September is one of the warmer months of the year in Crossville, with average highs near 27.2°C and lows around 14.2°C (mean 20.7°C). It is one of the drier months, averaging 96 mm of rainfall and 71% relative humidity across the period.
September is one of the warmer months of the year in Crossville. Across 45 years of records, the warmest September in Crossville was 2019 — when the month averaged 25°C — while the coldest was 1982 at 18.6°C. Typical September days reach 27.2°C with nights near 14.2°C. The long-term trend is warming, about 0.4°C per decade.
September is one of the drier months in Crossville, averaging 96 mm of rainfall. The wettest September on record was 1989 with 250 mm, while the driest was 2019 at 11 mm.
Relative humidity in Crossville during September averages 71%. The most humid September was 1989 at 86%, and the least humid was 1999 at 52%.
September receives about 4.7 kWh/m²/day of solar energy in Crossville. The sunniest September was 2019 at 5.7 kWh/m²/day, and the cloudiest was 2009 at 3.9.
Average wind speed in Crossville during September is 0.1 m/s. The windiest Septembers were 2021, 2023 and 2025, among others at 0.2 m/s, while the calmest were 2020, 2022 and 2024, among others at 0.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.9°C | 20.7°C | 20.7°C | 21.4°C | 21.0°C | +1.1°C |
| Avg High | 26.2°C | 27.5°C | 27.1°C | 27.7°C | 27.4°C | +1.2°C |
| Avg Low | 13.5°C | 13.8°C | 14.2°C | 15.1°C | 14.6°C | +1.1°C |
| Avg Rain | 99 mm | 82 mm | 109 mm | 98 mm | 93 mm | -6 mm |
September temperatures in Crossville have risen by about 1.6°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 2°C (1983) to a record high of 37°C (2011).
Rainfall in September is one of the drier months, averaging 96 mm, with a wettest year of 250 mm.
One of the best times to visit Crossville
September is one of the best times to visit Crossville. Expect days averaging 27.2°C and nights around 14.2°C (mean 20.7°C) — warmer than Crossville's yearly average — with higher rainfall (96 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 | 28.3°C | 21.8°C | 15.3°C | 32.8°C | 9.4°C | 107 mm | 70% | 0.2 m/s | 5 |
| 2024 | 28.4°C | 22.0°C | 15.5°C | 33.8°C | 8.4°C | 135 mm | 68% | 0.1 m/s | 4.2 |
| 2023 | 28.6°C | 21.8°C | 14.9°C | 33.1°C | 10.1°C | 31 mm | 69% | 0.2 m/s | 5.1 |
| 2022 | 26.6°C | 20.0°C | 13.4°C | 34.1°C | 5.2°C | 94 mm | 71% | 0.1 m/s | 5.1 |
| 2021 | 25.7°C | 20.0°C | 14.2°C | 30.9°C | 8.4°C | 107 mm | 78% | 0.2 m/s | 4.9 |
| 2020 | 26.6°C | 20.4°C | 14.1°C | 31.7°C | 6.0°C | 82 mm | 76% | 0.1 m/s | 4.6 |
| 2019 🔥 | 32.5°C | 25.0°C | 17.6°C | 36.3°C | 13.3°C | 11 mm | 62% | 0.2 m/s | 5.7 |
| 2018 | 28.8°C | 23.6°C | 18.4°C | 33.3°C | 13.6°C | 197 mm | 79% | 0.1 m/s | 4.2 |
| 2017 | 26.2°C | 19.8°C | 13.4°C | 31.4°C | 7.5°C | 84 mm | 74% | 0.2 m/s | 4.9 |
| 2016 | 30.9°C | 23.5°C | 16.1°C | 34.7°C | 7.4°C | 42 mm | 62% | 0.1 m/s | 5.4 |
| 2015 | 26.8°C | 20.6°C | 14.5°C | 31.5°C | 6.4°C | 94 mm | 74% | 0.2 m/s | 4.8 |
| 2014 | 27.1°C | 21.1°C | 15.1°C | 30.2°C | 6.5°C | 49 mm | 76% | 0.1 m/s | 4.7 |
| 2013 | 26.2°C | 20.1°C | 14.1°C | 30.3°C | 7.9°C | 71 mm | 78% | 0.1 m/s | 5 |
| 2012 | 25.7°C | 19.6°C | 13.5°C | 32.9°C | 3.1°C | 159 mm | 75% | 0.1 m/s | 4.7 |
| 2011 | 24.1°C | 18.8°C | 13.4°C | 37.0°C | 7.2°C | 210 mm | 78% | 0.2 m/s | 4.1 |
| 2010 | 28.8°C | 21.6°C | 14.4°C | 33.8°C | 8.1°C | 65 mm | 65% | 0.1 m/s | 5.2 |
| 2009 | 25.0°C | 20.2°C | 15.5°C | 29.0°C | 6.5°C | 189 mm | 83% | 0.1 m/s | 3.9 |
