Grand Prairie, TX weather in September
Expect hot, often humid, mostly dry weather in Grand Prairie in September, with highs near 89°F and lows near 69°F. Rain falls on about 5 days.
- Normal high
- 89°F
- Normal low
- 69°F
- Wet days
- 5
- 2.7 in total
- Muggy days
- 14
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 93°F | 84°F |
| Normal low | 73°F | 63°F |
| Chance of a wet day | 19% | 17% |
| Sunrise / sunset | 7:02 am / 7:53 pm | 7:21 am / 7:14 pm |
| Daylight | 12.8 h | 11.9 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Central Time).
A typical September day
- 6 am71°Fdew point 64°F
- 9 am77°Fdew point 65°F
- Noon85°Fdew point 63°F
- 3 pm87°Fdew point 61°F
- 6 pm85°Fdew point 61°F
- 9 pm78°Fdew point 62°F
NOAA hourly normals (local standard time) from Dallas Ft Worth Airport (11 mi away); average wind 9 mph; clear or few clouds in 39% of daytime hours, mostly cloudy or overcast in 37%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F2 of 30
- Hot dayshigh 90°F or more16 of 30
- Muggy daysdaily mean dew point 65°F or more14 of 30
- Wet daysat least 0.01 in of rain or melted snow5 of 30
- Notable rainat least 0.10 in4 of 30
- Freezing nightslow 32°F or below0 of 30
- Snow on the groundsnow depth 1 in or more0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 2.7 in; a dry September brings about 1.0 in and a wet one about 3.6 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How September varies from year to year
- Warmest September, 1991-20202019: average high 95°F
- Coolest September2001: average high 84°F
- Wettest September2018: 12.7 in
- Driest September2019: no measurable precipitation
- Highest reading111°F (September 4, 2000)
- Lowest reading44°F (September 28, 1996)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 96°F | 89°F | 78°F |
| Normal low | 76°F | 69°F | 57°F |
| Wet days | 5 | 5 | 7 |
| Comfortable days | 0 | 2 | 11 |
| Daylight | 13.3 h | 12.4 h | 11.4 h |
Highs change by -7°F from August and -11°F into October.
How Grand Prairie ranks in September
- Normal high85th warmest of 378 cities; 26th of 38 in Texas
- Wet days85th driest of 378
- Comfortable days262nd most of 342
What to pack for Grand Prairie in September
- Light, breathable clothing – highs near 89°F and about 14 muggy days
Heating and cooling
September has 3 heating degree days and 410 cooling degree days (base 65°F), 8% of the year's total heating and cooling demand.
Questions
How hot is Grand Prairie in September?
The normal high is 89°F and the normal low is 69°F. From 1991 to 2020 the hottest September reading was 111°F (September 4, 2000).
Does it rain a lot in Grand Prairie in September?
About 5 days in September have at least 0.01 in of precipitation, and the normal total is 2.7 in. The wettest September in 1991-2020 was in 2018 (12.7 in); the driest was in 2019, with no measurable precipitation.
Is September a good time to visit Grand Prairie?
September ranks 9th of 12 months on our comfort score for Grand Prairie (42 out of 100). It has about 2 comfortable days and about 16 days at 90°F or hotter. The best months are March and April.
Where the numbers come from
- Temperature, rain, snowfall, humidity and wind by hour and cloud cover: Dallas Ft Worth Airport (USW00003927), 11 mi N of the city center, 560 ft . NOAA normals and daily records, 1991-2020.
- Snow depth and frost dates: Dallas Love Fld (USW00013960), 11 mi NE of the city center, 440 ft (79 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Dallas/Ft Worth International Airport (722590-03927), 11 mi N of the city center, 544 ft . Hourly observations, 1991-2020.