May is one of the cooler months of the year in Bicheno, with average highs near 13.9°C and lows around 7.6°C (mean 10.8°C). It is about average for rainfall, averaging 45 mm of rainfall and 82% relative humidity across the period.
May is one of the cooler months of the year in Bicheno. Across 45 years of records, the warmest May in Bicheno was 2007 — when the month averaged 12.6°C — while the coldest were 2006 and 2011 at 9.3°C. Typical May days reach 13.9°C with nights near 7.6°C. The long-term May temperature trend is broadly flat.
May is about average for rainfall in Bicheno, averaging 45 mm of rainfall. The wettest May on record was 1986 with 146 mm, while the driest was 1991 at 9 mm.
Relative humidity in Bicheno during May averages 82%. The most humid May was 1985 at 87%, and the least humid was 2025 at 77%.
May receives about 2 kWh/m²/day of solar energy in Bicheno. The sunniest May was 2025 at 2.4 kWh/m²/day, and the cloudiest were 1988 and 2014 at 1.8.
Average wind speed in Bicheno during May is 2.6 m/s. The windiest May was 2016 at 3.4 m/s, while the calmest was 1991 at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.7°C | 10.6°C | 10.9°C | 10.7°C | 10.9°C | +0.2°C |
| Avg High | 13.7°C | 13.8°C | 14.0°C | 13.9°C | 14.1°C | +0.4°C |
| Avg Low | 7.7°C | 7.4°C | 7.8°C | 7.6°C | 7.6°C | -0.1°C |
| Avg Rain | 66 mm | 32 mm | 35 mm | 54 mm | 37 mm | -28 mm |
May temperatures in Bicheno have stayed relatively stable across the record.
May has ranged from a record low of 1.9°C (1982) to a record high of 21.9°C (1997).
Rainfall in May is about average for rainfall, averaging 45 mm, with a wettest year of 146 mm.
A good time to visit Bicheno
May is a good time to visit Bicheno, with days averaging 13.9°C and nights around 7.6°C (mean 10.8°C, cooler than Bicheno's yearly average) and moderate 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 | 15.8°C | 11.9°C | 8.0°C | 20.6°C | 3.0°C | 22 mm | 77% | 2.6 m/s | 2.4 |
| 2024 | 13.9°C | 11.1°C | 8.2°C | 17.2°C | 4.4°C | 51 mm | 81% | 2.2 m/s | 2.1 |
| 2023 | 13.4°C | 10.1°C | 6.8°C | 17.0°C | 3.5°C | 31 mm | 80% | 2.8 m/s | 2.1 |
| 2022 | 13.6°C | 11.0°C | 8.4°C | 18.0°C | 5.1°C | 77 mm | 86% | 2.5 m/s | 2 |
| 2021 | 14.1°C | 10.6°C | 7.1°C | 20.8°C | 3.4°C | 27 mm | 80% | 2.8 m/s | 2.1 |
| 2020 | 13.5°C | 10.4°C | 7.3°C | 16.5°C | 3.8°C | 16 mm | 85% | 2.7 m/s | 2.1 |
| 2019 | 14.9°C | 11.6°C | 8.2°C | 20.5°C | 4.1°C | 34 mm | 81% | 2.6 m/s | 2.1 |
| 2018 | 14.4°C | 11.2°C | 7.9°C | 20.4°C | 3.9°C | 68 mm | 80% | 2.9 m/s | 1.9 |
| 2017 | 13.8°C | 10.7°C | 7.7°C | 17.3°C | 4.3°C | 62 mm | 82% | 2.6 m/s | 2 |
| 2016 | 14.2°C | 11.1°C | 8.0°C | 17.7°C | 3.1°C | 76 mm | 80% | 3.4 m/s | 1.9 |
| 2015 | 13.2°C | 9.9°C | 6.7°C | 17.1°C | 3.4°C | 47 mm | 82% | 3.1 m/s | 2.2 |
| 2014 | 14.6°C | 11.3°C | 8.1°C | 18.6°C | 5.4°C | 27 mm | 82% | 2.6 m/s | 1.8 |
| 2013 | 14.0°C | 10.7°C | 7.3°C | 19.3°C | 3.9°C | 40 mm | 82% | 2.5 m/s | 2.1 |
| 2012 | 13.8°C | 10.6°C | 7.5°C | 17.9°C | 4.8°C | 99 mm | 84% | 2.8 m/s | 2 |
| 2011 | 12.3°C | 9.3°C | 6.3°C | 16.5°C | 3.0°C | 25 mm | 86% | 2.3 m/s | 2.1 |
| 2010 | 13.9°C | 10.9°C | 8.0°C | 19.3°C | 3.6°C | 61 mm | 80% | 2.5 m/s | 2.1 |
| 2009 | 14.3°C | 11.2°C | 8.1°C | 18.3°C | 5.5°C | 15 mm | 79% | 2.6 m/s | 2.2 |
| 2008 | 14.5°C | 11.1°C | 7.8°C | 19.0°C | 3.3°C | 19 mm | 82% | 2.1 m/s | 2 |
