March is one of the cooler months of the year in Chatham, with average highs near 0.3°C and lows around -8.7°C (mean -4.2°C). It is about average for rainfall, averaging 66 mm of rainfall and 88% relative humidity across the period.
March is one of the cooler months of the year in Chatham. Across 45 years of records, the warmest March in Chatham was 2024 — when the month averaged -0.4°C — while the coldest was 2008 at -8.6°C. Typical March days reach 0.3°C with nights near -8.7°C. The long-term trend is warming, about 0.6°C per decade.
March is about average for rainfall in Chatham, averaging 66 mm of rainfall. The wettest March on record was 1991 with 138 mm, while the driest was 2015 at 26 mm.
Relative humidity in Chatham during March averages 88%. The most humid Marchs were 1982 and 2008 at 99%, and the least humid was 2002 at 76%.
March receives about 3.3 kWh/m²/day of solar energy in Chatham. The sunniest Marchs were 1985 and 1992 at 3.7 kWh/m²/day, and the cloudiest was 2018 at 2.7.
Average wind speed in Chatham during March is 0.7 m/s. The windiest Marchs were 2007, 2018 and 2021, among others at 0.8 m/s, while the calmest were 2006, 2019 and 2023, among others at 0.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -5.4°C | -4.4°C | -4.2°C | -4.0°C | -2.3°C | +3.1°C |
| Avg High | -1.0°C | 0.1°C | 0.4°C | 0.5°C | 2.2°C | +3.2°C |
| Avg Low | -9.8°C | -8.8°C | -8.7°C | -8.5°C | -6.8°C | +3°C |
| Avg Rain | 81 mm | 63 mm | 79 mm | 50 mm | 55 mm | -27 mm |
March temperatures in Chatham have risen by about 3.2°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -28.1°C (1982) to a record high of 22.3°C (2012).
Rainfall in March is about average for rainfall, averaging 66 mm, with a wettest year of 138 mm.
A quieter season to visit Chatham
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Chatham. That said, March — with days averaging 0.3°C and nights around -8.7°C (mean -4.2°C) and moderate rainfall (66 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 | 3.2°C | -1.8°C | -6.7°C | 12.2°C | -17.4°C | 86 mm | 82% | 0.7 m/s | 3.4 |
| 2024 🔥 | 3.2°C | -0.4°C | -4.1°C | 10.4°C | -13.6°C | 89 mm | 84% | 0.7 m/s | 3.2 |
| 2023 | 1.8°C | -2.4°C | -6.6°C | 6.7°C | -16.6°C | 37 mm | 85% | 0.6 m/s | 3.3 |
| 2022 | 1.1°C | -3.3°C | -7.6°C | 10.2°C | -21.2°C | 50 mm | 83% | 0.7 m/s | 3.1 |
| 2021 | 3.1°C | -2.4°C | -8.0°C | 16.9°C | -16.9°C | 34 mm | 80% | 0.8 m/s | 3.5 |
| 2020 | 1.0°C | -3.5°C | -8.0°C | 9.1°C | -14.8°C | 31 mm | 80% | 0.7 m/s | 3.2 |
| 2019 | 0.3°C | -4.5°C | -9.4°C | 14.3°C | -20.5°C | 32 mm | 85% | 0.6 m/s | 3.3 |
| 2018 | 0.6°C | -2.4°C | -5.4°C | 8.0°C | -14.3°C | 56 mm | 87% | 0.8 m/s | 2.7 |
| 2017 | -1.1°C | -5.9°C | -10.7°C | 5.6°C | -20.2°C | 42 mm | 80% | 0.7 m/s | 3.4 |
| 2016 | 0.2°C | -4.6°C | -9.4°C | 6.7°C | -19.1°C | 62 mm | 83% | 0.7 m/s | 3.2 |
| 2015 | -1.4°C | -6.6°C | -11.8°C | 5.5°C | -26.2°C | 26 mm | 87% | 0.7 m/s | 3.3 |
| 2014 | -3.4°C | -8.4°C | -13.5°C | 4.8°C | -25.0°C | 56 mm | 87% | 0.7 m/s | 3.2 |
| 2013 | 2.2°C | -1.2°C | -4.7°C | 10.6°C | -14.4°C | 59 mm | 86% | 0.7 m/s | 2.8 |
| 2012 | 4.1°C | -1.0°C | -6.1°C | 22.3°C | -18.8°C | 38 mm | 83% | 0.7 m/s | 3.6 |
| 2011 | 0.3°C | -4.3°C | -8.9°C | 9.2°C | -23.6°C | 59 mm | 88% | 0.7 m/s | 3.3 |
| 2010 | 3.6°C | -1.0°C | -5.6°C | 11.2°C | -13.6°C | 68 mm | 84% | 0.7 m/s | 3.4 |
| 2009 | 0.8°C | -4.4°C | -9.6°C | 11.2°C | -20.6°C | 55 mm | 86% | 0.7 m/s | 3.3 |
| 2008 ❄️ | -3.3°C | -8.6°C | -13.9°C | 0.4°C | -24.2°C | 118 mm | 99% | 0.7 m/s | 3.3 |
