September is one of the warmer months of the year in Elgin, with average highs near 14.5°C and lows around 8°C (mean 11.3°C). It is about average for rainfall, averaging 72 mm of rainfall and 86% relative humidity across the period.
September is one of the warmer months of the year in Elgin. Across 45 years of records, the warmest September in Elgin was 2006 — when the month averaged 13.4°C — while the coldest was 1986 at 9.4°C. Typical September days reach 14.5°C with nights near 8°C. The long-term trend is warming, about 0.4°C per decade.
September is about average for rainfall in Elgin, averaging 72 mm of rainfall. The wettest September on record was 1995 with 306 mm, while the driest was 1996 at 38 mm.
Relative humidity in Elgin during September averages 86%. The most humid Septembers were 1995 and 2001 at 90%, and the least humid was 2018 at 82%.
September receives about 2.5 kWh/m²/day of solar energy in Elgin. The sunniest Septembers were 1997 and 2023 at 2.9 kWh/m²/day, and the cloudiest were 1995, 2000 and 2001 at 2.
Average wind speed in Elgin during September is 3.7 m/s. The windiest September was 1983 at 4.6 m/s, while the calmest was 2002 at 2.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.5°C | 11.0°C | 11.6°C | 11.4°C | 12.2°C | +1.7°C |
| Avg High | 13.6°C | 14.3°C | 14.8°C | 14.6°C | 15.9°C | +2.3°C |
| Avg Low | 7.2°C | 7.7°C | 8.4°C | 8.1°C | 8.6°C | +1.4°C |
| Avg Rain | 78 mm | 87 mm | 67 mm | 69 mm | 56 mm | -21 mm |
September temperatures in Elgin have risen by about 1.9°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 1.1°C (1993) to a record high of 25.4°C (2023).
Rainfall in September is about average for rainfall, averaging 72 mm, with a wettest year of 306 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.5°C per decade while lows rose 0.3°C per decade, widening the gap between day and night.
One of the best times to visit Elgin
September is one of the best times to visit Elgin. Expect days averaging 14.5°C and nights around 8°C (mean 11.3°C) — warmer than Elgin's yearly average — with moderate rainfall (72 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 | 15.6°C | 12.0°C | 8.5°C | 19.8°C | 4.3°C | 44 mm | 83% | 4 m/s | 2.8 |
| 2024 | 14.7°C | 11.1°C | 7.5°C | 21.9°C | 3.6°C | 63 mm | 87% | 3 m/s | 2.5 |
| 2023 | 17.2°C | 13.2°C | 9.2°C | 25.4°C | 5.3°C | 60 mm | 83% | 3.6 m/s | 2.9 |
| 2022 | 15.2°C | 12.2°C | 9.1°C | 20.3°C | 5.8°C | 70 mm | 86% | 3.7 m/s | 2.5 |
| 2021 | 17.1°C | 13.3°C | 9.5°C | 23.6°C | 4.8°C | 59 mm | 86% | 2.9 m/s | 2.5 |
| 2020 | 15.3°C | 11.6°C | 7.8°C | 20.5°C | 3.3°C | 41 mm | 82% | 3.7 m/s | 2.5 |
| 2019 | 14.8°C | 11.5°C | 8.2°C | 21.3°C | 4.7°C | 67 mm | 85% | 3.8 m/s | 2.6 |
| 2018 | 14.0°C | 10.8°C | 7.5°C | 21.7°C | 4.5°C | 66 mm | 82% | 4.5 m/s | 2.6 |
| 2017 | 14.3°C | 11.2°C | 8.2°C | 17.9°C | 4.0°C | 108 mm | 87% | 3.5 m/s | 2.3 |
| 2016 | 16.3°C | 12.7°C | 9.1°C | 22.6°C | 5.8°C | 44 mm | 84% | 3.8 m/s | 2.6 |
| 2015 | 14.1°C | 10.8°C | 7.5°C | 18.1°C | 5.7°C | 70 mm | 88% | 3.3 m/s | 2.6 |
| 2014 | 15.9°C | 12.6°C | 9.2°C | 19.8°C | 7.3°C | 38 mm | 86% | 2.7 m/s | 2.4 |
| 2013 | 14.8°C | 11.4°C | 8.0°C | 20.7°C | 4.6°C | 51 mm | 84% | 3.6 m/s | 2.6 |
| 2012 | 13.2°C | 10.2°C | 7.3°C | 19.9°C | 2.8°C | 68 mm | 85% | 4.5 m/s | 2.6 |
| 2011 | 14.8°C | 11.6°C | 8.5°C | 20.5°C | 5.1°C | 73 mm | 88% | 3.9 m/s | 2.4 |
| 2010 | 13.7°C | 10.8°C | 7.9°C | 20.1°C | 3.9°C | 109 mm | 87% | 4 m/s | 2.4 |
| 2009 | 14.9°C | 11.9°C | 8.8°C | 19.8°C | 6.2°C | 108 mm | 85% | 3.8 m/s | 2.6 |
