July is one of the warmer months of the year in Coleraine, with average highs near 17°C and lows around 11.2°C (mean 14.1°C). It is about average for rainfall, averaging 98 mm of rainfall and 86% relative humidity across the period.
July is one of the warmer months of the year in Coleraine. Across 45 years of records, the warmest Julys in Coleraine were 2006 and 2013 — when the month averaged 16°C — while the coldest was 1993 at 12.6°C. Typical July days reach 17°C with nights near 11.2°C. The long-term July temperature trend is broadly flat.
July is about average for rainfall in Coleraine, averaging 98 mm of rainfall. The wettest July on record was 2023 with 167 mm, while the driest was 1983 at 32 mm.
Relative humidity in Coleraine during July averages 86%. The most humid July was 1998 at 88%, and the least humid was 1989 at 84%.
July receives about 4.5 kWh/m²/day of solar energy in Coleraine. The sunniest Julys were 2000, 2007 and 2009 at 5.1 kWh/m²/day, and the cloudiest were 1986 and 1987 at 4.
Average wind speed in Coleraine during July is 3.7 m/s. The windiest Julys were 1993 and 1998 at 4.6 m/s, while the calmest was 2021 at 2.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.0°C | 14.1°C | 14.0°C | 14.1°C | 14.5°C | +0.5°C |
| Avg High | 17.0°C | 17.0°C | 16.7°C | 17.0°C | 17.3°C | +0.3°C |
| Avg Low | 11.0°C | 11.2°C | 11.3°C | 11.2°C | 11.6°C | +0.6°C |
| Avg Rain | 84 mm | 96 mm | 96 mm | 114 mm | 99 mm | +15 mm |
July temperatures in Coleraine have risen by about 0.6°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 6.7°C (1984) to a record high of 25.6°C (2022).
Rainfall in July is about average for rainfall, averaging 98 mm, with a wettest year of 167 mm.
One of the best times to visit Coleraine
July is one of the best times to visit Coleraine. Expect days averaging 17°C and nights around 11.2°C (mean 14.1°C) — warmer than Coleraine's yearly average — with higher rainfall (98 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 | 18.4°C | 15.4°C | 12.4°C | 24.6°C | 8.9°C | 85 mm | 86% | 3.7 m/s | 4.4 |
| 2024 | 16.5°C | 13.6°C | 10.7°C | 20.0°C | 8.7°C | 83 mm | 86% | 3.5 m/s | 4.6 |
| 2023 🌧️ | 16.6°C | 14.2°C | 11.8°C | 20.9°C | 9.5°C | 167 mm | 86% | 4.3 m/s | 4.7 |
| 2022 | 18.0°C | 14.9°C | 11.8°C | 25.6°C | 10.0°C | 69 mm | 85% | 3.5 m/s | 4.3 |
| 2021 | 18.9°C | 15.7°C | 12.5°C | 25.0°C | 9.7°C | 51 mm | 86% | 2.4 m/s | 4.5 |
| 2020 | 15.6°C | 13.1°C | 10.6°C | 20.0°C | 8.7°C | 136 mm | 86% | 4.1 m/s | 4.3 |
| 2019 | 17.5°C | 14.9°C | 12.2°C | 22.6°C | 8.3°C | 132 mm | 87% | 3.7 m/s | 4.2 |
| 2018 | 18.2°C | 15.0°C | 11.8°C | 22.8°C | 8.8°C | 88 mm | 84% | 3.1 m/s | 4.6 |
| 2017 | 16.7°C | 13.6°C | 10.5°C | 21.1°C | 7.2°C | 131 mm | 85% | 3.8 m/s | 4.8 |
| 2016 | 16.4°C | 13.7°C | 11.0°C | 23.2°C | 8.5°C | 128 mm | 87% | 3.7 m/s | 4.2 |
| 2015 | 15.4°C | 12.7°C | 9.9°C | 21.6°C | 7.1°C | 151 mm | 86% | 3.9 m/s | 4.4 |
| 2014 | 18.0°C | 15.1°C | 12.1°C | 23.2°C | 8.7°C | 76 mm | 85% | 3.3 m/s | 4.8 |
| 2013 | 19.5°C | 16.0°C | 12.4°C | 24.2°C | 9.4°C | 66 mm | 85% | 2.7 m/s | 5 |
| 2012 | 15.3°C | 12.8°C | 10.3°C | 19.8°C | 7.1°C | 117 mm | 87% | 3.6 m/s | 4.5 |
| 2011 | 16.3°C | 13.4°C | 10.4°C | 19.9°C | 7.9°C | 81 mm | 84% | 3.3 m/s | 5 |
| 2010 | 16.7°C | 14.1°C | 11.6°C | 20.2°C | 9.0°C | 166 mm | 86% | 4.3 m/s | 4.4 |
| 2009 | 16.7°C | 14.1°C | 11.4°C | 20.8°C | 8.0°C | 138 mm | 86% | 4.1 m/s | 5.1 |
| 2008 | 17.0°C | 14.3°C | 11.6°C | 20.8°C | 7.9°C | 143 mm | 87% | 4.3 m/s | 4.2 |
