May is one of the cooler months of the year in Ballarat, with average highs near 14.5°C and lows around 5.7°C (mean 10.1°C). It is about average for rainfall, averaging 50 mm of rainfall and 82% relative humidity across the period.
May is one of the cooler months of the year in Ballarat. Across 45 years of records, the warmest Mays in Ballarat were 1988 and 2007 — when the month averaged 11.8°C — while the coldest were 2011 and 2020 at 8.8°C. Typical May days reach 14.5°C with nights near 5.7°C. The long-term May temperature trend is broadly flat.
May is about average for rainfall in Ballarat, averaging 50 mm of rainfall. The wettest May on record was 1983 with 104 mm, while the driest was 2025 at 10 mm.
Relative humidity in Ballarat during May averages 82%. The most humid May was 1983 at 89%, and the least humid was 2025 at 74%.
May receives about 2.4 kWh/m²/day of solar energy in Ballarat. The sunniest May was 2025 at 2.9 kWh/m²/day, and the cloudiest were 1988 and 1997 at 2.1.
Average wind speed in Ballarat during May is 2.5 m/s. The windiest May was 2016 at 3.4 m/s, while the calmest were 2001, 2008 and 2024, among others at 1.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.1°C | 9.9°C | 10.4°C | 10.2°C | 10.0°C | -0.1°C |
| Avg High | 14.4°C | 14.4°C | 14.8°C | 14.5°C | 14.7°C | +0.3°C |
| Avg Low | 5.8°C | 5.5°C | 5.9°C | 5.9°C | 5.3°C | -0.5°C |
| Avg Rain | 74 mm | 44 mm | 41 mm | 54 mm | 31 mm | -43 mm |
May temperatures in Ballarat have risen by about 0.3°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -0.8°C (2016) to a record high of 24.9°C (1988).
Rainfall in May is about average for rainfall, averaging 50 mm, with a wettest year of 104 mm.
A good time to visit Ballarat
May is a good time to visit Ballarat, with days averaging 14.5°C and nights around 5.7°C (mean 10.1°C, cooler than Ballarat'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 | 16.6°C | 11.1°C | 5.6°C | 22.1°C | 0.3°C | 10 mm | 74% | 2.3 m/s | 2.9 |
| 2024 | 16.1°C | 11.0°C | 5.9°C | 19.7°C | 1.4°C | 25 mm | 80% | 1.9 m/s | 2.7 |
| 2023 | 13.6°C | 9.3°C | 4.9°C | 18.9°C | 2.0°C | 34 mm | 83% | 2.5 m/s | 2.3 |
| 2022 | 14.4°C | 10.0°C | 5.6°C | 19.1°C | 2.4°C | 32 mm | 85% | 2.2 m/s | 2.3 |
| 2021 | 14.7°C | 9.8°C | 5.0°C | 22.0°C | -0.1°C | 53 mm | 80% | 2.6 m/s | 2.5 |
| 2020 | 12.7°C | 8.8°C | 4.9°C | 17.5°C | 0.5°C | 31 mm | 85% | 2.9 m/s | 2.6 |
| 2019 | 14.8°C | 10.3°C | 5.9°C | 19.9°C | 3.0°C | 84 mm | 82% | 2.9 m/s | 2.4 |
| 2018 | 14.4°C | 10.3°C | 6.3°C | 23.0°C | 2.5°C | 58 mm | 80% | 2.9 m/s | 2.2 |
| 2017 | 14.2°C | 9.8°C | 5.3°C | 17.7°C | 1.2°C | 34 mm | 84% | 2.3 m/s | 2.4 |
| 2016 | 15.4°C | 11.0°C | 6.7°C | 23.0°C | -0.8°C | 55 mm | 79% | 3.4 m/s | 2.4 |
| 2015 | 13.9°C | 9.8°C | 5.7°C | 19.7°C | 2.1°C | 58 mm | 84% | 3.2 m/s | 2.4 |
| 2014 | 15.8°C | 11.4°C | 7.0°C | 21.1°C | 1.0°C | 36 mm | 84% | 2.4 m/s | 2.3 |
| 2013 | 15.0°C | 10.5°C | 6.0°C | 23.4°C | 2.4°C | 47 mm | 79% | 2.5 m/s | 2.4 |
| 2012 | 14.0°C | 9.6°C | 5.3°C | 20.1°C | 0.8°C | 68 mm | 83% | 2.6 m/s | 2.4 |
| 2011 ❄️ | 12.7°C | 8.8°C | 4.9°C | 19.2°C | 1.3°C | 52 mm | 86% | 2.2 m/s | 2.2 |
| 2010 | 14.7°C | 10.5°C | 6.2°C | 18.8°C | 0.6°C | 46 mm | 84% | 2.2 m/s | 2.4 |
| 2009 | 15.2°C | 10.7°C | 6.3°C | 18.8°C | 3.4°C | 25 mm | 84% | 2.2 m/s | 2.3 |
| 2008 | 14.5°C | 9.8°C | 5.1°C | 19.0°C | 2.0°C | 41 mm | 83% | 1.9 m/s | 2.3 |
