May is one of the cooler months of the year in Kelso, with average highs near 14.9°C and lows around 5.4°C (mean 10.2°C). It is one of the drier months, averaging 44 mm of rainfall and 77% relative humidity across the period.
May is one of the cooler months of the year in Kelso. Across 45 years of records, the warmest Mays in Kelso were 2007 and 2025 — when the month averaged 11.8°C — while the coldest was 2023 at 8.3°C. Typical May days reach 14.9°C with nights near 5.4°C. The long-term May temperature trend is broadly flat.
May is one of the drier months in Kelso, averaging 44 mm of rainfall. The wettest May on record was 1995 with 138 mm, while the driest was 2005 at 4 mm.
Relative humidity in Kelso during May averages 77%. The most humid May was 1989 at 89%, and the least humid was 1982 at 67%.
May receives about 3.1 kWh/m²/day of solar energy in Kelso. The sunniest Mays were 2004, 2005 and 2012 at 3.5 kWh/m²/day, and the cloudiest were 1998, 2002 and 2022, among others at 2.7.
Average wind speed in Kelso during May is 0.6 m/s. The windiest May was 2016 at 0.7 m/s, while the calmest were 2017, 2021 and 2025, among others at 0.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.2°C | 10.4°C | 10.2°C | 10.0°C | 10.0°C | -0.2°C |
| Avg High | 14.8°C | 15.1°C | 15.2°C | 14.8°C | 14.6°C | -0.2°C |
| Avg Low | 5.6°C | 5.8°C | 5.3°C | 5.1°C | 5.4°C | -0.2°C |
| Avg Rain | 65 mm | 55 mm | 32 mm | 32 mm | 33 mm | -31 mm |
May temperatures in Kelso have risen by about 0.3°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -2.6°C (2021) to a record high of 22.4°C (2016).
Rainfall in May is one of the drier months, averaging 44 mm, with a wettest year of 138 mm.
A good time to visit Kelso
May is a good time to visit Kelso, with days averaging 14.9°C and nights around 5.4°C (mean 10.2°C, cooler than Kelso's yearly average) and moderate rainfall. January and February 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 | 16.5°C | 11.8°C | 7.2°C | 20.2°C | 3.7°C | 60 mm | 78% | 0.5 m/s | 2.9 |
| 2024 | 15.5°C | 10.8°C | 6.2°C | 17.9°C | 0.2°C | 50 mm | 80% | 0.6 m/s | 3 |
| 2023 ❄️ | 13.1°C | 8.3°C | 3.6°C | 17.7°C | -0.1°C | 7 mm | 77% | 0.6 m/s | 3.1 |
| 2022 | 14.4°C | 10.3°C | 6.3°C | 20.3°C | 0.2°C | 43 mm | 85% | 0.6 m/s | 2.7 |
| 2021 | 14.6°C | 9.7°C | 4.9°C | 19.5°C | -2.6°C | 21 mm | 79% | 0.5 m/s | 3.1 |
| 2020 | 13.4°C | 8.8°C | 4.2°C | 18.7°C | -0.3°C | 20 mm | 82% | 0.6 m/s | 3.2 |
| 2019 | 15.0°C | 10.1°C | 5.2°C | 21.2°C | -0.9°C | 19 mm | 74% | 0.6 m/s | 3.1 |
| 2018 | 16.0°C | 10.5°C | 5.1°C | 21.6°C | 1.5°C | 7 mm | 69% | 0.6 m/s | 3.3 |
| 2017 | 15.7°C | 10.5°C | 5.2°C | 19.1°C | -1.0°C | 10 mm | 74% | 0.5 m/s | 3.3 |
| 2016 | 15.8°C | 10.8°C | 5.8°C | 22.4°C | -1.4°C | 22 mm | 72% | 0.7 m/s | 3.1 |
| 2015 | 13.9°C | 9.7°C | 5.6°C | 20.6°C | 0.1°C | 39 mm | 82% | 0.6 m/s | 2.8 |
| 2014 | 15.4°C | 10.7°C | 6.0°C | 20.6°C | 1.1°C | 39 mm | 79% | 0.6 m/s | 3.1 |
| 2013 | 15.0°C | 10.2°C | 5.3°C | 21.5°C | 1.5°C | 28 mm | 76% | 0.5 m/s | 3.1 |
| 2012 | 13.8°C | 8.6°C | 3.3°C | 19.6°C | 0.2°C | 42 mm | 77% | 0.6 m/s | 3.5 |
| 2011 | 13.3°C | 8.6°C | 4.0°C | 18.9°C | -1.5°C | 58 mm | 79% | 0.6 m/s | 3.1 |
| 2010 | 14.5°C | 9.9°C | 5.2°C | 19.1°C | 0.1°C | 60 mm | 80% | 0.5 m/s | 3.1 |
| 2009 | 15.0°C | 10.6°C | 6.1°C | 18.2°C | 2.2°C | 29 mm | 77% | 0.6 m/s | 3 |
