May is one of the cooler months of the year in Ayr, with average highs near 26°C and lows around 21.7°C (mean 23.9°C). It is one of the drier months, averaging 45 mm of rainfall and 74% relative humidity across the period.
May is one of the cooler months of the year in Ayr. Across 45 years of records, the warmest May in Ayr was 2016 — when the month averaged 25.7°C — while the coldest was 2011 at 21.8°C. Typical May days reach 26°C with nights near 21.7°C. The long-term May temperature trend is broadly flat.
May is one of the drier months in Ayr, averaging 45 mm of rainfall. The wettest May on record was 1983 with 195 mm, while the driest was 2001 at 2 mm.
Relative humidity in Ayr during May averages 74%. The most humid May was 1983 at 83%, and the least humid was 2001 at 58%.
May receives about 4.2 kWh/m²/day of solar energy in Ayr. The sunniest May was 2001 at 5 kWh/m²/day, and the cloudiest were 1990 and 2006 at 3.6.
Average wind speed in Ayr during May is 4.9 m/s. The windiest May was 2024 at 5.9 m/s, while the calmest was 2001 at 3.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.8°C | 23.8°C | 24.0°C | 23.7°C | 23.9°C | +0.1°C |
| Avg High | 25.8°C | 25.9°C | 26.2°C | 26.0°C | 26.1°C | +0.3°C |
| Avg Low | 21.7°C | 21.8°C | 21.8°C | 21.5°C | 21.7°C | 0°C |
| Avg Rain | 68 mm | 51 mm | 21 mm | 38 mm | 49 mm | -19 mm |
May temperatures in Ayr have risen by about 0.4°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 14°C (2020) to a record high of 30.3°C (1996).
Rainfall in May is one of the drier months, averaging 45 mm, with a wettest year of 195 mm.
A good time to visit Ayr
May is a good time to visit Ayr, with days averaging 26°C and nights around 21.7°C (mean 23.9°C, cooler than Ayr's yearly average) and moderate rainfall. August and June 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 | 26.4°C | 24.3°C | 22.2°C | 27.8°C | 18.3°C | 44 mm | 79% | 5.1 m/s | 4.1 |
| 2024 | 26.5°C | 24.4°C | 22.3°C | 27.7°C | 19.3°C | 37 mm | 75% | 5.9 m/s | 4.2 |
| 2023 | 26.2°C | 23.7°C | 21.1°C | 28.4°C | 17.6°C | 9 mm | 69% | 5 m/s | 4.7 |
| 2022 | 26.3°C | 24.4°C | 22.4°C | 27.5°C | 19.7°C | 127 mm | 80% | 4.1 m/s | 4.1 |
| 2021 | 25.8°C | 23.5°C | 21.3°C | 28.2°C | 17.0°C | 16 mm | 74% | 4.8 m/s | 4.7 |
| 2020 | 25.3°C | 23.0°C | 20.6°C | 29.0°C | 14.0°C | 59 mm | 70% | 5.3 m/s | 4.3 |
| 2019 | 26.0°C | 23.8°C | 21.6°C | 28.3°C | 16.5°C | 43 mm | 77% | 5.5 m/s | 4.1 |
| 2018 | 25.7°C | 23.4°C | 21.1°C | 28.1°C | 17.3°C | 16 mm | 73% | 5.3 m/s | 4.5 |
| 2017 | 25.7°C | 23.7°C | 21.7°C | 26.9°C | 18.6°C | 146 mm | 79% | 4.8 m/s | 4.2 |
| 2016 🔥 | 27.7°C | 25.7°C | 23.7°C | 29.3°C | 20.3°C | 18 mm | 75% | 4.5 m/s | 4.2 |
| 2015 | 27.1°C | 24.7°C | 22.2°C | 29.3°C | 17.9°C | 10 mm | 68% | 4.5 m/s | 4.6 |
| 2014 | 25.8°C | 23.8°C | 21.9°C | 27.6°C | 17.0°C | 18 mm | 74% | 5 m/s | 4.3 |
| 2013 | 25.7°C | 23.6°C | 21.6°C | 27.3°C | 17.1°C | 41 mm | 74% | 5.3 m/s | 3.9 |
| 2012 | 25.3°C | 23.0°C | 20.8°C | 28.0°C | 15.3°C | 50 mm | 76% | 5.4 m/s | 4 |
| 2011 ❄️ | 24.4°C | 21.8°C | 19.1°C | 26.8°C | 14.3°C | 21 mm | 71% | 4.5 m/s | 4.5 |
| 2010 | 26.1°C | 23.7°C | 21.3°C | 28.3°C | 15.8°C | 21 mm | 71% | 4.5 m/s | 4.2 |
| 2009 | 25.7°C | 23.5°C | 21.3°C | 26.9°C | 17.0°C | 29 mm | 73% | 5 m/s | 3.9 |
| 2008 | 25.2°C | 22.9°C | 20.6°C | 27.4°C | 16.1°C | 12 mm | 68% | 4.9 m/s | 4.4 |
