September is one of the warmer months of the year in Clovis, with average highs near 28.9°C and lows around 14.4°C (mean 21.7°C). It is one of the drier months, averaging 10 mm of rainfall and 32% relative humidity across the period.
September is one of the warmer months of the year in Clovis. Across 45 years of records, the warmest September in Clovis was 2022 — when the month averaged 24.4°C — while the coldest was 1986 at 16.2°C. Typical September days reach 28.9°C with nights near 14.4°C. The long-term trend is warming, about 0.6°C per decade.
September is one of the drier months in Clovis, averaging 10 mm of rainfall. The wettest September on record was 1982 with 74 mm, while the driest was 2012 at 0 mm.
Relative humidity in Clovis during September averages 32%. The most humid September was 2025 at 49%, and the least humid was 2018 at 23%.
September receives about 6.1 kWh/m²/day of solar energy in Clovis. The sunniest Septembers were 2003, 2004 and 2010 at 6.4 kWh/m²/day, and the cloudiest was 2020 at 5.1.
Average wind speed in Clovis during September is 0.9 m/s. The windiest September was 2010 at 1 m/s, while the calmest were 2020, 2023 and 2025, among others at 0.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 20.3°C | 21.5°C | 21.7°C | 22.2°C | 23.0°C | +2.7°C |
| Avg High | 27.5°C | 28.9°C | 29.2°C | 29.4°C | 29.9°C | +2.4°C |
| Avg Low | 13.1°C | 14.1°C | 14.3°C | 14.9°C | 16.2°C | +3.1°C |
| Avg Rain | 24 mm | 9 mm | 5 mm | 5 mm | 9 mm | -15 mm |
September temperatures in Clovis have risen by about 2.3°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 2.3°C (1986) to a record high of 41.4°C (2022).
Rainfall in September is one of the drier months, averaging 10 mm, with a wettest year of 74 mm.
One of the best times to visit Clovis
September is one of the best times to visit Clovis. Expect days averaging 28.9°C and nights around 14.4°C (mean 21.7°C) — warmer than Clovis's yearly average — with low rainfall (10 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 | 28.5°C | 22.3°C | 16.0°C | 36.0°C | 11.6°C | 31 mm | 49% | 0.8 m/s | 5.7 |
| 2024 | 30.9°C | 23.4°C | 16.0°C | 37.5°C | 7.8°C | 1 mm | 30% | 0.9 m/s | 6.1 |
| 2023 | 27.4°C | 21.0°C | 14.5°C | 33.3°C | 9.0°C | 8 mm | 44% | 0.8 m/s | 5.8 |
| 2022 🔥 | 31.3°C | 24.4°C | 17.5°C | 41.4°C | 9.6°C | 10 mm | 36% | 0.9 m/s | 5.8 |
| 2021 | 30.4°C | 23.2°C | 16.0°C | 38.2°C | 9.4°C | 1 mm | 26% | 0.9 m/s | 6 |
| 2020 | 30.9°C | 23.9°C | 16.9°C | 38.7°C | 11.4°C | 0 mm | 25% | 0.8 m/s | 5.1 |
| 2019 | 28.1°C | 21.2°C | 14.2°C | 36.2°C | 3.6°C | 2 mm | 35% | 0.9 m/s | 6.2 |
| 2018 | 30.2°C | 22.6°C | 14.9°C | 34.4°C | 10.1°C | 1 mm | 23% | 0.9 m/s | 6.3 |
| 2017 | 27.8°C | 21.2°C | 14.6°C | 39.8°C | 3.6°C | 15 mm | 42% | 0.8 m/s | 5.9 |
| 2016 | 28.6°C | 21.3°C | 13.9°C | 34.8°C | 7.0°C | 2 mm | 29% | 0.9 m/s | 6.3 |
| 2015 | 29.6°C | 22.8°C | 16.0°C | 36.4°C | 9.3°C | 8 mm | 30% | 0.9 m/s | 5.8 |
| 2014 | 29.6°C | 22.6°C | 15.6°C | 34.4°C | 7.5°C | 11 mm | 35% | 0.9 m/s | 6.1 |
| 2013 | 28.0°C | 20.7°C | 13.4°C | 33.5°C | 5.0°C | 4 mm | 35% | 0.9 m/s | 6.2 |
| 2012 | 31.2°C | 23.8°C | 16.3°C | 34.0°C | 12.3°C | 0 mm | 25% | 0.9 m/s | 6.2 |
| 2011 | 31.0°C | 23.6°C | 16.2°C | 35.5°C | 11.7°C | 5 mm | 31% | 0.9 m/s | 6.1 |
| 2010 | 29.8°C | 22.1°C | 14.3°C | 37.5°C | 6.3°C | 0 mm | 25% | 1 m/s | 6.4 |
| 2009 | 31.1°C | 23.5°C | 16.0°C | 36.6°C | 4.7°C | 1 mm | 27% | 0.9 m/s | 6.1 |
