May is one of the cooler months of the year in Exmouth, with average highs near 28.4°C and lows around 20.7°C (mean 24.5°C). It is a relatively wet time of year, averaging 40 mm of rainfall and 59% relative humidity across the period.
May is one of the cooler months of the year in Exmouth. Across 45 years of records, the warmest May in Exmouth was 1998 — when the month averaged 26.9°C — while the coldest was 2000 at 22.2°C. Typical May days reach 28.4°C with nights near 20.7°C. The long-term May temperature trend is broadly flat.
May is a relatively wet time of year in Exmouth, averaging 40 mm of rainfall. The wettest May on record was 1984 with 186 mm, while the driest were 2017, 2019 and 2023, among others at 0 mm.
Relative humidity in Exmouth during May averages 59%. The most humid May was 2014 at 73%, and the least humid was 1987 at 51%.
May receives about 4.5 kWh/m²/day of solar energy in Exmouth. The sunniest Mays were 2017 and 2019 at 5.1 kWh/m²/day, and the cloudiest was 1992 at 3.6.
Average wind speed in Exmouth during May is 3.8 m/s. The windiest Mays were 1990, 1995 and 2013 at 4.5 m/s, while the calmest was 2005 at 3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 24.6°C | 24.9°C | 24.4°C | 24.1°C | 24.8°C | +0.2°C |
| Avg High | 28.4°C | 28.5°C | 28.4°C | 28.2°C | 28.6°C | +0.2°C |
| Avg Low | 20.8°C | 21.3°C | 20.5°C | 20.0°C | 20.9°C | +0.1°C |
| Avg Rain | 56 mm | 49 mm | 25 mm | 30 mm | 44 mm | -11 mm |
May temperatures in Exmouth have stayed relatively stable across the record.
May has ranged from a record low of 13.5°C (2020) to a record high of 35.7°C (1990).
Rainfall in May is a relatively wet time of year, averaging 40 mm, with a wettest year of 186 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0°C per decade while lows fell 0.2°C per decade, widening the gap between day and night.
A good time to visit Exmouth
May is a good time to visit Exmouth, with days averaging 28.4°C and nights around 20.7°C (mean 24.5°C, cooler than Exmouth's yearly average) and moderate rainfall. September and August 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 | 29.9°C | 25.7°C | 21.5°C | 33.4°C | 16.0°C | 18 mm | 52% | 3.5 m/s | 4.6 |
| 2024 | 29.3°C | 25.3°C | 21.2°C | 32.3°C | 15.5°C | 10 mm | 53% | 3.2 m/s | 4.8 |
| 2023 | 28.4°C | 24.5°C | 20.5°C | 31.2°C | 17.4°C | 0 mm | 53% | 3.3 m/s | 4.6 |
| 2022 | 27.6°C | 24.5°C | 21.4°C | 32.1°C | 17.3°C | 131 mm | 64% | 3.7 m/s | 3.7 |
| 2021 | 28.3°C | 24.5°C | 20.8°C | 31.8°C | 16.9°C | 56 mm | 60% | 3.8 m/s | 4.3 |
| 2020 | 28.3°C | 24.1°C | 19.9°C | 32.5°C | 13.5°C | 50 mm | 51% | 4.1 m/s | 4.6 |
| 2019 | 29.9°C | 24.9°C | 20.0°C | 33.2°C | 16.5°C | 0 mm | 52% | 3.2 m/s | 5.1 |
| 2018 | 28.6°C | 24.3°C | 19.9°C | 32.7°C | 16.1°C | 9 mm | 55% | 4.1 m/s | 4.8 |
| 2017 | 29.2°C | 24.5°C | 19.9°C | 32.0°C | 16.5°C | 0 mm | 56% | 3.5 m/s | 5.1 |
| 2016 | 28.3°C | 24.3°C | 20.3°C | 33.2°C | 16.1°C | 6 mm | 60% | 4 m/s | 4.5 |
| 2015 | 26.3°C | 22.3°C | 18.3°C | 29.5°C | 15.9°C | 65 mm | 69% | 3.9 m/s | 4 |
| 2014 | 26.8°C | 23.5°C | 20.1°C | 29.9°C | 15.2°C | 122 mm | 73% | 3.3 m/s | 4.2 |
| 2013 | 27.5°C | 23.8°C | 20.0°C | 34.6°C | 15.6°C | 71 mm | 61% | 4.5 m/s | 4.2 |
| 2012 | 29.3°C | 24.9°C | 20.5°C | 32.3°C | 16.6°C | 1 mm | 55% | 3.4 m/s | 5 |
| 2011 | 26.9°C | 23.7°C | 20.4°C | 29.8°C | 16.9°C | 18 mm | 63% | 4 m/s | 4.1 |
| 2010 | 29.0°C | 24.9°C | 20.8°C | 35.1°C | 16.2°C | 6 mm | 55% | 4.2 m/s | 4.7 |
| 2009 | 28.2°C | 24.0°C | 19.7°C | 34.2°C | 15.7°C | 3 mm | 52% | 3.4 m/s | 4.7 |
