May is one of the cooler months of the year in Bordertown, with average highs near 18.1°C and lows around 8.1°C (mean 13.1°C). It is about average for rainfall, averaging 45 mm of rainfall and 74% relative humidity across the period.
May is one of the cooler months of the year in Bordertown. Across 45 years of records, the warmest May in Bordertown was 2007 — when the month averaged 14.7°C — while the coldest was 2006 at 11.1°C. Typical May days reach 18.1°C with nights near 8.1°C. The long-term May temperature trend is broadly flat.
May is about average for rainfall in Bordertown, averaging 45 mm of rainfall. The wettest May on record was 1987 with 112 mm, while the driest was 1991 at 8 mm.
Relative humidity in Bordertown during May averages 74%. The most humid May was 1983 at 82%, and the least humid was 2025 at 65%.
May receives about 2.6 kWh/m²/day of solar energy in Bordertown. The sunniest Mays were 2024 and 2025 at 3 kWh/m²/day, and the cloudiest was 2018 at 2.3.
Average wind speed in Bordertown during May is 2.7 m/s. The windiest May was 2016 at 3.7 m/s, while the calmest were 1996, 2001 and 2024, among others at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 13.0°C | 13.0°C | 13.1°C | 13.2°C | 13.0°C | 0°C |
| Avg High | 17.9°C | 18.0°C | 18.2°C | 18.1°C | 18.3°C | +0.4°C |
| Avg Low | 8.1°C | 7.9°C | 8.0°C | 8.4°C | 7.7°C | -0.4°C |
| Avg Rain | 66 mm | 39 mm | 46 mm | 42 mm | 25 mm | -41 mm |
May temperatures in Bordertown have risen by about 0.7°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 1.9°C (2006) to a record high of 28.9°C (2005).
Rainfall in May is about average for rainfall, averaging 45 mm, with a wettest year of 112 mm.
A good time to visit Bordertown
May is a good time to visit Bordertown, with days averaging 18.1°C and nights around 8.1°C (mean 13.1°C, cooler than Bordertown's yearly average) and moderate rainfall. February and January 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 | 20.1°C | 13.9°C | 7.7°C | 27.3°C | 2.4°C | 13 mm | 65% | 2.6 m/s | 3 |
| 2024 | 19.5°C | 13.4°C | 7.2°C | 22.4°C | 3.1°C | 14 mm | 69% | 2.1 m/s | 3 |
| 2023 | 17.5°C | 12.8°C | 8.1°C | 22.7°C | 2.8°C | 25 mm | 74% | 2.7 m/s | 2.5 |
| 2022 | 17.8°C | 13.2°C | 8.7°C | 23.3°C | 5.3°C | 43 mm | 77% | 2.8 m/s | 2.6 |
| 2021 | 18.4°C | 13.2°C | 8.1°C | 23.3°C | 2.1°C | 12 mm | 67% | 3.1 m/s | 2.6 |
| 2020 | 16.5°C | 11.5°C | 6.5°C | 21.6°C | 2.3°C | 46 mm | 75% | 3.1 m/s | 2.8 |
| 2019 | 18.6°C | 13.5°C | 8.5°C | 26.5°C | 4.7°C | 33 mm | 73% | 3.2 m/s | 2.6 |
| 2018 | 18.3°C | 13.6°C | 8.9°C | 24.9°C | 4.7°C | 27 mm | 70% | 3.2 m/s | 2.3 |
| 2017 | 17.7°C | 12.6°C | 7.6°C | 22.7°C | 3.4°C | 21 mm | 71% | 2.6 m/s | 2.6 |
| 2016 | 18.7°C | 14.4°C | 10.0°C | 25.5°C | 2.3°C | 40 mm | 72% | 3.7 m/s | 2.4 |
| 2015 | 17.5°C | 12.9°C | 8.3°C | 25.3°C | 4.4°C | 61 mm | 76% | 3.4 m/s | 2.7 |
| 2014 | 19.3°C | 14.5°C | 9.6°C | 25.0°C | 3.9°C | 43 mm | 75% | 2.6 m/s | 2.5 |
| 2013 | 18.7°C | 13.6°C | 8.5°C | 27.1°C | 4.3°C | 73 mm | 73% | 2.8 m/s | 2.6 |
| 2012 | 17.4°C | 12.4°C | 7.3°C | 25.2°C | 3.2°C | 53 mm | 77% | 2.7 m/s | 2.6 |
| 2011 | 16.4°C | 11.8°C | 7.2°C | 22.3°C | 2.9°C | 34 mm | 76% | 2.4 m/s | 2.5 |
| 2010 | 18.4°C | 13.1°C | 7.8°C | 24.7°C | 3.8°C | 35 mm | 75% | 2.4 m/s | 2.7 |
| 2009 | 18.0°C | 13.3°C | 8.6°C | 22.1°C | 4.8°C | 19 mm | 80% | 2.3 m/s | 2.5 |
