September is one of the warmer months of the year in Una, with average highs near 34.9°C and lows around 20.5°C (mean 27.7°C). It is a relatively wet time of year, averaging 124 mm of rainfall and 63% relative humidity across the period.
September is one of the warmer months of the year in Una. Across 45 years of records, the warmest September in Una was 1999 — when the month averaged 30.3°C — while the coldest was 1984 at 25.2°C. Typical September days reach 34.9°C with nights near 20.5°C. The long-term trend is cooling, about 0.3°C per decade.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 28.5°C | 27.8°C | 27.8°C | 27.1°C | 27.1°C | -1.4°C |
| Avg High | 36.8°C | 35.4°C | 35.4°C | 33.7°C | 32.4°C | -4.4°C |
| Avg Low | 20.1°C | 20.2°C | 20.3°C | 20.6°C | 21.8°C | +1.7°C |
| Avg Rain | 80 mm | 104 mm | 107 mm | 176 mm | 163 mm | +83 mm |
September temperatures in Una have fallen by about 0.8°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 17.4°C (1994) to a record high of 39.3°C (1987).
Rainfall in September is a relatively wet time of year, averaging 124 mm, with a wettest year of 401 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 1°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
A good time to visit Una
September is a good time to visit Una, with days averaging 34.9°C and nights around 20.5°C (mean 27.7°C, warmer than Una's yearly average) and higher rainfall. March and November are marginally more temperate, but September still suits most travellers.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 32.1°C | 22.8°C | 27.5°C | 255 mm | 84% | 1.5 m/s | 4.6 |
| 2024 | 32.8°C | 22.1°C | 27.4°C | 176 mm | 82% | 1.2 m/s | 4.9 |
| 2023 | 31.9°C | 21.4°C | 26.7°C | 112 mm | 80% | 1.2 m/s | 5.1 |
| 2022 | 31.2°C | 21.3°C | 26.2°C | 190 mm | 81% | 1.2 m/s | 4.8 |
| 2021 | 32.1°C | 22.2°C | 27.1°C | 218 mm | 80% | 1.2 m/s | 4.4 |
| 2020 | 34.0°C | 20.9°C | 27.4°C | 27 mm | 71% | 1.3 m/s | 5.7 |
| 2019 | 33.1°C | 21.1°C | 27.1°C | 137 mm | 76% | 1.2 m/s | 4.8 |
| 2018 | 32.1°C | 19.5°C | 25.8°C | 325 mm | 76% | 1.3 m/s | 4.7 |
| 2017 | 34.9°C | 20.3°C | 27.6°C | 95 mm | 66% | 1.4 m/s | 5.5 |
| 2016 | 34.0°C | 22.5°C | 28.2°C | 72 mm | 65% | 1.3 m/s | 5.4 |
| 2015 | 36.4°C | 19.7°C | 28.1°C | 105 mm | 56% | 1.4 m/s | 5.7 |
| 2014 🌧️ | 33.2°C | 21.7°C | 27.4°C | 401 mm | 78% | 1.3 m/s | 5 |
| 2013 | 32.3°C | 21.1°C | 26.7°C | 46 mm | 73% | 1.3 m/s | 5.4 |
| 2012 | 35.4°C | 19.6°C | 27.5°C | 163 mm | 68% | 1.5 m/s | 5.1 |
| 2011 | 33.0°C | 21.2°C | 27.1°C | 183 mm | 77% | 1.2 m/s | 5 |
| 2010 | 32.3°C | 19.3°C | 25.8°C | 237 mm | 76% | 1.2 m/s | 4.9 |
| 2009 | 35.8°C | 21.2°C | 28.5°C | 107 mm | 60% | 1.2 m/s | 5.3 |
| 2008 | 31.1°C | 20.1°C | 25.6°C | 180 mm | 74% | 1.2 m/s | 5.6 |
| 2007 | 35.0°C | 20.5°C | 27.7°C | 51 mm | 58% | 1.2 m/s | 5.1 |
| 2006 | 34.0°C | 19.3°C | 26.6°C | 188 mm | 71% | 1.4 m/s | 5.3 |