| 2007 | 26.9°C | 25.0°C | 23.1°C | 28.7°C | 22.4°C | 14 mm | 74% | 5.2 m/s | 4.2 |
| 2006 | 25.5°C | 23.6°C | 21.7°C | 27.9°C | 19.3°C | 42 mm | 76% | 4.9 m/s | 3.6 |
| 2005 | 26.7°C | 24.0°C | 21.3°C | 28.2°C | 17.8°C | 19 mm | 65% | 4.6 m/s | 4.6 |
| 2004 | 26.3°C | 24.4°C | 22.5°C | 28.0°C | 19.0°C | 17 mm | 72% | 4.6 m/s | 4.2 |
| 2003 | 26.5°C | 24.3°C | 22.1°C | 29.0°C | 20.4°C | 26 mm | 72% | 5.3 m/s | 4.2 |
| 2002 | 27.1°C | 24.9°C | 22.6°C | 29.2°C | 18.3°C | 18 mm | 68% | 4.6 m/s | 4.4 |
| 2001 | 27.1°C | 24.4°C | 21.7°C | 29.2°C | 17.8°C | 2 mm | 58% | 3.6 m/s | 5 |
| 2000 | 25.2°C | 23.1°C | 20.9°C | 28.2°C | 14.2°C | 33 mm | 78% | 5 m/s | 4.1 |
| 1999 | 25.8°C | 23.5°C | 21.2°C | 26.8°C | 19.6°C | 19 mm | 78% | 5 m/s | 4.2 |
| 1998 | 26.9°C | 24.8°C | 22.7°C | 29.0°C | 19.1°C | 109 mm | 74% | 4.7 m/s | 3.9 |
| 1997 | 25.1°C | 22.8°C | 20.5°C | 27.2°C | 17.5°C | 52 mm | 73% | 3.8 m/s | 4.4 |
| 1996 | 26.9°C | 24.6°C | 22.2°C | 30.3°C | 19.7°C | 16 mm | 69% | 5 m/s | 4.2 |
| 1995 | 26.4°C | 24.5°C | 22.6°C | 27.7°C | 18.9°C | 32 mm | 74% | 4.9 m/s | 3.8 |
| 1994 | 25.4°C | 23.3°C | 21.3°C | 26.9°C | 17.8°C | 21 mm | 74% | 5.1 m/s | 4 |
| 1993 | 25.7°C | 23.8°C | 21.9°C | 26.8°C | 20.8°C | 11 mm | 73% | 5.6 m/s | 4.3 |
| 1992 | 26.2°C | 24.5°C | 22.7°C | 27.6°C | 19.0°C | 80 mm | 76% | 4.7 m/s | 4 |
| 1991 | 25.4°C | 23.3°C | 21.2°C | 27.3°C | 18.0°C | 27 mm | 74% | 5.2 m/s | 4.2 |
| 1990 | 24.7°C | 23.1°C | 21.4°C | 27.8°C | 16.3°C | 140 mm | 82% | 5.3 m/s | 3.6 |
| 1989 | 25.2°C | 23.5°C | 21.8°C | 27.1°C | 16.9°C | 122 mm | 83% | 5.1 m/s | 3.8 |
| 1988 | 26.5°C | 24.1°C | 21.8°C | 28.4°C | 16.4°C | 40 mm | 71% | 4.2 m/s | 4.2 |
| 1987 | 26.3°C | 24.0°C | 21.7°C | 28.7°C | 17.1°C | 21 mm | 72% | 4.9 m/s | 4.2 |
| 1986 | 26.1°C | 24.0°C | 21.8°C | 29.0°C | 16.9°C | 35 mm | 74% | 4.5 m/s | 4.2 |
| 1985 | 25.4°C | 23.3°C | 21.3°C | 27.4°C | 16.8°C | 57 mm | 77% | 5.7 m/s | 3.8 |
| 1984 | 26.1°C | 24.0°C | 21.9°C | 27.2°C | 20.3°C | 8 mm | 71% | 5.4 m/s | 4.3 |
| 1983 🌧️ | 25.5°C | 23.8°C | 22.0°C | 27.0°C | 18.8°C | 195 mm | 83% | 5.4 m/s | — |
| 1982 | 25.9°C | 23.7°C | 21.4°C | 27.6°C | 19.2°C | 15 mm | 70% | 4.6 m/s | — |
| 1981 | 25.6°C | 23.7°C | 21.8°C | 27.2°C | 17.9°C | 120 mm | 74% | 4.9 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 26°C with lows near 21.7°C (mean 23.9°C), based on 45 years of NASA POWER data.
May averages 45 mm of rainfall in Ayr, one of the drier months. The wettest on record was 195 mm in 1983.
The hottest May reached 30.3°C in 1996. The coldest dipped to 14°C in 2020.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.4°C. Daytime highs moved from 25.7°C to 26.2°C and overnight lows from 21.7°C to 21.9°C over the same span.
May is one of the cooler months of the year in Ayr and one of the drier months, so plan for around 26°C daytime highs and 21.7°C at night.
Not quite — May is the 5th coolest month in Ayr, averaging 23.9°C.
For May in Ayr, pack light layers you can adjust through the day, with typical highs of 26°C and lows of 21.7°C.
Relative humidity in May averages 74% — moderately humid.
Average wind speed in May is 4.9 m/s. The windiest May on record averaged 5.9 m/s (2024).
The wettest May on record was 1983 with 195 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 Ayr 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.
