May is close to Waitakere's year-round average, with average highs near 16.8°C and lows around 14.5°C (mean 15.7°C). It is a relatively wet time of year, averaging 114 mm of rainfall and 79% relative humidity across the period.
May is close to Waitakere's year-round average. Across 45 years of records, the warmest May in Waitakere was 2016 — when the month averaged 17.5°C — while the coldest was 1992 at 13.5°C. Typical May days reach 16.8°C with nights near 14.5°C. The long-term trend is warming, about 0.3°C per decade.
May is a relatively wet time of year in Waitakere, averaging 114 mm of rainfall. The wettest May on record was 2013 with 210 mm, while the driest was 2007 at 39 mm.
Relative humidity in Waitakere during May averages 79%. The most humid May was 2023 at 84%, and the least humid was 2008 at 76%.
May receives about 2.4 kWh/m²/day of solar energy in Waitakere. The sunniest Mays were 1985, 2014 and 2024 at 2.7 kWh/m²/day, and the cloudiest was 1988 at 2.1.
Average wind speed in Waitakere during May is 5.8 m/s. The windiest May was 1994 at 7.4 m/s, while the calmest was 1987 at 4.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 15.2°C | 15.3°C | 15.8°C | 16.0°C | 16.1°C | +0.9°C |
| Avg High | 16.4°C | 16.5°C | 17.0°C | 17.2°C | 17.2°C | +0.8°C |
| Avg Low | 14.0°C | 14.2°C | 14.7°C | 14.8°C | 14.9°C | +0.9°C |
| Avg Rain | 107 mm | 91 mm | 124 mm | 126 mm | 130 mm | +23 mm |
May temperatures in Waitakere have risen by about 1.1°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 8°C (2009) to a record high of 21°C (2016).
Rainfall in May is a relatively wet time of year, averaging 114 mm, with a wettest year of 210 mm.
A good time to visit Waitakere
May is a good time to visit Waitakere, with days averaging 16.8°C and nights around 14.5°C (mean 15.7°C, close to Waitakere's yearly average) and higher rainfall. February and January 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 | 17.5°C | 16.4°C | 15.2°C | 20.1°C | 12.9°C | 114 mm | 79% | 5.3 m/s | 2.6 |
| 2024 | 16.1°C | 15.0°C | 13.9°C | 18.4°C | 10.4°C | 84 mm | 77% | 5.8 m/s | 2.7 |
| 2023 | 17.6°C | 16.6°C | 15.6°C | 20.8°C | 12.7°C | 205 mm | 84% | 6.7 m/s | 2.3 |
| 2022 | 18.0°C | 16.8°C | 15.6°C | 19.7°C | 11.9°C | 135 mm | 79% | 5.4 m/s | 2.6 |
| 2021 | 17.1°C | 15.9°C | 14.8°C | 19.4°C | 11.8°C | 91 mm | 79% | 5.6 m/s | 2.5 |
| 2020 | 16.9°C | 15.6°C | 14.3°C | 19.9°C | 11.0°C | 149 mm | 81% | 5.6 m/s | 2.4 |
| 2019 | 17.9°C | 16.6°C | 15.4°C | 20.2°C | 13.0°C | 60 mm | 78% | 5.1 m/s | 2.6 |
| 2018 | 17.3°C | 16.1°C | 14.9°C | 20.0°C | 10.5°C | 116 mm | 80% | 5.9 m/s | 2.6 |
| 2017 | 16.5°C | 15.4°C | 14.3°C | 19.0°C | 10.8°C | 150 mm | 79% | 5.2 m/s | 2.6 |
| 2016 🔥 | 18.7°C | 17.5°C | 16.3°C | 21.0°C | 13.2°C | 130 mm | 80% | 6.2 m/s | 2.4 |
| 2015 | 17.0°C | 15.7°C | 14.5°C | 20.6°C | 10.5°C | 119 mm | 77% | 5.9 m/s | 2.4 |
| 2014 | 17.0°C | 15.7°C | 14.4°C | 19.6°C | 9.8°C | 77 mm | 78% | 4.9 m/s | 2.7 |
| 2013 🌧️ | 17.2°C | 16.0°C | 14.8°C | 19.7°C | 8.9°C | 210 mm | 79% | 5.6 m/s | 2.3 |
| 2012 | 16.2°C | 14.9°C | 13.6°C | 18.4°C | 10.5°C | 89 mm | 78% | 5.9 m/s | 2.5 |
| 2011 | 17.5°C | 16.4°C | 15.4°C | 20.0°C | 12.8°C | 148 mm | 83% | 6.1 m/s | 2.3 |
| 2010 | 17.1°C | 15.9°C | 14.7°C | 19.2°C | 12.3°C | 162 mm | 78% | 5.9 m/s | 2.3 |
| 2009 | 15.5°C | 14.3°C | 13.1°C | 18.4°C | 8.0°C | 147 mm | 77% | 6.7 m/s | 2.4 |
| 2008 | 16.2°C | 15.0°C | 13.8°C | 17.6°C | 12.1°C | 121 mm | 76% | 5 m/s | 2.6 |
