September is one of the warmer months of the year in Pflugerville, with average highs near 33°C and lows around 20.8°C (mean 26.9°C). It is about average for rainfall, averaging 74 mm of rainfall and 64% relative humidity across the period.
September is one of the warmer months of the year in Pflugerville. Across 45 years of records, the warmest September in Pflugerville was 2019 — when the month averaged 30.8°C — while the coldest was 1991 at 24.4°C. Typical September days reach 33°C with nights near 20.8°C. The long-term trend is warming, about 0.5°C per decade.
September is about average for rainfall in Pflugerville, averaging 74 mm of rainfall. The wettest September on record was 2018 with 215 mm, while the driest was 1999 at 10 mm.
Relative humidity in Pflugerville during September averages 64%. The most humid September was 2018 at 81%, and the least humid was 2011 at 40%.
September receives about 5.3 kWh/m²/day of solar energy in Pflugerville. The sunniest September was 2011 at 6.1 kWh/m²/day, and the cloudiest was 2009 at 4.1.
Average wind speed in Pflugerville during September is 2.4 m/s. The windiest September was 1984 at 3.3 m/s, while the calmest were 2007 and 2022 at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 26.4°C | 26.6°C | 26.4°C | 27.5°C | 28.2°C | +1.8°C |
| Avg High | 32.7°C | 32.7°C | 32.3°C | 33.3°C | 34.7°C | +2°C |
| Avg Low | 20.1°C | 20.6°C | 20.5°C | 21.6°C | 21.6°C | +1.5°C |
| Avg Rain | 68 mm | 74 mm | 68 mm | 97 mm | 56 mm | -11 mm |
September temperatures in Pflugerville have risen by about 2.6°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 7.6°C (1983) to a record high of 44.9°C (2000).
Rainfall in September is about average for rainfall, averaging 74 mm, with a wettest year of 215 mm.
One of the best times to visit Pflugerville
September is one of the best times to visit Pflugerville. Expect days averaging 33°C and nights around 20.8°C (mean 26.9°C) — warmer than Pflugerville's yearly average — with moderate rainfall (74 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 35.9°C | 28.7°C | 21.6°C | 40.3°C | 16.4°C | 19 mm | 52% | 2 m/s | 5.7 |
| 2024 | 35.5°C | 28.6°C | 21.6°C | 39.1°C | 15.2°C | 35 mm | 58% | 2.5 m/s | 5.6 |
| 2023 | 37.4°C | 30.7°C | 24.1°C | 43.7°C | 19.9°C | 50 mm | 56% | 2.3 m/s | 5.6 |
| 2022 | 34.8°C | 28.1°C | 21.4°C | 38.4°C | 15.6°C | 27 mm | 59% | 1.8 m/s | 6 |
| 2021 | 34.8°C | 28.1°C | 21.3°C | 39.4°C | 14.8°C | 60 mm | 57% | 2.2 m/s | 5.8 |
| 2020 | 29.7°C | 24.8°C | 19.8°C | 34.8°C | 11.1°C | 145 mm | 75% | 2.9 m/s | 4.4 |
| 2019 🔥 | 37.4°C | 30.8°C | 24.2°C | 40.0°C | 22.3°C | 24 mm | 58% | 2.7 m/s | 5.7 |
| 2018 🌧️ | 30.1°C | 26.0°C | 21.8°C | 38.3°C | 16.0°C | 215 mm | 81% | 2 m/s | 4.3 |
| 2017 | 32.0°C | 25.9°C | 19.8°C | 35.2°C | 13.4°C | 60 mm | 70% | 2.3 m/s | 5.5 |
| 2016 | 31.7°C | 26.7°C | 21.7°C | 36.0°C | 13.1°C | 62 mm | 75% | 2 m/s | 5.5 |
| 2015 | 35.1°C | 28.7°C | 22.3°C | 39.4°C | 17.1°C | 22 mm | 58% | 2.3 m/s | 5.6 |
| 2014 | 32.1°C | 26.7°C | 21.3°C | 38.2°C | 14.0°C | 119 mm | 71% | 2.2 m/s | 5 |
| 2013 | 33.5°C | 27.7°C | 21.9°C | 38.6°C | 14.4°C | 126 mm | 65% | 2.1 m/s | 5.3 |
| 2012 | 33.0°C | 26.6°C | 20.1°C | 40.5°C | 15.6°C | 116 mm | 63% | 2.5 m/s | 5.4 |
| 2011 | 36.9°C | 29.2°C | 21.5°C | 41.0°C | 16.0°C | 12 mm | 40% | 2.8 m/s | 6.1 |
| 2010 | 31.4°C | 26.3°C | 21.1°C | 37.7°C | 11.3°C | 210 mm | 75% | 2.4 m/s | 5.2 |
| 2009 | 29.6°C | 25.0°C | 20.4°C | 37.4°C | 14.6°C | 183 mm | 76% | 2.2 m/s | 4.1 |
| 2008 | 33.3°C | 26.5°C | 19.6°C | 38.0°C | 14.8°C | 11 mm | 57% | 2.5 m/s | 5.6 |
