May is one of the warmer months of the year in King's Lynn, with average highs near 13.8°C and lows around 8.3°C (mean 11.1°C). It is about average for rainfall, averaging 55 mm of rainfall and 83% relative humidity across the period.
May is one of the warmer months of the year in King's Lynn. Across 45 years of records, the warmest May in King's Lynn was 2024 — when the month averaged 12.8°C — while the coldest was 1996 at 8.6°C. Typical May days reach 13.8°C with nights near 8.3°C. The long-term trend is warming, about 0.4°C per decade.
May is about average for rainfall in King's Lynn, averaging 55 mm of rainfall. The wettest May on record was 2007 with 117 mm, while the driest was 2020 at 9 mm.
Relative humidity in King's Lynn during May averages 83%. The most humid May was 2024 at 88%, and the least humid was 2011 at 78%.
May receives about 4.9 kWh/m²/day of solar energy in King's Lynn. The sunniest May was 2020 at 6.2 kWh/m²/day, and the cloudiest were 1984 and 1985 at 4.
Average wind speed in King's Lynn during May is 3.9 m/s. The windiest May was 1986 at 4.8 m/s, while the calmest were 1990 and 2004 at 3.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.2°C | 10.9°C | 11.3°C | 11.2°C | 11.8°C | +1.6°C |
| Avg High | 12.9°C | 13.7°C | 14.1°C | 14.0°C | 14.6°C | +1.7°C |
| Avg Low | 7.5°C | 8.0°C | 8.6°C | 8.5°C | 9.1°C | +1.6°C |
| Avg Rain | 59 mm | 39 mm | 63 mm | 57 mm | 60 mm | +1 mm |
May temperatures in King's Lynn have risen by about 1.8°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 2.2°C (1982) to a record high of 22.7°C (1989).
Rainfall in May is about average for rainfall, averaging 55 mm, with a wettest year of 117 mm.
A good time to visit King's Lynn
May is a good time to visit King's Lynn, with days averaging 13.8°C and nights around 8.3°C (mean 11.1°C, warmer than King's Lynn's yearly average) and moderate rainfall. August and July 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 | 14.9°C | 12.2°C | 9.5°C | 21.5°C | 6.5°C | 36 mm | 82% | 4.1 m/s | 5.6 |
| 2024 🔥 | 15.5°C | 12.8°C | 10.1°C | 18.2°C | 7.8°C | 96 mm | 88% | 3.5 m/s | 4.7 |
| 2023 | 14.1°C | 11.5°C | 9.0°C | 18.0°C | 5.6°C | 53 mm | 85% | 3.6 m/s | 5 |
| 2022 | 15.5°C | 12.6°C | 9.8°C | 19.2°C | 6.4°C | 63 mm | 83% | 3.6 m/s | 5.1 |
| 2021 | 12.4°C | 9.9°C | 7.3°C | 16.2°C | 3.6°C | 104 mm | 84% | 4.1 m/s | 4.6 |
| 2020 | 15.1°C | 11.8°C | 8.6°C | 21.6°C | 4.5°C | 9 mm | 79% | 3.6 m/s | 6.2 |
| 2019 | 13.8°C | 11.0°C | 8.3°C | 19.2°C | 4.6°C | 51 mm | 81% | 3.3 m/s | 5 |
| 2018 | 14.9°C | 11.8°C | 8.7°C | 20.3°C | 3.9°C | 44 mm | 84% | 3.7 m/s | 5.5 |
| 2017 | 15.0°C | 12.2°C | 9.5°C | 20.8°C | 4.5°C | 76 mm | 84% | 4 m/s | 4.9 |
| 2016 | 14.0°C | 11.4°C | 8.7°C | 18.0°C | 3.3°C | 67 mm | 84% | 4 m/s | 4.9 |
| 2015 | 13.5°C | 10.7°C | 7.9°C | 16.8°C | 4.4°C | 74 mm | 80% | 4.5 m/s | 4.8 |
| 2014 | 14.7°C | 12.1°C | 9.5°C | 19.4°C | 4.6°C | 97 mm | 82% | 3.8 m/s | 4.7 |
| 2013 | 12.5°C | 9.8°C | 7.2°C | 18.0°C | 3.1°C | 59 mm | 83% | 4.3 m/s | 4.7 |
| 2012 | 13.4°C | 11.0°C | 8.5°C | 20.7°C | 4.4°C | 48 mm | 83% | 3.9 m/s | 4.5 |
| 2011 | 15.1°C | 12.0°C | 9.0°C | 17.7°C | 5.7°C | 31 mm | 78% | 4.6 m/s | 5.2 |
| 2010 | 12.8°C | 10.0°C | 7.2°C | 21.2°C | 4.0°C | 21 mm | 80% | 3.6 m/s | 5.2 |
| 2009 | 14.4°C | 11.7°C | 9.0°C | 18.2°C | 5.7°C | 50 mm | 83% | 4.6 m/s | 5.2 |
| 2008 | 14.7°C | 12.0°C | 9.4°C | 20.8°C | 5.8°C | 39 mm | 84% | 4.2 m/s | 5.2 |
