May is one of the cooler months of the year in Streaky Bay, with average highs near 19.4°C and lows around 12.4°C (mean 15.9°C). It is about average for rainfall, averaging 29 mm of rainfall and 69% relative humidity across the period.
May is one of the cooler months of the year in Streaky Bay. Across 45 years of records, the warmest May in Streaky Bay was 2013 — when the month averaged 17.6°C — while the coldest was 2006 at 14.6°C. Typical May days reach 19.4°C with nights near 12.4°C. The long-term May temperature trend is broadly flat.
May is about average for rainfall in Streaky Bay, averaging 29 mm of rainfall. The wettest May on record was 2014 with 81 mm, while the driest was 2024 at 4 mm.
Relative humidity in Streaky Bay during May averages 69%. The most humid May was 2009 at 77%, and the least humid was 1985 at 62%.
May receives about 3.2 kWh/m²/day of solar energy in Streaky Bay. The sunniest Mays were 2024 and 2025 at 3.7 kWh/m²/day, and the cloudiest was 1997 at 2.8.
Average wind speed in Streaky Bay during May is 3.8 m/s. The windiest Mays were 1981, 2007 and 2016 at 4.5 m/s, while the calmest were 1996, 2009 and 2024 at 3.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 15.7°C | 16.0°C | 16.0°C | 16.2°C | 15.8°C | +0.1°C |
| Avg High | 19.2°C | 19.6°C | 19.5°C | 19.5°C | 19.5°C | +0.3°C |
| Avg Low | 12.3°C | 12.4°C | 12.4°C | 12.9°C | 12.1°C | -0.2°C |
| Avg Rain | 35 mm | 31 mm | 32 mm | 32 mm | 10 mm | -24 mm |
May temperatures in Streaky Bay have risen by about 0.4°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 6.7°C (2003) to a record high of 28.5°C (2002).
Rainfall in May is about average for rainfall, averaging 29 mm, with a wettest year of 81 mm.
A good time to visit Streaky Bay
May is a good time to visit Streaky Bay, with days averaging 19.4°C and nights around 12.4°C (mean 15.9°C, cooler than Streaky Bay's yearly average) and low rainfall. January and February 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 | 20.4°C | 16.4°C | 12.4°C | 25.6°C | 7.1°C | 7 mm | 64% | 3.8 m/s | 3.7 |
| 2024 | 20.4°C | 15.7°C | 10.9°C | 23.6°C | 7.8°C | 4 mm | 66% | 3.2 m/s | 3.7 |
| 2023 | 18.9°C | 15.9°C | 12.8°C | 23.1°C | 9.7°C | 11 mm | 72% | 3.5 m/s | 3.2 |
| 2022 | 19.2°C | 15.7°C | 12.2°C | 22.7°C | 8.3°C | 21 mm | 71% | 3.9 m/s | 3.4 |
| 2021 | 19.8°C | 16.2°C | 12.6°C | 24.5°C | 7.6°C | 8 mm | 62% | 3.7 m/s | 3.1 |
| 2020 | 18.3°C | 14.9°C | 11.5°C | 24.8°C | 7.2°C | 12 mm | 67% | 4.4 m/s | 3.3 |
| 2019 | 19.2°C | 15.9°C | 12.6°C | 26.1°C | 9.3°C | 17 mm | 67% | 4.1 m/s | 3.3 |
| 2018 | 19.6°C | 16.4°C | 13.1°C | 25.5°C | 8.5°C | 5 mm | 66% | 4 m/s | 3.3 |
| 2017 | 19.9°C | 16.0°C | 12.1°C | 24.1°C | 7.4°C | 7 mm | 64% | 3.5 m/s | 3.5 |
| 2016 | 19.7°C | 16.7°C | 13.7°C | 24.7°C | 10.1°C | 15 mm | 71% | 4.5 m/s | 3.2 |
| 2015 | 18.2°C | 15.2°C | 12.2°C | 22.9°C | 8.2°C | 21 mm | 71% | 3.9 m/s | 2.9 |
| 2014 🌧️ | 20.6°C | 17.5°C | 14.4°C | 25.4°C | 11.0°C | 81 mm | 74% | 3.3 m/s | 3.1 |
| 2013 🔥 | 21.1°C | 17.6°C | 14.1°C | 27.7°C | 9.1°C | 45 mm | 67% | 4 m/s | 3.1 |
| 2012 | 18.8°C | 15.5°C | 12.1°C | 24.0°C | 7.8°C | 43 mm | 71% | 4 m/s | 3.2 |
| 2011 | 17.9°C | 15.0°C | 12.0°C | 22.2°C | 7.4°C | 30 mm | 73% | 3.7 m/s | 2.9 |
| 2010 | 19.5°C | 16.1°C | 12.6°C | 24.8°C | 8.4°C | 55 mm | 70% | 3.8 m/s | 3.2 |
| 2009 | 18.9°C | 15.4°C | 11.9°C | 22.2°C | 7.4°C | 12 mm | 77% | 3.2 m/s | 3.1 |