| 2005 | 38.6°C | 20.5°C | 29.5°C | 156 mm | 60% | 1.2 m/s | 4.6 |
| 2004 | 36.8°C | 21.3°C | 29.1°C | 9 mm | 49% | 1.4 m/s | 5.6 |
| 2003 | 34.1°C | 20.3°C | 27.2°C | 102 mm | 64% | 1.2 m/s | 5 |
| 2002 | 34.7°C | 19.9°C | 27.3°C | 166 mm | 60% | 1.4 m/s | 5.3 |
| 2001 | 36.8°C | 20.3°C | 28.5°C | 32 mm | 45% | 1.5 m/s | 6 |
| 2000 | 37.2°C | 19.2°C | 28.2°C | 74 mm | 48% | 1.5 m/s | 5.5 |
| 1999 🔥 | 37.9°C | 22.6°C | 30.3°C | 85 mm | 49% | 1.4 m/s | 5 |
| 1998 | 38.0°C | 22.3°C | 30.2°C | 55 mm | 54% | 1.3 m/s | 4.4 |
| 1997 | 35.0°C | 18.4°C | 26.7°C | 14 mm | 59% | 1.3 m/s | 5 |
| 1996 | 34.1°C | 20.4°C | 27.3°C | 99 mm | 68% | 1.3 m/s | 4.8 |
| 1995 | 33.3°C | 20.9°C | 27.1°C | 100 mm | 70% | 1.3 m/s | 5.2 |
| 1994 | 33.4°C | 17.4°C | 25.4°C | 89 mm | 64% | 1.3 m/s | 5.1 |
| 1993 | 35.4°C | 20.5°C | 28.0°C | 137 mm | 59% | 1.2 m/s | 4.9 |
| 1992 | 35.1°C | 19.1°C | 27.1°C | 138 mm | 65% | 1.4 m/s | 5.1 |
| 1991 | 36.8°C | 20.0°C | 28.4°C | 93 mm | 56% | 1.4 m/s | 5.2 |
| 1990 | 34.8°C | 20.2°C | 27.5°C | 236 mm | 72% | 1.3 m/s | 4.4 |
| 1989 | 37.5°C | 20.2°C | 28.8°C | 45 mm | 46% | 1.5 m/s | 5.3 |
| 1988 | 38.1°C | 20.6°C | 29.3°C | 278 mm | 58% | 1.6 m/s | 4.6 |
| 1987 | 39.3°C | 21.1°C | 30.2°C | 3 mm | 35% | 1.7 m/s | 5.5 |
| 1986 | 37.7°C | 20.0°C | 28.9°C | 53 mm | 42% | 1.6 m/s | 5.1 |
| 1985 | 35.2°C | 19.6°C | 27.4°C | 27 mm | 56% | 1.4 m/s | 5.1 |
| 1984 ❄️ | 31.9°C | 18.5°C | 25.2°C | 135 mm | 71% | 1.3 m/s | 5.4 |
| 1983 | 36.9°C | 21.3°C | 29.1°C | 86 mm | 54% | 1.6 m/s | — |
| 1982 | 38.7°C | 18.7°C | 28.7°C | 8 mm | 35% | 1.7 m/s | — |
| 1981 | 36.0°C | 20.9°C | 28.5°C | 89 mm | 57% | 1.5 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 34.9°C with lows near 20.5°C (mean 27.7°C), based on 45 years of NASA POWER data.
September averages 124 mm of rainfall in Una, a relatively wet time of year. The wettest on record was 401 mm in 2014.
The hottest September reached 39.3°C in 1987. The coldest dipped to 17.4°C in 1994.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have fallen by about 0.8°C. Daytime highs moved from 35.7°C to 32°C and overnight lows from 19.8°C to 22°C over the same span.
September is one of the warmer months of the year in Una and a relatively wet time of year, so plan for around 34.9°C daytime highs and 20.5°C at night.
Not quite — September is the 8th coolest month in Una, averaging 27.7°C.
For September in Una, pack light, breathable clothing and sun protection, with typical highs of 34.9°C and lows of 20.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 63% — moderately humid.
Average wind speed in September is 1.4 m/s. The windiest September on record averaged 1.7 m/s (1982).
The wettest September on record was 2014 with 401 mm. On average, September sees 124 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 Una 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.
