May is one of the warmer months of the year in Birkenhead, with average highs near 14.2°C and lows around 7.7°C (mean 11°C). It is one of the drier months, averaging 62 mm of rainfall and 82% relative humidity across the period.
May is one of the warmer months of the year in Birkenhead. Across 45 years of records, the warmest May in Birkenhead was 2024 — when the month averaged 13.2°C — while the coldest was 1996 at 8.5°C. Typical May days reach 14.2°C with nights near 7.7°C. The long-term trend is warming, about 0.3°C per decade.
May is one of the drier months in Birkenhead, averaging 62 mm of rainfall. The wettest May on record was 2021 with 131 mm, while the driest were 1991 and 2020 at 15 mm.
Relative humidity in Birkenhead during May averages 82%. The most humid May was 2024 at 86%, and the least humid were 1984 and 2025 at 79%.
May receives about 4.9 kWh/m²/day of solar energy in Birkenhead. The sunniest Mays were 2020 and 2025 at 5.9 kWh/m²/day, and the cloudiest was 1993 at 4.1.
Average wind speed in Birkenhead during May is 3.6 m/s. The windiest May was 2011 at 5.1 m/s, while the calmest was 1990 at 2.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.2°C | 10.7°C | 11.2°C | 10.9°C | 11.9°C | +1.7°C |
| Avg High | 13.4°C | 14.1°C | 14.4°C | 14.1°C | 15.1°C | +1.7°C |
| Avg Low | 7.1°C | 7.4°C | 8.1°C | 7.7°C | 8.6°C | +1.5°C |
| Avg Rain | 58 mm | 57 mm | 72 mm | 61 mm | 64 mm | +6 mm |
May temperatures in Birkenhead have risen by about 1.9°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 1.4°C (2012) to a record high of 22.7°C (2017).
Rainfall in May is one of the drier months, averaging 62 mm, with a wettest year of 131 mm.
A good time to visit Birkenhead
May is a good time to visit Birkenhead, with days averaging 14.2°C and nights around 7.7°C (mean 11°C, warmer than Birkenhead's yearly average) and moderate rainfall. July and August 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 | 16.5°C | 12.6°C | 8.7°C | 21.1°C | 4.1°C | 45 mm | 79% | 3.3 m/s | 5.9 |
| 2024 🔥 | 16.2°C | 13.2°C | 10.2°C | 19.9°C | 8.5°C | 91 mm | 86% | 2.9 m/s | 4.4 |
| 2023 | 15.6°C | 12.2°C | 8.8°C | 18.3°C | 6.4°C | 31 mm | 84% | 2.9 m/s | 5.6 |
| 2022 | 15.0°C | 12.2°C | 9.4°C | 18.5°C | 7.7°C | 68 mm | 84% | 3.6 m/s | 4.6 |
| 2021 🌧️ | 12.4°C | 9.6°C | 6.9°C | 18.5°C | 3.2°C | 131 mm | 84% | 3.5 m/s | 4.6 |
| 2020 | 15.0°C | 11.3°C | 7.7°C | 20.4°C | 3.0°C | 15 mm | 79% | 3.6 m/s | 5.9 |
| 2019 | 13.5°C | 10.6°C | 7.6°C | 17.9°C | 4.0°C | 49 mm | 81% | 3.3 m/s | 5 |
| 2018 | 16.3°C | 12.2°C | 8.2°C | 21.7°C | 3.1°C | 34 mm | 82% | 2.8 m/s | 5.6 |
| 2017 | 15.7°C | 12.1°C | 8.5°C | 22.7°C | 4.7°C | 48 mm | 82% | 3.3 m/s | 5.1 |
| 2016 | 15.0°C | 11.4°C | 7.8°C | 19.9°C | 3.8°C | 42 mm | 83% | 3.4 m/s | 5.1 |
| 2015 | 12.2°C | 9.7°C | 7.2°C | 15.2°C | 2.4°C | 104 mm | 82% | 4.6 m/s | 4.6 |
| 2014 | 14.5°C | 11.6°C | 8.7°C | 19.9°C | 4.5°C | 93 mm | 84% | 3.4 m/s | 4.3 |
| 2013 | 12.4°C | 9.5°C | 6.7°C | 18.0°C | 2.9°C | 78 mm | 84% | 4.3 m/s | 4.5 |
| 2012 | 14.1°C | 10.8°C | 7.4°C | 20.9°C | 1.4°C | 64 mm | 82% | 3.2 m/s | 5 |
| 2011 | 13.9°C | 11.1°C | 8.4°C | 17.1°C | 3.4°C | 70 mm | 82% | 5.1 m/s | 4.6 |
| 2010 | 13.2°C | 10.0°C | 6.8°C | 22.3°C | 2.3°C | 34 mm | 81% | 2.8 m/s | 5.2 |
| 2009 | 14.2°C | 11.1°C | 7.9°C | 20.9°C | 3.9°C | 67 mm | 83% | 4.5 m/s | 4.8 |
| 2008 | 16.3°C | 12.4°C | 8.5°C | 21.0°C | 4.4°C | 37 mm | 81% | 3.4 m/s | 5 |