| 2007 | 15.8°C | 11.8°C | 7.7°C | 20.2°C | 4.3°C | 84 mm | 82% | 3.2 m/s | 2.3 |
| 2006 | 13.4°C | 9.1°C | 4.8°C | 18.0°C | 1.5°C | 41 mm | 86% | 2.4 m/s | 2.2 |
| 2005 | 16.0°C | 10.9°C | 5.9°C | 22.1°C | 1.7°C | 14 mm | 76% | 2.2 m/s | 2.7 |
| 2004 | 14.0°C | 9.3°C | 4.6°C | 18.6°C | 0.8°C | 37 mm | 83% | 2.7 m/s | 2.4 |
| 2003 | 16.1°C | 11.2°C | 6.3°C | 21.9°C | 1.5°C | 33 mm | 78% | 2 m/s | 2.6 |
| 2002 | 15.9°C | 11.4°C | 6.9°C | 24.2°C | 3.7°C | 38 mm | 78% | 2.3 m/s | 2.4 |
| 2001 | 14.0°C | 10.1°C | 6.2°C | 19.1°C | 3.7°C | 19 mm | 85% | 1.9 m/s | 2.3 |
| 2000 | 13.3°C | 9.4°C | 5.4°C | 18.6°C | 0.6°C | 84 mm | 85% | 2.8 m/s | 2.4 |
| 1999 | 15.3°C | 10.5°C | 5.7°C | 21.3°C | -0.5°C | 62 mm | 77% | 2.8 m/s | 2.3 |
| 1998 | 14.6°C | 10.1°C | 5.6°C | 20.2°C | 0.8°C | 26 mm | 83% | 2.4 m/s | 2.3 |
| 1997 | 14.0°C | 9.8°C | 5.7°C | 22.3°C | -0.5°C | 70 mm | 84% | 2.3 m/s | 2.1 |
| 1996 | 14.6°C | 9.7°C | 4.9°C | 21.3°C | 1.2°C | 26 mm | 84% | 2 m/s | 2.3 |
| 1995 | 12.8°C | 9.2°C | 5.6°C | 18.3°C | 1.8°C | 56 mm | 88% | 2.3 m/s | 2.3 |
| 1994 | 13.8°C | 9.6°C | 5.3°C | 20.5°C | 0.8°C | 49 mm | 79% | 3.3 m/s | 2.3 |
| 1993 | 15.1°C | 10.4°C | 5.6°C | 22.8°C | 2.4°C | 37 mm | 80% | 2.2 m/s | 2.5 |
| 1992 | 13.5°C | 9.5°C | 5.6°C | 19.4°C | 0.7°C | 83 mm | 86% | 2.1 m/s | 2.3 |
| 1991 | 15.1°C | 10.4°C | 5.7°C | 19.8°C | 2.5°C | 14 mm | 82% | 1.9 m/s | 2.5 |
| 1990 | 14.7°C | 10.0°C | 5.2°C | 22.3°C | 0.8°C | 18 mm | 81% | 2.5 m/s | 2.5 |
| 1989 | 14.3°C | 10.5°C | 6.7°C | 19.1°C | 1.7°C | 76 mm | 89% | 2.4 m/s | 2.3 |
| 1988 🔥 | 15.7°C | 11.8°C | 7.9°C | 24.9°C | 2.8°C | 102 mm | 85% | 2.1 m/s | 2.1 |
| 1987 | 13.7°C | 9.6°C | 5.6°C | 19.6°C | -0.5°C | 99 mm | 85% | 2.8 m/s | 2.2 |
| 1986 | 13.9°C | 9.7°C | 5.5°C | 18.4°C | 2.3°C | 81 mm | 87% | 2.2 m/s | 2.3 |
| 1985 | 14.9°C | 10.3°C | 5.8°C | 22.8°C | 0.4°C | 50 mm | 80% | 2.3 m/s | 2.6 |
| 1984 | 14.9°C | 9.8°C | 4.8°C | 20.8°C | 1.2°C | 26 mm | 80% | 2.2 m/s | 2.6 |
| 1983 🌧️ | 13.7°C | 9.9°C | 6.0°C | 17.9°C | 0.6°C | 104 mm | 89% | 2.6 m/s | — |
| 1982 | 14.0°C | 9.4°C | 4.7°C | 19.7°C | 1.3°C | 42 mm | 77% | 2.9 m/s | — |
| 1981 | 14.4°C | 9.9°C | 5.4°C | 22.8°C | -0.5°C | 84 mm | 80% | 2.5 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 14.5°C with lows near 5.7°C (mean 10.1°C), based on 45 years of NASA POWER data.
May averages 50 mm of rainfall in Ballarat, about average for rainfall. The wettest on record was 104 mm in 1983.
The hottest May reached 24.9°C in 1988. The coldest dipped to -0.8°C in 2016.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.3°C. Daytime highs moved from 14.4°C to 15.1°C and overnight lows from 5.3°C to 5.4°C over the same span.
May is one of the cooler months of the year in Ballarat and about average for rainfall, so plan for around 14.5°C daytime highs and 5.7°C at night.
Not quite — May is the 5th coolest month in Ballarat, averaging 10.1°C.
For May in Ballarat, pack warm layers and a jacket for chilly mornings, with typical highs of 14.5°C and lows of 5.7°C.
Relative humidity in May averages 82% — quite humid.
Average wind speed in May is 2.5 m/s. The windiest May on record averaged 3.4 m/s (2016).
The wettest May on record was 1983 with 104 mm. On average, May sees 50 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 Ballarat 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.
