May is one of the cooler months of the year in Gawler, with average highs near 19.1°C and lows around 8.6°C (mean 13.9°C). It is about average for rainfall, averaging 45 mm of rainfall and 71% relative humidity across the period.
May is one of the cooler months of the year in Gawler. Across 45 years of records, the warmest Mays in Gawler were 2005 and 2014 — when the month averaged 15.3°C — while the coldest was 2006 at 11.9°C. Typical May days reach 19.1°C with nights near 8.6°C. The long-term May temperature trend is broadly flat.
May is about average for rainfall in Gawler, averaging 45 mm of rainfall. The wettest May on record was 1987 with 89 mm, while the driest was 2005 at 6 mm.
Relative humidity in Gawler during May averages 71%. The most humid May was 2009 at 79%, and the least humid was 2021 at 60%.
May receives about 2.9 kWh/m²/day of solar energy in Gawler. The sunniest May was 2025 at 3.5 kWh/m²/day, and the cloudiest were 1988, 1997 and 2018 at 2.6.
Average wind speed in Gawler during May is 2.5 m/s. The windiest May was 2016 at 3.3 m/s, while the calmest were 1996, 2009 and 2024, among others at 2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 13.6°C | 13.8°C | 13.9°C | 14.0°C | 13.7°C | +0.1°C |
| Avg High | 18.7°C | 19.1°C | 19.3°C | 19.1°C | 19.3°C | +0.6°C |
| Avg Low | 8.5°C | 8.4°C | 8.6°C | 9.0°C | 8.1°C | -0.4°C |
| Avg Rain | 54 mm | 34 mm | 44 mm | 54 mm | 34 mm | -20 mm |
May temperatures in Gawler have risen by about 0.7°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 1.9°C (1985) to a record high of 30.6°C (2005).
Rainfall in May is about average for rainfall, averaging 45 mm, with a wettest year of 89 mm.
A good time to visit Gawler
May is a good time to visit Gawler, with days averaging 19.1°C and nights around 8.6°C (mean 13.9°C, cooler than Gawler's yearly average) and moderate rainfall. December and March 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 | 20.9°C | 14.6°C | 8.2°C | 27.5°C | 2.3°C | 22 mm | 61% | 2.4 m/s | 3.5 |
| 2024 | 21.3°C | 14.6°C | 8.0°C | 24.8°C | 3.5°C | 11 mm | 61% | 2 m/s | 3.3 |
| 2023 | 18.2°C | 13.1°C | 8.0°C | 23.7°C | 4.1°C | 56 mm | 76% | 2.3 m/s | 2.7 |
| 2022 | 18.7°C | 13.6°C | 8.5°C | 23.7°C | 3.9°C | 60 mm | 75% | 2.5 m/s | 3 |
| 2021 | 19.9°C | 14.5°C | 9.0°C | 27.2°C | 3.2°C | 10 mm | 60% | 2.5 m/s | 2.8 |
| 2020 | 17.1°C | 12.0°C | 7.0°C | 22.9°C | 3.2°C | 48 mm | 74% | 2.9 m/s | 3 |
| 2019 | 19.0°C | 13.9°C | 8.8°C | 25.3°C | 5.5°C | 58 mm | 71% | 2.8 m/s | 2.8 |
| 2018 | 19.2°C | 14.1°C | 9.0°C | 27.0°C | 3.5°C | 40 mm | 71% | 2.6 m/s | 2.6 |
| 2017 | 19.2°C | 13.6°C | 7.9°C | 23.9°C | 2.7°C | 20 mm | 68% | 2.3 m/s | 3 |
| 2016 | 19.6°C | 14.9°C | 10.2°C | 24.8°C | 6.2°C | 70 mm | 71% | 3.3 m/s | 2.7 |
| 2015 | 18.2°C | 13.5°C | 8.8°C | 26.8°C | 3.8°C | 51 mm | 76% | 2.8 m/s | 2.9 |
| 2014 | 20.1°C | 15.3°C | 10.5°C | 25.5°C | 5.0°C | 64 mm | 73% | 2.5 m/s | 2.8 |
| 2013 | 20.1°C | 15.1°C | 10.2°C | 28.9°C | 5.2°C | 81 mm | 69% | 2.7 m/s | 2.8 |
| 2012 | 18.2°C | 12.9°C | 7.6°C | 27.9°C | 4.8°C | 54 mm | 74% | 2.3 m/s | 2.8 |
| 2011 | 17.7°C | 12.7°C | 7.8°C | 23.9°C | 3.5°C | 45 mm | 74% | 2.3 m/s | 2.8 |
| 2010 | 19.7°C | 14.3°C | 8.9°C | 25.8°C | 4.6°C | 56 mm | 68% | 2.4 m/s | 2.8 |
| 2009 | 18.8°C | 13.5°C | 8.3°C | 22.3°C | 3.6°C | 25 mm | 79% | 2 m/s | 2.8 |
| 2008 | 19.4°C | 14.1°C | 8.9°C | 24.4°C | 6.0°C | 53 mm | 72% | 2.1 m/s | 3.1 |