| 2008 | 30.4°C | 22.7°C | 15.0°C | 36.2°C | 9.6°C | 1 mm | 24% | 0.9 m/s | 6.3 |
| 2007 | 26.3°C | 19.5°C | 12.7°C | 36.5°C | 4.7°C | 8 mm | 38% | 0.8 m/s | 6.2 |
| 2006 | 29.5°C | 21.6°C | 13.7°C | 35.3°C | 6.0°C | 2 mm | 25% | 0.9 m/s | 6.3 |
| 2005 | 27.0°C | 19.7°C | 12.3°C | 32.5°C | 6.6°C | 7 mm | 31% | 0.9 m/s | 6.3 |
| 2004 | 28.4°C | 21.0°C | 13.6°C | 35.1°C | 4.4°C | 2 mm | 26% | 0.9 m/s | 6.4 |
| 2003 | 31.5°C | 23.9°C | 16.3°C | 36.8°C | 10.6°C | 5 mm | 26% | 0.9 m/s | 6.4 |
| 2002 | 29.5°C | 22.0°C | 14.5°C | 35.8°C | 7.8°C | 2 mm | 28% | 0.9 m/s | 6 |
| 2001 | 29.8°C | 22.4°C | 15.0°C | 35.3°C | 11.9°C | 7 mm | 31% | 0.9 m/s | 6.3 |
| 2000 | 28.4°C | 21.0°C | 13.5°C | 35.9°C | 6.3°C | 11 mm | 33% | 0.9 m/s | 6.1 |
| 1999 | 30.3°C | 22.6°C | 15.0°C | 33.8°C | 9.7°C | 11 mm | 30% | 0.9 m/s | 6.3 |
| 1998 | 26.9°C | 20.2°C | 13.5°C | 38.7°C | 6.1°C | 22 mm | 46% | 0.8 m/s | 6.1 |
| 1997 | 29.3°C | 22.1°C | 14.8°C | 33.0°C | 9.5°C | 7 mm | 33% | 0.9 m/s | 5.9 |
| 1996 | 27.9°C | 20.5°C | 13.0°C | 33.9°C | 6.9°C | 1 mm | 27% | 0.9 m/s | 6.3 |
| 1995 | 29.6°C | 22.2°C | 14.7°C | 34.5°C | 6.6°C | 1 mm | 28% | 0.9 m/s | 6.3 |
| 1994 | 28.1°C | 20.8°C | 13.4°C | 32.8°C | 5.9°C | 25 mm | 33% | 0.9 m/s | 5.6 |
| 1993 | 29.0°C | 21.3°C | 13.6°C | 35.4°C | 7.1°C | 1 mm | 26% | 0.9 m/s | 6.3 |
| 1992 | 29.4°C | 21.9°C | 14.4°C | 33.3°C | 8.6°C | 2 mm | 26% | 0.9 m/s | 6.1 |
| 1991 | 30.2°C | 22.7°C | 15.2°C | 34.9°C | 7.7°C | 6 mm | 31% | 0.9 m/s | 6.2 |
| 1990 | 28.4°C | 21.0°C | 13.6°C | 34.2°C | 9.4°C | 12 mm | 32% | 0.9 m/s | 6.1 |
| 1989 | 26.9°C | 19.4°C | 11.9°C | 32.2°C | 4.8°C | 43 mm | 38% | 0.9 m/s | 5.9 |
| 1988 | 29.5°C | 22.0°C | 14.5°C | 39.6°C | 7.6°C | 6 mm | 25% | 0.9 m/s | 6 |
| 1987 | 29.6°C | 21.9°C | 14.2°C | 35.0°C | 8.7°C | 2 mm | 25% | 0.9 m/s | 6 |
| 1986 ❄️ | 23.2°C | 16.2°C | 9.3°C | 33.8°C | 2.3°C | 25 mm | 40% | 0.9 m/s | 6 |
| 1985 | 24.0°C | 17.2°C | 10.4°C | 31.5°C | 5.5°C | 22 mm | 43% | 0.9 m/s | 5.7 |
| 1984 | 30.0°C | 22.6°C | 15.3°C | 34.4°C | 6.7°C | 6 mm | 30% | 0.9 m/s | 5.8 |
| 1983 | 29.0°C | 21.9°C | 14.8°C | 35.1°C | 7.7°C | 32 mm | 35% | 0.9 m/s | — |
| 1982 🌧️ | 26.0°C | 19.2°C | 12.4°C | 34.0°C | 3.5°C | 74 mm | 40% | 0.9 m/s | — |
| 1981 | 29.4°C | 22.1°C | 14.8°C | 34.7°C | 9.0°C | 3 mm | 29% | 0.9 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 28.9°C with lows near 14.4°C (mean 21.7°C), based on 45 years of NASA POWER data.
September averages 10 mm of rainfall in Clovis, one of the drier months. The wettest on record was 74 mm in 1982.
The hottest September reached 41.4°C in 2022. The coldest dipped to 2.3°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 2.3°C. Daytime highs moved from 27.7°C to 29.7°C and overnight lows from 13.5°C to 16°C over the same span.
September is one of the warmer months of the year in Clovis and one of the drier months, so plan for around 28.9°C daytime highs and 14.4°C at night.
Not quite — September is the 10th coolest month in Clovis, averaging 21.7°C.
For September in Clovis, pack light layers you can adjust through the day, with typical highs of 28.9°C and lows of 14.4°C.
Relative humidity in September averages 32% — relatively dry.
Average wind speed in September is 0.9 m/s. The windiest September on record averaged 1 m/s (2010).
The wettest September on record was 1982 with 74 mm. On average, September sees 10 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 Clovis 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.
