August is one of the warmer months of the year in Antrim, with average highs near 17.6°C and lows around 11.1°C (mean 14.4°C). It is about average for rainfall, averaging 97 mm of rainfall and 87% relative humidity across the period.
August is one of the warmer months of the year in Antrim. Across 45 years of records, the warmest August in Antrim was 1995 — when the month averaged 16.7°C — while the coldest was 1986 at 11.7°C. Typical August days reach 17.6°C with nights near 11.1°C. The long-term trend is warming, about 0.2°C per decade.
August is about average for rainfall in Antrim, averaging 97 mm of rainfall. The wettest August on record was 2008 with 193 mm, while the driest was 1995 at 20 mm.
Relative humidity in Antrim during August averages 87%. The most humid August was 2008 at 89%, and the least humid was 2022 at 83%.
August receives about 3.6 kWh/m²/day of solar energy in Antrim. The sunniest August was 1995 at 4.6 kWh/m²/day, and the cloudiest was 2008 at 3.
Average wind speed in Antrim during August is 3.4 m/s. The windiest August was 1985 at 4.7 m/s, while the calmest was 1983 at 2.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 13.9°C | 14.4°C | 14.6°C | 14.0°C | 15.2°C | +1.3°C |
| Avg High | 17.2°C | 17.7°C | 17.8°C | 17.2°C | 18.5°C | +1.3°C |
| Avg Low | 10.6°C | 11.1°C | 11.4°C | 10.8°C | 11.8°C | +1.2°C |
| Avg Rain | 99 mm | 80 mm | 107 mm | 99 mm | 102 mm | +3 mm |
August temperatures in Antrim have risen by about 0.8°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 5.3°C (1986) to a record high of 24.6°C (1995).
Rainfall in August is about average for rainfall, averaging 97 mm, with a wettest year of 193 mm.
One of the best times to visit Antrim
August is one of the best times to visit Antrim. Expect days averaging 17.6°C and nights around 11.1°C (mean 14.4°C) — warmer than Antrim's yearly average — with higher rainfall (97 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 | 19.2°C | 15.8°C | 12.4°C | 22.8°C | 8.8°C | 56 mm | 86% | 3.5 m/s | 3.8 |
| 2024 | 17.7°C | 14.4°C | 11.0°C | 20.9°C | 8.5°C | 114 mm | 86% | 4.2 m/s | 3.5 |
| 2023 | 18.1°C | 15.0°C | 11.9°C | 22.2°C | 9.1°C | 126 mm | 87% | 3.7 m/s | 3.8 |
| 2022 | 19.4°C | 15.7°C | 11.9°C | 24.0°C | 9.2°C | 42 mm | 83% | 2.7 m/s | 4.5 |
| 2021 | 18.5°C | 15.2°C | 11.8°C | 22.1°C | 9.2°C | 108 mm | 87% | 2.7 m/s | 3.5 |
| 2020 | 18.2°C | 15.0°C | 11.9°C | 21.4°C | 7.3°C | 164 mm | 88% | 3.3 m/s | 3.5 |
| 2019 | 18.3°C | 14.9°C | 11.5°C | 21.6°C | 7.6°C | 122 mm | 87% | 3.8 m/s | 3.9 |
| 2018 | 17.7°C | 14.4°C | 11.1°C | 21.4°C | 7.3°C | 92 mm | 87% | 3.3 m/s | 3.4 |
| 2017 | 17.0°C | 13.7°C | 10.4°C | 19.7°C | 7.3°C | 118 mm | 87% | 3.5 m/s | 3.6 |
| 2016 | 17.8°C | 14.7°C | 11.6°C | 20.1°C | 8.5°C | 79 mm | 87% | 3.7 m/s | 3.6 |
| 2015 | 16.9°C | 13.4°C | 9.9°C | 19.8°C | 6.3°C | 123 mm | 86% | 3.3 m/s | 3.6 |
| 2014 | 16.1°C | 13.0°C | 10.0°C | 19.4°C | 7.3°C | 136 mm | 86% | 4 m/s | 3.7 |
| 2013 | 17.8°C | 14.6°C | 11.3°C | 20.8°C | 9.0°C | 70 mm | 86% | 3.3 m/s | 3.5 |
| 2012 | 17.7°C | 14.8°C | 11.8°C | 20.8°C | 7.6°C | 121 mm | 88% | 3.6 m/s | 3.8 |
| 2011 | 16.4°C | 13.2°C | 10.0°C | 19.2°C | 7.2°C | 61 mm | 86% | 3 m/s | 3.5 |
| 2010 | 16.7°C | 13.4°C | 10.0°C | 20.5°C | 6.7°C | 65 mm | 85% | 3.5 m/s | 4.1 |
| 2009 | 17.6°C | 14.4°C | 11.1°C | 20.8°C | 8.8°C | 158 mm | 88% | 4.1 m/s | 3.4 |
| 2008 🌧️ | 17.3°C | 14.6°C | 12.0°C | 21.2°C | 9.5°C | 193 mm | 89% | 3.5 m/s | 3 |
