September is one of the warmer months of the year in Dundee, with average highs near 14.9°C and lows around 8.3°C (mean 11.6°C). It is about average for rainfall, averaging 79 mm of rainfall and 87% relative humidity across the period.
September is one of the warmer months of the year in Dundee. Across 45 years of records, the warmest September in Dundee was 2006 — when the month averaged 13.8°C — while the coldest was 1986 at 9.6°C. Typical September days reach 14.9°C with nights near 8.3°C. The long-term trend is warming, about 0.3°C per decade.
September is about average for rainfall in Dundee, averaging 79 mm of rainfall. The wettest September on record was 2000 with 155 mm, while the driest was 1986 at 26 mm.
Relative humidity in Dundee during September averages 87%. The most humid September was 1998 at 91%, and the least humid was 1984 at 83%.
September receives about 2.5 kWh/m²/day of solar energy in Dundee. The sunniest September was 1991 at 3 kWh/m²/day, and the cloudiest was 2000 at 2.
Average wind speed in Dundee during September is 3.4 m/s. The windiest Septembers were 1983 and 2012 at 4.4 m/s, while the calmest was 2002 at 2.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.8°C | 11.3°C | 12.0°C | 11.6°C | 12.4°C | +1.6°C |
| Avg High | 14.2°C | 14.6°C | 15.2°C | 14.8°C | 15.8°C | +1.6°C |
| Avg Low | 7.5°C | 8.0°C | 8.7°C | 8.4°C | 8.9°C | +1.4°C |
| Avg Rain | 95 mm | 78 mm | 77 mm | 71 mm | 71 mm | -24 mm |
September temperatures in Dundee have risen by about 1.6°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 0.8°C (1986) to a record high of 23.6°C (2023).
Rainfall in September is about average for rainfall, averaging 79 mm, with a wettest year of 155 mm.
One of the best times to visit Dundee
September is one of the best times to visit Dundee. Expect days averaging 14.9°C and nights around 8.3°C (mean 11.6°C) — warmer than Dundee's yearly average — with moderate rainfall (79 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 | 15.7°C | 12.2°C | 8.7°C | 18.5°C | 3.5°C | 71 mm | 85% | 3.5 m/s | 2.7 |
| 2024 | 14.6°C | 11.1°C | 7.5°C | 21.1°C | 2.8°C | 38 mm | 88% | 3.1 m/s | 2.7 |
| 2023 | 16.8°C | 13.3°C | 9.8°C | 23.6°C | 4.1°C | 95 mm | 87% | 3.4 m/s | 2.8 |
| 2022 | 15.9°C | 12.5°C | 9.1°C | 19.9°C | 4.4°C | 107 mm | 87% | 3.4 m/s | 2.6 |
| 2021 | 17.1°C | 13.7°C | 10.3°C | 22.3°C | 5.8°C | 68 mm | 88% | 2.7 m/s | 2.6 |
| 2020 | 14.9°C | 11.5°C | 8.1°C | 19.6°C | 1.8°C | 48 mm | 87% | 3.6 m/s | 2.7 |
| 2019 | 14.9°C | 11.6°C | 8.2°C | 19.0°C | 5.3°C | 74 mm | 88% | 3.3 m/s | 2.7 |
| 2018 | 14.3°C | 10.9°C | 7.5°C | 19.5°C | 3.0°C | 74 mm | 86% | 4.3 m/s | 2.6 |
| 2017 | 14.6°C | 11.6°C | 8.5°C | 16.8°C | 5.2°C | 97 mm | 89% | 3.1 m/s | 2.3 |
| 2016 | 16.1°C | 12.9°C | 9.8°C | 20.5°C | 7.2°C | 81 mm | 89% | 3.6 m/s | 2.5 |
| 2015 | 14.7°C | 11.1°C | 7.6°C | 18.2°C | 5.7°C | 44 mm | 88% | 2.8 m/s | 2.6 |
| 2014 | 15.9°C | 12.6°C | 9.3°C | 18.1°C | 6.3°C | 34 mm | 89% | 2.3 m/s | 2.4 |
| 2013 | 14.7°C | 11.4°C | 8.2°C | 20.1°C | 4.5°C | 40 mm | 86% | 3.4 m/s | 2.6 |
| 2012 | 13.4°C | 10.3°C | 7.2°C | 17.9°C | 2.3°C | 52 mm | 88% | 4.4 m/s | 2.7 |
| 2011 | 14.8°C | 11.9°C | 9.0°C | 20.4°C | 4.3°C | 108 mm | 90% | 3.9 m/s | 2.5 |
| 2010 | 14.5°C | 11.6°C | 8.7°C | 18.7°C | 3.7°C | 104 mm | 89% | 3.7 m/s | 2.5 |
| 2009 | 15.1°C | 12.0°C | 8.9°C | 18.2°C | 5.9°C | 91 mm | 88% | 3.7 m/s | 2.7 |
| 2008 | 14.4°C | 11.7°C | 8.9°C | 17.4°C | 5.3°C | 88 mm | 89% | 3.1 m/s | 2.3 |
