March is one of the cooler months of the year in Newton Mearns, with average highs near 6.8°C and lows around 1.7°C (mean 4.3°C). It is about average for rainfall, averaging 107 mm of rainfall and 91% relative humidity across the period.
March is one of the cooler months of the year in Newton Mearns. Across 45 years of records, the warmest March in Newton Mearns was 2012 — when the month averaged 6.8°C — while the coldest was 2013 at 1.1°C. Typical March days reach 6.8°C with nights near 1.7°C. The long-term trend is warming, about 0.3°C per decade.
March is about average for rainfall in Newton Mearns, averaging 107 mm of rainfall. The wettest March on record was 1994 with 192 mm, while the driest was 2012 at 46 mm.
Relative humidity in Newton Mearns during March averages 91%. The most humid March was 1991 at 94%, and the least humid was 2022 at 89%.
March receives about 2.2 kWh/m²/day of solar energy in Newton Mearns. The sunniest March was 2022 at 2.8 kWh/m²/day, and the cloudiest were 1990 and 1994 at 1.7.
Average wind speed in Newton Mearns during March is 4.2 m/s. The windiest Marchs were 1990 and 1994 at 6.4 m/s, while the calmest were 2011 and 2023 at 3.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 3.4°C | 4.4°C | 4.3°C | 4.1°C | 5.0°C | +1.6°C |
| Avg High | 5.8°C | 6.8°C | 7.0°C | 6.7°C | 8.0°C | +2.2°C |
| Avg Low | 1.0°C | 2.0°C | 1.7°C | 1.6°C | 2.1°C | +1.1°C |
| Avg Rain | 127 mm | 126 mm | 96 mm | 91 mm | 94 mm | -32 mm |
March temperatures in Newton Mearns have risen by about 1.6°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -8.4°C (1986) to a record high of 15.9°C (2012).
Rainfall in March is about average for rainfall, averaging 107 mm, with a wettest year of 192 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.4°C per decade while lows rose 0.1°C per decade, widening the gap between day and night.
A quieter season to visit Newton Mearns
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Newton Mearns. That said, March — with days averaging 6.8°C and nights around 1.7°C (mean 4.3°C) and higher rainfall (107 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 | 9.3°C | 5.9°C | 2.6°C | 14.0°C | -2.1°C | 56 mm | 90% | 3.7 m/s | 2.5 |
| 2024 | 8.0°C | 5.3°C | 2.7°C | 11.9°C | -0.9°C | 114 mm | 91% | 4.3 m/s | 2.2 |
| 2023 | 6.7°C | 3.9°C | 1.2°C | 11.1°C | -3.5°C | 125 mm | 91% | 3.1 m/s | 2.3 |
| 2022 | 9.1°C | 5.5°C | 1.9°C | 15.0°C | -1.6°C | 59 mm | 89% | 3.2 m/s | 2.8 |
| 2021 | 8.0°C | 5.5°C | 3.0°C | 12.5°C | -2.5°C | 113 mm | 92% | 4.1 m/s | 2.2 |
| 2020 | 6.8°C | 4.0°C | 1.2°C | 10.2°C | -2.3°C | 99 mm | 91% | 4.3 m/s | 2.3 |
| 2019 | 7.3°C | 5.0°C | 2.7°C | 10.4°C | -1.3°C | 136 mm | 91% | 4.8 m/s | 2.2 |
| 2018 | 4.5°C | 2.2°C | -0.1°C | 7.8°C | -4.4°C | 91 mm | 91% | 4.4 m/s | 2.1 |
| 2017 | 8.1°C | 5.3°C | 2.6°C | 13.1°C | -1.6°C | 88 mm | 90% | 3.8 m/s | 2.4 |
| 2016 | 7.0°C | 4.3°C | 1.7°C | 10.5°C | -2.2°C | 81 mm | 91% | 3.2 m/s | 2.5 |
| 2015 | 6.8°C | 4.0°C | 1.2°C | 10.1°C | -2.0°C | 130 mm | 91% | 4.8 m/s | 2.3 |
| 2014 | 7.4°C | 4.9°C | 2.5°C | 9.5°C | -2.1°C | 107 mm | 92% | 4.8 m/s | 2.2 |
| 2013 ❄️ | 3.3°C | 1.1°C | -1.1°C | 7.5°C | -3.5°C | 47 mm | 89% | 4.3 m/s | 2.1 |
| 2012 🔥 | 9.8°C | 6.8°C | 3.9°C | 15.9°C | -0.5°C | 46 mm | 90% | 3.5 m/s | 2.4 |
| 2011 | 7.2°C | 4.5°C | 1.8°C | 12.1°C | -1.4°C | 87 mm | 92% | 3.1 m/s | 2.2 |
| 2010 | 5.9°C | 3.2°C | 0.5°C | 9.2°C | -7.9°C | 97 mm | 92% | 3.6 m/s | 2.3 |
| 2009 | 7.3°C | 4.8°C | 2.4°C | 11.3°C | -1.9°C | 105 mm | 91% | 4.7 m/s | 2.4 |