| 2007 | 13.9°C | 11.0°C | 8.1°C | 16.8°C | 5.3°C | 79 mm | 83% | 3.8 m/s | 4.8 |
| 2006 | 14.5°C | 11.3°C | 8.2°C | 20.5°C | 5.3°C | 128 mm | 83% | 3.7 m/s | 4.5 |
| 2005 | 13.5°C | 10.5°C | 7.6°C | 21.1°C | 3.2°C | 53 mm | 81% | 4 m/s | 5.1 |
| 2004 | 14.1°C | 11.3°C | 8.4°C | 18.5°C | 6.0°C | 43 mm | 84% | 2.7 m/s | 5.1 |
| 2003 | 13.9°C | 11.2°C | 8.5°C | 21.5°C | 5.0°C | 106 mm | 84% | 4.3 m/s | 4.5 |
| 2002 | 13.8°C | 11.0°C | 8.2°C | 19.8°C | 4.4°C | 85 mm | 84% | 4.4 m/s | 4.4 |
| 2001 | 15.1°C | 11.4°C | 7.7°C | 19.7°C | 2.6°C | 58 mm | 83% | 2.9 m/s | 5.1 |
| 2000 | 14.6°C | 11.1°C | 7.6°C | 20.5°C | 4.4°C | 64 mm | 83% | 3.4 m/s | 5.3 |
| 1999 | 14.8°C | 11.7°C | 8.6°C | 19.6°C | 5.4°C | 76 mm | 84% | 3.8 m/s | 4.4 |
| 1998 | 15.3°C | 11.9°C | 8.5°C | 21.5°C | 3.6°C | 34 mm | 84% | 3.3 m/s | 5.4 |
| 1997 | 14.5°C | 10.8°C | 7.1°C | 21.0°C | 2.7°C | 90 mm | 82% | 3.2 m/s | 4.9 |
| 1996 ❄️ | 11.8°C | 8.5°C | 5.2°C | 17.8°C | 1.5°C | 61 mm | 80% | 3.7 m/s | 4.6 |
| 1995 | 13.6°C | 10.5°C | 7.4°C | 19.8°C | 1.8°C | 61 mm | 81% | 3.5 m/s | 4.7 |
| 1994 | 13.1°C | 9.8°C | 6.5°C | 17.5°C | 3.1°C | 44 mm | 81% | 3.8 m/s | 4.8 |
| 1993 | 13.8°C | 10.5°C | 7.2°C | 18.3°C | 3.5°C | 99 mm | 82% | 4.3 m/s | 4.1 |
| 1992 | 15.6°C | 12.0°C | 8.3°C | 21.1°C | 4.3°C | 59 mm | 82% | 4.1 m/s | 5.3 |
| 1991 | 13.2°C | 10.1°C | 7.0°C | 17.2°C | 3.4°C | 15 mm | 83% | 3.3 m/s | 4.4 |
| 1990 | 15.4°C | 11.6°C | 7.8°C | 22.2°C | 4.8°C | 27 mm | 80% | 2.6 m/s | 5.1 |
| 1989 | 15.0°C | 11.5°C | 8.0°C | 21.2°C | 4.4°C | 24 mm | 82% | 3.1 m/s | 5.3 |
| 1988 | 14.3°C | 10.9°C | 7.6°C | 18.7°C | 4.4°C | 52 mm | 83% | 3.2 m/s | 5.1 |
| 1987 | 12.4°C | 9.5°C | 6.5°C | 17.2°C | 3.1°C | 41 mm | 83% | 3.9 m/s | 4.9 |
| 1986 | 12.7°C | 9.9°C | 7.1°C | 16.6°C | 4.4°C | 80 mm | 84% | 4.9 m/s | 4.8 |
| 1985 | 13.3°C | 10.1°C | 6.9°C | 17.9°C | 3.2°C | 63 mm | 83% | 3.3 m/s | 4.4 |
| 1984 | 13.3°C | 9.7°C | 6.1°C | 17.0°C | 2.2°C | 46 mm | 79% | 2.9 m/s | 5 |
| 1983 | 12.3°C | 9.6°C | 6.9°C | 16.2°C | 4.3°C | 84 mm | 85% | 3.6 m/s | — |
| 1982 | 13.7°C | 10.3°C | 6.9°C | 18.6°C | 2.2°C | 37 mm | 80% | 3.5 m/s | — |
| 1981 | 13.7°C | 10.7°C | 7.8°C | 19.3°C | 3.0°C | 96 mm | 85% | 3.6 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 14.2°C with lows near 7.7°C (mean 11°C), based on 45 years of NASA POWER data.
May averages 62 mm of rainfall in Birkenhead, one of the drier months. The wettest on record was 131 mm in 2021.
The hottest May reached 22.7°C in 2017. The coldest dipped to 1.4°C in 2012.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.9°C. Daytime highs moved from 13.3°C to 15.1°C and overnight lows from 6.9°C to 8.8°C over the same span.
May is one of the warmer months of the year in Birkenhead and one of the drier months, so plan for around 14.2°C daytime highs and 7.7°C at night.
Not quite — May is the 7th coolest month in Birkenhead, averaging 11°C.
For May in Birkenhead, pack warm layers and a jacket for chilly mornings, with typical highs of 14.2°C and lows of 7.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 82% — quite humid.
Average wind speed in May is 3.6 m/s. The windiest May on record averaged 5.1 m/s (2011).
The wettest May on record was 2021 with 131 mm. On average, May sees 62 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 Birkenhead 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.
