May is one of the cooler months of the year in Caloundra, with average highs near 22°C and lows around 17.3°C (mean 19.7°C). It is a relatively wet time of year, averaging 118 mm of rainfall and 74% relative humidity across the period.
May is one of the cooler months of the year in Caloundra. Across 45 years of records, the warmest May in Caloundra was 2007 — when the month averaged 21.4°C — while the coldest was 2011 at 18.1°C. Typical May days reach 22°C with nights near 17.3°C. The long-term May temperature trend is broadly flat.
May is a relatively wet time of year in Caloundra, averaging 118 mm of rainfall. The wettest May on record was 1996 with 436 mm, while the driest was 2016 at 27 mm.
Relative humidity in Caloundra during May averages 74%. The most humid May was 2022 at 84%, and the least humid was 2023 at 64%.
May receives about 3.5 kWh/m²/day of solar energy in Caloundra. The sunniest May was 2023 at 4.2 kWh/m²/day, and the cloudiest was 2022 at 2.5.
Average wind speed in Caloundra during May is 3.1 m/s. The windiest May was 1996 at 3.9 m/s, while the calmest was 2016 at 2.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.5°C | 19.6°C | 19.8°C | 19.6°C | 19.8°C | +0.3°C |
| Avg High | 21.7°C | 21.7°C | 22.4°C | 22.1°C | 22.2°C | +0.5°C |
| Avg Low | 17.4°C | 17.5°C | 17.1°C | 17.0°C | 17.4°C | 0°C |
| Avg Rain | 138 mm | 170 mm | 99 mm | 76 mm | 101 mm | -37 mm |
May temperatures in Caloundra have risen by about 0.4°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 9°C (2000) to a record high of 27.5°C (2016).
Rainfall in May is a relatively wet time of year, averaging 118 mm, with a wettest year of 436 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows rose 0°C per decade, widening the gap between day and night.
A good time to visit Caloundra
May is a good time to visit Caloundra, with days averaging 22°C and nights around 17.3°C (mean 19.7°C, cooler than Caloundra's yearly average) and higher rainfall. October and April 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 | 22.4°C | 20.3°C | 18.3°C | 25.7°C | 15.3°C | 103 mm | 80% | 3.3 m/s | 3.3 |
| 2024 | 22.6°C | 20.4°C | 18.1°C | 24.1°C | 14.4°C | 63 mm | 76% | 3.2 m/s | 3.4 |
| 2023 | 22.1°C | 18.8°C | 15.5°C | 25.0°C | 11.9°C | 62 mm | 64% | 2.9 m/s | 4.2 |
| 2022 | 22.2°C | 20.7°C | 19.2°C | 25.1°C | 14.7°C | 267 mm | 84% | 3.7 m/s | 2.5 |
| 2021 | 21.7°C | 19.0°C | 16.4°C | 24.7°C | 13.0°C | 73 mm | 76% | 2.9 m/s | 3.7 |
| 2020 | 22.2°C | 19.5°C | 16.8°C | 26.3°C | 10.6°C | 38 mm | 68% | 3.3 m/s | 3.5 |
| 2019 | 22.7°C | 20.0°C | 17.4°C | 25.3°C | 10.9°C | 51 mm | 70% | 2.8 m/s | 3.6 |
| 2018 | 22.7°C | 19.9°C | 17.1°C | 25.5°C | 12.1°C | 94 mm | 70% | 3.1 m/s | 3.8 |
| 2017 | 22.9°C | 20.4°C | 18.0°C | 24.9°C | 14.3°C | 58 mm | 75% | 2.8 m/s | 3.4 |
| 2016 | 24.5°C | 21.3°C | 18.0°C | 27.5°C | 13.0°C | 27 mm | 67% | 2.4 m/s | 4 |
| 2015 | 21.7°C | 19.2°C | 16.6°C | 24.9°C | 11.5°C | 122 mm | 78% | 3 m/s | 3.9 |
| 2014 | 22.3°C | 19.9°C | 17.6°C | 24.9°C | 12.4°C | 65 mm | 72% | 2.8 m/s | 3.6 |
| 2013 | 20.9°C | 18.8°C | 16.6°C | 24.3°C | 12.1°C | 77 mm | 74% | 3.3 m/s | 3.5 |
| 2012 | 21.1°C | 18.6°C | 16.1°C | 23.1°C | 11.1°C | 83 mm | 75% | 2.9 m/s | 3.6 |
| 2011 ❄️ | 20.5°C | 18.1°C | 15.6°C | 23.3°C | 12.2°C | 102 mm | 75% | 2.9 m/s | 3.8 |
| 2010 | 21.8°C | 19.4°C | 17.0°C | 24.5°C | 13.0°C | 78 mm | 74% | 3 m/s | 3.5 |
| 2009 | 21.1°C | 19.1°C | 17.1°C | 22.5°C | 14.0°C | 219 mm | 76% | 3.2 m/s | 3.2 |