| 2007 | 17.0°C | 13.9°C | 10.7°C | 20.5°C | 7.8°C | 120 mm | 88% | 3.6 m/s | 3.5 |
| 2006 | 17.4°C | 14.5°C | 11.6°C | 22.9°C | 8.1°C | 86 mm | 87% | 3.6 m/s | 3.4 |
| 2005 | 17.8°C | 14.3°C | 10.8°C | 20.9°C | 8.1°C | 82 mm | 87% | 3.4 m/s | 3.6 |
| 2004 | 18.1°C | 15.1°C | 12.2°C | 21.2°C | 8.3°C | 133 mm | 88% | 3.3 m/s | 3.4 |
| 2003 | 18.9°C | 15.3°C | 11.7°C | 24.3°C | 7.9°C | 27 mm | 86% | 2.8 m/s | 4 |
| 2002 | 18.2°C | 14.9°C | 11.5°C | 22.4°C | 8.8°C | 69 mm | 87% | 2.8 m/s | 3.4 |
| 2001 | 17.5°C | 14.2°C | 10.9°C | 22.3°C | 7.5°C | 108 mm | 88% | 2.8 m/s | 3.5 |
| 2000 | 18.3°C | 14.8°C | 11.2°C | 20.5°C | 8.4°C | 93 mm | 86% | 2.7 m/s | 4 |
| 1999 | 17.2°C | 14.1°C | 11.0°C | 20.6°C | 8.4°C | 107 mm | 87% | 3.4 m/s | 3.6 |
| 1998 | 17.7°C | 14.4°C | 11.0°C | 21.4°C | 7.3°C | 76 mm | 87% | 3.8 m/s | 3.7 |
| 1997 | 19.3°C | 15.9°C | 12.4°C | 22.6°C | 8.0°C | 65 mm | 86% | 3.3 m/s | 3.9 |
| 1996 | 17.0°C | 13.8°C | 10.7°C | 21.1°C | 7.7°C | 100 mm | 89% | 3.2 m/s | 3.4 |
| 1995 🔥 | 20.5°C | 16.7°C | 12.9°C | 24.6°C | 9.6°C | 20 mm | 84% | 2.8 m/s | 4.6 |
| 1994 | 16.8°C | 13.5°C | 10.2°C | 20.9°C | 7.6°C | 82 mm | 85% | 3.3 m/s | 3.9 |
| 1993 | 16.1°C | 12.7°C | 9.2°C | 20.2°C | 5.7°C | 63 mm | 86% | 3.2 m/s | 3.7 |
| 1992 | 16.1°C | 12.9°C | 9.7°C | 19.2°C | 6.9°C | 136 mm | 85% | 4.1 m/s | 3.8 |
| 1991 | 18.5°C | 15.0°C | 11.5°C | 23.1°C | 7.7°C | 64 mm | 86% | 3.2 m/s | 3.7 |
| 1990 | 18.3°C | 15.2°C | 12.0°C | 23.3°C | 8.0°C | 83 mm | 86% | 3.5 m/s | 3.4 |
| 1989 | 17.6°C | 14.1°C | 10.6°C | 20.9°C | 6.9°C | 99 mm | 86% | 4.1 m/s | 3.3 |
| 1988 | 16.3°C | 13.2°C | 10.0°C | 19.7°C | 6.6°C | 111 mm | 87% | 4.2 m/s | 3.5 |
| 1987 | 17.3°C | 14.0°C | 10.8°C | 22.5°C | 6.7°C | 122 mm | 87% | 3.3 m/s | 3.3 |
| 1986 ❄️ | 14.7°C | 11.7°C | 8.6°C | 17.6°C | 5.3°C | 131 mm | 85% | 3.9 m/s | 3.2 |
| 1985 | 15.2°C | 12.5°C | 9.8°C | 18.8°C | 6.8°C | 178 mm | 88% | 4.7 m/s | 3.4 |
| 1984 | 19.2°C | 15.6°C | 12.1°C | 22.6°C | 7.4°C | 81 mm | 85% | 2.8 m/s | 3.7 |
| 1983 | 19.5°C | 15.5°C | 11.6°C | 22.1°C | 7.9°C | 44 mm | 84% | 2.5 m/s | — |
| 1982 | 16.8°C | 13.6°C | 10.5°C | 22.5°C | 6.5°C | 83 mm | 85% | 4 m/s | — |
| 1981 | 18.2°C | 14.7°C | 11.2°C | 21.1°C | 8.0°C | 41 mm | 87% | 2.9 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 17.6°C with lows near 11.1°C (mean 14.4°C), based on 45 years of NASA POWER data.
August averages 97 mm of rainfall in Antrim, about average for rainfall. The wettest on record was 193 mm in 2008.
The hottest August reached 24.6°C in 1995. The coldest dipped to 5.3°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.8°C. Daytime highs moved from 17.8°C to 18.6°C and overnight lows from 11°C to 11.8°C over the same span.
August is one of the warmer months of the year in Antrim and about average for rainfall, so plan for around 17.6°C daytime highs and 11.1°C at night.
Not quite — August is the 11th coolest month in Antrim, averaging 14.4°C.
For August in Antrim, pack light layers you can adjust through the day, with typical highs of 17.6°C and lows of 11.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 87% — quite humid.
Average wind speed in August is 3.4 m/s. The windiest August on record averaged 4.7 m/s (1985).
The wettest August on record was 2008 with 193 mm. On average, August sees 97 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 Antrim 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.
