March is one of the cooler months of the year in Coleraine, with average highs near 8.1°C and lows around 3.5°C (mean 5.8°C). It is about average for rainfall, averaging 90 mm of rainfall and 89% relative humidity across the period.
March is one of the cooler months of the year in Coleraine. Across 45 years of records, the warmest March in Coleraine was 2012 — when the month averaged 7.8°C — while the coldest was 2013 at 2.7°C. Typical March days reach 8.1°C with nights near 3.5°C. The long-term March temperature trend is broadly flat.
March is about average for rainfall in Coleraine, averaging 90 mm of rainfall. The wettest March on record was 2006 with 141 mm, while the driest was 2025 at 36 mm.
Relative humidity in Coleraine during March averages 89%. The most humid March was 1991 at 92%, and the least humid was 1984 at 86%.
March receives about 2.2 kWh/m²/day of solar energy in Coleraine. The sunniest March was 2022 at 2.8 kWh/m²/day, and the cloudiest were 1990 and 1995 at 1.8.
Average wind speed in Coleraine during March is 5 m/s. The windiest March was 1994 at 7.1 m/s, while the calmest were 1984 and 2011 at 3.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 5.2°C | 6.1°C | 6.0°C | 5.5°C | 6.4°C | +1.2°C |
| Avg High | 7.4°C | 8.3°C | 8.3°C | 7.9°C | 9.0°C | +1.6°C |
| Avg Low | 3.0°C | 3.9°C | 3.6°C | 3.1°C | 3.8°C | +0.8°C |
| Avg Rain | 106 mm | 93 mm | 84 mm | 84 mm | 80 mm | -26 mm |
March temperatures in Coleraine have risen by about 1.3°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -3.2°C (1986) to a record high of 16.3°C (2012).
Rainfall in March is about average for rainfall, averaging 90 mm, with a wettest year of 141 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows rose 0°C per decade, widening the gap between day and night.
A quieter season to visit Coleraine
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Coleraine. That said, March — with days averaging 8.1°C and nights around 3.5°C (mean 5.8°C) and higher rainfall (90 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 10.0°C | 7.1°C | 4.2°C | 14.6°C | 0.7°C | 36 mm | 89% | 4.3 m/s | 2.4 |
| 2024 | 8.8°C | 6.5°C | 4.3°C | 11.8°C | 0.9°C | 122 mm | 90% | 5.1 m/s | 2.4 |
| 2023 | 8.4°C | 6.1°C | 3.7°C | 13.1°C | -1.2°C | 120 mm | 89% | 4.1 m/s | 2.3 |
| 2022 | 9.8°C | 6.7°C | 3.6°C | 15.3°C | 0.1°C | 53 mm | 87% | 4.2 m/s | 2.8 |
| 2021 | 9.1°C | 6.8°C | 4.5°C | 13.8°C | -0.1°C | 81 mm | 91% | 4.9 m/s | 2.1 |
| 2020 | 7.6°C | 5.2°C | 2.7°C | 11.9°C | 0.0°C | 68 mm | 89% | 5.2 m/s | 2.4 |
| 2019 | 8.6°C | 6.3°C | 4.1°C | 13.1°C | 1.7°C | 136 mm | 89% | 5.5 m/s | 2.2 |
| 2018 | 6.1°C | 3.9°C | 1.7°C | 9.0°C | -2.3°C | 82 mm | 89% | 4.9 m/s | 2.2 |
| 2017 | 9.4°C | 6.7°C | 4.0°C | 13.1°C | 0.3°C | 105 mm | 88% | 4.3 m/s | 2.6 |
| 2016 | 7.9°C | 5.5°C | 3.2°C | 11.1°C | 0.6°C | 81 mm | 90% | 4.1 m/s | 2.3 |
| 2015 | 7.9°C | 5.3°C | 2.8°C | 12.1°C | 0.0°C | 91 mm | 87% | 5.7 m/s | 2.4 |
| 2014 | 8.3°C | 5.9°C | 3.5°C | 12.1°C | -0.1°C | 79 mm | 91% | 5.2 m/s | 2.1 |
| 2013 ❄️ | 4.6°C | 2.7°C | 0.9°C | 8.3°C | -1.9°C | 71 mm | 87% | 5.1 m/s | 1.9 |
| 2012 🔥 | 10.5°C | 7.8°C | 5.1°C | 16.3°C | 2.1°C | 38 mm | 89% | 4.2 m/s | 2.3 |
| 2011 | 8.5°C | 6.0°C | 3.5°C | 13.2°C | 0.0°C | 60 mm | 89% | 3.7 m/s | 2.2 |
| 2010 | 7.4°C | 5.0°C | 2.5°C | 11.0°C | -1.1°C | 102 mm | 87% | 4.1 m/s | 2.3 |
| 2009 | 8.6°C | 6.2°C | 3.8°C | 12.9°C | 0.2°C | 82 mm | 89% | 5.5 m/s | 2.3 |
| 2008 | 7.4°C | 5.3°C | 3.2°C | 10.5°C | 1.1°C | 136 mm | 87% | 6 m/s | 2.3 |
