August is one of the warmer months of the year in Carrickfergus, with average highs near 16.8°C and lows around 12.2°C (mean 14.5°C). It is about average for rainfall, averaging 89 mm of rainfall and 87% relative humidity across the period.
August is one of the warmer months of the year in Carrickfergus. Across 45 years of records, the warmest August in Carrickfergus was 1995 — when the month averaged 16.5°C — while the coldest was 1986 at 12°C. Typical August days reach 16.8°C with nights near 12.2°C. The long-term trend is warming, about 0.2°C per decade.
August is about average for rainfall in Carrickfergus, averaging 89 mm of rainfall. The wettest August on record was 2008 with 178 mm, while the driest was 1995 at 18 mm.
Relative humidity in Carrickfergus during August averages 87%. The most humid August was 2008 at 90%, and the least humid was 2022 at 84%.
August receives about 4 kWh/m²/day of solar energy in Carrickfergus. The sunniest Augusts were 1995 and 2003 at 4.6 kWh/m²/day, and the cloudiest was 2008 at 3.2.
Average wind speed in Carrickfergus during August is 4 m/s. The windiest August was 1985 at 5.6 m/s, while the calmest was 1983 at 2.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 13.9°C | 14.5°C | 14.7°C | 14.3°C | 15.3°C | +1.4°C |
| Avg High | 16.2°C | 16.8°C | 16.9°C | 16.5°C | 17.6°C | +1.4°C |
| Avg Low | 11.7°C | 12.2°C | 12.5°C | 12.0°C | 12.9°C | +1.2°C |
| Avg Rain | 91 mm | 72 mm | 98 mm | 92 mm | 97 mm | +6 mm |
August temperatures in Carrickfergus have risen by about 0.9°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 7.4°C (1986) to a record high of 22.9°C (2022).
Rainfall in August is about average for rainfall, averaging 89 mm, with a wettest year of 178 mm.
One of the best times to visit Carrickfergus
August is one of the best times to visit Carrickfergus. Expect days averaging 16.8°C and nights around 12.2°C (mean 14.5°C) — warmer than Carrickfergus's yearly average — with higher rainfall (89 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 | 18.1°C | 15.8°C | 13.4°C | 21.1°C | 10.8°C | 49 mm | 86% | 4.1 m/s | 4.3 |
| 2024 | 17.1°C | 14.6°C | 12.2°C | 19.3°C | 10.0°C | 118 mm | 87% | 4.9 m/s | 3.8 |
| 2023 | 17.4°C | 15.2°C | 13.0°C | 20.3°C | 10.6°C | 116 mm | 87% | 4.4 m/s | 4.2 |
| 2022 | 18.5°C | 15.8°C | 13.1°C | 22.9°C | 10.6°C | 41 mm | 84% | 3 m/s | 4.5 |
| 2021 | 17.4°C | 15.1°C | 12.9°C | 20.3°C | 10.5°C | 92 mm | 88% | 3.2 m/s | 3.6 |
| 2020 | 17.2°C | 15.1°C | 13.0°C | 19.9°C | 10.0°C | 164 mm | 88% | 3.8 m/s | 3.8 |
| 2019 | 17.3°C | 15.0°C | 12.7°C | 19.1°C | 9.6°C | 109 mm | 88% | 4.5 m/s | 4.1 |
| 2018 | 16.9°C | 14.6°C | 12.2°C | 19.6°C | 9.1°C | 85 mm | 87% | 3.7 m/s | 3.7 |
| 2017 | 16.4°C | 14.1°C | 11.7°C | 18.5°C | 9.7°C | 110 mm | 87% | 4.2 m/s | 3.9 |
| 2016 | 17.0°C | 14.8°C | 12.5°C | 18.2°C | 10.5°C | 71 mm | 87% | 4.2 m/s | 4 |
| 2015 | 16.1°C | 13.7°C | 11.3°C | 18.4°C | 8.8°C | 108 mm | 86% | 3.9 m/s | 4.2 |
| 2014 | 15.6°C | 13.5°C | 11.3°C | 18.5°C | 9.3°C | 124 mm | 86% | 4.9 m/s | 4.1 |
| 2013 | 17.0°C | 14.7°C | 12.3°C | 18.7°C | 10.6°C | 71 mm | 87% | 3.8 m/s | 4 |
| 2012 | 16.7°C | 14.7°C | 12.8°C | 18.9°C | 9.6°C | 123 mm | 89% | 4.1 m/s | 4 |
| 2011 | 15.8°C | 13.6°C | 11.4°C | 18.0°C | 9.1°C | 61 mm | 86% | 3.6 m/s | 3.9 |
| 2010 | 16.1°C | 13.8°C | 11.4°C | 19.0°C | 9.3°C | 62 mm | 85% | 4.1 m/s | 4.5 |
| 2009 | 16.8°C | 14.6°C | 12.3°C | 18.9°C | 10.4°C | 153 mm | 88% | 4.9 m/s | 3.7 |