| 2008 | 28.1°C | 21.5°C | 14.9°C | 32.5°C | 9.3°C | 19 mm | 68% | 0.1 m/s | 4.9 |
| 2007 | 29.8°C | 22.6°C | 15.3°C | 34.6°C | 6.9°C | 64 mm | 62% | 0.2 m/s | 5.2 |
| 2006 | 24.9°C | 18.7°C | 12.4°C | 29.5°C | 5.6°C | 122 mm | 75% | 0.1 m/s | 4.4 |
| 2005 | 30.0°C | 22.4°C | 14.8°C | 33.1°C | 7.1°C | 57 mm | 65% | 0.2 m/s | 5.4 |
| 2004 | 25.6°C | 20.0°C | 14.4°C | 32.2°C | 7.9°C | 168 mm | 80% | 0.1 m/s | 4.5 |
| 2003 | 25.1°C | 19.0°C | 12.9°C | 30.1°C | 3.4°C | 161 mm | 79% | 0.1 m/s | 4.9 |
| 2002 | 29.0°C | 22.5°C | 15.9°C | 34.6°C | 8.9°C | 149 mm | 70% | 0.1 m/s | 4.4 |
| 2001 | 26.0°C | 19.2°C | 12.4°C | 32.2°C | 3.7°C | 81 mm | 67% | 0.2 m/s | 5 |
| 2000 | 27.3°C | 20.4°C | 13.5°C | 31.5°C | 4.1°C | 81 mm | 67% | 0.1 m/s | 4.4 |
| 1999 | 28.2°C | 20.3°C | 12.4°C | 34.5°C | 6.5°C | 27 mm | 52% | 0.2 m/s | 5.3 |
| 1998 | 31.3°C | 23.6°C | 15.8°C | 35.8°C | 8.0°C | 27 mm | 59% | 0.2 m/s | 5.2 |
| 1997 | 27.8°C | 20.7°C | 13.6°C | 33.6°C | 7.3°C | 114 mm | 67% | 0.1 m/s | 4.8 |
| 1996 | 25.0°C | 19.0°C | 13.0°C | 30.7°C | 5.0°C | 140 mm | 76% | 0.1 m/s | 4.3 |
| 1995 | 27.0°C | 20.3°C | 13.6°C | 32.0°C | 5.8°C | 91 mm | 70% | 0.1 m/s | 4.2 |
| 1994 | 26.4°C | 19.4°C | 12.3°C | 31.5°C | 6.0°C | 57 mm | 71% | 0.1 m/s | 4.8 |
| 1993 | 27.4°C | 20.3°C | 13.3°C | 34.2°C | 3.1°C | 99 mm | 67% | 0.1 m/s | 4.4 |
| 1992 | 25.6°C | 20.1°C | 14.6°C | 29.7°C | 3.4°C | 113 mm | 80% | 0.1 m/s | 4.1 |
| 1991 | 27.7°C | 21.3°C | 14.9°C | 34.7°C | 3.0°C | 79 mm | 69% | 0.1 m/s | 4.7 |
| 1990 | 28.4°C | 21.5°C | 14.6°C | 36.1°C | 3.0°C | 75 mm | 67% | 0.2 m/s | 4.9 |
| 1989 🌧️ | 24.1°C | 19.2°C | 14.3°C | 28.8°C | 4.4°C | 250 mm | 86% | 0.1 m/s | 4.1 |
| 1988 | 26.5°C | 20.3°C | 14.2°C | 31.3°C | 6.9°C | 145 mm | 77% | 0.1 m/s | 4.1 |
| 1987 | 26.5°C | 20.2°C | 14.0°C | 30.4°C | 8.3°C | 91 mm | 69% | 0.2 m/s | 4.2 |
| 1986 | 27.1°C | 21.5°C | 15.8°C | 31.4°C | 10.9°C | 103 mm | 79% | 0.1 m/s | 4.2 |
| 1985 | 26.1°C | 19.2°C | 12.3°C | 32.4°C | 5.2°C | 72 mm | 67% | 0.2 m/s | 4.9 |
| 1984 | 27.0°C | 19.6°C | 12.1°C | 34.4°C | 6.1°C | 27 mm | 62% | 0.1 m/s | 4.8 |
| 1983 | 27.7°C | 20.8°C | 13.9°C | 34.8°C | 2.0°C | 43 mm | 64% | 0.1 m/s | — |
| 1982 ❄️ | 24.4°C | 18.6°C | 12.7°C | 29.0°C | 5.7°C | 78 mm | 80% | 0.1 m/s | — |
| 1981 | 26.2°C | 19.3°C | 12.3°C | 31.0°C | 5.2°C | 81 mm | 67% | 0.2 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 27.2°C with lows near 14.2°C (mean 20.7°C), based on 45 years of NASA POWER data.
September averages 96 mm of rainfall in Crossville, one of the drier months. The wettest on record was 250 mm in 1989.
The hottest September reached 37°C in 2011. The coldest dipped to 2°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.6°C. Daytime highs moved from 26.3°C to 27.5°C and overnight lows from 12.7°C to 14.7°C over the same span.
September is one of the warmer months of the year in Crossville and one of the drier months, so plan for around 27.2°C daytime highs and 14.2°C at night.
Not quite — September is the 9th coolest month in Crossville, averaging 20.7°C.
For September in Crossville, pack light layers you can adjust through the day, with typical highs of 27.2°C and lows of 14.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 71% — moderately humid.
Average wind speed in September is 0.1 m/s. The windiest September on record averaged 0.2 m/s (1981).
The wettest September on record was 1989 with 250 mm. On average, September sees 96 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 Crossville 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.