| 2007 | 14.5°C | 10.9°C | 7.2°C | 20.3°C | 1.4°C | 31 mm | 88% | 3.6 m/s | 2.6 |
| 2006 🔥 | 17.1°C | 13.8°C | 10.4°C | 20.8°C | 6.8°C | 115 mm | 88% | 2.8 m/s | 2.6 |
| 2005 | 15.6°C | 12.3°C | 8.9°C | 21.3°C | 3.7°C | 57 mm | 87% | 3.8 m/s | 2.5 |
| 2004 | 14.8°C | 11.9°C | 9.0°C | 19.6°C | 6.1°C | 62 mm | 88% | 4.1 m/s | 2.7 |
| 2003 | 15.6°C | 12.0°C | 8.4°C | 19.2°C | 3.6°C | 62 mm | 86% | 2.7 m/s | 2.7 |
| 2002 | 15.5°C | 12.0°C | 8.5°C | 18.1°C | 5.5°C | 35 mm | 89% | 2.2 m/s | 2.5 |
| 2001 | 14.4°C | 11.1°C | 7.9°C | 17.2°C | 5.5°C | 72 mm | 88% | 3.6 m/s | 2.3 |
| 2000 🌧️ | 14.8°C | 11.8°C | 8.8°C | 17.9°C | 5.4°C | 155 mm | 90% | 3.3 m/s | 2 |
| 1999 | 16.3°C | 12.9°C | 9.5°C | 21.5°C | 6.4°C | 103 mm | 90% | 3.3 m/s | 2.4 |
| 1998 | 14.9°C | 12.2°C | 9.4°C | 21.7°C | 4.8°C | 95 mm | 91% | 3 m/s | 2.5 |
| 1997 | 14.5°C | 11.1°C | 7.7°C | 17.4°C | 4.4°C | 47 mm | 87% | 3.4 m/s | 2.9 |
| 1996 | 15.2°C | 11.9°C | 8.6°C | 21.9°C | 5.8°C | 46 mm | 86% | 3.3 m/s | 2.9 |
| 1995 | 14.7°C | 11.3°C | 7.9°C | 17.8°C | 2.0°C | 154 mm | 88% | 3.1 m/s | 2.4 |
| 1994 | 14.0°C | 10.5°C | 7.0°C | 18.1°C | 3.4°C | 50 mm | 85% | 3.4 m/s | 2.6 |
| 1993 | 13.4°C | 10.2°C | 7.1°C | 21.0°C | 2.2°C | 57 mm | 88% | 3.2 m/s | 2.3 |
| 1992 | 13.5°C | 10.6°C | 7.6°C | 17.4°C | 4.9°C | 124 mm | 89% | 3.9 m/s | 2.4 |
| 1991 | 15.6°C | 11.7°C | 7.8°C | 23.0°C | 1.8°C | 53 mm | 84% | 3.3 m/s | 3 |
| 1990 | 14.3°C | 10.8°C | 7.3°C | 19.6°C | 3.1°C | 53 mm | 84% | 3.8 m/s | 2.6 |
| 1989 | 14.8°C | 11.1°C | 7.5°C | 17.8°C | 4.9°C | 51 mm | 85% | 3.4 m/s | 2.4 |
| 1988 | 14.4°C | 11.1°C | 7.9°C | 19.5°C | 0.8°C | 84 mm | 88% | 4 m/s | 2.4 |
| 1987 | 13.6°C | 10.5°C | 7.5°C | 17.7°C | 2.3°C | 75 mm | 87% | 4 m/s | 2.7 |
| 1986 ❄️ | 13.5°C | 9.6°C | 5.7°C | 17.5°C | 0.8°C | 26 mm | 85% | 3.6 m/s | 2.7 |
| 1985 | 13.8°C | 10.8°C | 7.7°C | 18.1°C | 3.3°C | 136 mm | 90% | 3.4 m/s | 2.2 |
| 1984 | 14.0°C | 10.8°C | 7.7°C | 17.7°C | 4.6°C | 110 mm | 83% | 3 m/s | 2.3 |
| 1983 | 13.8°C | 10.7°C | 7.7°C | 17.8°C | 3.0°C | 113 mm | 85% | 4.4 m/s | — |
| 1982 | 14.3°C | 10.9°C | 7.4°C | 20.1°C | 2.3°C | 123 mm | 86% | 4.3 m/s | — |
| 1981 | 15.3°C | 11.9°C | 8.6°C | 20.0°C | 5.6°C | 135 mm | 86% | 3.7 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 14.9°C with lows near 8.3°C (mean 11.6°C), based on 45 years of NASA POWER data.
September averages 79 mm of rainfall in Dundee, about average for rainfall. The wettest on record was 155 mm in 2000.
The hottest September reached 23.6°C in 2023. The coldest dipped to 0.8°C in 1986.
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 14.2°C to 16°C and overnight lows from 7.8°C to 9.1°C over the same span.
September is one of the warmer months of the year in Dundee and about average for rainfall, so plan for around 14.9°C daytime highs and 8.3°C at night.
Not quite — September is the 9th coolest month in Dundee, averaging 11.6°C.
For September in Dundee, pack light layers you can adjust through the day, with typical highs of 14.9°C and lows of 8.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 87% — quite humid.
Average wind speed in September is 3.4 m/s. The windiest September on record averaged 4.4 m/s (1983).
The wettest September on record was 2000 with 155 mm. On average, September sees 79 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 Dundee 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.
