May is one of the cooler months of the year in Morwell, with average highs near 15°C and lows around 7.1°C (mean 11.1°C). It is about average for rainfall, averaging 76 mm of rainfall and 82% relative humidity across the period.
May is one of the cooler months of the year in Morwell. Across 45 years of records, the warmest May in Morwell was 2007 — when the month averaged 13.4°C — while the coldest was 2011 at 9.4°C. Typical May days reach 15°C with nights near 7.1°C. The long-term trend is warming, about 0.2°C per decade.
May is about average for rainfall in Morwell, averaging 76 mm of rainfall. The wettest May on record was 2000 with 165 mm, while the driest was 2025 at 24 mm.
Relative humidity in Morwell during May averages 82%. The most humid May was 1983 at 90%, and the least humid was 2025 at 71%.
May receives about 2.2 kWh/m²/day of solar energy in Morwell. The sunniest May was 2025 at 2.6 kWh/m²/day, and the cloudiest was 1997 at 1.9.
Average wind speed in Morwell during May is 0.1 m/s. The windiest May was 1991 at 0.2 m/s, while the calmest was 2016 at 0 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.9°C | 10.8°C | 11.2°C | 11.2°C | 11.2°C | +0.3°C |
| Avg High | 14.6°C | 14.8°C | 15.2°C | 15.0°C | 15.4°C | +0.8°C |
| Avg Low | 7.1°C | 6.9°C | 7.3°C | 7.4°C | 7.0°C | -0.1°C |
| Avg Rain | 103 mm | 68 mm | 72 mm | 82 mm | 43 mm | -61 mm |
May temperatures in Morwell have risen by about 0.8°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 0°C (2021) to a record high of 25.5°C (1997).
Rainfall in May is about average for rainfall, averaging 76 mm, with a wettest year of 165 mm.
A good time to visit Morwell
May is a good time to visit Morwell, with days averaging 15°C and nights around 7.1°C (mean 11.1°C, cooler than Morwell'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 | 17.5°C | 12.7°C | 7.8°C | 23.8°C | 2.2°C | 24 mm | 71% | 0.1 m/s | 2.6 |
| 2024 | 16.4°C | 11.7°C | 7.0°C | 20.0°C | 3.3°C | 26 mm | 79% | 0.1 m/s | 2.5 |
| 2023 | 13.9°C | 10.3°C | 6.6°C | 19.7°C | 4.0°C | 60 mm | 81% | 0.1 m/s | 2.2 |
| 2022 | 15.6°C | 11.3°C | 7.1°C | 20.0°C | 3.3°C | 34 mm | 81% | 0.1 m/s | 2.3 |
| 2021 | 15.4°C | 11.2°C | 6.9°C | 22.7°C | 0.0°C | 60 mm | 78% | 0.1 m/s | 2.3 |
| 2020 | 13.4°C | 9.9°C | 6.3°C | 17.9°C | 3.1°C | 52 mm | 84% | 0.1 m/s | 2.3 |
| 2019 | 15.9°C | 11.9°C | 7.8°C | 22.3°C | 4.1°C | 82 mm | 77% | 0.1 m/s | 2.2 |
| 2018 | 15.8°C | 11.8°C | 7.9°C | 24.4°C | 4.0°C | 53 mm | 75% | 0.1 m/s | 2.1 |
| 2017 | 15.9°C | 11.4°C | 6.9°C | 20.4°C | 3.5°C | 35 mm | 79% | 0.1 m/s | 2.4 |
| 2016 | 16.2°C | 12.4°C | 8.5°C | 24.1°C | 2.4°C | 67 mm | 73% | 0 m/s | 2.2 |
| 2015 | 14.4°C | 10.6°C | 6.8°C | 20.5°C | 2.8°C | 95 mm | 82% | 0.1 m/s | 2.2 |
| 2014 | 16.1°C | 12.3°C | 8.6°C | 21.5°C | 2.1°C | 79 mm | 82% | 0.1 m/s | 2.1 |
| 2013 | 15.2°C | 11.2°C | 7.2°C | 24.4°C | 2.0°C | 87 mm | 80% | 0.1 m/s | 2.2 |
| 2012 | 13.2°C | 10.0°C | 6.9°C | 19.3°C | 2.9°C | 144 mm | 85% | 0.1 m/s | 2.2 |
| 2011 ❄️ | 12.5°C | 9.4°C | 6.4°C | 18.1°C | 1.8°C | 100 mm | 90% | 0.1 m/s | 2 |
| 2010 | 15.2°C | 11.2°C | 7.2°C | 21.3°C | 2.3°C | 82 mm | 85% | 0.1 m/s | 2.2 |
| 2009 | 15.3°C | 11.1°C | 7.0°C | 20.3°C | 4.1°C | 32 mm | 82% | 0.1 m/s | 2.2 |
| 2008 | 15.5°C | 11.3°C | 7.0°C | 19.8°C | 1.8°C | 59 mm | 81% | 0.1 m/s | 2.1 |
