May is one of the cooler months of the year in Port Pirie, with average highs near 19.5°C and lows around 9.1°C (mean 14.3°C). It is about average for rainfall, averaging 31 mm of rainfall and 65% relative humidity across the period.
May is one of the cooler months of the year in Port Pirie. Across 45 years of records, the warmest May in Port Pirie was 2005 — when the month averaged 16.4°C — while the coldest was 2006 at 12.4°C. Typical May days reach 19.5°C with nights near 9.1°C. The long-term May temperature trend is broadly flat.
May is about average for rainfall in Port Pirie, averaging 31 mm of rainfall. The wettest May on record was 2013 with 68 mm, while the driest was 1996 at 2 mm.
Relative humidity in Port Pirie during May averages 65%. The most humid May was 1989 at 74%, and the least humid was 2005 at 54%.
May receives about 3.1 kWh/m²/day of solar energy in Port Pirie. The sunniest May was 2025 at 3.7 kWh/m²/day, and the cloudiest was 1988 at 2.7.
Average wind speed in Port Pirie during May is 3 m/s. The windiest Mays were 1981 and 2016 at 3.6 m/s, while the calmest were 1996 and 2009 at 2.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.0°C | 14.3°C | 14.5°C | 14.3°C | 14.3°C | +0.3°C |
| Avg High | 19.1°C | 19.7°C | 19.8°C | 19.4°C | 19.8°C | +0.7°C |
| Avg Low | 9.0°C | 9.0°C | 9.2°C | 9.3°C | 8.7°C | -0.3°C |
| Avg Rain | 38 mm | 25 mm | 28 mm | 43 mm | 14 mm | -24 mm |
May temperatures in Port Pirie have risen by about 0.6°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 1.8°C (2020) to a record high of 29.3°C (1988).
Rainfall in May is about average for rainfall, averaging 31 mm, with a wettest year of 68 mm.
A good time to visit Port Pirie
May is a good time to visit Port Pirie, with days averaging 19.5°C and nights around 9.1°C (mean 14.3°C, cooler than Port Pirie's yearly average) and moderate rainfall. March and December 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 | 21.5°C | 15.3°C | 9.1°C | 26.7°C | 3.6°C | 6 mm | 56% | 2.9 m/s | 3.7 |
| 2024 | 21.6°C | 15.3°C | 8.9°C | 25.1°C | 4.0°C | 7 mm | 55% | 2.6 m/s | 3.5 |
| 2023 | 18.6°C | 13.5°C | 8.4°C | 22.9°C | 4.2°C | 23 mm | 70% | 2.6 m/s | 2.9 |
| 2022 | 19.1°C | 14.0°C | 9.0°C | 23.3°C | 5.4°C | 27 mm | 69% | 2.9 m/s | 3.1 |
| 2021 | 20.3°C | 14.8°C | 9.4°C | 26.7°C | 4.6°C | 7 mm | 57% | 2.9 m/s | 3 |
| 2020 | 17.8°C | 12.7°C | 7.5°C | 23.0°C | 1.8°C | 12 mm | 66% | 3.4 m/s | 3.3 |
| 2019 | 19.3°C | 14.2°C | 9.2°C | 26.2°C | 4.6°C | 51 mm | 66% | 3.2 m/s | 3 |
| 2018 | 19.3°C | 14.0°C | 8.8°C | 25.9°C | 4.9°C | 30 mm | 67% | 3 m/s | 3 |
| 2017 | 19.7°C | 14.2°C | 8.7°C | 24.0°C | 3.3°C | 10 mm | 61% | 2.9 m/s | 3.2 |
| 2016 | 20.1°C | 15.2°C | 10.2°C | 27.1°C | 7.5°C | 45 mm | 65% | 3.6 m/s | 2.8 |
| 2015 | 18.2°C | 13.4°C | 8.5°C | 25.8°C | 4.8°C | 25 mm | 74% | 2.9 m/s | 3 |
| 2014 | 20.1°C | 15.6°C | 11.1°C | 25.6°C | 6.3°C | 65 mm | 69% | 3 m/s | 2.9 |
| 2013 🌧️ | 20.9°C | 16.0°C | 11.1°C | 28.4°C | 4.3°C | 68 mm | 64% | 3.4 m/s | 2.9 |
| 2012 | 19.0°C | 13.4°C | 7.8°C | 26.8°C | 4.2°C | 27 mm | 66% | 2.9 m/s | 3.1 |
| 2011 | 17.6°C | 12.9°C | 8.3°C | 23.4°C | 4.4°C | 45 mm | 72% | 2.9 m/s | 2.9 |
| 2010 | 19.4°C | 14.4°C | 9.5°C | 26.1°C | 5.4°C | 66 mm | 65% | 3.1 m/s | 3 |
| 2009 | 19.1°C | 13.9°C | 8.7°C | 22.7°C | 3.7°C | 7 mm | 71% | 2.4 m/s | 2.9 |
| 2008 | 19.9°C | 14.6°C | 9.4°C | 24.1°C | 7.6°C | 35 mm | 65% | 2.5 m/s | 3.3 |
