September is one of the warmer months of the year in Salinas, with average highs near 20.6°C and lows around 13.4°C (mean 17°C). It is one of the drier months, averaging 7 mm of rainfall and 80% relative humidity across the period.
September is one of the warmer months of the year in Salinas. Across 45 years of records, the warmest September in Salinas was 2017 — when the month averaged 19.4°C — while the coldest was 2012 at 15.2°C. Typical September days reach 20.6°C with nights near 13.4°C. The long-term September temperature trend is broadly flat.
September is one of the drier months in Salinas, averaging 7 mm of rainfall. The wettest September on record was 1983 with 44 mm, while the driest were 1987, 1993 and 1995 at 0 mm.
Relative humidity in Salinas during September averages 80%. The most humid September was 2023 at 85%, and the least humid was 1984 at 67%.
September receives about 5.7 kWh/m²/day of solar energy in Salinas. The sunniest Septembers were 2010, 2013 and 2019, among others at 6.1 kWh/m²/day, and the cloudiest was 2020 at 5.2.
Average wind speed in Salinas during September is 2.1 m/s. The windiest September was 1982 at 2.5 m/s, while the calmest were 2008, 2011 and 2020, among others at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.9°C | 16.9°C | 16.7°C | 17.3°C | 17.3°C | +0.4°C |
| Avg High | 20.8°C | 20.5°C | 20.4°C | 20.9°C | 20.7°C | -0.1°C |
| Avg Low | 13.0°C | 13.3°C | 13.0°C | 13.8°C | 14.0°C | +1°C |
| Avg Rain | 16 mm | 2 mm | 4 mm | 6 mm | 5 mm | -11 mm |
September temperatures in Salinas have stayed relatively stable across the record.
September has ranged from a record low of 10°C (1985) to a record high of 36.9°C (2017).
Rainfall in September is one of the drier months, averaging 7 mm, with a wettest year of 44 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
One of the best times to visit Salinas
September is one of the best times to visit Salinas. Expect days averaging 20.6°C and nights around 13.4°C (mean 17°C) — warmer than Salinas's yearly average — with low rainfall (7 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 | 21.1°C | 18.1°C | 15.0°C | 31.0°C | 13.3°C | 10 mm | 85% | 1.9 m/s | 5.4 |
| 2024 | 20.3°C | 16.7°C | 13.1°C | 29.3°C | 11.8°C | 3 mm | 83% | 1.8 m/s | 5.7 |
| 2023 | 19.7°C | 16.9°C | 14.0°C | 21.8°C | 12.6°C | 2 mm | 85% | 2.3 m/s | 5.5 |
| 2022 | 21.4°C | 18.0°C | 14.6°C | 27.2°C | 12.1°C | 12 mm | 79% | 2.1 m/s | 5.7 |
| 2021 | 20.3°C | 16.8°C | 13.3°C | 26.7°C | 11.3°C | 1 mm | 80% | 2.1 m/s | 5.8 |
| 2020 | 21.3°C | 17.5°C | 13.8°C | 29.9°C | 11.9°C | 0 mm | 81% | 1.7 m/s | 5.2 |
| 2019 | 21.9°C | 18.1°C | 14.3°C | 31.3°C | 11.0°C | 4 mm | 78% | 2.2 m/s | 6.1 |
| 2018 | 19.5°C | 16.0°C | 12.5°C | 25.5°C | 11.1°C | 2 mm | 83% | 2 m/s | 6 |
| 2017 🔥 | 23.2°C | 19.4°C | 15.6°C | 36.9°C | 12.3°C | 5 mm | 74% | 2.1 m/s | 5.6 |
| 2016 | 20.9°C | 17.2°C | 13.6°C | 30.4°C | 11.4°C | 1 mm | 76% | 2.1 m/s | 5.9 |
| 2015 | 22.6°C | 18.9°C | 15.3°C | 29.7°C | 12.9°C | 32 mm | 74% | 2 m/s | 5.6 |
| 2014 | 20.9°C | 17.9°C | 15.0°C | 22.7°C | 12.6°C | 5 mm | 85% | 2 m/s | 5.8 |
| 2013 | 20.1°C | 16.8°C | 13.4°C | 24.4°C | 10.8°C | 5 mm | 84% | 2.1 m/s | 6.1 |
| 2012 ❄️ | 18.4°C | 15.2°C | 11.9°C | 26.0°C | 10.5°C | 0 mm | 84% | 1.9 m/s | 5.8 |
| 2011 | 20.5°C | 16.9°C | 13.4°C | 27.5°C | 11.5°C | 0 mm | 80% | 1.7 m/s | 5.7 |
| 2010 | 20.8°C | 16.9°C | 12.9°C | 31.4°C | 10.8°C | 1 mm | 77% | 1.9 m/s | 6.1 |
| 2009 | 20.6°C | 16.9°C | 13.3°C | 26.7°C | 10.7°C | 8 mm | 82% | 1.8 m/s | 5.9 |
| 2008 | 20.8°C | 17.0°C | 13.2°C | 26.7°C | 11.1°C | 1 mm | 78% | 1.7 m/s | 6 |
