May is one of the cooler months of the year in Gunnedah, with average highs near 20.7°C and lows around 7.9°C (mean 14.3°C). It is one of the drier months, averaging 43 mm of rainfall and 71% relative humidity across the period.
May is one of the cooler months of the year in Gunnedah. Across 45 years of records, the warmest May in Gunnedah was 2007 — when the month averaged 15.9°C — while the coldest was 2023 at 12.5°C. Typical May days reach 20.7°C with nights near 7.9°C. The long-term May temperature trend is broadly flat.
May is one of the drier months in Gunnedah, averaging 43 mm of rainfall. The wettest May on record was 1983 with 145 mm, while the driest was 2006 at 0 mm.
Relative humidity in Gunnedah during May averages 71%. The most humid May was 1989 at 83%, and the least humid was 1994 at 58%.
May receives about 3.6 kWh/m²/day of solar energy in Gunnedah. The sunniest May was 2006 at 4.1 kWh/m²/day, and the cloudiest was 2022 at 3.
Average wind speed in Gunnedah during May is 1.7 m/s. The windiest Mays were 1985 and 1995 at 2 m/s, while the calmest were 2006, 2012 and 2017, among others at 1.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.3°C | 14.6°C | 14.3°C | 14.3°C | 13.9°C | -0.4°C |
| Avg High | 20.5°C | 20.7°C | 20.9°C | 20.9°C | 20.1°C | -0.4°C |
| Avg Low | 8.0°C | 8.6°C | 7.6°C | 7.7°C | 7.8°C | -0.2°C |
| Avg Rain | 63 mm | 61 mm | 24 mm | 35 mm | 28 mm | -35 mm |
May temperatures in Gunnedah have stayed relatively stable across the record.
May has ranged from a record low of -0.9°C (1987) to a record high of 28.4°C (2007).
Rainfall in May is one of the drier months, averaging 43 mm, with a wettest year of 145 mm.
A quieter season to visit Gunnedah
If your dates are flexible, the more temperate months of November and March tend to be the most comfortable for visiting Gunnedah. That said, May — with days averaging 20.7°C and nights around 7.9°C (mean 14.3°C) and moderate rainfall (43 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 20.6°C | 15.1°C | 9.7°C | 24.0°C | 4.8°C | 52 mm | 78% | 1.8 m/s | 3.4 |
| 2024 | 21.2°C | 15.1°C | 8.9°C | 23.6°C | 1.7°C | 33 mm | 75% | 1.8 m/s | 3.6 |
| 2023 ❄️ | 19.5°C | 12.5°C | 5.5°C | 22.7°C | 1.0°C | 3 mm | 67% | 1.5 m/s | 4 |
| 2022 | 20.4°C | 14.6°C | 8.9°C | 26.3°C | 3.4°C | 47 mm | 76% | 1.8 m/s | 3 |
| 2021 | 19.9°C | 13.6°C | 7.2°C | 24.1°C | 0.1°C | 17 mm | 75% | 1.5 m/s | 3.6 |
| 2020 | 18.8°C | 12.6°C | 6.4°C | 23.3°C | 2.1°C | 16 mm | 78% | 1.9 m/s | 3.6 |
| 2019 | 21.5°C | 14.8°C | 8.1°C | 26.6°C | 0.5°C | 23 mm | 65% | 1.6 m/s | 3.6 |
| 2018 | 22.1°C | 14.8°C | 7.6°C | 26.3°C | 2.3°C | 3 mm | 59% | 1.8 m/s | 3.9 |
| 2017 | 21.5°C | 15.0°C | 8.4°C | 24.4°C | 1.2°C | 34 mm | 71% | 1.4 m/s | 3.6 |
| 2016 | 22.4°C | 15.5°C | 8.7°C | 27.0°C | 0.3°C | 47 mm | 65% | 1.6 m/s | 3.5 |
| 2015 | 19.8°C | 13.9°C | 8.0°C | 25.6°C | 0.8°C | 52 mm | 76% | 1.7 m/s | 3.3 |
| 2014 | 20.7°C | 14.4°C | 8.2°C | 25.8°C | 1.4°C | 23 mm | 73% | 1.6 m/s | 3.5 |
| 2013 | 20.8°C | 14.3°C | 7.8°C | 28.1°C | 2.8°C | 23 mm | 67% | 1.7 m/s | 3.6 |
| 2012 | 20.5°C | 13.2°C | 5.8°C | 25.9°C | 1.3°C | 47 mm | 65% | 1.4 m/s | 4 |
| 2011 | 19.3°C | 12.9°C | 6.4°C | 24.2°C | -0.3°C | 55 mm | 68% | 1.7 m/s | 3.5 |
| 2010 | 20.4°C | 14.1°C | 7.7°C | 25.9°C | 1.3°C | 46 mm | 72% | 1.6 m/s | 3.3 |
| 2009 | 20.8°C | 14.7°C | 8.6°C | 23.7°C | 5.3°C | 20 mm | 72% | 1.9 m/s | 3.5 |
| 2008 | 21.6°C | 14.5°C | 7.4°C | 25.1°C | 3.1°C | 11 mm | 65% | 1.6 m/s | 3.7 |