| 2007 | 15.9°C | 13.4°C | 10.8°C | 18.5°C | 8.2°C | 114 mm | 86% | 3.5 m/s | 5.1 |
| 2006 🔥 | 19.3°C | 16.0°C | 12.6°C | 23.7°C | 9.2°C | 75 mm | 84% | 3.2 m/s | 4.8 |
| 2005 | 16.8°C | 14.1°C | 11.3°C | 24.6°C | 8.7°C | 56 mm | 87% | 3.3 m/s | 4.4 |
| 2004 | 15.9°C | 13.2°C | 10.4°C | 18.8°C | 8.4°C | 85 mm | 85% | 3.7 m/s | 4.8 |
| 2003 | 17.8°C | 15.0°C | 12.3°C | 22.8°C | 9.9°C | 97 mm | 87% | 3.8 m/s | 4.2 |
| 2002 | 15.2°C | 12.8°C | 10.4°C | 21.0°C | 7.9°C | 114 mm | 87% | 3.6 m/s | 4.3 |
| 2001 | 16.3°C | 13.5°C | 10.8°C | 21.6°C | 7.9°C | 78 mm | 87% | 3.6 m/s | 4.4 |
| 2000 | 16.5°C | 13.7°C | 10.9°C | 20.5°C | 8.2°C | 53 mm | 86% | 3.2 m/s | 5.1 |
| 1999 | 17.9°C | 14.8°C | 11.6°C | 24.0°C | 9.3°C | 98 mm | 86% | 3.6 m/s | 4.8 |
| 1998 | 15.5°C | 13.1°C | 10.8°C | 18.7°C | 8.8°C | 136 mm | 88% | 4.6 m/s | 4.4 |
| 1997 | 17.4°C | 14.4°C | 11.4°C | 21.3°C | 8.5°C | 105 mm | 87% | 3.6 m/s | 4.5 |
| 1996 | 16.3°C | 13.6°C | 10.8°C | 20.9°C | 8.1°C | 87 mm | 85% | 3.7 m/s | 4.5 |
| 1995 | 18.1°C | 15.1°C | 12.1°C | 22.8°C | 9.4°C | 112 mm | 86% | 3.8 m/s | 4.5 |
| 1994 | 17.3°C | 14.3°C | 11.2°C | 19.7°C | 8.9°C | 71 mm | 85% | 3.3 m/s | 4.4 |
| 1993 ❄️ | 15.0°C | 12.6°C | 10.2°C | 18.9°C | 6.8°C | 102 mm | 86% | 4.6 m/s | 4.4 |
| 1992 | 16.7°C | 13.7°C | 10.8°C | 20.2°C | 8.6°C | 89 mm | 84% | 3.9 m/s | 4.3 |
| 1991 | 18.0°C | 15.0°C | 12.0°C | 22.0°C | 9.6°C | 83 mm | 86% | 3.9 m/s | 4.6 |
| 1990 | 17.5°C | 14.4°C | 11.3°C | 22.1°C | 7.0°C | 72 mm | 84% | 4.3 m/s | 4.7 |
| 1989 | 18.7°C | 15.4°C | 12.0°C | 23.5°C | 9.1°C | 47 mm | 84% | 3.5 m/s | 4.9 |
| 1988 | 15.1°C | 12.7°C | 10.3°C | 18.3°C | 8.1°C | 132 mm | 85% | 4.5 m/s | 4.5 |
| 1987 | 16.6°C | 13.8°C | 11.0°C | 20.3°C | 7.2°C | 95 mm | 87% | 4 m/s | 4 |
| 1986 | 15.9°C | 13.2°C | 10.4°C | 21.9°C | 7.9°C | 97 mm | 86% | 4 m/s | 4 |
| 1985 | 16.2°C | 13.3°C | 10.5°C | 20.4°C | 7.3°C | 142 mm | 87% | 4 m/s | 4.1 |
| 1984 | 17.6°C | 14.4°C | 11.2°C | 20.9°C | 6.7°C | 71 mm | 84% | 3.3 m/s | 4.5 |
| 1983 | 19.4°C | 15.8°C | 12.3°C | 24.5°C | 8.9°C | 32 mm | 84% | 2.9 m/s | — |
| 1982 | 17.5°C | 14.2°C | 11.0°C | 20.8°C | 9.0°C | 37 mm | 84% | 3.1 m/s | — |
| 1981 | 15.6°C | 13.1°C | 10.6°C | 19.2°C | 8.5°C | 100 mm | 86% | 4.3 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 17°C with lows near 11.2°C (mean 14.1°C), based on 45 years of NASA POWER data.
July averages 98 mm of rainfall in Coleraine, about average for rainfall. The wettest on record was 167 mm in 2023.
The hottest July reached 25.6°C in 2022. The coldest dipped to 6.7°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 0.6°C. Daytime highs moved from 17.3°C to 17.7°C and overnight lows from 11.1°C to 11.8°C over the same span.
July is one of the warmer months of the year in Coleraine and about average for rainfall, so plan for around 17°C daytime highs and 11.2°C at night.
Not quite — July is the 12th coolest month in Coleraine, averaging 14.1°C.
For July in Coleraine, pack light layers you can adjust through the day, with typical highs of 17°C and lows of 11.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 86% — quite humid.
Average wind speed in July is 3.7 m/s. The windiest July on record averaged 4.6 m/s (1993).
The wettest July on record was 2023 with 167 mm. On average, July sees 98 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 July, 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 July specifically, along with year-by-year records and how the month has changed over the decades.
