March is one of the cooler months of the year in Bellingham, with average highs near 9.5°C and lows around 2°C (mean 5.8°C). It is a relatively wet time of year, averaging 137 mm of rainfall and 84% relative humidity across the period.
March is one of the cooler months of the year in Bellingham. Across 45 years of records, the warmest March in Bellingham was 1992 — when the month averaged 9.6°C — while the coldest was 2009 at 2.9°C. Typical March days reach 9.5°C with nights near 2°C. The long-term trend is cooling, about 0.2°C per decade.
March is a relatively wet time of year in Bellingham, averaging 137 mm of rainfall. The wettest March on record was 2017 with 290 mm, while the driest was 1992 at 23 mm.
Relative humidity in Bellingham during March averages 84%. The most humid March was 2025 at 92%, and the least humid was 1992 at 76%.
March receives about 3 kWh/m²/day of solar energy in Bellingham. The sunniest March was 2019 at 3.9 kWh/m²/day, and the cloudiest was 2017 at 2.4.
Average wind speed in Bellingham during March is 0.8 m/s. The windiest Marchs were 1997, 1999 and 2006 at 0.9 m/s, while the calmest was 1992 at 0.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 6.0°C | 6.2°C | 5.3°C | 5.9°C | 5.4°C | -0.6°C |
| Avg High | 10.1°C | 10.2°C | 8.8°C | 9.5°C | 8.9°C | -1.2°C |
| Avg Low | 2.0°C | 2.1°C | 1.8°C | 2.4°C | 1.9°C | -0.1°C |
| Avg Rain | 125 mm | 113 mm | 146 mm | 170 mm | 128 mm | +3 mm |
March temperatures in Bellingham have fallen by about 0.5°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -10.7°C (2009) to a record high of 21°C (1994).
Rainfall in March is a relatively wet time of year, averaging 137 mm, with a wettest year of 290 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.3°C per decade while lows rose 0°C per decade, narrowing the gap between day and night.
A good time to visit Bellingham
March is a good time to visit Bellingham, with days averaging 9.5°C and nights around 2°C (mean 5.8°C, cooler than Bellingham's yearly average) and higher rainfall. August and July are marginally more temperate, but March still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 8.0°C | 5.2°C | 2.3°C | 14.4°C | -1.3°C | 221 mm | 92% | 0.8 m/s | 2.6 |
| 2024 | 9.9°C | 6.1°C | 2.3°C | 19.4°C | -5.0°C | 108 mm | 85% | 0.7 m/s | 3.1 |
| 2023 | 8.8°C | 5.0°C | 1.3°C | 14.8°C | -3.0°C | 90 mm | 83% | 0.8 m/s | 3.1 |
| 2022 | 9.7°C | 6.5°C | 3.3°C | 14.6°C | -1.9°C | 149 mm | 87% | 0.7 m/s | 2.9 |
| 2021 | 9.2°C | 5.3°C | 1.4°C | 13.2°C | -2.2°C | 89 mm | 83% | 0.8 m/s | 3.3 |
| 2020 | 8.0°C | 4.4°C | 0.8°C | 13.7°C | -5.2°C | 112 mm | 83% | 0.8 m/s | 3.3 |
| 2019 | 10.9°C | 6.2°C | 1.5°C | 19.7°C | -6.9°C | 35 mm | 78% | 0.7 m/s | 3.9 |
| 2018 | 8.9°C | 5.2°C | 1.6°C | 15.1°C | -2.2°C | 103 mm | 85% | 0.7 m/s | 3.1 |
| 2017 🌧️ | 7.7°C | 4.9°C | 2.2°C | 12.4°C | -2.1°C | 290 mm | 92% | 0.8 m/s | 2.4 |
| 2016 | 11.0°C | 7.3°C | 3.6°C | 19.6°C | -1.2°C | 186 mm | 86% | 0.8 m/s | 3 |
| 2015 | 12.4°C | 8.7°C | 4.9°C | 18.3°C | -2.4°C | 160 mm | 82% | 0.7 m/s | 3 |
| 2014 | 9.0°C | 5.7°C | 2.3°C | 13.5°C | -2.1°C | 254 mm | 88% | 0.7 m/s | 2.8 |
| 2013 | 9.5°C | 5.8°C | 2.1°C | 16.9°C | -2.3°C | 191 mm | 84% | 0.7 m/s | 3 |
| 2012 | 6.9°C | 4.0°C | 1.1°C | 13.3°C | -2.9°C | 190 mm | 88% | 0.8 m/s | 2.6 |
| 2011 | 8.4°C | 5.0°C | 1.6°C | 13.7°C | -2.5°C | 172 mm | 88% | 0.8 m/s | 2.5 |
| 2010 | 10.4°C | 6.5°C | 2.6°C | 16.3°C | -1.6°C | 114 mm | 84% | 0.8 m/s | 3 |
| 2009 ❄️ | 6.6°C | 2.9°C | -0.8°C | 12.5°C | -10.7°C | 134 mm | 84% | 0.8 m/s | 2.9 |
