August is one of the warmer months of the year in Coleraine, with average highs near 16.9°C and lows around 11.3°C (mean 14.1°C). It is about average for rainfall, averaging 107 mm of rainfall and 87% relative humidity across the period.
August is one of the warmer months of the year in Coleraine. Across 45 years of records, the warmest August in Coleraine was 1995 — when the month averaged 16.5°C — while the coldest was 1986 at 11.5°C. Typical August days reach 16.9°C with nights near 11.3°C. The long-term trend is warming, about 0.2°C per decade.
August is about average for rainfall in Coleraine, averaging 107 mm of rainfall. The wettest August on record was 1985 with 202 mm, while the driest was 1995 at 23 mm.
Relative humidity in Coleraine during August averages 87%. The most humid August was 2008 at 89%, and the least humid was 2022 at 84%.
August receives about 3.8 kWh/m²/day of solar energy in Coleraine. The sunniest August was 1995 at 4.4 kWh/m²/day, and the cloudiest were 1989 and 2008 at 3.3.
Average wind speed in Coleraine during August is 3.9 m/s. The windiest Augusts were 1985 and 2024 at 5 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 | 13.6°C | 14.1°C | 14.3°C | 13.8°C | 14.9°C | +1.3°C |
| Avg High | 16.5°C | 17.0°C | 17.0°C | 16.4°C | 17.7°C | +1.2°C |
| Avg Low | 10.8°C | 11.3°C | 11.6°C | 11.1°C | 12.0°C | +1.2°C |
| Avg Rain | 113 mm | 91 mm | 116 mm | 113 mm | 100 mm | -13 mm |
August temperatures in Coleraine have risen by about 0.9°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 6.6°C (1982) to a record high of 23.9°C (1995).
Rainfall in August is about average for rainfall, averaging 107 mm, with a wettest year of 202 mm.
One of the best times to visit Coleraine
August is one of the best times to visit Coleraine. Expect days averaging 16.9°C and nights around 11.3°C (mean 14.1°C) — warmer than Coleraine's yearly average — with higher rainfall (107 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 | 18.7°C | 15.8°C | 12.8°C | 23.7°C | 10.0°C | 71 mm | 86% | 4 m/s | 3.9 |
| 2024 | 16.9°C | 14.0°C | 11.2°C | 20.0°C | 9.1°C | 128 mm | 86% | 5 m/s | 3.5 |
| 2023 | 17.3°C | 14.8°C | 12.3°C | 21.4°C | 9.9°C | 104 mm | 87% | 4.4 m/s | 3.8 |
| 2022 | 18.3°C | 15.3°C | 12.2°C | 23.4°C | 9.7°C | 45 mm | 84% | 3.3 m/s | 4.1 |
| 2021 | 17.7°C | 14.9°C | 12.1°C | 21.0°C | 10.7°C | 101 mm | 88% | 3 m/s | 3.6 |
| 2020 | 17.3°C | 14.5°C | 11.7°C | 21.7°C | 8.2°C | 152 mm | 88% | 3.5 m/s | 3.9 |
| 2019 | 17.5°C | 14.6°C | 11.8°C | 21.4°C | 8.3°C | 158 mm | 87% | 4.4 m/s | 3.8 |
| 2018 | 16.5°C | 13.8°C | 11.1°C | 20.0°C | 8.0°C | 118 mm | 87% | 3.9 m/s | 3.6 |
| 2017 | 16.3°C | 13.6°C | 10.8°C | 18.5°C | 8.2°C | 127 mm | 87% | 4.1 m/s | 4 |
| 2016 | 17.3°C | 14.5°C | 11.8°C | 20.1°C | 8.9°C | 98 mm | 87% | 4.3 m/s | 3.6 |
| 2015 | 16.1°C | 13.2°C | 10.2°C | 19.2°C | 7.4°C | 134 mm | 87% | 3.8 m/s | 3.9 |
| 2014 | 15.4°C | 13.0°C | 10.6°C | 18.5°C | 7.9°C | 132 mm | 86% | 4.6 m/s | 4 |
| 2013 | 16.9°C | 14.3°C | 11.6°C | 20.5°C | 9.2°C | 78 mm | 86% | 3.9 m/s | 3.6 |
| 2012 | 17.1°C | 14.4°C | 11.8°C | 20.2°C | 8.8°C | 118 mm | 88% | 3.9 m/s | 4.2 |
| 2011 | 15.5°C | 12.9°C | 10.3°C | 18.5°C | 7.6°C | 89 mm | 85% | 3.4 m/s | 3.8 |
| 2010 | 15.8°C | 13.2°C | 10.6°C | 19.5°C | 7.6°C | 82 mm | 85% | 4 m/s | 4.2 |
| 2009 | 16.9°C | 14.2°C | 11.5°C | 19.7°C | 9.0°C | 191 mm | 87% | 4.5 m/s | 3.4 |
| 2008 | 16.8°C | 14.5°C | 12.2°C | 20.3°C | 10.4°C | 186 mm | 89% | 3.9 m/s | 3.3 |
