May is one of the cooler months of the year in Kalbarri, with average highs near 26°C and lows around 14.8°C (mean 20.4°C). It is a relatively wet time of year, averaging 44 mm of rainfall and 57% relative humidity across the period.
May is one of the cooler months of the year in Kalbarri. Across 45 years of records, the warmest May in Kalbarri was 2025 — when the month averaged 22.6°C — while the coldest was 1992 at 18.4°C. Typical May days reach 26°C with nights near 14.8°C. The long-term trend is warming, about 0.2°C per decade.
May is a relatively wet time of year in Kalbarri, averaging 44 mm of rainfall. The wettest May on record was 1999 with 204 mm, while the driest was 2019 at 1 mm.
Relative humidity in Kalbarri during May averages 57%. The most humid May was 1984 at 68%, and the least humid was 2018 at 44%.
May receives about 3.9 kWh/m²/day of solar energy in Kalbarri. The sunniest May was 2000 at 4.4 kWh/m²/day, and the cloudiest were 1997 and 1999 at 3.3.
Average wind speed in Kalbarri during May is 3.5 m/s. The windiest Mays were 1997, 2000 and 2018, among others at 3.9 m/s, while the calmest was 2008 at 2.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 20.0°C | 20.3°C | 20.5°C | 20.1°C | 21.3°C | +1.3°C |
| Avg High | 25.5°C | 25.6°C | 26.2°C | 25.9°C | 27.2°C | +1.7°C |
| Avg Low | 14.5°C | 14.9°C | 14.8°C | 14.3°C | 15.5°C | +1°C |
| Avg Rain | 66 mm | 55 mm | 34 mm | 31 mm | 33 mm | -33 mm |
May temperatures in Kalbarri have risen by about 1.1°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 7.7°C (2019) to a record high of 35.1°C (2018).
Rainfall in May is a relatively wet time of year, averaging 44 mm, with a wettest year of 204 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.4°C per decade while lows rose 0.1°C per decade, widening the gap between day and night.
One of the best times to visit Kalbarri
May is one of the best times to visit Kalbarri. Expect days averaging 26°C and nights around 14.8°C (mean 20.4°C) — cooler than Kalbarri's yearly average — with moderate rainfall (44 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 🔥 | 29.1°C | 22.6°C | 16.2°C | 35.1°C | 11.7°C | 24 mm | 47% | 3.5 m/s | 4.3 |
| 2024 | 28.1°C | 22.4°C | 16.7°C | 32.3°C | 12.1°C | 9 mm | 50% | 3.3 m/s | 4 |
| 2023 | 27.1°C | 21.2°C | 15.3°C | 32.7°C | 11.6°C | 42 mm | 47% | 3.6 m/s | 3.9 |
| 2022 | 26.3°C | 20.8°C | 15.3°C | 31.2°C | 10.5°C | 27 mm | 56% | 3.4 m/s | 3.8 |
| 2021 | 26.4°C | 21.0°C | 15.7°C | 31.9°C | 9.2°C | 70 mm | 58% | 3.6 m/s | 3.7 |
| 2020 | 26.1°C | 20.0°C | 14.0°C | 31.2°C | 10.7°C | 27 mm | 50% | 3.8 m/s | 4.1 |
| 2019 | 27.3°C | 20.6°C | 14.0°C | 30.9°C | 7.7°C | 1 mm | 49% | 3.7 m/s | 4.3 |
| 2018 | 27.4°C | 21.2°C | 15.0°C | 35.1°C | 10.7°C | 16 mm | 44% | 3.9 m/s | 4.3 |
| 2017 | 26.7°C | 20.4°C | 14.2°C | 32.2°C | 10.7°C | 11 mm | 55% | 3.4 m/s | 4.3 |
| 2016 | 24.9°C | 19.2°C | 13.6°C | 30.8°C | 10.3°C | 32 mm | 60% | 3.7 m/s | 4 |
| 2015 | 25.2°C | 19.2°C | 13.2°C | 29.1°C | 10.5°C | 21 mm | 57% | 3.8 m/s | 4.2 |
| 2014 | 24.1°C | 19.4°C | 14.8°C | 27.1°C | 10.5°C | 70 mm | 68% | 3.2 m/s | 3.6 |
| 2013 | 24.4°C | 19.4°C | 14.3°C | 31.4°C | 9.7°C | 54 mm | 62% | 3.6 m/s | 3.9 |
| 2012 | 27.4°C | 21.2°C | 15.0°C | 33.2°C | 10.5°C | 11 mm | 54% | 3.4 m/s | 4.1 |
| 2011 | 25.3°C | 19.9°C | 14.4°C | 30.1°C | 10.9°C | 67 mm | 57% | 3.6 m/s | 4.1 |
| 2010 | 26.1°C | 20.1°C | 14.1°C | 34.6°C | 8.1°C | 26 mm | 56% | 3.6 m/s | 4.2 |
| 2009 | 26.7°C | 20.5°C | 14.4°C | 31.5°C | 8.7°C | 40 mm | 48% | 3.4 m/s | 4.2 |