| 2007 | -0.3°C | -4.6°C | -8.9°C | 6.9°C | -22.3°C | 84 mm | 88% | 0.8 m/s | 3.3 |
| 2006 | 2.2°C | -2.0°C | -6.1°C | 12.6°C | -17.4°C | 39 mm | 86% | 0.6 m/s | 2.9 |
| 2005 | 1.1°C | -3.1°C | -7.3°C | 8.2°C | -16.7°C | 85 mm | 84% | 0.7 m/s | 3.2 |
| 2004 | 1.4°C | -3.3°C | -8.1°C | 12.3°C | -16.2°C | 54 mm | 84% | 0.7 m/s | 3.4 |
| 2003 | -2.2°C | -6.9°C | -11.6°C | 9.9°C | -24.3°C | 137 mm | 98% | 0.7 m/s | 3.1 |
| 2002 | 1.5°C | -3.3°C | -8.0°C | 10.8°C | -12.6°C | 67 mm | 76% | 0.7 m/s | 3.3 |
| 2001 | -0.7°C | -4.6°C | -8.6°C | 9.0°C | -26.7°C | 79 mm | 93% | 0.8 m/s | 3.1 |
| 2000 | 3.4°C | -1.0°C | -5.3°C | 12.4°C | -17.1°C | 75 mm | 87% | 0.6 m/s | 3.2 |
| 1999 | 3.1°C | -0.9°C | -4.8°C | 17.1°C | -11.5°C | 83 mm | 86% | 0.8 m/s | 3 |
| 1998 | 2.3°C | -2.1°C | -6.4°C | 14.7°C | -15.1°C | 53 mm | 85% | 0.7 m/s | 3.1 |
| 1997 | -2.8°C | -7.2°C | -11.6°C | 6.0°C | -23.9°C | 48 mm | 89% | 0.8 m/s | 3.2 |
| 1996 | 0.6°C | -3.8°C | -8.2°C | 7.5°C | -18.8°C | 48 mm | 83% | 0.7 m/s | 3.3 |
| 1995 | -0.3°C | -4.5°C | -8.6°C | 7.1°C | -22.1°C | 57 mm | 90% | 0.7 m/s | 3 |
| 1994 | 0.3°C | -3.8°C | -7.8°C | 5.2°C | -19.8°C | 87 mm | 91% | 0.6 m/s | 3.1 |
| 1993 | -0.7°C | -5.6°C | -10.6°C | 14.3°C | -23.3°C | 39 mm | 91% | 0.8 m/s | 3.3 |
| 1992 | -2.1°C | -7.2°C | -12.3°C | 8.5°C | -24.2°C | 39 mm | 91% | 0.7 m/s | 3.7 |
| 1991 🌧️ | 0.3°C | -3.7°C | -7.7°C | 5.8°C | -15.9°C | 138 mm | 94% | 0.7 m/s | 3.4 |
| 1990 | -0.1°C | -4.9°C | -9.7°C | 7.5°C | -22.3°C | 41 mm | 87% | 0.7 m/s | 3.5 |
| 1989 | -1.1°C | -6.4°C | -11.7°C | 15.4°C | -25.7°C | 59 mm | 92% | 0.7 m/s | 3.4 |
| 1988 | -1.0°C | -5.8°C | -10.7°C | 10.3°C | -20.0°C | 30 mm | 97% | 0.7 m/s | 3.4 |
| 1987 | -0.8°C | -4.5°C | -8.2°C | 13.3°C | -19.9°C | 80 mm | 96% | 0.7 m/s | 3.1 |
| 1986 | -0.2°C | -5.5°C | -10.9°C | 13.7°C | -21.8°C | 90 mm | 89% | 0.8 m/s | 3.2 |
| 1985 | -0.9°C | -5.8°C | -10.6°C | 10.7°C | -23.0°C | 56 mm | 86% | 0.8 m/s | 3.7 |
| 1984 | -4.0°C | -7.8°C | -11.6°C | 0.9°C | -27.3°C | 115 mm | 98% | 0.8 m/s | 3.1 |
| 1983 | 0.5°C | -3.5°C | -7.4°C | 12.2°C | -18.4°C | 113 mm | 92% | 0.7 m/s | — |
| 1982 | -3.1°C | -7.6°C | -12.0°C | 0.7°C | -28.1°C | 63 mm | 99% | 0.7 m/s | — |
| 1981 | 1.8°C | -1.8°C | -5.4°C | 9.4°C | -14.8°C | 127 mm | 90% | 0.7 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 0.3°C with lows near -8.7°C (mean -4.2°C), based on 45 years of NASA POWER data.
March averages 66 mm of rainfall in Chatham, about average for rainfall. The wettest on record was 138 mm in 1991.
The hottest March reached 22.3°C in 2012. The coldest dipped to -28.1°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 3.2°C. Daytime highs moved from -1.1°C to 2.5°C and overnight lows from -9.4°C to -6.6°C over the same span.
March is one of the cooler months of the year in Chatham and about average for rainfall, so plan for around 0.3°C daytime highs and -8.7°C at night.
Not quite — March is the 4th coolest month in Chatham, averaging -4.2°C.
For March in Chatham, pack warm layers and a jacket for chilly mornings, with typical highs of 0.3°C and lows of -8.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 88% — quite humid.
Average wind speed in March is 0.7 m/s. The windiest March on record averaged 0.8 m/s (1984).
The wettest March on record was 1991 with 138 mm. On average, March sees 66 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 Chatham 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.