| 2007 🔥 | 22.7°C | 15.9°C | 9.1°C | 28.4°C | 1.8°C | 53 mm | 68% | 1.5 m/s | 3.8 |
| 2006 | 20.3°C | 13.1°C | 5.9°C | 23.6°C | 1.4°C | 0 mm | 63% | 1.4 m/s | 4.1 |
| 2005 | 21.7°C | 15.0°C | 8.3°C | 25.9°C | 2.2°C | 18 mm | 64% | 1.7 m/s | 3.8 |
| 2004 | 20.6°C | 13.4°C | 6.2°C | 24.1°C | -0.8°C | 26 mm | 63% | 1.6 m/s | 3.9 |
| 2003 | 20.8°C | 14.5°C | 8.1°C | 25.3°C | 2.3°C | 6 mm | 72% | 1.8 m/s | 3.8 |
| 2002 | 21.3°C | 14.5°C | 7.7°C | 26.1°C | 3.6°C | 6 mm | 62% | 1.6 m/s | 3.6 |
| 2001 | 19.7°C | 13.6°C | 7.5°C | 24.3°C | 3.3°C | 29 mm | 73% | 1.7 m/s | 3.5 |
| 2000 | 19.7°C | 13.5°C | 7.2°C | 28.0°C | 0.3°C | 68 mm | 76% | 1.8 m/s | 3.6 |
| 1999 | 21.8°C | 15.2°C | 8.5°C | 24.2°C | 2.2°C | 7 mm | 73% | 1.6 m/s | 3.5 |
| 1998 | 19.3°C | 13.7°C | 8.0°C | 25.2°C | 1.1°C | 81 mm | 75% | 1.6 m/s | 3.3 |
| 1997 | 21.0°C | 15.0°C | 9.1°C | 27.0°C | 2.5°C | 56 mm | 71% | 1.7 m/s | 3.1 |
| 1996 | 21.0°C | 15.0°C | 9.0°C | 27.8°C | 2.7°C | 60 mm | 74% | 1.9 m/s | 3.4 |
| 1995 | 20.3°C | 14.6°C | 9.0°C | 25.5°C | 2.2°C | 87 mm | 74% | 2 m/s | 3.2 |
| 1994 | 21.5°C | 14.4°C | 7.3°C | 26.9°C | 2.5°C | 6 mm | 58% | 1.7 m/s | 4 |
| 1993 | 21.5°C | 14.9°C | 8.3°C | 27.3°C | 4.0°C | 64 mm | 68% | 1.6 m/s | 3.6 |
| 1992 | 20.0°C | 14.1°C | 8.3°C | 25.1°C | 1.7°C | 30 mm | 72% | 1.4 m/s | 3.4 |
| 1991 | 20.7°C | 15.1°C | 9.5°C | 26.6°C | 4.3°C | 131 mm | 76% | 1.7 m/s | 3.4 |
| 1990 | 19.5°C | 14.0°C | 8.6°C | 23.1°C | 2.4°C | 86 mm | 82% | 1.6 m/s | 3.5 |
| 1989 | 20.2°C | 15.3°C | 10.4°C | 24.2°C | 2.6°C | 90 mm | 83% | 1.6 m/s | 3.2 |
| 1988 | 20.0°C | 14.1°C | 8.3°C | 25.0°C | 4.3°C | 51 mm | 79% | 1.6 m/s | 3.4 |
| 1987 | 19.8°C | 13.5°C | 7.1°C | 24.0°C | -0.9°C | 79 mm | 73% | 1.7 m/s | 3.5 |
| 1986 | 21.7°C | 15.1°C | 8.5°C | 25.6°C | 3.6°C | 54 mm | 68% | 1.7 m/s | 3.6 |
| 1985 | 21.1°C | 14.5°C | 7.9°C | 26.9°C | 3.1°C | 28 mm | 72% | 2 m/s | 3.7 |
| 1984 | 20.6°C | 13.6°C | 6.7°C | 25.3°C | 2.6°C | 5 mm | 69% | 1.4 m/s | 3.9 |
| 1983 🌧️ | 19.2°C | 13.8°C | 8.4°C | 22.4°C | 3.2°C | 145 mm | 81% | 1.7 m/s | — |
| 1982 | 21.3°C | 14.1°C | 6.8°C | 24.9°C | 0.1°C | 20 mm | 61% | 1.6 m/s | — |
| 1981 | 20.8°C | 14.4°C | 8.0°C | 25.2°C | 2.4°C | 96 mm | 66% | 1.9 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 20.7°C with lows near 7.9°C (mean 14.3°C), based on 45 years of NASA POWER data.
May averages 43 mm of rainfall in Gunnedah, one of the drier months. The wettest on record was 145 mm in 1983.
The hottest May reached 28.4°C in 2007. The coldest dipped to -0.9°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.1°C — but days and nights have moved in opposite directions. Overnight lows rose from 7.6°C to 8°C while daytime highs eased from 20.6°C to 20.3°C, narrowing the gap between day and night.
May is one of the cooler months of the year in Gunnedah and one of the drier months, so plan for around 20.7°C daytime highs and 7.9°C at night.
Not quite — May is the 4th coolest month in Gunnedah, averaging 14.3°C.
For May in Gunnedah, pack warm layers and a jacket for chilly mornings, with typical highs of 20.7°C and lows of 7.9°C.
Relative humidity in May averages 71% — moderately humid.
Average wind speed in May is 1.7 m/s. The windiest May on record averaged 2 m/s (1985).
The wettest May on record was 1983 with 145 mm. On average, May sees 43 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 Gunnedah 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.
