May is one of the cooler months of the year in Clare, with average highs near 18.4°C and lows around 7.8°C (mean 13.1°C). It is about average for rainfall, averaging 39 mm of rainfall and 70% relative humidity across the period.
May is one of the cooler months of the year in Clare. Across 45 years of records, the warmest May in Clare was 2005 — when the month averaged 14.9°C — while the coldest was 2006 at 11.1°C. Typical May days reach 18.4°C with nights near 7.8°C. The long-term May temperature trend is broadly flat.
May is about average for rainfall in Clare, averaging 39 mm of rainfall. The wettest May on record was 2019 with 92 mm, while the driest was 1996 at 4 mm.
Relative humidity in Clare during May averages 70%. The most humid May was 2009 at 77%, and the least humid was 2005 at 59%.
May receives about 3.1 kWh/m²/day of solar energy in Clare. The sunniest May was 2025 at 3.7 kWh/m²/day, and the cloudiest was 1988 at 2.7.
Average wind speed in Clare during May is 2.8 m/s. The windiest May was 2016 at 3.8 m/s, while the calmest were 1996, 2009 and 2024, among others at 2.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.9°C | 13.1°C | 13.2°C | 13.2°C | 13.0°C | +0.1°C |
| Avg High | 18.1°C | 18.5°C | 18.6°C | 18.3°C | 18.6°C | +0.5°C |
| Avg Low | 7.7°C | 7.7°C | 7.9°C | 8.1°C | 7.4°C | -0.3°C |
| Avg Rain | 42 mm | 27 mm | 34 mm | 57 mm | 28 mm | -14 mm |
May temperatures in Clare have risen by about 0.6°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 0.7°C (1985) to a record high of 29.7°C (2005).
Rainfall in May is about average for rainfall, averaging 39 mm, with a wettest year of 92 mm.
A good time to visit Clare
May is a good time to visit Clare, with days averaging 18.4°C and nights around 7.8°C (mean 13.1°C, cooler than Clare's yearly average) and moderate rainfall. December and March 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 | 20.3°C | 13.9°C | 7.5°C | 26.5°C | 1.8°C | 16 mm | 60% | 2.7 m/s | 3.7 |
| 2024 | 20.4°C | 14.0°C | 7.5°C | 24.0°C | 2.8°C | 9 mm | 60% | 2.3 m/s | 3.5 |
| 2023 | 17.5°C | 12.3°C | 7.2°C | 22.6°C | 2.5°C | 50 mm | 76% | 2.6 m/s | 2.9 |
| 2022 | 17.9°C | 12.8°C | 7.8°C | 22.7°C | 3.4°C | 50 mm | 74% | 2.9 m/s | 3.1 |
| 2021 | 19.2°C | 13.6°C | 8.0°C | 25.7°C | 3.1°C | 12 mm | 60% | 2.7 m/s | 3 |
| 2020 | 16.5°C | 11.4°C | 6.3°C | 22.4°C | 2.2°C | 33 mm | 73% | 3.3 m/s | 3.3 |
| 2019 🌧️ | 18.0°C | 13.0°C | 7.9°C | 25.0°C | 3.5°C | 92 mm | 72% | 3.1 m/s | 3 |
| 2018 | 18.3°C | 13.0°C | 7.7°C | 25.9°C | 3.5°C | 58 mm | 72% | 2.9 m/s | 3 |
| 2017 | 18.2°C | 12.7°C | 7.2°C | 23.1°C | 1.5°C | 22 mm | 68% | 2.6 m/s | 3.2 |
| 2016 | 18.9°C | 14.0°C | 9.1°C | 24.9°C | 6.7°C | 85 mm | 71% | 3.8 m/s | 2.8 |
| 2015 | 17.5°C | 12.7°C | 7.9°C | 25.8°C | 3.5°C | 38 mm | 76% | 3.2 m/s | 3 |
| 2014 | 19.5°C | 14.7°C | 9.9°C | 25.2°C | 4.5°C | 62 mm | 72% | 2.9 m/s | 2.9 |
| 2013 | 19.3°C | 14.4°C | 9.5°C | 27.8°C | 3.3°C | 74 mm | 69% | 3.1 m/s | 2.9 |
| 2012 | 17.6°C | 12.2°C | 6.8°C | 27.1°C | 3.0°C | 46 mm | 73% | 2.7 m/s | 3.1 |
| 2011 | 16.8°C | 11.9°C | 7.0°C | 22.8°C | 3.0°C | 40 mm | 75% | 2.6 m/s | 2.9 |
| 2010 | 18.7°C | 13.4°C | 8.2°C | 25.4°C | 4.1°C | 57 mm | 68% | 2.7 m/s | 3 |
| 2009 | 17.9°C | 12.8°C | 7.7°C | 21.4°C | 2.7°C | 16 mm | 77% | 2.3 m/s | 2.9 |
| 2008 | 18.9°C | 13.4°C | 8.0°C | 23.3°C | 6.5°C | 37 mm | 71% | 2.4 m/s | 3.3 |