| 2008 | 20.0°C | 16.2°C | 12.5°C | 23.8°C | 10.2°C | 20 mm | 69% | 3.4 m/s | 3.5 |
| 2007 | 19.6°C | 16.5°C | 13.3°C | 25.0°C | 9.4°C | 43 mm | 72% | 4.5 m/s | 3.3 |
| 2006 ❄️ | 18.1°C | 14.6°C | 11.1°C | 22.6°C | 6.7°C | 40 mm | 74% | 3.8 m/s | 3.3 |
| 2005 | 20.6°C | 17.0°C | 13.3°C | 27.2°C | 8.4°C | 15 mm | 69% | 3.5 m/s | 3.1 |
| 2004 | 19.1°C | 15.6°C | 12.2°C | 24.5°C | 8.9°C | 23 mm | 69% | 3.7 m/s | 3.2 |
| 2003 | 19.8°C | 15.9°C | 11.9°C | 24.8°C | 6.7°C | 26 mm | 70% | 3.9 m/s | 3.4 |
| 2002 | 21.2°C | 17.4°C | 13.5°C | 28.5°C | 8.9°C | 43 mm | 64% | 3.7 m/s | 3.3 |
| 2001 | 19.1°C | 15.6°C | 12.1°C | 24.9°C | 7.2°C | 60 mm | 70% | 3.8 m/s | 3 |
| 2000 | 18.3°C | 15.4°C | 12.5°C | 25.6°C | 9.6°C | 37 mm | 72% | 3.8 m/s | 3.2 |
| 1999 | 20.0°C | 16.4°C | 12.7°C | 26.3°C | 9.1°C | 25 mm | 67% | 3.5 m/s | 3.1 |
| 1998 | 20.4°C | 16.5°C | 12.7°C | 24.3°C | 9.2°C | 13 mm | 68% | 3.7 m/s | 3.1 |
| 1997 | 18.5°C | 15.5°C | 12.6°C | 26.5°C | 8.6°C | 55 mm | 74% | 3.6 m/s | 2.8 |
| 1996 | 20.1°C | 15.9°C | 11.7°C | 26.5°C | 8.5°C | 12 mm | 70% | 3.2 m/s | 3.4 |
| 1995 | 18.3°C | 15.0°C | 11.7°C | 24.5°C | 8.7°C | 61 mm | 69% | 4.1 m/s | 3.2 |
| 1994 | 20.1°C | 16.4°C | 12.8°C | 26.0°C | 8.9°C | 24 mm | 66% | 4.4 m/s | 3.5 |
| 1993 | 20.1°C | 16.4°C | 12.7°C | 27.8°C | 7.9°C | 20 mm | 67% | 3.4 m/s | 3.3 |
| 1992 | 18.6°C | 15.4°C | 12.1°C | 25.8°C | 7.0°C | 39 mm | 71% | 3.8 m/s | 3.2 |
| 1991 | 19.5°C | 15.7°C | 11.9°C | 23.6°C | 8.4°C | 32 mm | 66% | 3.6 m/s | 3.2 |
| 1990 | 20.5°C | 16.9°C | 13.3°C | 27.3°C | 8.9°C | 25 mm | 68% | 4.2 m/s | 3.3 |
| 1989 | 19.2°C | 15.8°C | 12.4°C | 23.0°C | 9.8°C | 40 mm | 74% | 4.1 m/s | 3 |
| 1988 | 19.9°C | 16.6°C | 13.3°C | 27.5°C | 9.3°C | 36 mm | 72% | 4.4 m/s | 3 |
| 1987 | 18.4°C | 15.3°C | 12.2°C | 24.0°C | 7.9°C | 38 mm | 71% | 4.2 m/s | 3.1 |
| 1986 | 19.3°C | 15.7°C | 12.1°C | 23.9°C | 8.1°C | 32 mm | 70% | 3.7 m/s | 3.3 |
| 1985 | 19.2°C | 15.5°C | 11.7°C | 26.0°C | 7.0°C | 14 mm | 62% | 3.6 m/s | 3.4 |
| 1984 | 19.7°C | 16.0°C | 12.2°C | 24.7°C | 9.0°C | 29 mm | 67% | 4 m/s | 3.3 |
| 1983 | 18.9°C | 15.3°C | 11.8°C | 23.3°C | 8.9°C | 30 mm | 75% | 3.9 m/s | — |
| 1982 | 19.1°C | 15.8°C | 12.6°C | 24.5°C | 9.0°C | 33 mm | 68% | 3.9 m/s | — |
| 1981 | 18.9°C | 15.5°C | 12.1°C | 26.9°C | 9.4°C | 59 mm | 68% | 4.5 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 19.4°C with lows near 12.4°C (mean 15.9°C), based on 45 years of NASA POWER data.
May averages 29 mm of rainfall in Streaky Bay, about average for rainfall. The wettest on record was 81 mm in 2014.
The hottest May reached 28.5°C in 2002. The coldest dipped to 6.7°C in 2003.
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 19.2°C to 19.7°C and overnight lows from 12.1°C to 12.2°C over the same span.
May is one of the cooler months of the year in Streaky Bay and about average for rainfall, so plan for around 19.4°C daytime highs and 12.4°C at night.
Not quite — May is the 5th coolest month in Streaky Bay, averaging 15.9°C.
For May in Streaky Bay, pack light layers you can adjust through the day, with typical highs of 19.4°C and lows of 12.4°C.
Relative humidity in May averages 69% — moderately humid.
Average wind speed in May is 3.8 m/s. The windiest May on record averaged 4.5 m/s (1981).
The wettest May on record was 2014 with 81 mm. On average, May sees 29 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 Streaky Bay 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.
