May is one of the cooler months of the year in Dandenong, with average highs near 16.4°C and lows around 9.5°C (mean 13°C). It is about average for rainfall, averaging 63 mm of rainfall and 80% relative humidity across the period.
May is one of the cooler months of the year in Dandenong. Across 45 years of records, the warmest May in Dandenong was 2007 — when the month averaged 14.8°C — while the coldest was 2020 at 11.3°C. Typical May days reach 16.4°C with nights near 9.5°C. The long-term May temperature trend is broadly flat.
May is about average for rainfall in Dandenong, averaging 63 mm of rainfall. The wettest May on record was 2012 with 133 mm, while the driest was 2025 at 19 mm.
Relative humidity in Dandenong during May averages 80%. The most humid May was 1983 at 86%, and the least humid was 2025 at 73%.
May receives about 2.3 kWh/m²/day of solar energy in Dandenong. The sunniest May was 2025 at 2.9 kWh/m²/day, and the cloudiest was 1988 at 2.
Average wind speed in Dandenong during May is 3.1 m/s. The windiest May was 1994 at 4.4 m/s, while the calmest was 1991 at 2.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.9°C | 12.7°C | 13.2°C | 13.2°C | 12.8°C | -0.1°C |
| Avg High | 16.4°C | 16.1°C | 16.7°C | 16.5°C | 16.4°C | 0°C |
| Avg Low | 9.4°C | 9.3°C | 9.7°C | 9.8°C | 9.3°C | -0.1°C |
| Avg Rain | 81 mm | 54 mm | 53 mm | 73 mm | 48 mm | -33 mm |
May temperatures in Dandenong have risen by about 0.5°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 4.1°C (2010) to a record high of 25.1°C (2013).
Rainfall in May is about average for rainfall, averaging 63 mm, with a wettest year of 133 mm.
A good time to visit Dandenong
May is a good time to visit Dandenong, with days averaging 16.4°C and nights around 9.5°C (mean 13°C, cooler than Dandenong's yearly average) and moderate rainfall. February and January are marginally more temperate, but May still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 18.2°C | 14.2°C | 10.2°C | 24.2°C | 5.2°C | 19 mm | 73% | 3 m/s | 2.9 |
| 2024 | 17.1°C | 13.2°C | 9.3°C | 19.9°C | 6.3°C | 33 mm | 80% | 2.4 m/s | 2.7 |
| 2023 | 15.5°C | 12.4°C | 9.3°C | 20.1°C | 7.2°C | 68 mm | 79% | 3.4 m/s | 2.2 |
| 2022 | 16.2°C | 12.9°C | 9.5°C | 20.6°C | 6.2°C | 34 mm | 81% | 2.8 m/s | 2.1 |
| 2021 | 16.7°C | 12.8°C | 9.0°C | 23.0°C | 4.1°C | 72 mm | 77% | 3.2 m/s | 2.4 |
| 2020 ❄️ | 14.4°C | 11.3°C | 8.2°C | 18.2°C | 4.9°C | 64 mm | 84% | 3.5 m/s | 2.4 |
| 2019 | 17.1°C | 13.7°C | 10.2°C | 21.8°C | 7.3°C | 91 mm | 77% | 3.7 m/s | 2.1 |
| 2018 | 16.8°C | 13.6°C | 10.4°C | 24.6°C | 6.8°C | 70 mm | 76% | 3.7 m/s | 2.1 |
| 2017 | 16.5°C | 13.0°C | 9.5°C | 20.2°C | 7.1°C | 38 mm | 79% | 3 m/s | 2.4 |
| 2016 | 17.4°C | 13.9°C | 10.4°C | 23.6°C | 4.5°C | 72 mm | 75% | 4.3 m/s | 2.2 |
| 2015 | 16.1°C | 12.7°C | 9.2°C | 21.4°C | 5.5°C | 85 mm | 80% | 4 m/s | 2.2 |
| 2014 | 17.6°C | 14.0°C | 10.4°C | 22.1°C | 4.5°C | 46 mm | 80% | 3.1 m/s | 2.2 |
| 2013 | 16.9°C | 13.3°C | 9.7°C | 25.1°C | 6.9°C | 65 mm | 77% | 3.3 m/s | 2.3 |
| 2012 🌧️ | 15.4°C | 12.5°C | 9.5°C | 20.7°C | 5.7°C | 133 mm | 81% | 3.6 m/s | 2.2 |
| 2011 | 14.6°C | 11.8°C | 9.0°C | 19.1°C | 6.6°C | 75 mm | 83% | 3 m/s | 2.1 |
| 2010 | 17.0°C | 13.4°C | 9.8°C | 21.5°C | 4.1°C | 54 mm | 81% | 2.8 m/s | 2.4 |
| 2009 | 16.7°C | 13.1°C | 9.6°C | 21.2°C | 6.8°C | 25 mm | 81% | 2.7 m/s | 2.5 |
| 2008 | 16.2°C | 12.6°C | 9.0°C | 20.4°C | 4.9°C | 50 mm | 81% | 2.7 m/s | 2.2 |