| 2007 | 30.5°C | 25.8°C | 21.0°C | 32.6°C | 18.6°C | 61 mm | 79% | 1.8 m/s | 5.2 |
| 2006 | 32.8°C | 26.5°C | 20.1°C | 38.3°C | 13.9°C | 70 mm | 63% | 2.5 m/s | 5.2 |
| 2005 | 36.0°C | 29.5°C | 23.1°C | 42.4°C | 19.6°C | 27 mm | 59% | 2.4 m/s | 5.4 |
| 2004 | 33.3°C | 27.0°C | 20.6°C | 36.7°C | 15.7°C | 27 mm | 62% | 2.2 m/s | 5.2 |
| 2003 | 31.3°C | 25.4°C | 19.6°C | 36.8°C | 13.3°C | 87 mm | 68% | 2.2 m/s | 5 |
| 2002 | 32.3°C | 26.3°C | 20.4°C | 37.6°C | 13.5°C | 85 mm | 66% | 2.6 m/s | 5 |
| 2001 | 29.6°C | 24.5°C | 19.4°C | 33.3°C | 10.2°C | 75 mm | 76% | 2.2 m/s | 5.4 |
| 2000 | 34.6°C | 27.6°C | 20.6°C | 44.9°C | 8.7°C | 51 mm | 52% | 2.6 m/s | 5.6 |
| 1999 | 35.3°C | 28.2°C | 21.1°C | 40.1°C | 11.5°C | 10 mm | 47% | 2.9 m/s | 6 |
| 1998 | 33.4°C | 28.1°C | 22.9°C | 39.6°C | 20.5°C | 116 mm | 71% | 2.4 m/s | 4.8 |
| 1997 | 35.4°C | 28.6°C | 21.9°C | 39.3°C | 15.5°C | 34 mm | 58% | 2.5 m/s | 5.6 |
| 1996 | 29.8°C | 24.8°C | 19.7°C | 33.1°C | 9.4°C | 130 mm | 75% | 1.9 m/s | 5.1 |
| 1995 | 33.4°C | 27.0°C | 20.5°C | 39.5°C | 8.7°C | 73 mm | 65% | 2.3 m/s | 5.2 |
| 1994 | 31.5°C | 25.0°C | 18.6°C | 36.7°C | 8.9°C | 68 mm | 65% | 2.4 m/s | 5.4 |
| 1993 | 33.7°C | 26.8°C | 20.0°C | 38.3°C | 12.5°C | 65 mm | 57% | 2.6 m/s | 5.4 |
| 1992 | 33.2°C | 27.0°C | 20.8°C | 38.0°C | 10.5°C | 49 mm | 64% | 2.9 m/s | 5.6 |
| 1991 ❄️ | 29.6°C | 24.4°C | 19.2°C | 33.7°C | 10.9°C | 105 mm | 74% | 2.2 m/s | 4.7 |
| 1990 | 32.0°C | 26.5°C | 21.1°C | 37.2°C | 12.6°C | 85 mm | 69% | 1.9 m/s | 4.8 |
| 1989 | 33.2°C | 26.0°C | 18.8°C | 40.0°C | 9.7°C | 18 mm | 53% | 2.6 m/s | 5.7 |
| 1988 | 35.0°C | 28.2°C | 21.3°C | 38.3°C | 14.9°C | 56 mm | 55% | 2.9 m/s | 5.1 |
| 1987 | 32.0°C | 25.8°C | 19.6°C | 36.5°C | 13.1°C | 84 mm | 67% | 2.4 m/s | 5.3 |
| 1986 | 31.1°C | 26.6°C | 22.2°C | 34.0°C | 19.7°C | 131 mm | 79% | 2.9 m/s | 4.7 |
| 1985 | 32.8°C | 26.7°C | 20.5°C | 40.7°C | 8.0°C | 107 mm | 63% | 3.1 m/s | 5 |
| 1984 | 32.4°C | 25.9°C | 19.4°C | 37.6°C | 7.9°C | 31 mm | 58% | 3.3 m/s | 5 |
| 1983 | 32.4°C | 26.0°C | 19.6°C | 37.9°C | 7.6°C | 63 mm | 66% | 2.9 m/s | — |
| 1982 | 34.0°C | 27.3°C | 20.5°C | 38.4°C | 11.3°C | 48 mm | 59% | 2.4 m/s | — |
| 1981 | 31.2°C | 25.3°C | 19.3°C | 34.6°C | 10.0°C | 69 mm | 69% | 2.3 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 33°C with lows near 20.8°C (mean 26.9°C), based on 45 years of NASA POWER data.
September averages 74 mm of rainfall in Pflugerville, about average for rainfall. The wettest on record was 215 mm in 2018.
The hottest September reached 44.9°C in 2000. The coldest dipped to 7.6°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 2.6°C. Daytime highs moved from 32.6°C to 35.7°C and overnight lows from 19.9°C to 22°C over the same span.
September is one of the warmer months of the year in Pflugerville and about average for rainfall, so plan for around 33°C daytime highs and 20.8°C at night.
Not quite — September is the 9th coolest month in Pflugerville, averaging 26.9°C.
For September in Pflugerville, pack light, breathable clothing and sun protection, with typical highs of 33°C and lows of 20.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 64% — moderately humid.
Average wind speed in September is 2.4 m/s. The windiest September on record averaged 3.3 m/s (1984).
The wettest September on record was 2018 with 215 mm. On average, September sees 74 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Pflugerville behaves each September, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for September specifically, along with year-by-year records and how the month has changed over the decades.