| 2008 | 26.9°C | 20.9°C | 15.0°C | 31.5°C | 10.6°C | 10 mm | 62% | 2.9 m/s | 4.2 |
| 2007 | 25.6°C | 19.8°C | 13.9°C | 31.6°C | 9.4°C | 12 mm | 60% | 3.6 m/s | 4.1 |
| 2006 | 26.7°C | 20.5°C | 14.4°C | 30.8°C | 12.2°C | 19 mm | 53% | 3.7 m/s | 3.9 |
| 2005 | 27.3°C | 22.1°C | 17.0°C | 33.3°C | 14.1°C | 78 mm | 64% | 3.3 m/s | 3.6 |
| 2004 | 24.5°C | 19.2°C | 13.9°C | 30.8°C | 8.1°C | 44 mm | 59% | 3.5 m/s | 4 |
| 2003 | 27.1°C | 21.6°C | 16.1°C | 33.8°C | 12.1°C | 45 mm | 59% | 3.4 m/s | 3.8 |
| 2002 | 26.6°C | 21.3°C | 16.1°C | 33.8°C | 12.0°C | 40 mm | 61% | 3.1 m/s | 3.5 |
| 2001 | 25.5°C | 20.3°C | 15.2°C | 31.8°C | 10.9°C | 39 mm | 62% | 3.3 m/s | 3.8 |
| 2000 | 24.9°C | 18.5°C | 12.2°C | 28.1°C | 9.8°C | 9 mm | 52% | 3.9 m/s | 4.4 |
| 1999 🌧️ | 26.6°C | 21.7°C | 16.8°C | 31.9°C | 9.7°C | 204 mm | 62% | 3.4 m/s | 3.3 |
| 1998 | 27.7°C | 22.4°C | 17.2°C | 34.0°C | 13.0°C | 71 mm | 63% | 3.2 m/s | 3.6 |
| 1997 | 24.0°C | 19.4°C | 14.8°C | 28.5°C | 11.5°C | 39 mm | 65% | 3.9 m/s | 3.3 |
| 1996 | 26.8°C | 20.9°C | 15.0°C | 31.1°C | 10.7°C | 35 mm | 54% | 3.4 m/s | 4 |
| 1995 | 24.1°C | 18.8°C | 13.5°C | 29.6°C | 9.9°C | 25 mm | 59% | 3.9 m/s | 3.9 |
| 1994 | 27.8°C | 21.8°C | 15.8°C | 34.5°C | 12.3°C | 45 mm | 58% | 3.2 m/s | 4.3 |
| 1993 | 24.4°C | 18.9°C | 13.5°C | 29.4°C | 7.9°C | 42 mm | 59% | 3.8 m/s | 3.9 |
| 1992 ❄️ | 23.7°C | 18.4°C | 13.0°C | 27.8°C | 8.8°C | 9 mm | 62% | 3.3 m/s | 4 |
| 1991 | 26.2°C | 20.8°C | 15.5°C | 31.2°C | 11.0°C | 34 mm | 62% | 3.2 m/s | 3.6 |
| 1990 | 24.7°C | 19.4°C | 14.2°C | 32.6°C | 8.3°C | 44 mm | 64% | 3.7 m/s | 4 |
| 1989 | 26.5°C | 21.1°C | 15.6°C | 31.6°C | 11.3°C | 105 mm | 61% | 3.4 m/s | 4 |
| 1988 | 24.0°C | 19.4°C | 14.7°C | 29.5°C | 9.7°C | 119 mm | 66% | 3.4 m/s | 3.6 |
| 1987 | 24.7°C | 18.6°C | 12.5°C | 29.4°C | 8.8°C | 27 mm | 54% | 3.5 m/s | 3.9 |
| 1986 | 24.3°C | 18.9°C | 13.4°C | 27.9°C | 10.1°C | 46 mm | 58% | 3.5 m/s | 3.9 |
| 1985 | 26.3°C | 20.3°C | 14.4°C | 31.2°C | 9.7°C | 9 mm | 52% | 3.3 m/s | 4.1 |
| 1984 | 23.9°C | 19.5°C | 15.1°C | 30.3°C | 10.6°C | 161 mm | 68% | 3.5 m/s | 3.5 |
| 1983 | 28.0°C | 21.3°C | 14.5°C | 33.1°C | 11.4°C | 13 mm | 55% | 3.3 m/s | — |
| 1982 | 25.4°C | 20.0°C | 14.7°C | 29.6°C | 10.6°C | 25 mm | 62% | 3.6 m/s | — |
| 1981 | 26.8°C | 21.3°C | 15.9°C | 32.5°C | 10.2°C | 89 mm | 52% | 3.9 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 26°C with lows near 14.8°C (mean 20.4°C), based on 45 years of NASA POWER data.
May averages 44 mm of rainfall in Kalbarri, a relatively wet time of year. The wettest on record was 204 mm in 1999.
The hottest May reached 35.1°C in 2018. The coldest dipped to 7.7°C in 2019.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.1°C. Daytime highs moved from 26.1°C to 27.4°C and overnight lows from 14.9°C to 15.8°C over the same span.
May is one of the cooler months of the year in Kalbarri and a relatively wet time of year, so plan for around 26°C daytime highs and 14.8°C at night.
Not quite — May is the 5th coolest month in Kalbarri, averaging 20.4°C.
For May in Kalbarri, pack light layers you can adjust through the day, with typical highs of 26°C and lows of 14.8°C.
Relative humidity in May averages 57% — moderately humid.
Average wind speed in May is 3.5 m/s. The windiest May on record averaged 3.9 m/s (1981).
The wettest May on record was 1999 with 204 mm. On average, May sees 44 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 Kalbarri 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.
