August is one of the cooler months of the year in Kelso, with average highs near 12°C and lows around 2.3°C (mean 7.2°C). It is about average for rainfall, averaging 58 mm of rainfall and 78% relative humidity across the period.
August is one of the cooler months of the year in Kelso. Across 45 years of records, the warmest August in Kelso was 2024 — when the month averaged 10.2°C — while the coldest was 1990 at 5°C. Typical August days reach 12°C with nights near 2.3°C. The long-term trend is warming, about 0.3°C per decade.
August is about average for rainfall in Kelso, averaging 58 mm of rainfall. The wettest August on record was 1990 with 178 mm, while the driest was 1982 at 4 mm.
Relative humidity in Kelso during August averages 78%. The most humid August was 1990 at 89%, and the least humid was 1982 at 60%.
August receives about 3.6 kWh/m²/day of solar energy in Kelso. The sunniest August was 1995 at 4.1 kWh/m²/day, and the cloudiest was 1990 at 3.
Average wind speed in Kelso during August is 0.6 m/s. The windiest August was 1991 at 0.8 m/s, while the calmest was 2023 at 0.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 6.8°C | 6.7°C | 7.2°C | 7.1°C | 8.3°C | +1.5°C |
| Avg High | 11.5°C | 11.5°C | 12.4°C | 12.2°C | 12.9°C | +1.4°C |
| Avg Low | 2.2°C | 1.9°C | 2.1°C | 2.0°C | 3.7°C | +1.5°C |
| Avg Rain | 79 mm | 80 mm | 48 mm | 40 mm | 37 mm | -42 mm |
August temperatures in Kelso have risen by about 1.8°C between 1981–1985 and 2021–2025.
August has ranged from a record low of -4.1°C (2008) to a record high of 22°C (2024).
Rainfall in August is about average for rainfall, averaging 58 mm, with a wettest year of 178 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.4°C per decade while lows rose 0.2°C per decade, widening the gap between day and night.
A quieter season to visit Kelso
If your dates are flexible, the more temperate months of January and February tend to be the most comfortable for visiting Kelso. That said, August — with days averaging 12°C and nights around 2.3°C (mean 7.2°C) and moderate rainfall (58 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 12.6°C | 8.2°C | 3.8°C | 19.1°C | -1.7°C | 39 mm | 80% | 0.6 m/s | 3.3 |
| 2024 🔥 | 15.1°C | 10.2°C | 5.4°C | 22.0°C | 0.3°C | 31 mm | 77% | 0.6 m/s | 3.5 |
| 2023 | 15.0°C | 9.8°C | 4.6°C | 18.8°C | 0.0°C | 25 mm | 75% | 0.5 m/s | 3.7 |
| 2022 | 11.9°C | 7.8°C | 3.6°C | 17.2°C | -0.6°C | 61 mm | 84% | 0.6 m/s | 3.1 |
| 2021 | 12.4°C | 7.5°C | 2.7°C | 19.0°C | -0.6°C | 25 mm | 79% | 0.7 m/s | 3.6 |
| 2020 | 10.7°C | 6.3°C | 1.9°C | 17.4°C | -2.8°C | 41 mm | 81% | 0.7 m/s | 3.5 |
| 2019 | 13.0°C | 7.3°C | 1.6°C | 19.3°C | -1.7°C | 8 mm | 66% | 0.7 m/s | 3.9 |
| 2018 | 12.1°C | 6.7°C | 1.2°C | 16.9°C | -2.8°C | 21 mm | 69% | 0.7 m/s | 3.6 |
| 2017 | 12.5°C | 6.9°C | 1.2°C | 17.7°C | -3.4°C | 12 mm | 67% | 0.7 m/s | 4 |
| 2016 | 12.6°C | 7.5°C | 2.4°C | 17.3°C | -1.5°C | 49 mm | 77% | 0.6 m/s | 3.3 |
| 2015 | 11.8°C | 7.0°C | 2.2°C | 18.9°C | -2.9°C | 24 mm | 80% | 0.6 m/s | 3.2 |
| 2014 | 12.6°C | 7.4°C | 2.3°C | 16.3°C | -2.4°C | 43 mm | 80% | 0.6 m/s | 3.7 |
| 2013 | 12.0°C | 7.3°C | 2.6°C | 18.8°C | -1.2°C | 33 mm | 78% | 0.7 m/s | 3.6 |
| 2012 | 11.1°C | 6.1°C | 1.1°C | 17.9°C | -1.6°C | 35 mm | 77% | 0.7 m/s | 3.9 |
| 2011 | 14.0°C | 9.0°C | 4.1°C | 18.7°C | 1.4°C | 64 mm | 76% | 0.6 m/s | 3.5 |
| 2010 | 9.9°C | 5.7°C | 1.4°C | 14.2°C | -1.8°C | 110 mm | 84% | 0.7 m/s | 3.4 |
| 2009 | 14.1°C | 8.4°C | 2.8°C | 20.5°C | -1.0°C | 11 mm | 68% | 0.7 m/s | 3.9 |
