Killeen, TX weather in September
Killeen is hot and often humid in September, with some rain: highs average 90°F and nights drop to about 67°F. Rain falls on about 6 days.
- Normal high
- 90°F
- Normal low
- 67°F
- Wet days
- 6
- 3.7 in total
- Muggy days
- 16
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 94°F | 85°F |
| Normal low | 71°F | 62°F |
| Chance of a wet day | 20% | 21% |
| Sunrise / sunset | 7:07 am / 7:54 pm | 7:24 am / 7:17 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 am70°Fdew point 64°F
- 9 am77°Fdew point 65°F
- Noon85°Fdew point 63°F
- 3 pm88°Fdew point 61°F
- 6 pm85°Fdew point 61°F
- 9 pm77°Fdew point 62°F
NOAA hourly normals (local standard time) from Robert Gray AAF (7 mi away); average wind 8 mph; clear or few clouds in 46% of daytime hours, mostly cloudy or overcast in 36%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F2 of 30
- Hot dayshigh 90°F or more17 of 30
- Muggy daysdaily mean dew point 65°F or more16 of 30
- Wet daysat least 0.01 in of rain or melted snow6 of 30
- Notable rainat least 0.10 in4 of 30
- Freezing nightslow 32°F or below0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 3.7 in; a dry September brings about 1.1 in and a wet one about 4.8 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 97°F
- Coolest September1991: average high 83°F
- Wettest September2010: 11.9 in
- Driest September1994: 0.3 in
- Highest reading112°F (September 6, 2000)
- Lowest reading41°F (September 21, 1994)
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 | 97°F | 90°F | 80°F |
| Normal low | 73°F | 67°F | 56°F |
| Wet days | 5 | 6 | 7 |
| Comfortable days | 0 | 2 | 9 |
| Daylight | 13.3 h | 12.3 h | 11.4 h |
Highs change by -7°F from August and -10°F into October.
How Killeen ranks in September
- Normal high59th warmest of 378 cities; 18th of 38 in Texas
- Wet days121st driest of 378
- Comfortable days271st most of 342
What to pack for Killeen in September
- Light, breathable clothing – highs near 90°F and about 16 muggy days
Heating and cooling
September has 5 heating degree days and 400 cooling degree days (base 65°F), 9% of the year's total heating and cooling demand.
Questions
How hot is Killeen in September?
The normal high is 90°F and the normal low is 67°F. From 1991 to 2020 the hottest September reading was 112°F (most recently on September 6, 2000).
Does it rain a lot in Killeen in September?
About 6 days in September have at least 0.01 in of precipitation, and the normal total is 3.7 in. The wettest September in 1991-2020 was in 2010 (11.9 in); the driest was in 1994 (0.3 in).
Is September a good time to visit Killeen?
September ranks 9th of 12 months on our comfort score for Killeen (41 out of 100). It has about 2 comfortable days and about 17 days at 90°F or hotter. The best months are February, March and April.
Where the numbers come from
- Temperature, snowfall, snow depth and frost dates: Killeen (USC00414792), 4.1 mi SSE of the city center, 815 ft . NOAA normals and daily records, 1991-2020.
- Rain: Stillhouse Hollow Dam (USC00418646), 13 mi ESE of the city center, 706 ft (116 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Robert Gray AAF (USW00003902), 7.2 mi WSW of the city center, 1,015 ft (193 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Robert Gray Aff Airport (722576-03902), 7.1 mi WSW of the city center, 1,015 ft (193 ft higher than the city). Hourly observations, 1991-2020.