| 2007 | 17.7°C | 16.6°C | 15.6°C | 20.0°C | 13.0°C | 39 mm | 79% | 4.8 m/s | 2.5 |
| 2006 | 16.7°C | 15.6°C | 14.6°C | 18.5°C | 11.9°C | 151 mm | 81% | 5.9 m/s | 2.3 |
| 2005 | 17.7°C | 16.5°C | 15.2°C | 20.3°C | 12.5°C | 150 mm | 83% | 5.8 m/s | 2.3 |
| 2004 | 16.8°C | 15.6°C | 14.5°C | 19.5°C | 12.2°C | 179 mm | 83% | 5.9 m/s | 2.3 |
| 2003 | 17.4°C | 16.3°C | 15.3°C | 20.1°C | 12.2°C | 105 mm | 79% | 5.3 m/s | 2.5 |
| 2002 | 17.1°C | 16.2°C | 15.2°C | 18.6°C | 13.0°C | 68 mm | 77% | 7.3 m/s | 2.2 |
| 2001 | 17.3°C | 16.2°C | 15.0°C | 20.8°C | 9.6°C | 173 mm | 81% | 7 m/s | 2.2 |
| 2000 | 17.3°C | 16.1°C | 14.9°C | 20.7°C | 13.2°C | 104 mm | 80% | 5.7 m/s | 2.3 |
| 1999 | 17.4°C | 16.2°C | 15.0°C | 20.2°C | 12.1°C | 70 mm | 79% | 5.3 m/s | 2.4 |
| 1998 | 17.4°C | 16.3°C | 15.2°C | 18.9°C | 13.2°C | 72 mm | 78% | 6.5 m/s | 2.2 |
| 1997 | 17.1°C | 15.9°C | 14.8°C | 18.4°C | 13.7°C | 109 mm | 80% | 4.9 m/s | 2.2 |
| 1996 | 16.1°C | 14.8°C | 13.5°C | 18.5°C | 10.8°C | 118 mm | 78% | 6.7 m/s | 2.4 |
| 1995 | 17.0°C | 15.8°C | 14.7°C | 20.0°C | 11.9°C | 125 mm | 79% | 5.8 m/s | 2.4 |
| 1994 | 16.9°C | 15.7°C | 14.5°C | 19.2°C | 11.8°C | 48 mm | 78% | 7.4 m/s | 2.5 |
| 1993 | 16.1°C | 15.0°C | 13.8°C | 18.1°C | 11.0°C | 60 mm | 78% | 6 m/s | 2.3 |
| 1992 ❄️ | 14.6°C | 13.5°C | 12.3°C | 17.8°C | 9.2°C | 109 mm | 79% | 6.4 m/s | 2.3 |
| 1991 | 15.5°C | 14.5°C | 13.6°C | 17.8°C | 11.6°C | 58 mm | 79% | 5.8 m/s | 2.4 |
| 1990 | 16.7°C | 15.7°C | 14.8°C | 18.5°C | 13.1°C | 140 mm | 77% | 6.6 m/s | 2.4 |
| 1989 | 16.8°C | 15.5°C | 14.2°C | 20.7°C | 9.9°C | 104 mm | 78% | 5.4 m/s | 2.5 |
| 1988 | 16.6°C | 15.4°C | 14.1°C | 19.9°C | 11.4°C | 143 mm | 84% | 5.5 m/s | 2.1 |
| 1987 | 16.2°C | 15.0°C | 13.8°C | 17.9°C | 12.3°C | 89 mm | 79% | 4.7 m/s | 2.4 |
| 1986 | 16.9°C | 15.7°C | 14.4°C | 18.7°C | 10.0°C | 174 mm | 78% | 5.7 m/s | 2.6 |
| 1985 | 16.0°C | 14.7°C | 13.4°C | 17.8°C | 11.5°C | 92 mm | 78% | 5.2 m/s | 2.7 |
| 1984 | 16.1°C | 15.0°C | 13.9°C | 18.8°C | 9.2°C | 102 mm | 79% | 5.9 m/s | 2.4 |
| 1983 | 15.6°C | 14.4°C | 13.3°C | 19.7°C | 10.5°C | 88 mm | 79% | 6.9 m/s | — |
| 1982 | 16.5°C | 15.4°C | 14.2°C | 18.7°C | 11.0°C | 94 mm | 77% | 6.1 m/s | — |
| 1981 | 16.9°C | 15.6°C | 14.4°C | 19.4°C | 11.4°C | 78 mm | 78% | 5.5 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 16.8°C with lows near 14.5°C (mean 15.7°C), based on 45 years of NASA POWER data.
May averages 114 mm of rainfall in Waitakere, a relatively wet time of year. The wettest on record was 210 mm in 2013.
The hottest May reached 21°C in 2016. The coldest dipped to 8°C in 2009.
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 16.2°C to 17.3°C and overnight lows from 13.8°C to 15°C over the same span.
May is close to Waitakere's year-round average and a relatively wet time of year, so plan for around 16.8°C daytime highs and 14.5°C at night.
Not quite — May is the 6th coolest month in Waitakere, averaging 15.7°C.
For May in Waitakere, pack light layers you can adjust through the day, with typical highs of 16.8°C and lows of 14.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 79% — quite humid.
Average wind speed in May is 5.8 m/s. The windiest May on record averaged 7.4 m/s (1994).
The wettest May on record was 2013 with 210 mm. On average, May sees 114 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 Waitakere 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.