| 2008 🌧️ | 16.5°C | 14.6°C | 12.7°C | 19.4°C | 10.8°C | 178 mm | 90% | 3.9 m/s | 3.2 |
| 2007 | 16.4°C | 14.2°C | 11.9°C | 19.1°C | 9.4°C | 114 mm | 88% | 4.3 m/s | 3.9 |
| 2006 | 16.6°C | 14.6°C | 12.5°C | 20.8°C | 10.4°C | 82 mm | 87% | 4.3 m/s | 4.1 |
| 2005 | 16.8°C | 14.4°C | 12.0°C | 19.5°C | 9.5°C | 60 mm | 87% | 3.9 m/s | 4.1 |
| 2004 | 17.0°C | 15.0°C | 13.1°C | 18.7°C | 9.8°C | 128 mm | 89% | 3.9 m/s | 3.9 |
| 2003 | 17.9°C | 15.4°C | 12.9°C | 22.6°C | 10.1°C | 23 mm | 86% | 3.3 m/s | 4.6 |
| 2002 | 17.1°C | 14.9°C | 12.7°C | 21.2°C | 10.7°C | 68 mm | 88% | 3.1 m/s | 4.1 |
| 2001 | 16.7°C | 14.4°C | 12.1°C | 20.4°C | 9.8°C | 91 mm | 88% | 3.3 m/s | 3.9 |
| 2000 | 17.4°C | 15.0°C | 12.5°C | 19.0°C | 10.5°C | 80 mm | 87% | 3.1 m/s | 4.4 |
| 1999 | 16.5°C | 14.3°C | 12.2°C | 18.4°C | 9.8°C | 88 mm | 86% | 3.9 m/s | 3.9 |
| 1998 | 16.8°C | 14.4°C | 12.0°C | 19.3°C | 9.6°C | 69 mm | 87% | 4.4 m/s | 3.9 |
| 1997 | 18.1°C | 15.7°C | 13.4°C | 21.1°C | 9.6°C | 53 mm | 87% | 3.6 m/s | 4.2 |
| 1996 | 16.0°C | 14.0°C | 11.9°C | 18.7°C | 10.1°C | 82 mm | 89% | 3.7 m/s | 4 |
| 1995 🔥 | 19.1°C | 16.5°C | 14.0°C | 22.7°C | 11.4°C | 18 mm | 85% | 3.2 m/s | 4.6 |
| 1994 | 15.9°C | 13.6°C | 11.3°C | 18.8°C | 9.2°C | 81 mm | 86% | 3.8 m/s | 4.3 |
| 1993 | 15.5°C | 13.1°C | 10.6°C | 18.6°C | 7.7°C | 59 mm | 85% | 3.8 m/s | 4.3 |
| 1992 | 15.7°C | 13.4°C | 11.1°C | 17.9°C | 8.3°C | 128 mm | 85% | 4.9 m/s | 4 |
| 1991 | 17.3°C | 14.9°C | 12.5°C | 21.5°C | 9.6°C | 60 mm | 87% | 3.5 m/s | 3.9 |
| 1990 | 17.3°C | 15.1°C | 12.8°C | 20.5°C | 10.0°C | 80 mm | 87% | 3.9 m/s | 3.7 |
| 1989 | 16.7°C | 14.2°C | 11.8°C | 19.3°C | 9.4°C | 90 mm | 86% | 4.7 m/s | 3.5 |
| 1988 | 15.6°C | 13.4°C | 11.2°C | 18.0°C | 8.5°C | 105 mm | 87% | 5 m/s | 3.8 |
| 1987 | 16.1°C | 13.9°C | 11.7°C | 20.5°C | 8.9°C | 109 mm | 87% | 3.9 m/s | 3.4 |
| 1986 ❄️ | 14.1°C | 12.0°C | 10.0°C | 15.8°C | 7.4°C | 122 mm | 84% | 4.7 m/s | 3.6 |
| 1985 | 14.7°C | 12.8°C | 10.8°C | 16.8°C | 8.3°C | 168 mm | 88% | 5.6 m/s | 3.3 |
| 1984 | 17.8°C | 15.4°C | 13.0°C | 20.8°C | 9.1°C | 72 mm | 85% | 3.1 m/s | 4.1 |
| 1983 | 17.9°C | 15.3°C | 12.7°C | 20.4°C | 9.2°C | 38 mm | 85% | 2.8 m/s | — |
| 1982 | 16.0°C | 13.8°C | 11.6°C | 20.9°C | 8.4°C | 80 mm | 85% | 4.6 m/s | — |
| 1981 | 17.1°C | 14.7°C | 12.3°C | 19.2°C | 10.0°C | 38 mm | 86% | 3.3 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 12.2°C (mean 14.5°C), based on 45 years of NASA POWER data.
August averages 89 mm of rainfall in Carrickfergus, about average for rainfall. The wettest on record was 178 mm in 2008.
The hottest August reached 22.9°C in 2022. The coldest dipped to 7.4°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.9°C. Daytime highs moved from 16.7°C to 17.7°C and overnight lows from 12.1°C to 12.9°C over the same span.
August is one of the warmer months of the year in Carrickfergus and about average for rainfall, so plan for around 16.8°C daytime highs and 12.2°C at night.
Not quite — August is the 12th coolest month in Carrickfergus, averaging 14.5°C.
For August in Carrickfergus, pack light layers you can adjust through the day, with typical highs of 16.8°C and lows of 12.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 87% — quite humid.
Average wind speed in August is 4 m/s. The windiest August on record averaged 5.6 m/s (1985).
The wettest August on record was 2008 with 178 mm. On average, August sees 89 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 Carrickfergus 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.