| 2007 | 8.6°C | 6.0°C | 3.4°C | 11.7°C | 0.9°C | 87 mm | 89% | 5.4 m/s | 2.5 |
| 2006 🌧️ | 7.1°C | 4.9°C | 2.7°C | 12.4°C | -1.3°C | 141 mm | 88% | 4.5 m/s | 2.2 |
| 2005 | 9.3°C | 7.3°C | 5.3°C | 14.1°C | 0.4°C | 75 mm | 90% | 4.7 m/s | 2.2 |
| 2004 | 8.4°C | 5.9°C | 3.5°C | 12.6°C | -0.8°C | 72 mm | 89% | 5.4 m/s | 2.4 |
| 2003 | 9.9°C | 6.8°C | 3.7°C | 13.4°C | 0.4°C | 45 mm | 90% | 4.4 m/s | 2.6 |
| 2002 | 9.0°C | 6.5°C | 4.0°C | 12.3°C | 0.4°C | 72 mm | 89% | 5.2 m/s | 2.5 |
| 2001 | 6.2°C | 4.2°C | 2.1°C | 10.7°C | -1.9°C | 64 mm | 88% | 4.8 m/s | 2.4 |
| 2000 | 8.8°C | 6.6°C | 4.5°C | 11.9°C | 0.2°C | 63 mm | 91% | 4.5 m/s | 2.1 |
| 1999 | 8.2°C | 5.9°C | 3.6°C | 12.5°C | 0.5°C | 74 mm | 89% | 5.1 m/s | 2.4 |
| 1998 | 9.1°C | 6.9°C | 4.8°C | 11.9°C | 1.0°C | 100 mm | 90% | 4.6 m/s | 1.9 |
| 1997 | 9.4°C | 7.0°C | 4.6°C | 12.4°C | -0.3°C | 71 mm | 90% | 5.3 m/s | 2.1 |
| 1996 | 6.4°C | 4.6°C | 2.7°C | 8.7°C | -0.4°C | 61 mm | 89% | 4.5 m/s | 1.9 |
| 1995 | 6.7°C | 4.4°C | 2.2°C | 11.5°C | -1.6°C | 123 mm | 88% | 5.9 m/s | 1.8 |
| 1994 | 7.9°C | 5.7°C | 3.5°C | 11.5°C | 0.9°C | 106 mm | 88% | 7.1 m/s | 2 |
| 1993 | 8.5°C | 6.1°C | 3.7°C | 13.1°C | -0.4°C | 74 mm | 89% | 5.3 m/s | 2.1 |
| 1992 | 8.6°C | 6.5°C | 4.4°C | 11.8°C | 1.5°C | 137 mm | 89% | 6.2 m/s | 1.9 |
| 1991 | 8.9°C | 6.6°C | 4.3°C | 12.5°C | 0.0°C | 102 mm | 92% | 4 m/s | 2 |
| 1990 | 9.4°C | 7.3°C | 5.3°C | 13.2°C | 1.1°C | 78 mm | 88% | 6.9 m/s | 1.8 |
| 1989 | 8.1°C | 5.7°C | 3.2°C | 11.2°C | -0.6°C | 119 mm | 89% | 5.8 m/s | 2 |
| 1988 | 7.9°C | 5.9°C | 3.9°C | 11.5°C | 0.0°C | 115 mm | 89% | 5.2 m/s | 2 |
| 1987 | 6.4°C | 4.3°C | 2.1°C | 11.2°C | -0.7°C | 107 mm | 88% | 5.3 m/s | 2 |
| 1986 | 6.9°C | 4.6°C | 2.2°C | 10.9°C | -3.2°C | 110 mm | 89% | 6.1 m/s | 2.1 |
| 1985 | 6.6°C | 4.5°C | 2.5°C | 11.4°C | -0.3°C | 89 mm | 88% | 4.9 m/s | 2 |
| 1984 | 6.4°C | 4.3°C | 2.2°C | 10.6°C | -0.4°C | 64 mm | 86% | 3.7 m/s | 2.3 |
| 1983 | 8.1°C | 6.1°C | 4.0°C | 12.0°C | 0.9°C | 111 mm | 90% | 5.5 m/s | — |
| 1982 | 7.7°C | 5.4°C | 3.2°C | 12.5°C | 0.7°C | 116 mm | 88% | 5.4 m/s | — |
| 1981 | 8.5°C | 6.3°C | 4.0°C | 12.7°C | 0.3°C | 125 mm | 89% | 5 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 8.1°C with lows near 3.5°C (mean 5.8°C), based on 45 years of NASA POWER data.
March averages 90 mm of rainfall in Coleraine, about average for rainfall. The wettest on record was 141 mm in 2006.
The hottest March reached 16.3°C in 2012. The coldest dipped to -3.2°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 1.3°C. Daytime highs moved from 7.5°C to 9.2°C and overnight lows from 3.2°C to 4.1°C over the same span.
March is one of the cooler months of the year in Coleraine and about average for rainfall, so plan for around 8.1°C daytime highs and 3.5°C at night.
Not quite — March is the 4th coolest month in Coleraine, averaging 5.8°C.
For March in Coleraine, pack warm layers and a jacket for chilly mornings, with typical highs of 8.1°C and lows of 3.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 89% — quite humid.
Average wind speed in March is 5 m/s. The windiest March on record averaged 7.1 m/s (1994).
The wettest March on record was 2006 with 141 mm. On average, March sees 90 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 March, 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 March specifically, along with year-by-year records and how the month has changed over the decades.