| 2007 | 19.2°C | 14.3°C | 9.5°C | 24.4°C | 5.4°C | 32 mm | 72% | 3.7 m/s | 3.2 |
| 2006 ❄️ | 16.4°C | 11.1°C | 5.9°C | 20.5°C | 1.1°C | 40 mm | 76% | 2.5 m/s | 3.2 |
| 2005 🔥 | 21.1°C | 14.9°C | 8.6°C | 29.7°C | 3.6°C | 6 mm | 59% | 2.4 m/s | 3.3 |
| 2004 | 17.7°C | 12.3°C | 6.9°C | 21.8°C | 4.1°C | 23 mm | 69% | 2.7 m/s | 3.1 |
| 2003 | 19.4°C | 13.9°C | 8.5°C | 25.0°C | 3.3°C | 46 mm | 68% | 2.9 m/s | 3.1 |
| 2002 | 19.6°C | 14.3°C | 9.0°C | 28.2°C | 2.4°C | 43 mm | 61% | 2.8 m/s | 2.9 |
| 2001 | 18.5°C | 13.1°C | 7.7°C | 27.2°C | 2.5°C | 46 mm | 70% | 2.5 m/s | 3.1 |
| 2000 | 17.0°C | 12.1°C | 7.3°C | 24.0°C | 4.4°C | 51 mm | 76% | 2.9 m/s | 3 |
| 1999 | 19.3°C | 14.1°C | 8.9°C | 25.8°C | 2.7°C | 51 mm | 64% | 3.2 m/s | 3 |
| 1998 | 18.8°C | 13.3°C | 7.8°C | 24.9°C | 3.0°C | 13 mm | 66% | 2.5 m/s | 3.1 |
| 1997 | 17.6°C | 12.6°C | 7.5°C | 27.0°C | 2.8°C | 40 mm | 74% | 2.4 m/s | 2.8 |
| 1996 | 19.5°C | 13.5°C | 7.4°C | 25.2°C | 4.0°C | 4 mm | 68% | 2.3 m/s | 3.2 |
| 1995 | 16.8°C | 11.8°C | 6.8°C | 24.6°C | 2.7°C | 37 mm | 75% | 2.8 m/s | 3 |
| 1994 | 18.6°C | 13.0°C | 7.5°C | 26.2°C | 2.6°C | 16 mm | 65% | 3.5 m/s | 3.3 |
| 1993 | 19.3°C | 13.8°C | 8.4°C | 26.7°C | 3.1°C | 26 mm | 66% | 2.5 m/s | 3 |
| 1992 | 16.9°C | 12.0°C | 7.1°C | 25.0°C | 2.3°C | 55 mm | 75% | 2.5 m/s | 2.9 |
| 1991 | 18.2°C | 12.4°C | 6.7°C | 22.7°C | 1.9°C | 9 mm | 69% | 2.3 m/s | 3.3 |
| 1990 | 19.5°C | 14.0°C | 8.6°C | 27.5°C | 2.0°C | 24 mm | 67% | 3.1 m/s | 3.1 |
| 1989 | 17.8°C | 12.8°C | 7.9°C | 22.4°C | 3.2°C | 53 mm | 76% | 2.8 m/s | 2.9 |
| 1988 | 19.3°C | 14.3°C | 9.4°C | 29.1°C | 4.2°C | 61 mm | 73% | 3.1 m/s | 2.7 |
| 1987 | 17.1°C | 12.3°C | 7.4°C | 24.0°C | 1.8°C | 70 mm | 75% | 3.4 m/s | 2.9 |
| 1986 | 18.1°C | 12.9°C | 7.6°C | 23.9°C | 4.0°C | 23 mm | 69% | 2.9 m/s | 3.2 |
| 1985 | 17.9°C | 12.3°C | 6.7°C | 26.1°C | 0.7°C | 30 mm | 67% | 2.7 m/s | 3.3 |
| 1984 | 18.8°C | 13.3°C | 7.9°C | 25.1°C | 3.3°C | 27 mm | 67% | 2.8 m/s | 3.1 |
| 1983 | 18.0°C | 12.6°C | 7.3°C | 22.2°C | 3.5°C | 38 mm | 73% | 2.8 m/s | — |
| 1982 | 17.9°C | 12.6°C | 7.3°C | 24.7°C | 4.2°C | 30 mm | 69% | 2.9 m/s | — |
| 1981 | 17.8°C | 12.9°C | 7.9°C | 27.0°C | 2.8°C | 47 mm | 67% | 3.5 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 18.4°C with lows near 7.8°C (mean 13.1°C), based on 45 years of NASA POWER data.
May averages 39 mm of rainfall in Clare, about average for rainfall. The wettest on record was 92 mm in 2019.
The hottest May reached 29.7°C in 2005. The coldest dipped to 0.7°C in 1985.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.6°C. Daytime highs moved from 18.1°C to 19.1°C and overnight lows from 7.4°C to 7.6°C over the same span.
May is one of the cooler months of the year in Clare and about average for rainfall, so plan for around 18.4°C daytime highs and 7.8°C at night.
Not quite — May is the 5th coolest month in Clare, averaging 13.1°C.
For May in Clare, pack warm layers and a jacket for chilly mornings, with typical highs of 18.4°C and lows of 7.8°C.
Relative humidity in May averages 70% — moderately humid.
Average wind speed in May is 2.8 m/s. The windiest May on record averaged 3.8 m/s (2016).
The wettest May on record was 2019 with 92 mm. On average, May sees 39 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 Clare 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.
