May is one of the cooler months of the year in Cowell, with average highs near 19.1°C and lows around 10°C (mean 14.6°C). It is about average for rainfall, averaging 26 mm of rainfall and 69% relative humidity across the period.
May is one of the cooler months of the year in Cowell. Across 45 years of records, the warmest May in Cowell was 2013 — when the month averaged 16.2°C — while the coldest was 2006 at 12.7°C. Typical May days reach 19.1°C with nights near 10°C. The long-term May temperature trend is broadly flat.
May is about average for rainfall in Cowell, averaging 26 mm of rainfall. The wettest Mays on record were 1989 and 2010 with 54 mm, while the driest was 2024 at 4 mm.
Relative humidity in Cowell during May averages 69%. The most humid May was 2009 at 78%, and the least humid was 2021 at 59%.
May receives about 3 kWh/m²/day of solar energy in Cowell. The sunniest Mays were 2024 and 2025 at 3.6 kWh/m²/day, and the cloudiest were 1988 and 1997 at 2.7.
Average wind speed in Cowell during May is 3.3 m/s. The windiest May was 2007 at 4.3 m/s, while the calmest were 2009 and 2024 at 2.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.3°C | 14.6°C | 14.7°C | 14.7°C | 14.6°C | +0.3°C |
| Avg High | 18.8°C | 19.1°C | 19.2°C | 19.2°C | 19.3°C | +0.5°C |
| Avg Low | 9.7°C | 10.1°C | 10.2°C | 10.3°C | 9.8°C | +0.1°C |
| Avg Rain | 30 mm | 24 mm | 29 mm | 33 mm | 11 mm | -19 mm |
May temperatures in Cowell have risen by about 0.8°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 4.3°C (1987) to a record high of 29.4°C (2005).
Rainfall in May is about average for rainfall, averaging 26 mm, with a wettest year of 54 mm.
A good time to visit Cowell
May is a good time to visit Cowell, with days averaging 19.1°C and nights around 10°C (mean 14.6°C, cooler than Cowell's yearly average) and low 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 | 20.6°C | 15.3°C | 10.0°C | 27.8°C | 5.6°C | 9 mm | 63% | 3.2 m/s | 3.6 |
| 2024 | 20.7°C | 15.2°C | 9.7°C | 25.1°C | 6.6°C | 4 mm | 67% | 2.6 m/s | 3.6 |
| 2023 | 18.5°C | 14.3°C | 10.2°C | 23.1°C | 8.2°C | 16 mm | 72% | 3.1 m/s | 2.9 |
| 2022 | 18.9°C | 14.4°C | 9.8°C | 23.9°C | 6.1°C | 18 mm | 72% | 3.3 m/s | 3.2 |
| 2021 | 19.8°C | 15.1°C | 10.3°C | 27.6°C | 5.3°C | 6 mm | 59% | 3.2 m/s | 3.1 |
| 2020 | 17.5°C | 13.1°C | 8.8°C | 23.1°C | 5.4°C | 13 mm | 68% | 4 m/s | 3.1 |
| 2019 | 18.9°C | 14.2°C | 9.5°C | 25.6°C | 7.4°C | 23 mm | 68% | 3.6 m/s | 3 |
| 2018 | 19.5°C | 15.1°C | 10.7°C | 26.7°C | 6.8°C | 8 mm | 65% | 3.6 m/s | 3.1 |
| 2017 | 19.7°C | 14.7°C | 9.7°C | 23.9°C | 5.7°C | 6 mm | 63% | 3.1 m/s | 3.2 |
| 2016 | 20.4°C | 15.5°C | 10.6°C | 26.2°C | 7.7°C | 19 mm | 67% | 4.2 m/s | 3 |
| 2015 | 18.0°C | 13.7°C | 9.5°C | 26.3°C | 6.2°C | 32 mm | 74% | 3.5 m/s | 2.9 |
| 2014 | 20.4°C | 16.0°C | 11.6°C | 26.0°C | 6.9°C | 48 mm | 71% | 3.2 m/s | 2.9 |
| 2013 🔥 | 20.7°C | 16.2°C | 11.6°C | 28.1°C | 7.0°C | 53 mm | 68% | 3.7 m/s | 2.9 |
| 2012 | 18.0°C | 13.8°C | 9.5°C | 27.8°C | 6.1°C | 47 mm | 72% | 3.3 m/s | 2.9 |
| 2011 | 17.3°C | 13.6°C | 10.0°C | 23.1°C | 5.1°C | 37 mm | 73% | 3.4 m/s | 2.8 |
| 2010 | 19.0°C | 14.5°C | 10.1°C | 26.5°C | 5.7°C | 54 mm | 70% | 3.3 m/s | 2.9 |
| 2009 | 18.3°C | 14.2°C | 10.1°C | 22.3°C | 6.7°C | 20 mm | 78% | 2.6 m/s | 2.9 |
| 2008 | 19.8°C | 14.9°C | 10.0°C | 24.9°C | 7.6°C | 23 mm | 70% | 2.8 m/s | 3.2 |