| 2008 | 28.6°C | 24.0°C | 19.5°C | 32.8°C | 15.9°C | 0 mm | 60% | 3.6 m/s | 4.9 |
| 2007 | 28.6°C | 24.4°C | 20.3°C | 31.0°C | 17.9°C | 2 mm | 61% | 3.8 m/s | 4.7 |
| 2006 | 28.1°C | 24.1°C | 20.0°C | 29.9°C | 16.9°C | 45 mm | 61% | 3.3 m/s | 4.2 |
| 2005 | 29.1°C | 25.7°C | 22.3°C | 32.6°C | 18.6°C | 81 mm | 68% | 3 m/s | 4.2 |
| 2004 | 27.1°C | 23.3°C | 19.6°C | 31.1°C | 16.4°C | 23 mm | 58% | 4.3 m/s | 4.7 |
| 2003 | 29.2°C | 25.5°C | 21.7°C | 32.4°C | 17.5°C | 4 mm | 59% | 3.4 m/s | 4.5 |
| 2002 | 29.5°C | 26.0°C | 22.6°C | 34.3°C | 15.9°C | 87 mm | 66% | 3.2 m/s | 4.5 |
| 2001 | 28.8°C | 24.8°C | 20.9°C | 33.5°C | 16.8°C | 7 mm | 57% | 3.9 m/s | 4.4 |
| 2000 ❄️ | 26.3°C | 22.2°C | 18.1°C | 28.2°C | 14.5°C | 0 mm | 58% | 4.4 m/s | 4.7 |
| 1999 | 27.9°C | 25.1°C | 22.2°C | 30.6°C | 19.7°C | 99 mm | 68% | 3.6 m/s | 4.2 |
| 1998 🔥 | 30.2°C | 26.9°C | 23.6°C | 35.1°C | 19.5°C | 141 mm | 66% | 3.5 m/s | 3.9 |
| 1997 | 27.2°C | 24.4°C | 21.6°C | 30.4°C | 17.9°C | 47 mm | 66% | 4.2 m/s | 3.8 |
| 1996 | 29.3°C | 25.1°C | 21.0°C | 32.5°C | 17.5°C | 1 mm | 56% | 3.5 m/s | 4.9 |
| 1995 | 27.5°C | 23.8°C | 20.1°C | 29.6°C | 15.7°C | 10 mm | 60% | 4.5 m/s | 4.5 |
| 1994 | 29.9°C | 25.4°C | 21.0°C | 33.6°C | 17.2°C | 3 mm | 52% | 3.5 m/s | 5 |
| 1993 | 27.4°C | 24.2°C | 21.0°C | 30.4°C | 15.7°C | 30 mm | 61% | 4.2 m/s | 4.2 |
| 1992 | 26.6°C | 23.3°C | 20.0°C | 29.5°C | 16.1°C | 142 mm | 66% | 3.8 m/s | 3.6 |
| 1991 | 29.3°C | 25.9°C | 22.5°C | 32.3°C | 19.6°C | 19 mm | 60% | 3.4 m/s | 4.5 |
| 1990 | 29.3°C | 24.9°C | 20.5°C | 35.7°C | 16.3°C | 1 mm | 54% | 4.5 m/s | 4.7 |
| 1989 | 29.0°C | 25.4°C | 21.8°C | 31.6°C | 18.7°C | 75 mm | 57% | 3.4 m/s | 4.6 |
| 1988 | 27.2°C | 23.8°C | 20.4°C | 29.6°C | 17.1°C | 74 mm | 61% | 4.2 m/s | 4.3 |
| 1987 | 27.9°C | 23.8°C | 19.7°C | 33.2°C | 16.0°C | 12 mm | 51% | 4.2 m/s | 4.1 |
| 1986 | 27.6°C | 23.4°C | 19.1°C | 30.2°C | 16.1°C | 10 mm | 53% | 4.2 m/s | 4.7 |
| 1985 | 28.3°C | 24.1°C | 20.0°C | 32.3°C | 18.2°C | 39 mm | 55% | 3.5 m/s | 4.5 |
| 1984 🌧️ | 28.1°C | 24.9°C | 21.8°C | 33.0°C | 15.9°C | 186 mm | 68% | 4 m/s | 3.8 |
| 1983 | 30.3°C | 26.2°C | 22.2°C | 32.9°C | 17.5°C | 4 mm | 55% | 3.2 m/s | — |
| 1982 | 28.9°C | 25.0°C | 21.0°C | 33.2°C | 14.5°C | 65 mm | 59% | 4.1 m/s | — |
| 1981 | 28.7°C | 25.0°C | 21.4°C | 33.5°C | 17.2°C | 34 mm | 56% | 3.6 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 28.4°C with lows near 20.7°C (mean 24.5°C), based on 45 years of NASA POWER data.
May averages 40 mm of rainfall in Exmouth, a relatively wet time of year. The wettest on record was 186 mm in 1984.
The hottest May reached 35.7°C in 1990. The coldest dipped to 13.5°C in 2020.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have fallen by about 0.1°C. Daytime highs moved from 28.9°C to 28.7°C and overnight lows from 21.3°C to 21.1°C over the same span.
May is one of the cooler months of the year in Exmouth and a relatively wet time of year, so plan for around 28.4°C daytime highs and 20.7°C at night.
Not quite — May is the 5th coolest month in Exmouth, averaging 24.5°C.
For May in Exmouth, pack light layers you can adjust through the day, with typical highs of 28.4°C and lows of 20.7°C.
Relative humidity in May averages 59% — moderately humid.
Average wind speed in May is 3.8 m/s. The windiest May on record averaged 4.5 m/s (1990).
The wettest May on record was 1984 with 186 mm. On average, May sees 40 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 Exmouth 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.