| 2007 🔥 | 15.9°C | 12.6°C | 9.3°C | 19.8°C | 5.2°C | 52 mm | 81% | 3.1 m/s | 2.1 |
| 2006 ❄️ | 12.3°C | 9.3°C | 6.3°C | 16.7°C | 4.1°C | 28 mm | 84% | 2.6 m/s | 1.9 |
| 2005 | 14.1°C | 10.7°C | 7.3°C | 20.2°C | 3.4°C | 20 mm | 79% | 2.6 m/s | 2.2 |
| 2004 | 13.0°C | 10.0°C | 6.9°C | 16.5°C | 3.4°C | 41 mm | 83% | 3.1 m/s | 1.9 |
| 2003 | 14.2°C | 11.5°C | 8.7°C | 17.2°C | 3.7°C | 78 mm | 86% | 2.3 m/s | 2 |
| 2002 | 15.0°C | 11.7°C | 8.4°C | 21.4°C | 5.2°C | 29 mm | 79% | 2.4 m/s | 2 |
| 2001 | 12.9°C | 10.2°C | 7.5°C | 16.4°C | 2.9°C | 38 mm | 83% | 2.1 m/s | 1.9 |
| 2000 | 14.0°C | 11.0°C | 8.0°C | 18.7°C | 3.6°C | 34 mm | 80% | 3.3 m/s | 2 |
| 1999 | 15.0°C | 11.9°C | 8.8°C | 18.4°C | 4.7°C | 56 mm | 84% | 2.6 m/s | 1.9 |
| 1998 | 13.4°C | 10.5°C | 7.6°C | 18.5°C | 3.6°C | 21 mm | 82% | 2.6 m/s | 2 |
| 1997 | 13.5°C | 10.4°C | 7.4°C | 21.9°C | 3.1°C | 50 mm | 83% | 2.4 m/s | 1.9 |
| 1996 | 13.7°C | 10.3°C | 6.9°C | 17.7°C | 3.8°C | 10 mm | 83% | 2.4 m/s | 2 |
| 1995 | 13.3°C | 10.2°C | 7.0°C | 17.7°C | 4.3°C | 33 mm | 84% | 2.2 m/s | 2.1 |
| 1994 | 13.0°C | 9.8°C | 6.7°C | 18.3°C | 2.1°C | 36 mm | 78% | 3.3 m/s | 2.2 |
| 1993 | 14.3°C | 10.8°C | 7.4°C | 18.9°C | 4.0°C | 21 mm | 82% | 2.6 m/s | 2.2 |
| 1992 | 13.1°C | 10.5°C | 8.0°C | 17.5°C | 5.2°C | 58 mm | 85% | 2.4 m/s | 1.9 |
| 1991 | 14.5°C | 10.9°C | 7.3°C | 17.1°C | 4.8°C | 9 mm | 82% | 1.8 m/s | 2.1 |
| 1990 | 14.0°C | 10.5°C | 7.0°C | 18.5°C | 3.9°C | 23 mm | 81% | 2.8 m/s | 2.2 |
| 1989 | 13.2°C | 10.2°C | 7.3°C | 16.9°C | 2.6°C | 56 mm | 84% | 2.4 m/s | 2 |
| 1988 | 14.2°C | 11.7°C | 9.2°C | 20.4°C | 5.3°C | 101 mm | 86% | 2.2 m/s | 1.8 |
| 1987 | 14.1°C | 11.0°C | 7.9°C | 20.2°C | 2.0°C | 54 mm | 82% | 2.7 m/s | 1.9 |
| 1986 🌧️ | 12.9°C | 10.0°C | 7.0°C | 16.9°C | 3.0°C | 146 mm | 87% | 2.2 m/s | 2.1 |
| 1985 | 13.7°C | 10.8°C | 7.8°C | 19.9°C | 2.4°C | 68 mm | 87% | 2.2 m/s | 2.1 |
| 1984 | 13.8°C | 10.7°C | 7.6°C | 19.0°C | 4.9°C | 23 mm | 84% | 2.3 m/s | 2 |
| 1983 | 13.2°C | 10.5°C | 7.7°C | 16.9°C | 3.0°C | 39 mm | 86% | 2.4 m/s | — |
| 1982 | 14.0°C | 10.5°C | 7.0°C | 18.0°C | 1.9°C | 37 mm | 81% | 2.9 m/s | — |
| 1981 | 13.9°C | 10.9°C | 7.8°C | 19.2°C | 2.6°C | 66 mm | 84% | 2.3 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 13.9°C with lows near 7.6°C (mean 10.8°C), based on 45 years of NASA POWER data.
May averages 45 mm of rainfall in Bicheno, about average for rainfall. The wettest on record was 146 mm in 1986.
The hottest May reached 21.9°C in 1997. The coldest dipped to 1.9°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.2°C. Daytime highs moved from 13.7°C to 14.2°C and overnight lows from 7.6°C to 7.7°C over the same span.
May is one of the cooler months of the year in Bicheno and about average for rainfall, so plan for around 13.9°C daytime highs and 7.6°C at night.
Not quite — May is the 5th coolest month in Bicheno, averaging 10.8°C.
For May in Bicheno, pack warm layers and a jacket for chilly mornings, with typical highs of 13.9°C and lows of 7.6°C.
Relative humidity in May averages 82% — quite humid.
Average wind speed in May is 2.6 m/s. The windiest May on record averaged 3.4 m/s (2016).
The wettest May on record was 1986 with 146 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 Bicheno 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.