| 2008 | 22.1°C | 19.3°C | 16.5°C | 25.4°C | 12.4°C | 94 mm | 69% | 3 m/s | 3.7 |
| 2007 🔥 | 23.9°C | 21.4°C | 19.0°C | 27.3°C | 15.4°C | 82 mm | 72% | 2.7 m/s | 3.9 |
| 2006 | 22.7°C | 19.7°C | 16.6°C | 25.9°C | 11.7°C | 49 mm | 65% | 2.6 m/s | 3.8 |
| 2005 | 22.3°C | 19.7°C | 17.1°C | 26.0°C | 13.1°C | 125 mm | 73% | 3.5 m/s | 3.6 |
| 2004 | 22.9°C | 19.9°C | 16.8°C | 26.5°C | 12.2°C | 30 mm | 65% | 2.8 m/s | 3.6 |
| 2003 | 21.8°C | 19.5°C | 17.1°C | 25.7°C | 12.9°C | 163 mm | 73% | 3.2 m/s | 3.6 |
| 2002 | 22.5°C | 19.8°C | 17.0°C | 25.8°C | 12.5°C | 85 mm | 68% | 3.2 m/s | 3.8 |
| 2001 | 22.6°C | 19.6°C | 16.6°C | 25.1°C | 12.6°C | 46 mm | 70% | 2.9 m/s | 3.8 |
| 2000 | 21.6°C | 19.5°C | 17.4°C | 24.6°C | 9.0°C | 103 mm | 76% | 3.8 m/s | 3.4 |
| 1999 | 21.7°C | 19.8°C | 17.9°C | 23.5°C | 15.1°C | 186 mm | 81% | 3.7 m/s | 3.4 |
| 1998 | 22.3°C | 19.9°C | 17.6°C | 25.2°C | 12.4°C | 162 mm | 75% | 2.9 m/s | 3.4 |
| 1997 | 21.6°C | 19.4°C | 17.2°C | 23.5°C | 12.9°C | 179 mm | 80% | 3.3 m/s | 3.4 |
| 1996 🌧️ | 21.5°C | 19.8°C | 18.1°C | 24.2°C | 13.9°C | 436 mm | 80% | 3.9 m/s | 3.1 |
| 1995 | 22.0°C | 19.8°C | 17.6°C | 25.6°C | 13.1°C | 68 mm | 76% | 3.2 m/s | 3.4 |
| 1994 | 21.5°C | 18.6°C | 15.8°C | 24.4°C | 12.1°C | 104 mm | 72% | 2.7 m/s | 3.8 |
| 1993 | 22.1°C | 20.0°C | 17.9°C | 24.6°C | 14.7°C | 58 mm | 75% | 3 m/s | 3.5 |
| 1992 | 20.7°C | 18.9°C | 17.1°C | 23.4°C | 12.3°C | 143 mm | 81% | 3.1 m/s | 2.9 |
| 1991 | 21.9°C | 20.0°C | 18.1°C | 26.3°C | 15.4°C | 163 mm | 77% | 3.4 m/s | 3.3 |
| 1990 | 21.6°C | 19.5°C | 17.5°C | 23.8°C | 13.5°C | 201 mm | 81% | 2.8 m/s | 3.4 |
| 1989 | 21.7°C | 20.4°C | 19.0°C | 23.7°C | 15.6°C | 217 mm | 81% | 3.4 m/s | 3.1 |
| 1988 | 21.3°C | 19.1°C | 17.0°C | 24.0°C | 13.2°C | 41 mm | 77% | 3.2 m/s | 3.5 |
| 1987 | 21.8°C | 19.5°C | 17.3°C | 25.5°C | 9.1°C | 154 mm | 78% | 3 m/s | 3.3 |
| 1986 | 22.1°C | 19.8°C | 17.4°C | 24.2°C | 13.0°C | 163 mm | 76% | 3.1 m/s | 3.4 |
| 1985 | 21.4°C | 19.4°C | 17.4°C | 24.6°C | 11.5°C | 124 mm | 77% | 3.7 m/s | 3.5 |
| 1984 | 21.3°C | 19.0°C | 16.7°C | 23.5°C | 11.2°C | 56 mm | 70% | 2.9 m/s | 3.5 |
| 1983 | 21.5°C | 19.8°C | 18.1°C | 23.7°C | 12.7°C | 262 mm | 79% | 3.4 m/s | — |
| 1982 | 22.3°C | 19.7°C | 17.1°C | 25.1°C | 12.7°C | 96 mm | 69% | 2.6 m/s | — |
| 1981 | 21.6°C | 19.1°C | 16.7°C | 25.6°C | 13.2°C | 131 mm | 72% | 3.6 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 22°C with lows near 17.3°C (mean 19.7°C), based on 45 years of NASA POWER data.
May averages 118 mm of rainfall in Caloundra, a relatively wet time of year. The wettest on record was 436 mm in 1996.
The hottest May reached 27.5°C in 2016. The coldest dipped to 9°C in 2000.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.4°C. Daytime highs moved from 21.6°C to 22.2°C and overnight lows from 17.2°C to 17.5°C over the same span.
May is one of the cooler months of the year in Caloundra and a relatively wet time of year, so plan for around 22°C daytime highs and 17.3°C at night.
Not quite — May is the 5th coolest month in Caloundra, averaging 19.7°C.
For May in Caloundra, pack light layers you can adjust through the day, with typical highs of 22°C and lows of 17.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 74% — moderately humid.
Average wind speed in May is 3.1 m/s. The windiest May on record averaged 3.9 m/s (1996).
The wettest May on record was 1996 with 436 mm. On average, May sees 118 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 Caloundra 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.
