New Braunfels, TX weather in September
Expect hot, humid, mostly dry weather in New Braunfels in September, with highs near 92°F and lows near 68°F. Rain falls on about 6 days. Plan outdoor time for mornings and evenings.
- Normal high
- 92°F
- Normal low
- 68°F
- Wet days
- 6
- 3.5 in total
- Muggy days
- 20
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 95°F | 88°F |
| Normal low | 71°F | 64°F |
| Chance of a wet day | 20% | 17% |
| Sunrise / sunset | 7:09 am / 7:55 pm | 7:25 am / 7:19 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 am72°Fdew point 67°F
- 9 am78°Fdew point 68°F
- Noon86°Fdew point 65°F
- 3 pm89°Fdew point 64°F
- 6 pm86°Fdew point 63°F
- 9 pm79°Fdew point 65°F
NOAA hourly normals (local standard time) from San Antonio Intl Airport (24 mi away); average wind 7 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F1 of 30
- Hot dayshigh 90°F or more21 of 30
- Muggy daysdaily mean dew point 65°F or more20 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 3.5 in; a dry September brings about 1.5 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 98°F
- Coolest September2003: average high 86°F
- Wettest September2010: 7.5 in
- Driest September1999: no measurable precipitation
- Highest reading112°F (September 5, 2000)
- Lowest reading45°F (September 26, 2000)
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 | 98°F | 92°F | 84°F |
| Normal low | 73°F | 68°F | 59°F |
| Wet days | 5 | 6 | 5 |
| Comfortable days | 0 | 1 | 6 |
| Daylight | 13.2 h | 12.3 h | 11.4 h |
Highs change by -6°F from August and -8°F into October.
How New Braunfels ranks in September
- Normal high25th warmest of 378 cities; 5th of 38 in Texas
- Wet days97th driest of 378
- Comfortable days300th most of 342
What to pack for New Braunfels in September
- Light, breathable clothing – highs near 92°F and about 20 muggy days
Heating and cooling
September has 1 heating degree days and 446 cooling degree days (base 65°F), 10% of the year's total heating and cooling demand.
Questions
How hot is New Braunfels in September?
The normal high is 92°F and the normal low is 68°F. From 1991 to 2020 the hottest September reading was 112°F (September 5, 2000).
Does it rain a lot in New Braunfels in September?
About 6 days in September have at least 0.01 in of precipitation, and the normal total is 3.5 in. The wettest September in 1991-2020 was in 2010 (7.5 in); the driest was in 1999, with no measurable precipitation.
Is September a good time to visit New Braunfels?
September ranks 10th of 12 months on our comfort score for New Braunfels (37 out of 100). It has about 1 comfortable day and about 21 days at 90°F or hotter. The best months are February, March and November.
Where the numbers come from
- Temperature and frost dates: Austin San Antonio (USW00012971), 5.8 mi E of the city center, 633 ft . NOAA normals and daily records, 1991-2020.
- Rain, snowfall and snow depth: New Braunfels (USC00416276), 3.8 mi SW of the city center, 720 ft (90 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: San Antonio Intl Airport (USW00012921), 24 mi WSW of the city center, 789 ft (159 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: New Braunfels Municipal Airport (722416-12971), 4.7 mi E of the city center, 648 ft . Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).