| 2007 | 20.1°C | 15.4°C | 10.7°C | 25.9°C | 6.0°C | 32 mm | 69% | 4.3 m/s | 3.2 |
| 2006 ❄️ | 17.1°C | 12.7°C | 8.4°C | 21.7°C | 5.6°C | 23 mm | 74% | 3 m/s | 3 |
| 2005 | 20.6°C | 16.1°C | 11.6°C | 29.4°C | 6.4°C | 12 mm | 66% | 3.1 m/s | 3.1 |
| 2004 | 19.0°C | 14.1°C | 9.3°C | 22.6°C | 6.3°C | 15 mm | 68% | 3.2 m/s | 3.1 |
| 2003 | 19.6°C | 15.1°C | 10.6°C | 25.7°C | 6.3°C | 40 mm | 70% | 3.3 m/s | 3 |
| 2002 | 20.3°C | 15.8°C | 11.3°C | 28.5°C | 6.8°C | 45 mm | 61% | 3.3 m/s | 2.9 |
| 2001 | 18.9°C | 14.5°C | 10.1°C | 26.1°C | 5.2°C | 44 mm | 70% | 3.1 m/s | 3 |
| 2000 | 17.8°C | 13.7°C | 9.5°C | 23.8°C | 6.6°C | 33 mm | 74% | 3.5 m/s | 3 |
| 1999 | 20.0°C | 15.3°C | 10.6°C | 26.0°C | 6.7°C | 29 mm | 64% | 3.5 m/s | 2.9 |
| 1998 | 19.7°C | 15.0°C | 10.3°C | 24.7°C | 7.1°C | 7 mm | 66% | 3.1 m/s | 3.1 |
| 1997 | 17.9°C | 13.9°C | 10.0°C | 27.5°C | 5.6°C | 37 mm | 74% | 2.9 m/s | 2.7 |
| 1996 | 19.4°C | 14.6°C | 9.8°C | 26.8°C | 5.9°C | 8 mm | 69% | 2.7 m/s | 3.1 |
| 1995 | 17.3°C | 13.3°C | 9.2°C | 23.9°C | 5.6°C | 38 mm | 72% | 3.5 m/s | 2.9 |
| 1994 | 19.7°C | 15.0°C | 10.2°C | 27.5°C | 6.8°C | 11 mm | 64% | 4.1 m/s | 3.3 |
| 1993 | 19.7°C | 15.0°C | 10.2°C | 27.0°C | 6.3°C | 30 mm | 68% | 2.9 m/s | 3.1 |
| 1992 | 17.7°C | 13.6°C | 9.5°C | 25.6°C | 5.6°C | 38 mm | 74% | 3.2 m/s | 3 |
| 1991 | 19.0°C | 14.5°C | 9.9°C | 23.2°C | 7.0°C | 16 mm | 67% | 2.8 m/s | 3.1 |
| 1990 | 20.2°C | 15.6°C | 11.0°C | 28.3°C | 5.6°C | 23 mm | 68% | 3.8 m/s | 3.1 |
| 1989 🌧️ | 18.2°C | 14.2°C | 10.2°C | 22.2°C | 8.3°C | 54 mm | 77% | 3.2 m/s | 2.9 |
| 1988 | 19.9°C | 15.5°C | 11.2°C | 28.6°C | 7.1°C | 37 mm | 71% | 3.7 m/s | 2.7 |
| 1987 | 18.3°C | 13.8°C | 9.3°C | 24.1°C | 4.3°C | 46 mm | 73% | 3.8 m/s | 2.9 |
| 1986 | 19.0°C | 14.3°C | 9.6°C | 24.6°C | 6.4°C | 25 mm | 69% | 3.3 m/s | 3 |
| 1985 | 18.6°C | 13.6°C | 8.6°C | 25.8°C | 4.7°C | 9 mm | 63% | 3 m/s | 3.3 |
| 1984 | 19.3°C | 14.5°C | 9.7°C | 25.8°C | 7.3°C | 16 mm | 66% | 3.4 m/s | 3 |
| 1983 | 18.4°C | 13.9°C | 9.3°C | 22.8°C | 6.5°C | 27 mm | 75% | 3.3 m/s | — |
| 1982 | 19.0°C | 14.3°C | 9.5°C | 25.7°C | 6.5°C | 17 mm | 66% | 3.5 m/s | — |
| 1981 | 18.8°C | 14.3°C | 9.9°C | 26.6°C | 5.7°C | 43 mm | 66% | 4.1 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 19.1°C with lows near 10°C (mean 14.6°C), based on 45 years of NASA POWER data.
May averages 26 mm of rainfall in Cowell, about average for rainfall. The wettest on record was 54 mm in 1989.
The hottest May reached 29.4°C in 2005. The coldest dipped to 4.3°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.8°C. Daytime highs moved from 18.8°C to 19.7°C and overnight lows from 9.4°C to 10°C over the same span.
May is one of the cooler months of the year in Cowell and about average for rainfall, so plan for around 19.1°C daytime highs and 10°C at night.
Not quite — May is the 5th coolest month in Cowell, averaging 14.6°C.
For May in Cowell, pack light layers you can adjust through the day, with typical highs of 19.1°C and lows of 10°C.
Relative humidity in May averages 69% — moderately humid.
Average wind speed in May is 3.3 m/s. The windiest May on record averaged 4.3 m/s (2007).
The wettest May on record was 1989 with 54 mm. On average, May sees 26 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 Cowell 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.
