Boerne weather in September: Boerne, Texas: normal highs, lows, rain and records for September
Boerne in September has a normal high of 89°F and a normal low of 65°F, a daily mean of 77°F, falling from 92°F on the 1st to 85°F by the 30th. Measurable precipitation falls on 7 days in a normal September, 3.90 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 31°C and low of 18°C, 99 mm of precipitation in September.
- NOAA stationBoerne
- Station IDUSC00410902
- Location29.80°N 98.74°W
- Elevation1,445 ft (440 m)
- Population22,712
- Jan 62° 37°
- Feb 66° 41°
- Mar 72° 47°
- Apr 79° 54°
- May 84° 63°
- Jun 90° 69°
- Jul 93° 71°
- Aug 94° 71°
- Sep 89° 65°
- Oct 81° 56°
- Nov 70° 45°
- Dec 63° 38°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Boerne in September?
The normal high is 89°F and the normal low 65°F, for a daily mean of 76.8°F. September is 5.5°F cooler than August and 8.8°F warmer than October. September is the 4th warmest month of the year in Boerne and the 2nd wettest. Across the month the normal high falls 7°F, from 92°F on September 1 to 85°F on September 30. From one year to the next September's mean temperature typically moves about 2.2°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 75°F and 79°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 23%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 92°F | 69°F | 21% | 16% |
| September 8 | 90°F | 67°F | 23% | 17% |
| September 15 | 89°F | 65°F | 23% | 17% |
| September 22 | 87°F | 63°F | 22% | 16% |
| September 30 | 85°F | 61°F | 21% | 15% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 92°F | 69°F | 21% | 16% | 12 h 50 min |
| September 2 | 92°F | 69°F | 22% | 16% | 12 h 50 min |
| September 3 | 91°F | 68°F | 22% | 16% | 12 h 40 min |
| September 4 | 91°F | 68°F | 22% | 16% | 12 h 40 min |
| September 5 | 91°F | 68°F | 22% | 17% | 12 h 40 min |
| September 6 | 91°F | 68°F | 23% | 17% | 12 h 40 min |
| September 7 | 91°F | 67°F | 23% | 17% | 12 h 40 min |
| September 8 | 90°F | 67°F | 23% | 17% | 12 h 40 min |
| September 9 | 90°F | 67°F | 23% | 17% | 12 h 30 min |
| September 10 | 90°F | 67°F | 23% | 17% | 12 h 30 min |
| September 11 | 90°F | 67°F | 23% | 17% | 12 h 30 min |
| September 12 | 89°F | 66°F | 23% | 17% | 12 h 30 min |
| September 13 | 89°F | 66°F | 23% | 17% | 12 h 30 min |
| September 14 | 89°F | 66°F | 23% | 17% | 12 h 20 min |
| September 15 | 89°F | 65°F | 23% | 17% | 12 h 20 min |
| September 16 | 88°F | 65°F | 23% | 16% | 12 h 20 min |
| September 17 | 88°F | 65°F | 23% | 16% | 12 h 20 min |
| September 18 | 88°F | 65°F | 23% | 16% | 12 h 20 min |
| September 19 | 88°F | 64°F | 23% | 16% | 12 h 20 min |
| September 20 | 87°F | 64°F | 22% | 16% | 12 h 10 min |
| September 21 | 87°F | 64°F | 22% | 16% | 12 h 10 min |
| September 22 | 87°F | 63°F | 22% | 16% | 12 h 10 min |
| September 23 | 87°F | 63°F | 22% | 16% | 12 h 10 min |
| September 24 | 87°F | 63°F | 22% | 15% | 12 h 10 min |
| September 25 | 86°F | 63°F | 22% | 15% | 12 h 10 min |
| September 26 | 86°F | 62°F | 21% | 15% | 12 h |
| September 27 | 86°F | 62°F | 21% | 15% | 12 h |
| September 28 | 86°F | 62°F | 21% | 15% | 12 h |
| September 29 | 85°F | 61°F | 21% | 15% | 12 h |
| September 30 | 85°F | 61°F | 21% | 15% | 12 h |
- Normal high
- 89°FSeptember average
- Normal low
- 65°FSeptember average
- Precipitation
- 3.90 inmonth total
- Days with precipitation
- 70.01 inch or more
- Days at 90°F or more
- 15
- Daylight
- 12 h 50 min to 12 hSeptember 1 to September 30
- Days at 70°F or more
- 30
- Days at 80°F or more
- 28
- Sunshine
- 81%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00410902; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Boerne in September?
On a given September day the chance of 0.01 inch or more is 22% on average, highest around September 11 (23%). In all, 3.90 in falls on 7 days of a normal September, 1 of them with an inch or more.
In a normal September in Boerne, 15 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00410902.
What are the records for September in Boerne?
The warmest September temperature on this station's record (since 1898) is 109°F, on September 6, 2000; the coldest is 35°F, on September 30, 1908. The wettest September brought 14.17 in (2018).
The September mean against the 1991-2020 normal of 76.8°F: 2021 77.1°F (+0.3), 2022 79.0°F (+2.2), 2023 83.7°F (+6.9), 2024 77.8°F (+1.0), 2025 78.0°F (+1.2), 2026 84.7°F (+7.9). 6 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 77.1°F | +0.3°F | 3.40 in |
| 2022 | 79.0°F | +2.2°F | 0.62 in |
| 2023 | 83.7°F | +6.9°F | 0.91 in |
| 2024 | 77.8°F | +1.0°F | 2.52 in |
| 2025 | 78.0°F | +1.2°F | 1.94 in |
| 2026 | 84.7°F | +7.9°F | 0.18 in |
Source: records: ACIS, station USC00410902; recent months: ACIS, station USC00410902. Records and recent months use complete months only.
How does September in Boerne compare across Texas?
Across the 321 places PlainClimate covers in Texas, September normal highs run from 81°F in Hart to 95°F in Presidio; Boerne's is 89°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.