| 2007 | 20.0°C | 16.6°C | 13.2°C | 26.8°C | 11.2°C | 11 mm | 80% | 2.2 m/s | 5.8 |
| 2006 | 19.8°C | 16.0°C | 12.2°C | 27.4°C | 10.3°C | 1 mm | 81% | 2 m/s | 5.7 |
| 2005 | 19.2°C | 15.6°C | 12.0°C | 27.3°C | 10.9°C | 3 mm | 82% | 2.1 m/s | 5.9 |
| 2004 | 21.5°C | 17.4°C | 13.3°C | 31.0°C | 10.8°C | 2 mm | 75% | 2 m/s | 6.1 |
| 2003 | 21.5°C | 17.8°C | 14.1°C | 29.1°C | 11.7°C | 2 mm | 78% | 2.1 m/s | 6 |
| 2002 | 20.1°C | 16.5°C | 13.0°C | 26.4°C | 10.9°C | 3 mm | 78% | 1.8 m/s | 5.9 |
| 2001 | 19.1°C | 15.8°C | 12.4°C | 28.2°C | 11.1°C | 3 mm | 84% | 1.9 m/s | 5.8 |
| 2000 | 21.6°C | 17.5°C | 13.5°C | 29.0°C | 11.4°C | 7 mm | 78% | 2.1 m/s | 5.6 |
| 1999 | 19.4°C | 16.0°C | 12.7°C | 26.6°C | 10.7°C | 5 mm | 82% | 1.7 m/s | 5.7 |
| 1998 | 20.2°C | 17.1°C | 13.9°C | 27.6°C | 12.0°C | 2 mm | 81% | 2.2 m/s | 5.4 |
| 1997 | 22.8°C | 18.9°C | 15.0°C | 33.6°C | 13.5°C | 1 mm | 78% | 2.4 m/s | 6.1 |
| 1996 | 19.5°C | 15.8°C | 12.1°C | 25.5°C | 10.9°C | 1 mm | 81% | 2 m/s | 5.7 |
| 1995 | 19.8°C | 16.2°C | 12.7°C | 25.8°C | 11.5°C | 0 mm | 84% | 2.2 m/s | 5.9 |
| 1994 | 20.3°C | 16.8°C | 13.2°C | 28.9°C | 11.6°C | 3 mm | 84% | 2.1 m/s | 5.5 |
| 1993 | 20.5°C | 16.6°C | 12.8°C | 26.7°C | 10.0°C | 0 mm | 80% | 2.2 m/s | 5.8 |
| 1992 | 20.8°C | 17.0°C | 13.2°C | 28.4°C | 11.3°C | 0 mm | 80% | 2 m/s | 5.9 |
| 1991 | 20.4°C | 16.8°C | 13.2°C | 26.5°C | 11.7°C | 1 mm | 83% | 1.8 m/s | 5.8 |
| 1990 | 21.1°C | 17.4°C | 13.7°C | 26.9°C | 12.4°C | 9 mm | 83% | 2.3 m/s | 5.9 |
| 1989 | 19.7°C | 16.1°C | 12.4°C | 24.9°C | 11.2°C | 30 mm | 82% | 2.1 m/s | 5.5 |
| 1988 | 20.4°C | 16.2°C | 12.0°C | 25.3°C | 10.8°C | 0 mm | 78% | 2.1 m/s | 5.7 |
| 1987 | 20.8°C | 16.9°C | 13.1°C | 26.1°C | 11.5°C | 0 mm | 80% | 2.3 m/s | 5.6 |
| 1986 | 19.0°C | 15.7°C | 12.3°C | 23.1°C | 10.2°C | 25 mm | 80% | 2.3 m/s | 5.4 |
| 1985 | 19.9°C | 16.3°C | 12.7°C | 27.9°C | 10.0°C | 5 mm | 79% | 2.2 m/s | 5.3 |
| 1984 | 23.8°C | 19.1°C | 14.4°C | 29.9°C | 11.3°C | 2 mm | 67% | 2.1 m/s | 5.5 |
| 1983 🌧️ | 22.6°C | 18.7°C | 14.9°C | 29.8°C | 12.6°C | 44 mm | 76% | 2.2 m/s | — |
| 1982 | 20.5°C | 16.7°C | 12.9°C | 24.4°C | 10.2°C | 39 mm | 77% | 2.5 m/s | — |
| 1981 | 20.4°C | 16.4°C | 12.5°C | 25.2°C | 11.0°C | 1 mm | 81% | 2.2 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 20.6°C with lows near 13.4°C (mean 17°C), based on 45 years of NASA POWER data.
September averages 7 mm of rainfall in Salinas, one of the drier months. The wettest on record was 44 mm in 1983.
The hottest September reached 36.9°C in 2017. The coldest dipped to 10°C in 1985.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have fallen by about 0.1°C — but days and nights have moved in opposite directions. Overnight lows rose from 13.5°C to 14°C while daytime highs eased from 21.4°C to 20.6°C, narrowing the gap between day and night.
September is one of the warmer months of the year in Salinas and one of the drier months, so plan for around 20.6°C daytime highs and 13.4°C at night.
Not quite — September is the 12th coolest month in Salinas, averaging 17°C.
For September in Salinas, pack light layers you can adjust through the day, with typical highs of 20.6°C and lows of 13.4°C.
Relative humidity in September averages 80% — quite humid.
Average wind speed in September is 2.1 m/s. The windiest September on record averaged 2.5 m/s (1982).
The wettest September on record was 1983 with 44 mm. On average, September sees 7 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 Salinas 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.