| 2007 | 16.1°C | 13.5°C | 11.0°C | 19.5°C | 9.2°C | 115 mm | 88% | 4.1 m/s | 3.7 |
| 2006 | 16.4°C | 14.1°C | 11.9°C | 22.3°C | 8.8°C | 89 mm | 88% | 4.1 m/s | 3.5 |
| 2005 | 16.9°C | 14.1°C | 11.2°C | 20.6°C | 8.8°C | 127 mm | 87% | 4 m/s | 3.7 |
| 2004 | 17.4°C | 14.9°C | 12.4°C | 20.8°C | 9.9°C | 130 mm | 88% | 3.8 m/s | 3.6 |
| 2003 | 18.1°C | 15.1°C | 12.0°C | 23.6°C | 8.9°C | 36 mm | 86% | 3.2 m/s | 4.1 |
| 2002 | 17.5°C | 14.5°C | 11.6°C | 21.6°C | 8.9°C | 72 mm | 87% | 3.2 m/s | 3.6 |
| 2001 | 16.6°C | 13.7°C | 10.9°C | 20.3°C | 8.4°C | 109 mm | 87% | 3.3 m/s | 3.9 |
| 2000 | 17.3°C | 14.3°C | 11.4°C | 19.9°C | 9.1°C | 102 mm | 87% | 3.2 m/s | 4.1 |
| 1999 | 16.7°C | 14.0°C | 11.3°C | 20.8°C | 8.0°C | 102 mm | 87% | 3.9 m/s | 3.8 |
| 1998 | 16.7°C | 14.0°C | 11.3°C | 20.8°C | 8.1°C | 97 mm | 88% | 4.5 m/s | 3.7 |
| 1997 | 18.7°C | 15.6°C | 12.6°C | 21.7°C | 9.2°C | 70 mm | 86% | 3.7 m/s | 4.3 |
| 1996 | 16.3°C | 13.6°C | 10.9°C | 20.8°C | 7.9°C | 130 mm | 89% | 3.6 m/s | 3.4 |
| 1995 🔥 | 19.9°C | 16.5°C | 13.0°C | 23.9°C | 9.7°C | 23 mm | 85% | 3.3 m/s | 4.4 |
| 1994 | 15.9°C | 13.3°C | 10.6°C | 20.4°C | 8.7°C | 90 mm | 86% | 3.7 m/s | 4 |
| 1993 | 15.2°C | 12.4°C | 9.7°C | 20.6°C | 7.1°C | 72 mm | 86% | 3.7 m/s | 3.8 |
| 1992 | 15.3°C | 12.6°C | 9.9°C | 18.3°C | 7.5°C | 160 mm | 85% | 4.7 m/s | 3.9 |
| 1991 | 17.6°C | 14.7°C | 11.8°C | 21.7°C | 8.9°C | 70 mm | 86% | 3.7 m/s | 3.6 |
| 1990 | 17.3°C | 14.6°C | 12.0°C | 22.1°C | 9.5°C | 97 mm | 87% | 4 m/s | 3.4 |
| 1989 | 16.7°C | 13.9°C | 11.0°C | 20.7°C | 8.1°C | 126 mm | 86% | 4.8 m/s | 3.3 |
| 1988 | 15.7°C | 13.0°C | 10.3°C | 20.2°C | 7.6°C | 140 mm | 87% | 4.6 m/s | 3.6 |
| 1987 | 16.5°C | 13.8°C | 11.0°C | 21.1°C | 7.6°C | 125 mm | 87% | 3.7 m/s | 3.6 |
| 1986 ❄️ | 14.0°C | 11.5°C | 9.0°C | 17.4°C | 6.6°C | 129 mm | 85% | 4.1 m/s | 3.8 |
| 1985 🌧️ | 14.6°C | 12.3°C | 10.0°C | 18.3°C | 7.5°C | 202 mm | 88% | 5 m/s | 3.4 |
| 1984 | 18.5°C | 15.2°C | 12.0°C | 22.6°C | 8.4°C | 82 mm | 85% | 3.2 m/s | 3.9 |
| 1983 | 18.8°C | 15.3°C | 11.8°C | 22.0°C | 8.4°C | 49 mm | 85% | 2.9 m/s | — |
| 1982 | 16.0°C | 13.4°C | 10.8°C | 21.4°C | 6.6°C | 108 mm | 84% | 4.7 m/s | — |
| 1981 | 17.3°C | 14.2°C | 11.1°C | 21.2°C | 7.8°C | 56 mm | 87% | 3.4 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 16.9°C with lows near 11.3°C (mean 14.1°C), based on 45 years of NASA POWER data.
August averages 107 mm of rainfall in Coleraine, about average for rainfall. The wettest on record was 202 mm in 1985.
The hottest August reached 23.9°C in 1995. The coldest dipped to 6.6°C in 1982.
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 17°C to 17.8°C and overnight lows from 11.1°C to 12.1°C over the same span.
August is one of the warmer months of the year in Coleraine and about average for rainfall, so plan for around 16.9°C daytime highs and 11.3°C at night.
Not quite — August is the 11th coolest month in Coleraine, averaging 14.1°C.
For August in Coleraine, pack light layers you can adjust through the day, with typical highs of 16.9°C and lows of 11.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 87% — quite humid.
Average wind speed in August is 3.9 m/s. The windiest August on record averaged 5 m/s (1985).
The wettest August on record was 1985 with 202 mm. On average, August sees 107 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 Coleraine 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.