| 2007 | 19.7°C | 14.8°C | 10.0°C | 24.6°C | 5.6°C | 48 mm | 74% | 3.1 m/s | 2.8 |
| 2006 ❄️ | 17.1°C | 11.9°C | 6.8°C | 20.9°C | 2.5°C | 53 mm | 77% | 2.2 m/s | 2.8 |
| 2005 🔥 | 21.7°C | 15.3°C | 9.0°C | 30.6°C | 3.8°C | 6 mm | 62% | 2.1 m/s | 3.1 |
| 2004 | 18.4°C | 13.1°C | 7.7°C | 22.6°C | 4.1°C | 30 mm | 70% | 2.4 m/s | 3 |
| 2003 | 19.9°C | 14.5°C | 9.1°C | 25.3°C | 3.5°C | 57 mm | 70% | 2.5 m/s | 2.9 |
| 2002 | 20.5°C | 15.2°C | 9.8°C | 29.0°C | 3.1°C | 54 mm | 60% | 2.5 m/s | 3 |
| 2001 | 19.3°C | 13.9°C | 8.5°C | 28.1°C | 3.9°C | 56 mm | 70% | 2.1 m/s | 2.9 |
| 2000 | 17.7°C | 12.9°C | 8.1°C | 24.5°C | 4.8°C | 56 mm | 76% | 2.5 m/s | 2.9 |
| 1999 | 19.7°C | 14.6°C | 9.5°C | 26.0°C | 2.9°C | 71 mm | 66% | 2.7 m/s | 2.7 |
| 1998 | 19.4°C | 13.9°C | 8.3°C | 25.6°C | 3.4°C | 18 mm | 67% | 2.2 m/s | 2.9 |
| 1997 | 18.4°C | 13.3°C | 8.3°C | 28.3°C | 3.4°C | 50 mm | 74% | 2.1 m/s | 2.6 |
| 1996 | 19.8°C | 13.9°C | 8.0°C | 26.1°C | 5.3°C | 12 mm | 70% | 2 m/s | 3.1 |
| 1995 | 17.6°C | 12.7°C | 7.9°C | 22.4°C | 4.4°C | 43 mm | 74% | 2.5 m/s | 2.8 |
| 1994 | 19.1°C | 13.7°C | 8.4°C | 27.1°C | 3.6°C | 25 mm | 67% | 3.1 m/s | 3.1 |
| 1993 | 20.0°C | 14.5°C | 9.0°C | 27.5°C | 3.6°C | 29 mm | 66% | 2.2 m/s | 2.9 |
| 1992 | 17.7°C | 12.9°C | 8.1°C | 26.5°C | 3.4°C | 59 mm | 75% | 2.2 m/s | 2.9 |
| 1991 | 19.0°C | 13.3°C | 7.7°C | 23.3°C | 4.1°C | 10 mm | 69% | 2 m/s | 2.9 |
| 1990 | 20.2°C | 14.7°C | 9.1°C | 28.3°C | 2.0°C | 19 mm | 66% | 2.7 m/s | 3 |
| 1989 | 18.7°C | 13.7°C | 8.7°C | 23.2°C | 4.8°C | 70 mm | 76% | 2.5 m/s | 2.8 |
| 1988 | 20.0°C | 15.0°C | 10.0°C | 29.8°C | 5.4°C | 87 mm | 74% | 2.6 m/s | 2.6 |
| 1987 🌧️ | 17.9°C | 13.1°C | 8.3°C | 25.3°C | 2.7°C | 89 mm | 75% | 3 m/s | 2.7 |
| 1986 | 18.8°C | 13.5°C | 8.2°C | 24.7°C | 4.5°C | 34 mm | 72% | 2.5 m/s | 3 |
| 1985 | 18.4°C | 12.9°C | 7.5°C | 26.6°C | 1.9°C | 39 mm | 68% | 2.4 m/s | 3.1 |
| 1984 | 19.4°C | 14.0°C | 8.6°C | 25.7°C | 4.9°C | 36 mm | 68% | 2.5 m/s | 2.9 |
| 1983 | 18.5°C | 13.2°C | 7.9°C | 22.6°C | 3.6°C | 47 mm | 74% | 2.4 m/s | — |
| 1982 | 18.4°C | 13.4°C | 8.4°C | 24.9°C | 4.2°C | 34 mm | 69% | 2.5 m/s | — |
| 1981 | 18.5°C | 13.5°C | 8.5°C | 27.8°C | 2.7°C | 52 mm | 68% | 3 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 19.1°C with lows near 8.6°C (mean 13.9°C), based on 45 years of NASA POWER data.
May averages 45 mm of rainfall in Gawler, about average for rainfall. The wettest on record was 89 mm in 1987.
The hottest May reached 30.6°C in 2005. The coldest dipped to 1.9°C in 1985.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.7°C. Daytime highs moved from 18.6°C to 19.8°C and overnight lows from 8.2°C to 8.3°C over the same span.
May is one of the cooler months of the year in Gawler and about average for rainfall, so plan for around 19.1°C daytime highs and 8.6°C at night.
Not quite — May is the 5th coolest month in Gawler, averaging 13.9°C.
For May in Gawler, pack light layers you can adjust through the day, with typical highs of 19.1°C and lows of 8.6°C.
Relative humidity in May averages 71% — moderately humid.
Average wind speed in May is 2.5 m/s. The windiest May on record averaged 3.3 m/s (2016).
The wettest May on record was 1987 with 89 mm. On average, May sees 45 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 Gawler 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.