| 2008 | 7.7°C | 4.2°C | 0.7°C | 12.7°C | -3.3°C | 109 mm | 86% | 0.7 m/s | 2.7 |
| 2007 | 9.6°C | 6.3°C | 3.1°C | 17.0°C | -1.1°C | 283 mm | 87% | 0.7 m/s | 2.5 |
| 2006 | 9.3°C | 5.2°C | 1.2°C | 15.8°C | -4.1°C | 77 mm | 84% | 0.9 m/s | 3.1 |
| 2005 | 11.6°C | 7.8°C | 4.1°C | 16.3°C | -0.8°C | 131 mm | 82% | 0.8 m/s | 3.1 |
| 2004 | 10.1°C | 6.4°C | 2.7°C | 18.9°C | -1.4°C | 144 mm | 87% | 0.7 m/s | 3.1 |
| 2003 | 9.1°C | 6.0°C | 2.9°C | 14.4°C | -2.5°C | 208 mm | 88% | 0.8 m/s | 2.5 |
| 2002 | 6.0°C | 3.0°C | -0.1°C | 12.5°C | -6.9°C | 111 mm | 86% | 0.8 m/s | 2.6 |
| 2001 | 9.5°C | 5.7°C | 2.0°C | 17.3°C | -2.2°C | 136 mm | 87% | 0.7 m/s | 2.9 |
| 2000 | 8.6°C | 5.3°C | 1.9°C | 12.7°C | -2.4°C | 127 mm | 85% | 0.8 m/s | 3 |
| 1999 | 8.1°C | 4.8°C | 1.4°C | 14.8°C | -3.9°C | 138 mm | 87% | 0.9 m/s | 2.9 |
| 1998 | 10.2°C | 6.5°C | 2.9°C | 16.1°C | -2.5°C | 100 mm | 85% | 0.7 m/s | 3 |
| 1997 | 8.2°C | 5.0°C | 1.8°C | 13.9°C | -3.7°C | 259 mm | 87% | 0.9 m/s | 2.7 |
| 1996 | 9.8°C | 5.7°C | 1.5°C | 14.6°C | -3.3°C | 65 mm | 80% | 0.7 m/s | 3.1 |
| 1995 | 10.3°C | 6.2°C | 2.1°C | 18.1°C | -4.4°C | 109 mm | 80% | 0.8 m/s | 3.2 |
| 1994 | 11.6°C | 7.0°C | 2.5°C | 21.0°C | -2.8°C | 107 mm | 80% | 0.7 m/s | 3.3 |
| 1993 | 10.5°C | 6.3°C | 2.1°C | 13.6°C | -1.4°C | 135 mm | 83% | 0.8 m/s | 3 |
| 1992 🔥 | 14.5°C | 9.6°C | 4.7°C | 18.5°C | 0.9°C | 23 mm | 76% | 0.6 m/s | 3.7 |
| 1991 | 8.3°C | 4.4°C | 0.5°C | 16.2°C | -3.5°C | 102 mm | 83% | 0.7 m/s | 3.2 |
| 1990 | 10.3°C | 6.0°C | 1.7°C | 15.3°C | -3.7°C | 96 mm | 81% | 0.7 m/s | 3.2 |
| 1989 | 7.7°C | 4.1°C | 0.6°C | 12.3°C | -9.1°C | 155 mm | 86% | 0.8 m/s | 2.7 |
| 1988 | 9.3°C | 5.5°C | 1.7°C | 16.1°C | -4.0°C | 163 mm | 84% | 0.8 m/s | 2.9 |
| 1987 | 11.3°C | 7.2°C | 3.1°C | 19.5°C | -1.9°C | 137 mm | 82% | 0.7 m/s | 3.1 |
| 1986 | 11.0°C | 7.0°C | 3.0°C | 17.1°C | -0.6°C | 139 mm | 86% | 0.7 m/s | 2.8 |
| 1985 | 8.6°C | 4.4°C | 0.3°C | 15.5°C | -3.0°C | 89 mm | 82% | 0.8 m/s | 3.3 |
| 1984 | 11.0°C | 7.2°C | 3.4°C | 16.1°C | -0.7°C | 127 mm | 86% | 0.7 m/s | 3 |
| 1983 | 11.4°C | 7.3°C | 3.2°C | 14.5°C | -1.1°C | 135 mm | 84% | 0.8 m/s | — |
| 1982 | 8.6°C | 4.4°C | 0.2°C | 13.4°C | -3.0°C | 79 mm | 82% | 0.7 m/s | — |
| 1981 | 11.8°C | 7.3°C | 2.8°C | 16.1°C | -0.7°C | 100 mm | 80% | 0.7 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 9.5°C with lows near 2°C (mean 5.8°C), based on 45 years of NASA POWER data.
March averages 137 mm of rainfall in Bellingham, a relatively wet time of year. The wettest on record was 290 mm in 2017.
The hottest March reached 21°C in 1994. The coldest dipped to -10.7°C in 2009.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have fallen by about 0.5°C — but days and nights have moved in opposite directions. Overnight lows rose from 2°C to 2.1°C while daytime highs eased from 10.3°C to 9.1°C, narrowing the gap between day and night.
March is one of the cooler months of the year in Bellingham and a relatively wet time of year, so plan for around 9.5°C daytime highs and 2°C at night.
Not quite — March is the 5th coolest month in Bellingham, averaging 5.8°C.
For March in Bellingham, pack warm layers and a jacket for chilly mornings, with typical highs of 9.5°C and lows of 2°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 84% — quite humid.
Average wind speed in March is 0.8 m/s. The windiest March on record averaged 0.9 m/s (1997).
The wettest March on record was 2017 with 290 mm. On average, March sees 137 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 Bellingham 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.
