May is one of the cooler months of the year in Adelaide River, with average highs near 32.3°C and lows around 19.7°C (mean 26°C). It is one of the drier months, averaging 15 mm of rainfall and 67% relative humidity across the period.
May is one of the cooler months of the year in Adelaide River. Across 45 years of records, the warmest May in Adelaide River was 2016 — when the month averaged 30°C — while the coldest was 2011 at 21.5°C. Typical May days reach 32.3°C with nights near 19.7°C. The long-term trend is warming, about 0.2°C per decade.
May is one of the drier months in Adelaide River, averaging 15 mm of rainfall. The wettest May on record was 1990 with 86 mm, while the driest were 1999, 2008 and 2021, among others at 0 mm.
Relative humidity in Adelaide River during May averages 67%. The most humid May was 2006 at 83%, and the least humid was 2018 at 50%.
May receives about 5.5 kWh/m²/day of solar energy in Adelaide River. The sunniest May was 1999 at 6 kWh/m²/day, and the cloudiest were 2004 and 2010 at 4.8.
Average wind speed in Adelaide River during May is 2.3 m/s. The windiest May was 2000 at 2.9 m/s, while the calmest were 1986, 1989 and 1997 at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 26.0°C | 25.9°C | 25.5°C | 26.5°C | 26.2°C | +0.2°C |
| Avg High | 32.2°C | 32.4°C | 31.8°C | 32.7°C | 32.8°C | +0.6°C |
| Avg Low | 19.8°C | 19.3°C | 19.2°C | 20.4°C | 19.7°C | -0.1°C |
| Avg Rain | 11 mm | 16 mm | 13 mm | 27 mm | 3 mm | -8 mm |
May temperatures in Adelaide River have risen by about 0.4°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 9.3°C (2006) to a record high of 37.8°C (2016).
Rainfall in May is one of the drier months, averaging 15 mm, with a wettest year of 86 mm.
One of the best times to visit Adelaide River
May is one of the best times to visit Adelaide River. Expect days averaging 32.3°C and nights around 19.7°C (mean 26°C) — cooler than Adelaide River's yearly average — with low rainfall (15 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 30.3°C | 25.1°C | 19.9°C | 32.5°C | 12.5°C | 10 mm | 78% | 2.5 m/s | 5.2 |
| 2024 | 32.7°C | 26.8°C | 20.8°C | 35.5°C | 15.2°C | 1 mm | 71% | 2.7 m/s | 5.5 |
| 2023 | 32.6°C | 25.0°C | 17.4°C | 34.8°C | 13.1°C | 1 mm | 56% | 2.5 m/s | 5.7 |
| 2022 | 34.4°C | 27.8°C | 21.3°C | 35.8°C | 17.8°C | 1 mm | 64% | 1.9 m/s | 5.4 |
| 2021 | 31.6°C | 24.9°C | 18.2°C | 33.9°C | 14.2°C | 0 mm | 69% | 2.4 m/s | 5.9 |
| 2020 | 34.9°C | 27.8°C | 20.6°C | 37.7°C | 17.0°C | 3 mm | 50% | 2.7 m/s | 5.4 |
| 2019 | 35.2°C | 28.3°C | 21.5°C | 37.4°C | 17.9°C | 14 mm | 51% | 2.7 m/s | 5.3 |
| 2018 | 34.7°C | 27.2°C | 19.7°C | 36.1°C | 14.8°C | 1 mm | 50% | 2.8 m/s | 5.8 |
| 2017 | 35.3°C | 28.2°C | 21.1°C | 37.3°C | 17.4°C | 1 mm | 56% | 2.3 m/s | 5.6 |
| 2016 🔥 | 36.1°C | 30.0°C | 24.0°C | 37.8°C | 20.0°C | 43 mm | 60% | 2 m/s | 5.2 |
| 2015 | 34.1°C | 26.4°C | 18.8°C | 36.9°C | 12.6°C | 4 mm | 56% | 2.2 m/s | 5.7 |
| 2014 | 32.6°C | 26.9°C | 21.2°C | 34.8°C | 17.0°C | 28 mm | 69% | 1.9 m/s | 5.4 |
| 2013 | 30.8°C | 26.0°C | 21.2°C | 32.7°C | 13.2°C | 73 mm | 78% | 2.1 m/s | 5.2 |
| 2012 | 30.2°C | 24.5°C | 18.8°C | 32.7°C | 13.7°C | 23 mm | 68% | 2.6 m/s | 5.2 |
| 2011 ❄️ | 27.3°C | 21.5°C | 15.7°C | 29.6°C | 10.5°C | 2 mm | 79% | 2.6 m/s | 5.8 |
| 2010 | 30.6°C | 26.2°C | 21.8°C | 32.3°C | 17.7°C | 81 mm | 81% | 2.2 m/s | 4.8 |
| 2009 | 34.1°C | 27.3°C | 20.6°C | 36.3°C | 14.6°C | 6 mm | 58% | 2.4 m/s | 5.2 |