| 2007 🌧️ | 13.8°C | 11.3°C | 8.8°C | 20.1°C | 5.6°C | 117 mm | 85% | 4 m/s | 4.1 |
| 2006 | 14.3°C | 11.5°C | 8.6°C | 20.0°C | 4.9°C | 88 mm | 83% | 4.1 m/s | 4.4 |
| 2005 | 13.4°C | 10.6°C | 7.9°C | 20.2°C | 5.0°C | 38 mm | 81% | 4.3 m/s | 5 |
| 2004 | 14.0°C | 11.2°C | 8.4°C | 18.8°C | 6.2°C | 47 mm | 83% | 3.1 m/s | 4.8 |
| 2003 | 14.6°C | 11.6°C | 8.7°C | 19.9°C | 5.7°C | 55 mm | 83% | 4.1 m/s | 4.8 |
| 2002 | 14.1°C | 11.4°C | 8.7°C | 20.2°C | 5.9°C | 53 mm | 85% | 4.5 m/s | 4.5 |
| 2001 | 13.6°C | 10.9°C | 8.1°C | 19.5°C | 4.7°C | 47 mm | 85% | 3.4 m/s | 5.3 |
| 2000 | 13.7°C | 11.1°C | 8.5°C | 21.7°C | 6.1°C | 90 mm | 86% | 4 m/s | 4.7 |
| 1999 | 15.0°C | 12.2°C | 9.4°C | 19.1°C | 6.8°C | 35 mm | 83% | 4.1 m/s | 4.9 |
| 1998 | 14.2°C | 11.5°C | 8.8°C | 18.8°C | 5.1°C | 22 mm | 85% | 3.6 m/s | 5.8 |
| 1997 | 14.0°C | 10.9°C | 7.7°C | 20.1°C | 2.3°C | 46 mm | 81% | 3.7 m/s | 5.1 |
| 1996 ❄️ | 11.0°C | 8.6°C | 6.2°C | 18.0°C | 3.0°C | 43 mm | 81% | 4.6 m/s | 4.3 |
| 1995 | 14.0°C | 10.8°C | 7.7°C | 21.4°C | 3.5°C | 47 mm | 80% | 3.7 m/s | 4.9 |
| 1994 | 12.3°C | 9.9°C | 7.6°C | 16.7°C | 4.5°C | 68 mm | 84% | 4 m/s | 4.7 |
| 1993 | 13.4°C | 10.7°C | 8.1°C | 17.5°C | 4.5°C | 60 mm | 83% | 4.7 m/s | 4.9 |
| 1992 | 15.8°C | 12.4°C | 9.0°C | 22.7°C | 4.3°C | 26 mm | 80% | 3.7 m/s | 5.6 |
| 1991 | 12.3°C | 9.8°C | 7.2°C | 17.9°C | 4.6°C | 16 mm | 81% | 3.8 m/s | 4.3 |
| 1990 | 14.9°C | 11.7°C | 8.6°C | 20.9°C | 7.1°C | 21 mm | 80% | 3.1 m/s | 5.2 |
| 1989 | 15.1°C | 11.6°C | 8.2°C | 22.7°C | 5.1°C | 13 mm | 82% | 3.3 m/s | 5.7 |
| 1988 | 13.5°C | 11.0°C | 8.4°C | 18.1°C | 5.9°C | 47 mm | 86% | 3.7 m/s | 4.5 |
| 1987 | 11.5°C | 9.0°C | 6.4°C | 17.0°C | 4.8°C | 51 mm | 84% | 4.3 m/s | 4.4 |
| 1986 | 13.7°C | 10.6°C | 7.6°C | 16.7°C | 5.5°C | 66 mm | 83% | 4.8 m/s | 4.5 |
| 1985 | 12.3°C | 9.9°C | 7.4°C | 18.9°C | 4.1°C | 65 mm | 87% | 4 m/s | 4 |
| 1984 | 11.4°C | 9.1°C | 6.7°C | 15.4°C | 4.8°C | 77 mm | 85% | 4 m/s | 4 |
| 1983 | 11.7°C | 9.3°C | 6.9°C | 14.7°C | 4.2°C | 71 mm | 86% | 3.5 m/s | — |
| 1982 | 13.8°C | 10.7°C | 7.6°C | 19.5°C | 2.2°C | 53 mm | 81% | 3.5 m/s | — |
| 1981 | 13.5°C | 10.8°C | 8.2°C | 18.0°C | 3.2°C | 87 mm | 87% | 3.9 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 13.8°C with lows near 8.3°C (mean 11.1°C), based on 45 years of NASA POWER data.
May averages 55 mm of rainfall in King's Lynn, about average for rainfall. The wettest on record was 117 mm in 2007.
The hottest May reached 22.7°C in 1989. The coldest dipped to 2.2°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.8°C. Daytime highs moved from 12.5°C to 14.5°C and overnight lows from 7.4°C to 9.1°C over the same span.
May is one of the warmer months of the year in King's Lynn and about average for rainfall, so plan for around 13.8°C daytime highs and 8.3°C at night.
Not quite — May is the 7th coolest month in King's Lynn, averaging 11.1°C.
For May in King's Lynn, pack light layers you can adjust through the day, with typical highs of 13.8°C and lows of 8.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 83% — quite humid.
Average wind speed in May is 3.9 m/s. The windiest May on record averaged 4.8 m/s (1986).
The wettest May on record was 2007 with 117 mm. On average, May sees 55 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 King's Lynn 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.
