September is one of the warmer months of the year in Levittown, with average highs near 25.8°C and lows around 14.3°C (mean 20.1°C). It is about average for rainfall, averaging 103 mm of rainfall and 73% relative humidity across the period.
September is one of the warmer months of the year in Levittown. Across 45 years of records, the warmest September in Levittown was 2005 — when the month averaged 22.9°C — while the coldest was 1984 at 17°C. Typical September days reach 25.8°C with nights near 14.3°C. The long-term trend is warming, about 0.6°C per decade.
September is about average for rainfall in Levittown, averaging 103 mm of rainfall. The wettest September on record was 1999 with 241 mm, while the driest was 2019 at 19 mm.
Relative humidity in Levittown during September averages 73%. The most humid September was 2011 at 87%, and the least humid was 1983 at 62%.
September receives about 4.3 kWh/m²/day of solar energy in Levittown. The sunniest September was 2007 at 5 kWh/m²/day, and the cloudiest was 2018 at 3.3.
Average wind speed in Levittown during September is 1.6 m/s. The windiest Septembers were 1999 and 2010 at 1.9 m/s, while the calmest were 1982 and 2013 at 1.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.2°C | 19.4°C | 20.1°C | 20.9°C | 20.9°C | +1.7°C |
| Avg High | 25.3°C | 25.2°C | 25.8°C | 26.5°C | 26.5°C | +1.2°C |
| Avg Low | 13.2°C | 13.7°C | 14.3°C | 15.2°C | 15.4°C | +2.2°C |
| Avg Rain | 93 mm | 109 mm | 107 mm | 102 mm | 101 mm | +8 mm |
September temperatures in Levittown have risen by about 1.9°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 3.6°C (1991) to a record high of 36.9°C (2023).
Rainfall in September is about average for rainfall, averaging 103 mm, with a wettest year of 241 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.4°C per decade while lows rose 0.7°C per decade, narrowing the gap between day and night.
One of the best times to visit Levittown
September is one of the best times to visit Levittown. Expect days averaging 25.8°C and nights around 14.3°C (mean 20.1°C) — warmer than Levittown's yearly average — with higher rainfall (103 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 | 27.9°C | 21.9°C | 15.8°C | 32.7°C | 11.5°C | 65 mm | 70% | 1.6 m/s | 4.4 |
| 2024 | 26.7°C | 21.1°C | 15.5°C | 30.3°C | 9.7°C | 26 mm | 73% | 1.7 m/s | 4.2 |
| 2023 | 26.6°C | 21.3°C | 15.9°C | 36.9°C | 11.1°C | 159 mm | 76% | 1.7 m/s | 4.1 |
| 2022 | 26.8°C | 20.9°C | 15.0°C | 32.9°C | 6.3°C | 88 mm | 69% | 1.7 m/s | 4.5 |
| 2021 | 25.5°C | 20.6°C | 15.8°C | 30.2°C | 10.1°C | 173 mm | 81% | 1.7 m/s | 4.4 |
| 2020 | 25.3°C | 19.8°C | 14.3°C | 30.1°C | 5.2°C | 95 mm | 75% | 1.5 m/s | 4.3 |
| 2019 | 27.8°C | 21.7°C | 15.5°C | 32.5°C | 8.6°C | 19 mm | 70% | 1.5 m/s | 4.5 |
| 2018 | 25.7°C | 21.5°C | 17.3°C | 33.2°C | 10.6°C | 196 mm | 86% | 1.6 m/s | 3.3 |
| 2017 | 26.5°C | 20.8°C | 15.1°C | 32.9°C | 8.9°C | 58 mm | 73% | 1.6 m/s | 4.4 |
| 2016 | 28.1°C | 22.2°C | 16.2°C | 35.7°C | 9.1°C | 110 mm | 67% | 1.8 m/s | 4.3 |
| 2015 | 28.2°C | 22.1°C | 16.0°C | 35.0°C | 11.1°C | 99 mm | 71% | 1.6 m/s | 4.6 |
| 2014 | 26.0°C | 20.3°C | 14.6°C | 32.3°C | 7.4°C | 57 mm | 73% | 1.5 m/s | 4.4 |
| 2013 | 24.3°C | 18.1°C | 11.8°C | 31.9°C | 5.0°C | 52 mm | 74% | 1.4 m/s | 4.9 |
| 2012 | 25.2°C | 19.8°C | 14.4°C | 34.1°C | 7.3°C | 121 mm | 76% | 1.5 m/s | 4.3 |
| 2011 | 25.0°C | 20.5°C | 16.0°C | 28.4°C | 6.4°C | 194 mm | 87% | 1.5 m/s | 3.4 |
| 2010 | 28.4°C | 22.0°C | 15.5°C | 36.5°C | 9.1°C | 114 mm | 64% | 1.9 m/s | 4.5 |
| 2009 | 23.3°C | 18.4°C | 13.6°C | 28.0°C | 7.5°C | 111 mm | 81% | 1.6 m/s | 4.1 |
