August is one of the warmer months of the year in Ballymena, with average highs near 16.8°C and lows around 11.8°C (mean 14.3°C). It is about average for rainfall, averaging 101 mm of rainfall and 86% relative humidity across the period.
August is one of the warmer months of the year in Ballymena. Across 45 years of records, the warmest August in Ballymena was 1995 — when the month averaged 16.4°C — while the coldest was 1986 at 11.8°C. Typical August days reach 16.8°C with nights near 11.8°C. The long-term trend is warming, about 0.2°C per decade.
August is about average for rainfall in Ballymena, averaging 101 mm of rainfall. The wettest August on record was 2009 with 193 mm, while the driest was 1995 at 22 mm.
Relative humidity in Ballymena during August averages 86%. The most humid Augusts were 1996 and 2008 at 89%, and the least humid was 2022 at 83%.
August receives about 3.6 kWh/m²/day of solar energy in Ballymena. The sunniest August was 1995 at 4.6 kWh/m²/day, and the cloudiest was 2008 at 3.
Average wind speed in Ballymena during August is 4.1 m/s. The windiest August was 1985 at 5.4 m/s, while the calmest was 1983 at 2.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 13.8°C | 14.3°C | 14.5°C | 14.0°C | 15.1°C | +1.3°C |
| Avg High | 16.3°C | 16.8°C | 16.9°C | 16.4°C | 17.6°C | +1.3°C |
| Avg Low | 11.3°C | 11.8°C | 12.1°C | 11.5°C | 12.5°C | +1.2°C |
| Avg Rain | 106 mm | 83 mm | 114 mm | 107 mm | 95 mm | -11 mm |
August temperatures in Ballymena have risen by about 0.9°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 7.3°C (1993) to a record high of 23.6°C (1995).
Rainfall in August is about average for rainfall, averaging 101 mm, with a wettest year of 193 mm.
One of the best times to visit Ballymena
August is one of the best times to visit Ballymena. Expect days averaging 16.8°C and nights around 11.8°C (mean 14.3°C) — warmer than Ballymena's yearly average — with higher rainfall (101 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 18.5°C | 15.8°C | 13.1°C | 22.2°C | 10.7°C | 63 mm | 86% | 4.3 m/s | 3.8 |
| 2024 | 17.0°C | 14.3°C | 11.7°C | 19.8°C | 9.5°C | 125 mm | 86% | 5.1 m/s | 3.5 |
| 2023 | 17.3°C | 15.0°C | 12.7°C | 20.9°C | 10.8°C | 93 mm | 86% | 4.5 m/s | 3.8 |
| 2022 | 18.4°C | 15.6°C | 12.7°C | 22.6°C | 10.7°C | 43 mm | 83% | 3.2 m/s | 4.5 |
| 2021 | 17.5°C | 15.0°C | 12.5°C | 20.5°C | 10.6°C | 91 mm | 87% | 3.1 m/s | 3.5 |
| 2020 | 17.1°C | 14.7°C | 12.2°C | 20.7°C | 8.8°C | 153 mm | 88% | 3.7 m/s | 3.5 |
| 2019 | 17.4°C | 14.8°C | 12.2°C | 21.3°C | 9.2°C | 136 mm | 87% | 4.6 m/s | 3.9 |
| 2018 | 16.6°C | 14.1°C | 11.6°C | 20.2°C | 9.0°C | 109 mm | 86% | 4 m/s | 3.4 |
| 2017 | 16.3°C | 13.8°C | 11.3°C | 18.4°C | 9.2°C | 119 mm | 86% | 4.3 m/s | 3.6 |
| 2016 | 17.1°C | 14.7°C | 12.3°C | 19.3°C | 9.9°C | 91 mm | 87% | 4.4 m/s | 3.6 |
| 2015 | 16.1°C | 13.4°C | 10.7°C | 19.1°C | 8.1°C | 126 mm | 86% | 4 m/s | 3.6 |
| 2014 | 15.4°C | 13.2°C | 11.0°C | 18.3°C | 8.7°C | 135 mm | 85% | 5 m/s | 3.7 |
| 2013 | 16.9°C | 14.4°C | 12.0°C | 19.9°C | 10.1°C | 72 mm | 86% | 4 m/s | 3.5 |
| 2012 | 16.9°C | 14.6°C | 12.3°C | 19.1°C | 9.4°C | 118 mm | 88% | 4.1 m/s | 3.8 |
| 2011 | 15.5°C | 13.2°C | 10.9°C | 18.7°C | 8.7°C | 85 mm | 85% | 3.6 m/s | 3.5 |
| 2010 | 15.8°C | 13.4°C | 11.1°C | 19.1°C | 8.5°C | 78 mm | 85% | 4.2 m/s | 4.1 |
| 2009 🌧️ | 16.9°C | 14.4°C | 12.0°C | 19.7°C | 9.6°C | 193 mm | 87% | 4.8 m/s | 3.4 |
| 2008 | 16.6°C | 14.6°C | 12.6°C | 19.9°C | 10.4°C | 184 mm | 89% | 4 m/s | 3 |