| 2008 | 9.9°C | 5.3°C | 0.6°C | 16.3°C | -4.1°C | 47 mm | 79% | 0.6 m/s | 3.3 |
| 2007 | 13.3°C | 8.6°C | 3.9°C | 20.0°C | -0.7°C | 34 mm | 77% | 0.7 m/s | 3.6 |
| 2006 | 13.9°C | 7.9°C | 2.0°C | 18.3°C | -1.7°C | 9 mm | 69% | 0.6 m/s | 4 |
| 2005 | 12.8°C | 7.1°C | 1.5°C | 17.5°C | -2.8°C | 31 mm | 74% | 0.6 m/s | 3.8 |
| 2004 | 11.6°C | 7.0°C | 2.5°C | 19.3°C | -0.1°C | 67 mm | 77% | 0.7 m/s | 3.3 |
| 2003 | 12.0°C | 6.9°C | 1.7°C | 16.7°C | -3.9°C | 99 mm | 78% | 0.7 m/s | 3.4 |
| 2002 | 14.0°C | 8.2°C | 2.3°C | 18.0°C | -2.7°C | 19 mm | 67% | 0.6 m/s | 3.8 |
| 2001 | 11.4°C | 6.5°C | 1.7°C | 16.5°C | -2.7°C | 66 mm | 76% | 0.7 m/s | 3.3 |
| 2000 | 10.7°C | 6.5°C | 2.3°C | 13.9°C | -2.6°C | 97 mm | 84% | 0.6 m/s | 3.3 |
| 1999 | 12.7°C | 7.6°C | 2.5°C | 18.1°C | -1.8°C | 78 mm | 77% | 0.6 m/s | 3.7 |
| 1998 | 12.4°C | 8.3°C | 4.2°C | 16.3°C | -1.8°C | 145 mm | 86% | 0.6 m/s | 3.3 |
| 1997 | 11.8°C | 6.4°C | 1.1°C | 16.7°C | -2.7°C | 39 mm | 74% | 0.6 m/s | 3.7 |
| 1996 | 10.5°C | 6.0°C | 1.5°C | 16.0°C | -2.3°C | 93 mm | 82% | 0.7 m/s | 3.4 |
| 1995 | 14.3°C | 8.5°C | 2.7°C | 20.9°C | -2.8°C | 9 mm | 76% | 0.6 m/s | 4.1 |
| 1994 | 11.7°C | 6.1°C | 0.6°C | 18.5°C | -3.1°C | 14 mm | 72% | 0.6 m/s | 3.9 |
| 1993 | 12.5°C | 7.7°C | 2.8°C | 16.9°C | -1.9°C | 40 mm | 80% | 0.6 m/s | 3.8 |
| 1992 | 10.5°C | 5.7°C | 0.9°C | 16.2°C | -3.1°C | 101 mm | 80% | 0.7 m/s | 3.5 |
| 1991 | 9.9°C | 5.5°C | 1.1°C | 16.5°C | -2.6°C | 102 mm | 81% | 0.8 m/s | 3.6 |
| 1990 ❄️ 🌧️ | 8.4°C | 5.0°C | 1.6°C | 14.0°C | -2.2°C | 178 mm | 89% | 0.7 m/s | 3 |
| 1989 | 9.1°C | 5.1°C | 1.1°C | 14.2°C | -2.5°C | 57 mm | 85% | 0.6 m/s | 3.4 |
| 1988 | 12.5°C | 7.5°C | 2.5°C | 18.5°C | -3.9°C | 74 mm | 81% | 0.6 m/s | 3.7 |
| 1987 | 12.0°C | 7.8°C | 3.7°C | 15.3°C | -0.2°C | 115 mm | 86% | 0.6 m/s | 3.1 |
| 1986 | 11.0°C | 6.5°C | 1.9°C | 16.4°C | -2.0°C | 167 mm | 80% | 0.7 m/s | 3.7 |
| 1985 | 10.8°C | 6.3°C | 1.9°C | 16.4°C | -3.0°C | 109 mm | 83% | 0.6 m/s | 3.4 |
| 1984 | 10.1°C | 6.2°C | 2.2°C | 14.6°C | 0.4°C | 77 mm | 84% | 0.7 m/s | 3.3 |
| 1983 | 12.0°C | 7.3°C | 2.6°C | 16.3°C | -1.7°C | 51 mm | 82% | 0.6 m/s | — |
| 1982 | 16.2°C | 9.8°C | 3.3°C | 21.6°C | -0.4°C | 4 mm | 60% | 0.6 m/s | — |
| 1981 | 9.4°C | 5.1°C | 0.8°C | 14.6°C | -1.9°C | 57 mm | 82% | 0.7 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 12°C with lows near 2.3°C (mean 7.2°C), based on 45 years of NASA POWER data.
August averages 58 mm of rainfall in Kelso, about average for rainfall. The wettest on record was 178 mm in 1990.
The hottest August reached 22°C in 2024. The coldest dipped to -4.1°C in 2008.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.8°C. Daytime highs moved from 11.7°C to 13.4°C and overnight lows from 2.2°C to 4°C over the same span.
August is one of the cooler months of the year in Kelso and about average for rainfall, so plan for around 12°C daytime highs and 2.3°C at night.
Not quite — August is the 3rd coolest month in Kelso, averaging 7.2°C.
For August in Kelso, pack warm layers and a jacket for chilly mornings, with typical highs of 12°C and lows of 2.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 78% — quite humid.
Average wind speed in August is 0.6 m/s. The windiest August on record averaged 0.8 m/s (1991).
The wettest August on record was 1990 with 178 mm. On average, August sees 58 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 August, 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 August specifically, along with year-by-year records and how the month has changed over the decades.