| 2008 | 26.4°C | 20.7°C | 15.1°C | 35.0°C | 9.1°C | 151 mm | 74% | 1.6 m/s | 4.3 |
| 2007 | 28.1°C | 21.6°C | 15.0°C | 33.3°C | 7.9°C | 21 mm | 67% | 1.5 m/s | 5 |
| 2006 | 23.4°C | 18.5°C | 13.6°C | 28.4°C | 7.7°C | 149 mm | 81% | 1.7 m/s | 3.9 |
| 2005 🔥 | 29.7°C | 22.9°C | 16.0°C | 34.6°C | 7.2°C | 26 mm | 62% | 1.6 m/s | 4.9 |
| 2004 | 26.1°C | 20.6°C | 15.2°C | 30.0°C | 7.6°C | 147 mm | 79% | 1.6 m/s | 4 |
| 2003 | 24.3°C | 19.6°C | 14.9°C | 27.2°C | 6.5°C | 162 mm | 84% | 1.8 m/s | 3.9 |
| 2002 | 27.4°C | 21.1°C | 14.9°C | 33.8°C | 10.3°C | 94 mm | 68% | 1.7 m/s | 4.7 |
| 2001 | 25.9°C | 19.4°C | 12.8°C | 31.1°C | 6.4°C | 67 mm | 67% | 1.6 m/s | 4.6 |
| 2000 | 23.8°C | 18.1°C | 12.3°C | 29.9°C | 4.7°C | 139 mm | 77% | 1.6 m/s | 4.3 |
| 1999 🌧️ | 24.8°C | 19.6°C | 14.4°C | 30.5°C | 5.7°C | 241 mm | 79% | 1.9 m/s | 4.1 |
| 1998 | 28.0°C | 21.5°C | 14.9°C | 33.7°C | 6.0°C | 48 mm | 66% | 1.7 m/s | 4.4 |
| 1997 | 25.0°C | 19.0°C | 13.1°C | 30.6°C | 5.1°C | 54 mm | 70% | 1.8 m/s | 4.4 |
| 1996 | 24.2°C | 19.3°C | 14.3°C | 30.2°C | 7.9°C | 145 mm | 81% | 1.7 m/s | 3.8 |
| 1995 | 25.9°C | 19.7°C | 13.4°C | 32.9°C | 6.8°C | 111 mm | 65% | 1.6 m/s | 4.3 |
| 1994 | 24.2°C | 18.3°C | 12.4°C | 30.0°C | 7.3°C | 71 mm | 73% | 1.7 m/s | 4.3 |
| 1993 | 24.7°C | 19.5°C | 14.4°C | 32.9°C | 4.3°C | 158 mm | 76% | 1.7 m/s | 3.4 |
| 1992 | 24.6°C | 19.2°C | 13.8°C | 30.6°C | 3.8°C | 103 mm | 74% | 1.8 m/s | 3.9 |
| 1991 | 25.5°C | 19.5°C | 13.6°C | 34.2°C | 3.6°C | 100 mm | 67% | 1.7 m/s | 4.5 |
| 1990 | 24.7°C | 18.7°C | 12.7°C | 32.5°C | 4.0°C | 55 mm | 73% | 1.6 m/s | 4.3 |
| 1989 | 24.1°C | 19.0°C | 13.9°C | 31.7°C | 3.7°C | 173 mm | 81% | 1.7 m/s | 4 |
| 1988 | 24.9°C | 18.5°C | 12.2°C | 30.1°C | 6.5°C | 70 mm | 71% | 1.5 m/s | 4.5 |
| 1987 | 24.6°C | 19.2°C | 13.9°C | 28.3°C | 6.9°C | 114 mm | 80% | 1.5 m/s | 4.2 |
| 1986 | 25.8°C | 19.7°C | 13.5°C | 31.6°C | 4.7°C | 63 mm | 70% | 1.6 m/s | 4.1 |
| 1985 | 26.8°C | 20.5°C | 14.2°C | 34.2°C | 6.6°C | 139 mm | 67% | 1.6 m/s | 4.6 |
| 1984 ❄️ | 23.0°C | 17.0°C | 11.0°C | 29.5°C | 5.2°C | 60 mm | 76% | 1.5 m/s | 4.9 |
| 1983 | 27.4°C | 20.6°C | 13.7°C | 36.7°C | 5.0°C | 78 mm | 62% | 1.6 m/s | — |
| 1982 | 25.9°C | 19.6°C | 13.3°C | 31.5°C | 8.3°C | 59 mm | 69% | 1.4 m/s | — |
| 1981 | 25.1°C | 19.0°C | 12.9°C | 32.7°C | 4.9°C | 83 mm | 69% | 1.7 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 25.8°C with lows near 14.3°C (mean 20.1°C), based on 45 years of NASA POWER data.
September averages 103 mm of rainfall in Levittown, about average for rainfall. The wettest on record was 241 mm in 1999.
The hottest September reached 36.9°C in 2023. The coldest dipped to 3.6°C in 1991.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.9°C. Daytime highs moved from 25.6°C to 26.7°C and overnight lows from 13°C to 15.6°C over the same span.
September is one of the warmer months of the year in Levittown and about average for rainfall, so plan for around 25.8°C daytime highs and 14.3°C at night.
Not quite — September is the 9th coolest month in Levittown, averaging 20.1°C.
For September in Levittown, pack light layers you can adjust through the day, with typical highs of 25.8°C and lows of 14.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 73% — moderately humid.
Average wind speed in September is 1.6 m/s. The windiest September on record averaged 1.9 m/s (1999).
The wettest September on record was 1999 with 241 mm. On average, September sees 103 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 Levittown 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.