| 2007 🔥 | 18.3°C | 14.8°C | 11.3°C | 21.7°C | 7.7°C | 71 mm | 77% | 4.1 m/s | 2.2 |
| 2006 | 15.4°C | 12.1°C | 8.8°C | 19.3°C | 6.2°C | 64 mm | 83% | 3 m/s | 2.2 |
| 2005 | 17.4°C | 13.7°C | 10.0°C | 22.6°C | 6.7°C | 20 mm | 76% | 3 m/s | 2.7 |
| 2004 | 15.9°C | 12.4°C | 8.8°C | 19.3°C | 6.3°C | 53 mm | 80% | 3.5 m/s | 2.2 |
| 2003 | 17.7°C | 13.7°C | 9.7°C | 22.2°C | 5.7°C | 36 mm | 78% | 2.5 m/s | 2.5 |
| 2002 | 17.6°C | 14.0°C | 10.4°C | 24.6°C | 6.9°C | 68 mm | 77% | 2.8 m/s | 2.5 |
| 2001 | 15.5°C | 12.5°C | 9.6°C | 20.4°C | 7.3°C | 30 mm | 85% | 2.5 m/s | 2.4 |
| 2000 | 15.8°C | 12.8°C | 9.7°C | 19.7°C | 6.0°C | 115 mm | 80% | 3.9 m/s | 2.1 |
| 1999 | 17.3°C | 13.3°C | 9.4°C | 22.1°C | 5.8°C | 75 mm | 76% | 3.5 m/s | 2.3 |
| 1998 | 16.3°C | 13.0°C | 9.6°C | 21.2°C | 5.3°C | 51 mm | 80% | 3.1 m/s | 2.3 |
| 1997 | 16.0°C | 12.8°C | 9.7°C | 24.4°C | 6.4°C | 83 mm | 80% | 2.9 m/s | 2.1 |
| 1996 | 15.9°C | 12.3°C | 8.7°C | 21.3°C | 5.0°C | 31 mm | 83% | 2.7 m/s | 2.2 |
| 1995 | 14.6°C | 11.7°C | 8.8°C | 19.0°C | 6.3°C | 69 mm | 86% | 2.7 m/s | 2.3 |
| 1994 | 15.9°C | 12.5°C | 9.2°C | 21.5°C | 5.2°C | 55 mm | 76% | 4.4 m/s | 2.3 |
| 1993 | 16.7°C | 13.2°C | 9.6°C | 23.8°C | 6.8°C | 40 mm | 78% | 3 m/s | 2.3 |
| 1992 | 15.5°C | 12.4°C | 9.3°C | 22.1°C | 5.2°C | 84 mm | 83% | 2.7 m/s | 2.3 |
| 1991 | 16.5°C | 12.9°C | 9.2°C | 20.5°C | 5.7°C | 27 mm | 81% | 2.3 m/s | 2.4 |
| 1990 | 16.4°C | 12.9°C | 9.4°C | 23.1°C | 5.9°C | 29 mm | 78% | 3.2 m/s | 2.4 |
| 1989 | 16.7°C | 13.5°C | 10.3°C | 20.0°C | 5.5°C | 75 mm | 85% | 2.9 m/s | 2.2 |
| 1988 | 17.4°C | 14.3°C | 11.1°C | 24.8°C | 6.8°C | 87 mm | 83% | 2.7 m/s | 2 |
| 1987 | 16.1°C | 12.6°C | 9.1°C | 21.7°C | 4.7°C | 105 mm | 82% | 3.4 m/s | 2.1 |
| 1986 | 15.7°C | 12.4°C | 9.1°C | 19.6°C | 5.5°C | 92 mm | 84% | 2.8 m/s | 2.2 |
| 1985 | 16.6°C | 12.9°C | 9.2°C | 23.6°C | 4.9°C | 69 mm | 80% | 2.9 m/s | 2.4 |
| 1984 | 16.5°C | 12.5°C | 8.4°C | 21.8°C | 5.5°C | 30 mm | 78% | 2.7 m/s | 2.7 |
| 1983 | 15.9°C | 12.6°C | 9.3°C | 19.2°C | 5.0°C | 99 mm | 86% | 3.1 m/s | — |
| 1982 | 16.0°C | 12.4°C | 8.8°C | 21.0°C | 6.3°C | 74 mm | 76% | 3.8 m/s | — |
| 1981 | 16.4°C | 12.7°C | 9.0°C | 23.4°C | 4.9°C | 101 mm | 79% | 3.1 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 16.4°C with lows near 9.5°C (mean 13°C), based on 45 years of NASA POWER data.
May averages 63 mm of rainfall in Dandenong, about average for rainfall. The wettest on record was 133 mm in 2012.
The hottest May reached 25.1°C in 2013. The coldest dipped to 4.1°C in 2010.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.5°C. Daytime highs moved from 16.3°C to 16.7°C and overnight lows from 8.9°C to 9.5°C over the same span.
May is one of the cooler months of the year in Dandenong and about average for rainfall, so plan for around 16.4°C daytime highs and 9.5°C at night.
Not quite — May is the 5th coolest month in Dandenong, averaging 13°C.
For May in Dandenong, pack light layers you can adjust through the day, with typical highs of 16.4°C and lows of 9.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 80% — quite humid.
Average wind speed in May is 3.1 m/s. The windiest May on record averaged 4.4 m/s (1994).
The wettest May on record was 2012 with 133 mm. On average, May sees 63 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 Dandenong behaves each May, 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 May specifically, along with year-by-year records and how the month has changed over the decades.