| 2008 | 14.5°C | 11.5°C | 8.4°C | 18.6°C | 5.5°C | 61 mm | 86% | 3 m/s | 2.4 |
| 2007 | 13.5°C | 10.3°C | 7.1°C | 19.1°C | 2.2°C | 61 mm | 87% | 3.8 m/s | 2.3 |
| 2006 🔥 | 17.3°C | 13.4°C | 9.5°C | 20.8°C | 5.6°C | 65 mm | 86% | 3.1 m/s | 2.7 |
| 2005 | 15.4°C | 12.0°C | 8.7°C | 22.3°C | 5.3°C | 49 mm | 84% | 4.2 m/s | 2.5 |
| 2004 | 14.9°C | 11.6°C | 8.4°C | 20.9°C | 5.6°C | 53 mm | 85% | 4.3 m/s | 2.8 |
| 2003 | 15.5°C | 11.8°C | 8.1°C | 20.1°C | 3.1°C | 49 mm | 84% | 3 m/s | 2.8 |
| 2002 | 15.1°C | 11.8°C | 8.6°C | 19.9°C | 5.7°C | 48 mm | 88% | 2.6 m/s | 2.5 |
| 2001 | 13.0°C | 10.4°C | 7.9°C | 16.4°C | 4.8°C | 81 mm | 90% | 3.6 m/s | 2 |
| 2000 | 14.3°C | 11.2°C | 8.2°C | 17.4°C | 4.6°C | 94 mm | 88% | 3.5 m/s | 2 |
| 1999 | 16.2°C | 12.5°C | 8.8°C | 22.6°C | 4.8°C | 78 mm | 88% | 3.5 m/s | 2.4 |
| 1998 | 14.9°C | 11.9°C | 8.9°C | 23.8°C | 3.8°C | 77 mm | 90% | 3.2 m/s | 2.5 |
| 1997 | 14.3°C | 10.7°C | 7.1°C | 18.0°C | 1.8°C | 39 mm | 85% | 3.8 m/s | 2.9 |
| 1996 | 14.8°C | 11.6°C | 8.3°C | 20.4°C | 4.9°C | 38 mm | 86% | 3.4 m/s | 2.7 |
| 1995 🌧️ | 13.5°C | 10.9°C | 8.4°C | 17.9°C | 3.3°C | 306 mm | 90% | 3.2 m/s | 2 |
| 1994 | 13.6°C | 10.2°C | 6.8°C | 19.9°C | 4.7°C | 78 mm | 84% | 3.3 m/s | 2.5 |
| 1993 | 13.2°C | 9.9°C | 6.5°C | 18.5°C | 1.1°C | 38 mm | 86% | 3.1 m/s | 2.4 |
| 1992 | 13.9°C | 10.8°C | 7.6°C | 18.6°C | 4.3°C | 83 mm | 86% | 4.1 m/s | 2.4 |
| 1991 | 14.8°C | 11.1°C | 7.4°C | 21.7°C | 3.0°C | 40 mm | 82% | 3.5 m/s | 2.8 |
| 1990 | 13.3°C | 10.2°C | 7.1°C | 20.6°C | 3.4°C | 89 mm | 84% | 4 m/s | 2.5 |
| 1989 | 14.4°C | 10.9°C | 7.3°C | 18.5°C | 4.0°C | 41 mm | 82% | 3.8 m/s | 2.4 |
| 1988 | 14.1°C | 11.1°C | 8.1°C | 20.7°C | 3.4°C | 64 mm | 85% | 4.3 m/s | 2.5 |
| 1987 | 13.3°C | 10.2°C | 7.0°C | 18.4°C | 3.7°C | 53 mm | 85% | 4.2 m/s | 2.8 |
| 1986 ❄️ | 12.4°C | 9.4°C | 6.3°C | 17.2°C | 1.2°C | 44 mm | 84% | 4.1 m/s | 2.5 |
| 1985 | 13.3°C | 10.3°C | 7.3°C | 20.5°C | 3.3°C | 110 mm | 88% | 3.4 m/s | 2.5 |
| 1984 | 13.2°C | 10.3°C | 7.3°C | 17.1°C | 3.6°C | 92 mm | 84% | 3.1 m/s | 2.2 |
| 1983 | 13.0°C | 10.1°C | 7.1°C | 18.6°C | 2.8°C | 119 mm | 85% | 4.6 m/s | — |
| 1982 | 13.9°C | 10.4°C | 6.9°C | 21.0°C | 3.1°C | 81 mm | 84% | 4.5 m/s | — |
| 1981 | 15.1°C | 11.4°C | 7.7°C | 20.1°C | 4.1°C | 95 mm | 85% | 3.9 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 14.5°C with lows near 8°C (mean 11.3°C), based on 45 years of NASA POWER data.
September averages 72 mm of rainfall in Elgin, about average for rainfall. The wettest on record was 306 mm in 1995.
The hottest September reached 25.4°C in 2023. The coldest dipped to 1.1°C in 1993.
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 13.7°C to 16°C and overnight lows from 7.3°C to 8.8°C over the same span.
September is one of the warmer months of the year in Elgin and about average for rainfall, so plan for around 14.5°C daytime highs and 8°C at night.
Not quite — September is the 9th coolest month in Elgin, averaging 11.3°C.
For September in Elgin, pack light layers you can adjust through the day, with typical highs of 14.5°C and lows of 8°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 86% — quite humid.
Average wind speed in September is 3.7 m/s. The windiest September on record averaged 4.6 m/s (1983).
The wettest September on record was 1995 with 306 mm. On average, September sees 72 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 Elgin 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.
