C / 49°F | 79 mm |
Similar weather in September
Other destinations whose September averages sit close to this one.
Check another month
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FAQs about Dallas in September
September climate averages for Dallas, 1991–2020.
Dallas 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 76 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 21°C (69°F) in October — 6.1°C warmer.
September is 4°C cooler than August, and 21 mm wetter.
It is outside the easiest window. The most comfortable stretch here is April to July; 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 21 minutes of daylight in mid-September, against 14 hours 18 minutes in June and 10 hours in December.
On 15 September, sunrise is about 07:11 and sunset about 19:32 local time. Both shift across the month — the month ends 58 minutes shorter than it starts.