| 2008 | 18.3°C | 13.2°C | 8.2°C | 23.9°C | 2.8°C | 50 mm | 77% | 2.2 m/s | 2.5 |
| 2007 🔥 | 19.4°C | 14.7°C | 10.1°C | 24.7°C | 6.3°C | 98 mm | 75% | 3.4 m/s | 2.5 |
| 2006 ❄️ | 15.9°C | 11.1°C | 6.3°C | 20.2°C | 1.9°C | 38 mm | 80% | 2.4 m/s | 2.4 |
| 2005 | 19.5°C | 13.7°C | 7.8°C | 28.9°C | 4.1°C | 9 mm | 70% | 2.3 m/s | 2.8 |
| 2004 | 17.4°C | 12.3°C | 7.2°C | 22.0°C | 3.3°C | 36 mm | 76% | 2.8 m/s | 2.7 |
| 2003 | 18.9°C | 13.5°C | 8.2°C | 23.7°C | 3.2°C | 31 mm | 72% | 2.5 m/s | 2.5 |
| 2002 | 19.3°C | 13.9°C | 8.5°C | 27.4°C | 2.3°C | 48 mm | 66% | 2.5 m/s | 2.7 |
| 2001 | 17.9°C | 12.9°C | 7.9°C | 26.2°C | 5.2°C | 44 mm | 75% | 2.1 m/s | 2.4 |
| 2000 | 16.9°C | 12.2°C | 7.6°C | 23.7°C | 2.6°C | 84 mm | 78% | 3 m/s | 2.6 |
| 1999 | 19.1°C | 13.9°C | 8.7°C | 25.7°C | 3.7°C | 64 mm | 71% | 3.1 m/s | 2.6 |
| 1998 | 18.0°C | 12.9°C | 7.8°C | 24.4°C | 3.7°C | 33 mm | 75% | 2.4 m/s | 2.4 |
| 1997 | 17.4°C | 12.7°C | 8.0°C | 24.6°C | 3.4°C | 74 mm | 78% | 2.4 m/s | 2.4 |
| 1996 | 18.6°C | 13.3°C | 7.9°C | 25.4°C | 4.5°C | 19 mm | 75% | 2.1 m/s | 2.5 |
| 1995 | 16.7°C | 12.2°C | 7.6°C | 21.0°C | 3.7°C | 43 mm | 78% | 2.7 m/s | 2.5 |
| 1994 | 17.8°C | 12.9°C | 8.0°C | 26.6°C | 3.1°C | 51 mm | 70% | 3.6 m/s | 2.7 |
| 1993 | 18.8°C | 13.3°C | 7.9°C | 26.0°C | 3.4°C | 35 mm | 72% | 2.4 m/s | 2.8 |
| 1992 | 16.7°C | 12.1°C | 7.5°C | 24.9°C | 3.1°C | 49 mm | 79% | 2.3 m/s | 2.5 |
| 1991 | 18.4°C | 12.9°C | 7.3°C | 22.2°C | 4.8°C | 8 mm | 73% | 2.1 m/s | 2.6 |
| 1990 | 18.7°C | 13.4°C | 8.2°C | 27.3°C | 3.2°C | 15 mm | 69% | 2.8 m/s | 2.7 |
| 1989 | 18.2°C | 13.6°C | 9.0°C | 22.5°C | 3.5°C | 52 mm | 77% | 2.9 m/s | 2.5 |
| 1988 | 19.5°C | 14.6°C | 9.8°C | 28.1°C | 5.6°C | 102 mm | 77% | 2.6 m/s | 2.4 |
| 1987 🌧️ | 17.4°C | 12.9°C | 8.5°C | 25.0°C | 2.8°C | 112 mm | 77% | 3.3 m/s | 2.5 |
| 1986 | 17.6°C | 12.6°C | 7.6°C | 22.8°C | 4.0°C | 52 mm | 79% | 2.5 m/s | 2.6 |
| 1985 | 17.6°C | 12.6°C | 7.6°C | 26.7°C | 2.3°C | 62 mm | 74% | 2.7 m/s | 2.7 |
| 1984 | 18.6°C | 13.3°C | 8.0°C | 25.0°C | 4.3°C | 39 mm | 70% | 2.7 m/s | 2.7 |
| 1983 | 16.9°C | 12.1°C | 7.3°C | 20.2°C | 2.0°C | 68 mm | 82% | 2.7 m/s | — |
| 1982 | 17.2°C | 12.3°C | 7.5°C | 23.2°C | 2.3°C | 50 mm | 72% | 2.9 m/s | — |
| 1981 | 18.0°C | 12.8°C | 7.7°C | 25.3°C | 2.8°C | 60 mm | 70% | 3 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 18.1°C with lows near 8.1°C (mean 13.1°C), based on 45 years of NASA POWER data.
May averages 45 mm of rainfall in Bordertown, about average for rainfall. The wettest on record was 112 mm in 1987.
The hottest May reached 28.9°C in 2005. The coldest dipped to 1.9°C in 2006.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.7°C. Daytime highs moved from 17.7°C to 18.7°C and overnight lows from 7.6°C to 8°C over the same span.
May is one of the cooler months of the year in Bordertown and about average for rainfall, so plan for around 18.1°C daytime highs and 8.1°C at night.
Not quite — May is the 5th coolest month in Bordertown, averaging 13.1°C.
For May in Bordertown, pack light layers you can adjust through the day, with typical highs of 18.1°C and lows of 8.1°C.
Relative humidity in May averages 74% — moderately humid.
Average wind speed in May is 2.7 m/s. The windiest May on record averaged 3.7 m/s (2016).
The wettest May on record was 1987 with 112 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 Bordertown 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.