| 2007 | 20.4°C | 15.3°C | 10.2°C | 24.9°C | 6.2°C | 23 mm | 67% | 3.5 m/s | 3.2 |
| 2006 ❄️ | 17.7°C | 12.4°C | 7.0°C | 22.5°C | 2.2°C | 23 mm | 71% | 2.6 m/s | 3.2 |
| 2005 🔥 | 22.2°C | 16.4°C | 10.5°C | 29.1°C | 5.3°C | 5 mm | 54% | 2.8 m/s | 3.3 |
| 2004 | 19.0°C | 13.7°C | 8.5°C | 23.6°C | 4.8°C | 21 mm | 62% | 2.8 m/s | 3.1 |
| 2003 | 20.6°C | 15.1°C | 9.6°C | 25.4°C | 5.0°C | 51 mm | 64% | 3 m/s | 3.1 |
| 2002 | 20.9°C | 15.8°C | 10.7°C | 28.9°C | 4.2°C | 43 mm | 58% | 3.1 m/s | 2.9 |
| 2001 | 19.7°C | 14.4°C | 9.0°C | 27.5°C | 4.2°C | 35 mm | 63% | 2.9 m/s | 3.1 |
| 2000 | 18.1°C | 13.2°C | 8.3°C | 24.2°C | 5.8°C | 41 mm | 71% | 3 m/s | 3 |
| 1999 | 20.6°C | 15.3°C | 10.1°C | 26.5°C | 5.6°C | 42 mm | 58% | 3.2 m/s | 3 |
| 1998 | 20.3°C | 14.6°C | 8.9°C | 25.1°C | 5.2°C | 7 mm | 61% | 2.7 m/s | 3.1 |
| 1997 | 19.3°C | 14.1°C | 9.0°C | 28.1°C | 3.7°C | 21 mm | 66% | 2.6 m/s | 2.8 |
| 1996 | 20.5°C | 14.7°C | 8.9°C | 27.4°C | 4.9°C | 2 mm | 62% | 2.4 m/s | 3.2 |
| 1995 | 18.0°C | 12.9°C | 7.9°C | 26.2°C | 4.1°C | 38 mm | 70% | 3.1 m/s | 3 |
| 1994 | 20.1°C | 14.5°C | 9.0°C | 26.5°C | 5.3°C | 6 mm | 58% | 3.4 m/s | 3.3 |
| 1993 | 20.5°C | 15.1°C | 9.7°C | 27.2°C | 4.2°C | 26 mm | 63% | 2.7 m/s | 3 |
| 1992 | 17.9°C | 13.3°C | 8.7°C | 25.9°C | 3.7°C | 53 mm | 71% | 2.7 m/s | 2.9 |
| 1991 | 19.7°C | 14.0°C | 8.2°C | 23.6°C | 4.1°C | 4 mm | 62% | 2.7 m/s | 3.3 |
| 1990 | 20.1°C | 14.9°C | 9.8°C | 27.1°C | 4.0°C | 51 mm | 67% | 3.3 m/s | 3.1 |
| 1989 | 18.4°C | 13.6°C | 8.7°C | 23.3°C | 4.8°C | 40 mm | 74% | 2.9 m/s | 2.9 |
| 1988 | 19.9°C | 15.3°C | 10.7°C | 29.3°C | 5.6°C | 62 mm | 70% | 3.2 m/s | 2.7 |
| 1987 | 18.1°C | 13.2°C | 8.4°C | 24.5°C | 3.2°C | 56 mm | 71% | 3.4 m/s | 2.9 |
| 1986 | 19.4°C | 14.2°C | 9.0°C | 23.8°C | 3.7°C | 25 mm | 64% | 3 m/s | 3.2 |
| 1985 | 19.2°C | 13.7°C | 8.3°C | 27.2°C | 2.0°C | 29 mm | 60% | 2.8 m/s | 3.3 |
| 1984 | 19.7°C | 14.4°C | 9.1°C | 25.4°C | 4.3°C | 15 mm | 63% | 3 m/s | 3.1 |
| 1983 | 19.2°C | 13.9°C | 8.7°C | 23.1°C | 6.4°C | 39 mm | 68% | 3 m/s | — |
| 1982 | 19.2°C | 14.0°C | 8.8°C | 25.5°C | 5.6°C | 20 mm | 63% | 2.9 m/s | — |
| 1981 | 18.9°C | 14.1°C | 9.3°C | 27.0°C | 4.5°C | 52 mm | 63% | 3.6 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 19.5°C with lows near 9.1°C (mean 14.3°C), based on 45 years of NASA POWER data.
May averages 31 mm of rainfall in Port Pirie, about average for rainfall. The wettest on record was 68 mm in 2013.
The hottest May reached 29.3°C in 1988. The coldest dipped to 1.8°C in 2020.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.6°C. Daytime highs moved from 19.2°C to 20.2°C and overnight lows from 8.8°C to 9°C over the same span.
May is one of the cooler months of the year in Port Pirie and about average for rainfall, so plan for around 19.5°C daytime highs and 9.1°C at night.
Not quite — May is the 5th coolest month in Port Pirie, averaging 14.3°C.
For May in Port Pirie, pack light layers you can adjust through the day, with typical highs of 19.5°C and lows of 9.1°C.
Relative humidity in May averages 65% — moderately humid.
Average wind speed in May is 3 m/s. The windiest May on record averaged 3.6 m/s (1981).
The wettest May on record was 2013 with 68 mm. On average, May sees 31 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 Port Pirie 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.