| 2007 🔥 | 17.3°C | 13.4°C | 9.5°C | 21.8°C | 6.1°C | 100 mm | 75% | 0.1 m/s | 2.1 |
| 2006 | 13.1°C | 9.7°C | 6.3°C | 17.6°C | 2.6°C | 91 mm | 89% | 0.1 m/s | 2.1 |
| 2005 | 16.4°C | 11.9°C | 7.5°C | 23.5°C | 4.1°C | 30 mm | 75% | 0.1 m/s | 2.3 |
| 2004 | 13.6°C | 10.1°C | 6.6°C | 18.8°C | 2.8°C | 74 mm | 84% | 0.1 m/s | 2 |
| 2003 | 16.3°C | 11.9°C | 7.4°C | 21.9°C | 3.5°C | 54 mm | 80% | 0.1 m/s | 2.5 |
| 2002 | 15.9°C | 11.6°C | 7.3°C | 23.1°C | 1.5°C | 84 mm | 79% | 0.1 m/s | 2.3 |
| 2001 | 14.1°C | 10.7°C | 7.2°C | 19.6°C | 4.4°C | 30 mm | 87% | 0.1 m/s | 2.1 |
| 2000 🌧️ | 14.0°C | 10.3°C | 6.7°C | 21.0°C | 2.6°C | 165 mm | 84% | 0.1 m/s | 2.1 |
| 1999 | 16.4°C | 11.9°C | 7.4°C | 21.5°C | 0.6°C | 83 mm | 75% | 0.1 m/s | 2.2 |
| 1998 | 15.1°C | 11.5°C | 7.9°C | 21.7°C | 4.4°C | 76 mm | 80% | 0.1 m/s | 2.1 |
| 1997 | 15.2°C | 11.2°C | 7.1°C | 25.5°C | 2.4°C | 91 mm | 80% | 0.1 m/s | 1.9 |
| 1996 | 14.0°C | 10.3°C | 6.5°C | 20.4°C | 2.8°C | 41 mm | 86% | 0.1 m/s | 2.1 |
| 1995 | 13.7°C | 10.1°C | 6.5°C | 19.1°C | 3.9°C | 100 mm | 89% | 0.1 m/s | 2.2 |
| 1994 | 14.1°C | 10.5°C | 6.8°C | 20.6°C | 1.7°C | 75 mm | 76% | 0.1 m/s | 2.2 |
| 1993 | 15.4°C | 11.0°C | 6.6°C | 22.2°C | 1.3°C | 51 mm | 80% | 0.1 m/s | 2.1 |
| 1992 | 14.2°C | 10.5°C | 6.7°C | 22.1°C | 2.8°C | 75 mm | 85% | 0.1 m/s | 2.3 |
| 1991 | 15.4°C | 11.1°C | 6.7°C | 22.0°C | 4.3°C | 36 mm | 81% | 0.2 m/s | 2.2 |
| 1990 | 14.0°C | 10.3°C | 6.6°C | 19.3°C | 1.9°C | 48 mm | 85% | 0.1 m/s | 2.3 |
| 1989 | 15.3°C | 11.7°C | 8.0°C | 20.8°C | 2.0°C | 97 mm | 88% | 0.1 m/s | 2.2 |
| 1988 | 15.7°C | 12.1°C | 8.5°C | 24.6°C | 4.0°C | 117 mm | 88% | 0.1 m/s | 2 |
| 1987 | 14.5°C | 10.7°C | 6.9°C | 21.8°C | 2.6°C | 102 mm | 84% | 0.1 m/s | 2.1 |
| 1986 | 14.1°C | 10.4°C | 6.8°C | 19.2°C | 3.0°C | 107 mm | 87% | 0.1 m/s | 2.2 |
| 1985 | 14.7°C | 10.8°C | 7.0°C | 21.6°C | 2.0°C | 88 mm | 84% | 0.1 m/s | 2.4 |
| 1984 | 14.9°C | 10.6°C | 6.2°C | 19.8°C | 2.6°C | 36 mm | 81% | 0.1 m/s | 2.5 |
| 1983 | 14.0°C | 10.6°C | 7.2°C | 18.4°C | 1.3°C | 145 mm | 90% | 0.1 m/s | — |
| 1982 | 13.8°C | 10.1°C | 6.4°C | 18.9°C | 3.6°C | 108 mm | 82% | 0.1 m/s | — |
| 1981 | 14.7°C | 10.7°C | 6.6°C | 21.8°C | 1.0°C | 130 mm | 82% | 0.1 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 15°C with lows near 7.1°C (mean 11.1°C), based on 45 years of NASA POWER data.
May averages 76 mm of rainfall in Morwell, about average for rainfall. The wettest on record was 165 mm in 2000.
The hottest May reached 25.5°C in 1997. The coldest dipped to 0°C in 2021.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.8°C. Daytime highs moved from 14.4°C to 15.8°C and overnight lows from 6.7°C to 7.1°C over the same span.
May is one of the cooler months of the year in Morwell and about average for rainfall, so plan for around 15°C daytime highs and 7.1°C at night.
Not quite — May is the 5th coolest month in Morwell, averaging 11.1°C.
For May in Morwell, pack warm layers and a jacket for chilly mornings, with typical highs of 15°C and lows of 7.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 82% — quite humid.
Average wind speed in May is 0.1 m/s. The windiest May on record averaged 0.2 m/s (1991).
The wettest May on record was 2000 with 165 mm. On average, May sees 76 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 Morwell 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.
