May is close to Larne's year-round average, with average highs near 11.9°C and lows around 8.4°C (mean 10.2°C). It is one of the drier months, averaging 67 mm of rainfall and 84% relative humidity across the period.
May is close to Larne's year-round average. Across 45 years of records, the warmest May in Larne was 2024 — when the month averaged 12.1°C — while the coldest was 1996 at 8.3°C. Typical May days reach 11.9°C with nights near 8.4°C. The long-term trend is warming, about 0.3°C per decade.
May is one of the drier months in Larne, averaging 67 mm of rainfall. The wettest May on record was 2003 with 127 mm, while the driest was 1991 at 17 mm.
Relative humidity in Larne during May averages 84%. The most humid May was 2024 at 89%, and the least humid was 1984 at 80%.
May receives about 5 kWh/m²/day of solar energy in Larne. The sunniest May was 2025 at 6.1 kWh/m²/day, and the cloudiest were 1986 and 1993 at 4.
Average wind speed in Larne during May is 4.5 m/s. The windiest May was 2011 at 6.8 m/s, while the calmest was 1990 at 3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.6°C | 10.0°C | 10.4°C | 10.1°C | 11.0°C | +1.4°C |
| Avg High | 11.3°C | 11.7°C | 12.1°C | 11.9°C | 12.8°C | +1.5°C |
| Avg Low | 7.9°C | 8.2°C | 8.6°C | 8.3°C | 9.3°C | +1.4°C |
| Avg Rain | 60 mm | 61 mm | 79 mm | 69 mm | 62 mm | +2 mm |
May temperatures in Larne have risen by about 1.6°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 2.7°C (1997) to a record high of 19.5°C (2018).
Rainfall in May is one of the drier months, averaging 67 mm, with a wettest year of 127 mm.
A good time to visit Larne
May is a good time to visit Larne, with days averaging 11.9°C and nights around 8.4°C (mean 10.2°C, close to Larne'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 | 14.0°C | 11.8°C | 9.6°C | 17.8°C | 6.7°C | 42 mm | 81% | 3.6 m/s | 6.1 |
| 2024 🔥 | 13.8°C | 12.1°C | 10.5°C | 16.7°C | 8.5°C | 76 mm | 89% | 3.7 m/s | 4.5 |
| 2023 | 13.1°C | 11.3°C | 9.5°C | 16.8°C | 7.7°C | 35 mm | 86% | 3.6 m/s | 5.3 |
| 2022 | 12.5°C | 11.0°C | 9.5°C | 14.0°C | 8.2°C | 83 mm | 87% | 4.8 m/s | 4.6 |
| 2021 | 10.9°C | 9.3°C | 7.7°C | 15.5°C | 3.3°C | 103 mm | 84% | 4.6 m/s | 5.2 |
| 2020 | 12.2°C | 10.5°C | 8.7°C | 15.7°C | 4.3°C | 35 mm | 82% | 4.3 m/s | 5.6 |
| 2019 | 11.5°C | 9.9°C | 8.4°C | 14.5°C | 5.2°C | 50 mm | 82% | 4 m/s | 4.9 |
| 2018 | 13.1°C | 10.9°C | 8.7°C | 19.5°C | 5.8°C | 50 mm | 86% | 3.9 m/s | 5.2 |
| 2017 | 13.4°C | 11.3°C | 9.1°C | 17.3°C | 6.3°C | 45 mm | 85% | 3.8 m/s | 5.5 |
| 2016 | 12.5°C | 10.6°C | 8.7°C | 16.1°C | 6.1°C | 56 mm | 85% | 4.4 m/s | 5.2 |
| 2015 | 10.4°C | 8.9°C | 7.4°C | 12.7°C | 5.7°C | 111 mm | 84% | 6 m/s | 4.7 |
| 2014 | 12.3°C | 10.8°C | 9.2°C | 16.1°C | 6.3°C | 83 mm | 87% | 3.7 m/s | 4.2 |
| 2013 | 10.8°C | 9.0°C | 7.2°C | 13.7°C | 5.0°C | 101 mm | 85% | 5.5 m/s | 4.8 |
| 2012 | 11.7°C | 9.9°C | 8.0°C | 18.1°C | 4.5°C | 64 mm | 83% | 4.1 m/s | 5.2 |
| 2011 | 11.7°C | 10.2°C | 8.7°C | 13.7°C | 6.7°C | 98 mm | 84% | 6.8 m/s | 4.6 |
| 2010 | 11.2°C | 9.6°C | 7.9°C | 19.4°C | 5.1°C | 34 mm | 82% | 4.1 m/s | 5.4 |
| 2009 | 12.0°C | 10.2°C | 8.4°C | 17.5°C | 6.4°C | 91 mm | 86% | 5.2 m/s | 4.8 |
| 2008 | 13.3°C | 11.4°C | 9.5°C | 17.4°C | 6.9°C | 38 mm | 84% | 4 m/s | 5.3 |