| 2008 | 15.7°C | 10.3°C | 5.0°C | 20.2°C | 1.0°C | 9 mm | 72% | 0.6 m/s | 3.3 |
| 2007 🔥 | 16.8°C | 11.8°C | 6.8°C | 21.3°C | -0.7°C | 65 mm | 73% | 0.6 m/s | 3.2 |
| 2006 | 14.6°C | 9.1°C | 3.7°C | 18.4°C | -1.3°C | 7 mm | 72% | 0.6 m/s | 3.3 |
| 2005 | 16.8°C | 11.2°C | 5.6°C | 21.4°C | 0.7°C | 4 mm | 70% | 0.5 m/s | 3.5 |
| 2004 | 15.0°C | 9.5°C | 3.9°C | 19.5°C | -1.7°C | 40 mm | 67% | 0.6 m/s | 3.5 |
| 2003 | 15.6°C | 10.9°C | 6.1°C | 20.3°C | 0.8°C | 25 mm | 76% | 0.5 m/s | 3 |
| 2002 | 14.2°C | 9.9°C | 5.6°C | 20.6°C | 1.3°C | 45 mm | 78% | 0.5 m/s | 2.7 |
| 2001 | 14.7°C | 9.9°C | 5.1°C | 19.4°C | 0.3°C | 22 mm | 77% | 0.5 m/s | 3 |
| 2000 | 13.6°C | 9.1°C | 4.7°C | 21.5°C | -0.8°C | 77 mm | 82% | 0.6 m/s | 2.8 |
| 1999 | 16.4°C | 11.2°C | 6.0°C | 19.7°C | -2.5°C | 22 mm | 74% | 0.5 m/s | 3.1 |
| 1998 | 14.5°C | 10.1°C | 5.7°C | 18.8°C | -1.1°C | 68 mm | 79% | 0.6 m/s | 2.7 |
| 1997 | 15.5°C | 10.9°C | 6.4°C | 21.7°C | -1.5°C | 51 mm | 77% | 0.5 m/s | 2.8 |
| 1996 | 15.8°C | 11.2°C | 6.5°C | 20.5°C | 0.6°C | 56 mm | 78% | 0.6 m/s | 3 |
| 1995 🌧️ | 13.8°C | 9.9°C | 6.1°C | 19.2°C | 1.7°C | 138 mm | 85% | 0.6 m/s | 2.7 |
| 1994 | 14.8°C | 9.7°C | 4.5°C | 21.4°C | 0.5°C | 15 mm | 72% | 0.6 m/s | 3.3 |
| 1993 | 15.4°C | 10.4°C | 5.4°C | 19.7°C | 0.4°C | 44 mm | 74% | 0.5 m/s | 3.3 |
| 1992 | 14.1°C | 9.8°C | 5.4°C | 19.8°C | 0.3°C | 34 mm | 81% | 0.5 m/s | 3 |
| 1991 | 15.9°C | 10.9°C | 5.9°C | 19.9°C | 0.1°C | 41 mm | 75% | 0.5 m/s | 2.9 |
| 1990 | 14.5°C | 10.3°C | 6.1°C | 19.2°C | -0.3°C | 82 mm | 86% | 0.6 m/s | 3.1 |
| 1989 | 14.9°C | 11.4°C | 7.9°C | 18.7°C | -0.1°C | 83 mm | 89% | 0.5 m/s | 2.7 |
| 1988 | 15.1°C | 10.6°C | 6.2°C | 21.4°C | 1.8°C | 63 mm | 82% | 0.5 m/s | 2.8 |
| 1987 | 13.9°C | 9.4°C | 5.0°C | 19.1°C | -2.2°C | 78 mm | 80% | 0.6 m/s | 3 |
| 1986 | 15.6°C | 10.6°C | 5.6°C | 19.4°C | 1.0°C | 52 mm | 76% | 0.6 m/s | 3.2 |
| 1985 | 15.1°C | 10.4°C | 5.7°C | 20.5°C | 0.9°C | 47 mm | 78% | 0.6 m/s | 3.1 |
| 1984 | 14.3°C | 9.6°C | 4.8°C | 19.3°C | 0.5°C | 30 mm | 79% | 0.5 m/s | 3.2 |
| 1983 | 14.2°C | 9.9°C | 5.7°C | 18.3°C | 0.5°C | 119 mm | 84% | 0.6 m/s | — |
| 1982 | 15.1°C | 9.5°C | 4.0°C | 19.1°C | -1.6°C | 18 mm | 67% | 0.6 m/s | — |
| 1981 | 14.7°C | 10.0°C | 5.4°C | 20.1°C | -0.2°C | 91 mm | 77% | 0.6 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 14.9°C with lows near 5.4°C (mean 10.2°C), based on 45 years of NASA POWER data.
May averages 44 mm of rainfall in Kelso, one of the drier months. The wettest on record was 138 mm in 1995.
The hottest May reached 22.4°C in 2016. The coldest dipped to -2.6°C in 2021.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.3°C. Daytime highs moved from 14.7°C to 14.8°C and overnight lows from 5.1°C to 5.6°C over the same span.
May is one of the cooler months of the year in Kelso and one of the drier months, so plan for around 14.9°C daytime highs and 5.4°C at night.
Not quite — May is the 5th coolest month in Kelso, averaging 10.2°C.
For May in Kelso, pack warm layers and a jacket for chilly mornings, with typical highs of 14.9°C and lows of 5.4°C.
Relative humidity in May averages 77% — quite humid.
Average wind speed in May is 0.6 m/s. The windiest May on record averaged 0.7 m/s (2016).
The wettest May on record was 1995 with 138 mm. On average, May sees 44 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 Kelso 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.