| 2007 | 16.1°C | 13.8°C | 11.6°C | 19.2°C | 9.4°C | 120 mm | 87% | 4.4 m/s | 3.5 |
| 2006 | 16.4°C | 14.3°C | 12.3°C | 21.7°C | 9.8°C | 87 mm | 87% | 4.4 m/s | 3.4 |
| 2005 | 16.8°C | 14.2°C | 11.6°C | 19.9°C | 9.4°C | 110 mm | 87% | 4.1 m/s | 3.6 |
| 2004 | 17.2°C | 15.1°C | 12.9°C | 20.0°C | 10.5°C | 141 mm | 88% | 4 m/s | 3.4 |
| 2003 | 17.9°C | 15.2°C | 12.4°C | 22.3°C | 9.4°C | 34 mm | 85% | 3.4 m/s | 4 |
| 2002 | 17.3°C | 14.8°C | 12.2°C | 22.0°C | 10.0°C | 68 mm | 87% | 3.3 m/s | 3.4 |
| 2001 | 16.6°C | 14.0°C | 11.4°C | 20.2°C | 9.4°C | 110 mm | 87% | 3.4 m/s | 3.5 |
| 2000 | 17.3°C | 14.6°C | 11.9°C | 19.7°C | 9.8°C | 92 mm | 86% | 3.2 m/s | 4 |
| 1999 | 16.5°C | 14.1°C | 11.8°C | 19.9°C | 9.4°C | 91 mm | 86% | 4 m/s | 3.6 |
| 1998 | 16.7°C | 14.2°C | 11.7°C | 20.1°C | 8.9°C | 94 mm | 87% | 4.7 m/s | 3.7 |
| 1997 | 18.4°C | 15.7°C | 12.9°C | 21.4°C | 9.7°C | 59 mm | 86% | 3.7 m/s | 3.9 |
| 1996 | 16.1°C | 13.8°C | 11.4°C | 20.0°C | 9.5°C | 99 mm | 89% | 3.8 m/s | 3.4 |
| 1995 🔥 | 19.4°C | 16.4°C | 13.4°C | 23.6°C | 10.8°C | 22 mm | 84% | 3.4 m/s | 4.6 |
| 1994 | 15.9°C | 13.5°C | 11.0°C | 19.8°C | 8.8°C | 88 mm | 85% | 3.7 m/s | 3.9 |
| 1993 | 15.2°C | 12.7°C | 10.2°C | 19.8°C | 7.3°C | 69 mm | 85% | 3.9 m/s | 3.7 |
| 1992 | 15.5°C | 13.0°C | 10.5°C | 18.3°C | 7.8°C | 150 mm | 85% | 5 m/s | 3.8 |
| 1991 | 17.4°C | 14.8°C | 12.2°C | 21.7°C | 9.5°C | 68 mm | 86% | 3.7 m/s | 3.7 |
| 1990 | 17.3°C | 14.9°C | 12.4°C | 21.9°C | 10.1°C | 90 mm | 86% | 4.1 m/s | 3.4 |
| 1989 | 16.7°C | 14.0°C | 11.4°C | 20.1°C | 9.2°C | 115 mm | 85% | 4.9 m/s | 3.3 |
| 1988 | 15.7°C | 13.2°C | 10.8°C | 19.3°C | 8.3°C | 131 mm | 86% | 4.9 m/s | 3.5 |
| 1987 | 16.2°C | 13.8°C | 11.3°C | 20.8°C | 8.2°C | 123 mm | 86% | 4 m/s | 3.3 |
| 1986 ❄️ | 14.1°C | 11.8°C | 9.6°C | 16.9°C | 7.5°C | 122 mm | 84% | 4.5 m/s | 3.2 |
| 1985 | 14.7°C | 12.6°C | 10.5°C | 18.0°C | 8.1°C | 189 mm | 87% | 5.4 m/s | 3.4 |
| 1984 | 18.1°C | 15.3°C | 12.5°C | 21.8°C | 9.0°C | 87 mm | 84% | 3.3 m/s | 3.7 |
| 1983 | 18.4°C | 15.3°C | 12.3°C | 21.3°C | 9.3°C | 39 mm | 84% | 2.9 m/s | — |
| 1982 | 15.9°C | 13.6°C | 11.3°C | 21.3°C | 7.8°C | 100 mm | 84% | 4.9 m/s | — |
| 1981 | 17.0°C | 14.3°C | 11.6°C | 20.2°C | 8.8°C | 47 mm | 87% | 3.5 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 16.8°C with lows near 11.8°C (mean 14.3°C), based on 45 years of NASA POWER data.
August averages 101 mm of rainfall in Ballymena, about average for rainfall. The wettest on record was 193 mm in 2009.
The hottest August reached 23.6°C in 1995. The coldest dipped to 7.3°C in 1993.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.9°C. Daytime highs moved from 16.8°C to 17.7°C and overnight lows from 11.6°C to 12.5°C over the same span.
August is one of the warmer months of the year in Ballymena and about average for rainfall, so plan for around 16.8°C daytime highs and 11.8°C at night.
Not quite — August is the 12th coolest month in Ballymena, averaging 14.3°C.
For August in Ballymena, pack light layers you can adjust through the day, with typical highs of 16.8°C and lows of 11.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 86% — quite humid.
Average wind speed in August is 4.1 m/s. The windiest August on record averaged 5.4 m/s (1985).
The wettest August on record was 2009 with 193 mm. On average, August sees 101 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 Ballymena 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.