| 2007 | 11.9°C | 10.3°C | 8.6°C | 15.0°C | 7.3°C | 62 mm | 83% | 4.5 m/s | 5.4 |
| 2006 | 11.7°C | 9.9°C | 8.2°C | 17.1°C | 5.7°C | 103 mm | 84% | 5.2 m/s | 4.8 |
| 2005 | 11.1°C | 9.5°C | 7.9°C | 13.6°C | 5.4°C | 105 mm | 84% | 5 m/s | 5.1 |
| 2004 | 12.1°C | 10.5°C | 8.8°C | 15.5°C | 6.8°C | 48 mm | 86% | 3.7 m/s | 5.4 |
| 2003 🌧️ | 11.5°C | 10.1°C | 8.6°C | 16.8°C | 6.4°C | 127 mm | 87% | 5.3 m/s | 4.4 |
| 2002 | 12.1°C | 10.5°C | 8.9°C | 14.4°C | 6.8°C | 106 mm | 85% | 5.1 m/s | 4.5 |
| 2001 | 12.8°C | 10.9°C | 9.0°C | 17.5°C | 6.2°C | 49 mm | 84% | 3.6 m/s | 5.3 |
| 2000 | 12.4°C | 10.4°C | 8.3°C | 16.9°C | 6.2°C | 65 mm | 84% | 4.1 m/s | 5.9 |
| 1999 | 12.5°C | 10.7°C | 8.9°C | 15.7°C | 7.1°C | 79 mm | 86% | 4.5 m/s | 4.8 |
| 1998 | 12.5°C | 10.8°C | 9.1°C | 16.1°C | 6.8°C | 52 mm | 87% | 4.5 m/s | 5.3 |
| 1997 | 12.0°C | 10.2°C | 8.3°C | 17.8°C | 2.7°C | 86 mm | 84% | 4.3 m/s | 5 |
| 1996 ❄️ | 10.1°C | 8.3°C | 6.5°C | 14.2°C | 3.1°C | 88 mm | 82% | 4.5 m/s | 4.7 |
| 1995 | 10.9°C | 9.4°C | 8.0°C | 15.5°C | 4.3°C | 61 mm | 85% | 5 m/s | 4.6 |
| 1994 | 11.0°C | 9.1°C | 7.2°C | 14.9°C | 5.5°C | 32 mm | 82% | 4.9 m/s | 5 |
| 1993 | 11.5°C | 9.6°C | 7.7°C | 14.5°C | 4.1°C | 111 mm | 84% | 4.8 m/s | 4 |
| 1992 | 12.5°C | 10.6°C | 8.7°C | 16.5°C | 4.5°C | 43 mm | 86% | 5.3 m/s | 5 |
| 1991 | 11.6°C | 9.9°C | 8.2°C | 15.2°C | 6.0°C | 17 mm | 86% | 4.2 m/s | 4.8 |
| 1990 | 12.8°C | 11.1°C | 9.4°C | 18.9°C | 7.3°C | 43 mm | 83% | 3 m/s | 5.1 |
| 1989 | 12.1°C | 10.2°C | 8.2°C | 18.1°C | 4.8°C | 36 mm | 84% | 4.3 m/s | 5.2 |
| 1988 | 11.9°C | 10.1°C | 8.3°C | 16.1°C | 5.5°C | 47 mm | 85% | 4.3 m/s | 4.8 |
| 1987 | 11.0°C | 9.3°C | 7.6°C | 14.2°C | 4.9°C | 44 mm | 84% | 5 m/s | 4.6 |
| 1986 | 10.6°C | 9.1°C | 7.6°C | 12.6°C | 5.8°C | 118 mm | 87% | 6.3 m/s | 4 |
| 1985 | 11.1°C | 9.3°C | 7.6°C | 13.7°C | 5.4°C | 60 mm | 84% | 4.1 m/s | 4.4 |
| 1984 | 11.5°C | 9.6°C | 7.8°C | 16.1°C | 5.3°C | 25 mm | 80% | 3.9 m/s | 5.4 |
| 1983 | 10.6°C | 9.1°C | 7.7°C | 13.6°C | 5.8°C | 68 mm | 85% | 4.7 m/s | — |
| 1982 | 11.2°C | 9.5°C | 7.8°C | 15.2°C | 3.7°C | 47 mm | 83% | 4.6 m/s | — |
| 1981 | 11.8°C | 10.2°C | 8.5°C | 17.4°C | 4.4°C | 96 mm | 86% | 4.6 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 11.9°C with lows near 8.4°C (mean 10.2°C), based on 45 years of NASA POWER data.
May averages 67 mm of rainfall in Larne, one of the drier months. The wettest on record was 127 mm in 2003.
The hottest May reached 19.5°C in 2018. The coldest dipped to 2.7°C in 1997.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.6°C. Daytime highs moved from 11.2°C to 12.9°C and overnight lows from 7.9°C to 9.4°C over the same span.
May is close to Larne's year-round average and one of the drier months, so plan for around 11.9°C daytime highs and 8.4°C at night.
Not quite — May is the 7th coolest month in Larne, averaging 10.2°C.
For May in Larne, pack light layers you can adjust through the day, with typical highs of 11.9°C and lows of 8.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 84% — quite humid.
Average wind speed in May is 4.5 m/s. The windiest May on record averaged 6.8 m/s (2011).
The wettest May on record was 2003 with 127 mm. On average, May sees 67 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 Larne 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.