| 2008 | 31.6°C | 24.4°C | 17.1°C | 33.8°C | 13.1°C | 0 mm | 62% | 2.5 m/s | 5.8 |
| 2007 | 32.1°C | 26.5°C | 20.9°C | 33.9°C | 16.4°C | 39 mm | 76% | 2.2 m/s | 5.4 |
| 2006 | 27.1°C | 22.1°C | 17.1°C | 29.2°C | 9.3°C | 5 mm | 83% | 2.6 m/s | 5.8 |
| 2005 | 33.9°C | 26.3°C | 18.8°C | 35.6°C | 13.8°C | 0 mm | 56% | 2.4 m/s | 5.8 |
| 2004 | 31.7°C | 26.3°C | 21.0°C | 35.0°C | 14.0°C | 55 mm | 75% | 2.3 m/s | 4.8 |
| 2003 | 35.0°C | 27.9°C | 20.8°C | 36.3°C | 15.5°C | 1 mm | 54% | 2.4 m/s | 5.5 |
| 2002 | 34.7°C | 27.5°C | 20.3°C | 36.6°C | 13.4°C | 8 mm | 57% | 2.1 m/s | 5.7 |
| 2001 | 29.7°C | 23.0°C | 16.3°C | 31.3°C | 10.4°C | 4 mm | 71% | 2.3 m/s | 5.6 |
| 2000 | 28.4°C | 23.5°C | 18.7°C | 30.6°C | 10.5°C | 9 mm | 81% | 2.9 m/s | 5.3 |
| 1999 | 28.9°C | 22.3°C | 15.6°C | 32.8°C | 10.7°C | 0 mm | 76% | 2.3 m/s | 6 |
| 1998 | 33.6°C | 27.0°C | 20.5°C | 35.7°C | 13.5°C | 1 mm | 66% | 2.4 m/s | 5.3 |
| 1997 | 34.4°C | 27.3°C | 20.3°C | 35.5°C | 14.5°C | 17 mm | 59% | 1.8 m/s | 5.5 |
| 1996 | 31.6°C | 24.8°C | 18.0°C | 34.4°C | 13.4°C | 0 mm | 65% | 2.2 m/s | 5.6 |
| 1995 | 30.1°C | 24.7°C | 19.4°C | 32.9°C | 13.3°C | 30 mm | 75% | 2.1 m/s | 5.6 |
| 1994 | 33.6°C | 26.1°C | 18.6°C | 35.5°C | 13.0°C | 4 mm | 58% | 2.4 m/s | 5.8 |
| 1993 | 34.2°C | 27.6°C | 20.9°C | 35.6°C | 17.8°C | 9 mm | 62% | 2.6 m/s | 5.5 |
| 1992 | 33.7°C | 27.7°C | 21.7°C | 35.5°C | 17.0°C | 18 mm | 70% | 2 m/s | 5.4 |
| 1991 | 32.0°C | 25.2°C | 18.3°C | 34.6°C | 14.1°C | 1 mm | 65% | 2.3 m/s | 5.8 |
| 1990 🌧️ | 31.8°C | 25.9°C | 20.0°C | 34.8°C | 11.1°C | 86 mm | 71% | 2.2 m/s | 5.5 |
| 1989 | 29.9°C | 24.5°C | 19.0°C | 31.5°C | 14.5°C | 0 mm | 77% | 1.8 m/s | 5.8 |
| 1988 | 34.8°C | 28.3°C | 21.8°C | 37.2°C | 18.3°C | 5 mm | 67% | 1.9 m/s | 5.6 |
| 1987 | 34.7°C | 27.7°C | 20.7°C | 36.7°C | 15.1°C | 46 mm | 61% | 2.3 m/s | 5.5 |
| 1986 | 31.9°C | 26.0°C | 20.2°C | 34.2°C | 16.9°C | 34 mm | 73% | 1.8 m/s | 5.8 |
| 1985 | 30.3°C | 25.0°C | 19.7°C | 32.9°C | 16.6°C | 1 mm | 76% | 2.4 m/s | 5.8 |
| 1984 | 31.8°C | 26.0°C | 20.3°C | 34.2°C | 18.2°C | 2 mm | 73% | 2.5 m/s | 5.6 |
| 1983 | 30.1°C | 24.3°C | 18.5°C | 32.3°C | 12.7°C | 3 mm | 74% | 2.3 m/s | — |
| 1982 | 33.2°C | 25.8°C | 18.5°C | 35.4°C | 12.9°C | 1 mm | 59% | 2.4 m/s | — |
| 1981 | 33.1°C | 26.3°C | 19.6°C | 35.5°C | 16.5°C | 4 mm | 64% | 2.2 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 32.3°C with lows near 19.7°C (mean 26°C), based on 45 years of NASA POWER data.
May averages 15 mm of rainfall in Adelaide River, one of the drier months. The wettest on record was 86 mm in 1990.
The hottest May reached 37.8°C in 2016. The coldest dipped to 9.3°C in 2006.
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 31.7°C to 32.3°C and overnight lows from 19.3°C to 19.5°C over the same span.
May is one of the cooler months of the year in Adelaide River and one of the drier months, so plan for around 32.3°C daytime highs and 19.7°C at night.
Not quite — May is the 2nd coolest month in Adelaide River, averaging 26°C.
For May in Adelaide River, pack light, breathable clothing and sun protection, with typical highs of 32.3°C and lows of 19.7°C.
Relative humidity in May averages 67% — moderately humid.
Average wind speed in May is 2.3 m/s. The windiest May on record averaged 2.9 m/s (2000).
The wettest May on record was 1990 with 86 mm. On average, May sees 15 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 Adelaide River 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.