| 2008 | 6.0°C | 3.4°C | 0.9°C | 9.4°C | -2.5°C | 128 mm | 90% | 4.8 m/s | 2.4 |
| 2007 | 7.7°C | 4.9°C | 2.1°C | 11.2°C | -2.6°C | 102 mm | 91% | 4.9 m/s | 2.4 |
| 2006 | 4.7°C | 2.3°C | -0.1°C | 11.2°C | -4.1°C | 155 mm | 91% | 3.7 m/s | 2.1 |
| 2005 | 7.9°C | 5.4°C | 3.0°C | 13.0°C | -2.1°C | 77 mm | 92% | 3.9 m/s | 2.1 |
| 2004 | 7.5°C | 4.6°C | 1.8°C | 11.5°C | -2.7°C | 76 mm | 92% | 4 m/s | 2.3 |
| 2003 | 8.8°C | 5.6°C | 2.4°C | 12.9°C | -1.0°C | 68 mm | 91% | 3.3 m/s | 2.7 |
| 2002 | 7.7°C | 4.9°C | 2.1°C | 11.4°C | -1.7°C | 84 mm | 91% | 4.4 m/s | 2.5 |
| 2001 | 5.0°C | 2.3°C | -0.4°C | 9.8°C | -6.0°C | 81 mm | 91% | 3.7 m/s | 2.5 |
| 2000 | 7.7°C | 5.0°C | 2.4°C | 10.8°C | -2.1°C | 83 mm | 92% | 4.2 m/s | 2.1 |
| 1999 | 7.1°C | 4.5°C | 2.0°C | 11.4°C | -2.4°C | 106 mm | 92% | 4.1 m/s | 2.3 |
| 1998 | 7.5°C | 5.1°C | 2.7°C | 11.2°C | -2.3°C | 108 mm | 92% | 3.9 m/s | 1.9 |
| 1997 | 8.2°C | 5.8°C | 3.4°C | 11.0°C | -1.8°C | 119 mm | 93% | 4.7 m/s | 2 |
| 1996 | 5.3°C | 2.5°C | -0.2°C | 9.8°C | -2.9°C | 67 mm | 91% | 3.8 m/s | 2.1 |
| 1995 | 4.7°C | 2.4°C | 0.1°C | 10.5°C | -4.0°C | 121 mm | 91% | 4.6 m/s | 2 |
| 1994 🌧️ | 6.0°C | 3.8°C | 1.6°C | 9.2°C | -2.7°C | 192 mm | 91% | 6.4 m/s | 1.7 |
| 1993 | 6.8°C | 4.3°C | 1.8°C | 11.2°C | -2.7°C | 110 mm | 92% | 4.7 m/s | 1.8 |
| 1992 | 7.0°C | 4.8°C | 2.6°C | 9.9°C | -0.9°C | 164 mm | 92% | 5.2 m/s | 2 |
| 1991 | 7.8°C | 5.2°C | 2.7°C | 10.6°C | -1.6°C | 118 mm | 94% | 3.4 m/s | 1.8 |
| 1990 | 7.8°C | 5.7°C | 3.6°C | 11.9°C | -2.2°C | 151 mm | 92% | 6.4 m/s | 1.7 |
| 1989 | 6.7°C | 4.2°C | 1.8°C | 9.8°C | -3.2°C | 175 mm | 92% | 5.1 m/s | 1.8 |
| 1988 | 5.8°C | 3.5°C | 1.3°C | 10.0°C | -2.4°C | 126 mm | 91% | 3.9 m/s | 1.9 |
| 1987 | 4.2°C | 1.8°C | -0.5°C | 8.0°C | -3.6°C | 130 mm | 92% | 4.2 m/s | 2.2 |
| 1986 | 5.3°C | 3.0°C | 0.7°C | 8.8°C | -8.4°C | 147 mm | 92% | 5.1 m/s | 2.1 |
| 1985 | 5.1°C | 2.5°C | -0.1°C | 9.0°C | -3.3°C | 84 mm | 91% | 3.7 m/s | 1.9 |
| 1984 | 5.4°C | 2.8°C | 0.3°C | 9.3°C | -2.7°C | 75 mm | 90% | 3.2 m/s | 1.9 |
| 1983 | 6.5°C | 4.5°C | 2.5°C | 10.3°C | -1.3°C | 120 mm | 92% | 4.9 m/s | — |
| 1982 | 6.4°C | 3.8°C | 1.3°C | 12.1°C | -1.6°C | 135 mm | 91% | 4.6 m/s | — |
| 1981 | 6.9°C | 4.4°C | 1.8°C | 11.7°C | -2.5°C | 148 mm | 91% | 4.1 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 6.8°C with lows near 1.7°C (mean 4.3°C), based on 45 years of NASA POWER data.
March averages 107 mm of rainfall in Newton Mearns, about average for rainfall. The wettest on record was 192 mm in 1994.
The hottest March reached 15.9°C in 2012. The coldest dipped to -8.4°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 1.6°C. Daytime highs moved from 6.1°C to 8.2°C and overnight lows from 1.2°C to 2.3°C over the same span.
March is one of the cooler months of the year in Newton Mearns and about average for rainfall, so plan for around 6.8°C daytime highs and 1.7°C at night.
Not quite — March is the 4th coolest month in Newton Mearns, averaging 4.3°C.
For March in Newton Mearns, pack warm layers and a jacket for chilly mornings, with typical highs of 6.8°C and lows of 1.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 91% — quite humid.
Average wind speed in March is 4.2 m/s. The windiest March on record averaged 6.4 m/s (1990).
The wettest March on record was 1994 with 192 mm. On average, March 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 Newton Mearns 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.
