March is one of the cooler months of the year in Snohomish, with average highs near 7.8°C and lows around 0.8°C (mean 4.3°C). It is a relatively wet time of year, averaging 189 mm of rainfall and 88% relative humidity across the period.
March is one of the cooler months of the year in Snohomish. Across 45 years of records, the warmest March in Snohomish was 1992 — when the month averaged 8.4°C — while the coldest was 2009 at 1.1°C. Typical March days reach 7.8°C with nights near 0.8°C. The long-term trend is cooling, about 0.3°C per decade.
March is a relatively wet time of year in Snohomish, averaging 189 mm of rainfall. The wettest March on record was 2014 with 387 mm, while the driest was 1992 at 40 mm.
Relative humidity in Snohomish during March averages 88%. The most humid March was 2025 at 95%, and the least humid was 1992 at 77%.
March receives about 2.9 kWh/m²/day of solar energy in Snohomish. The sunniest March was 2019 at 3.7 kWh/m²/day, and the cloudiest was 2017 at 2.3.
Average wind speed in Snohomish during March is 0.3 m/s. The windiest Marchs were 1985 and 2021 at 0.4 m/s, while the calmest was 2007 at 0.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 4.5°C | 4.8°C | 3.9°C | 4.2°C | 3.8°C | -0.7°C |
| Avg High | 8.2°C | 8.6°C | 7.1°C | 7.6°C | 7.0°C | -1.2°C |
| Avg Low | 0.8°C | 1.0°C | 0.6°C | 0.8°C | 0.5°C | -0.3°C |
| Avg Rain | 185 mm | 161 mm | 192 mm | 230 mm | 170 mm | -15 mm |
March temperatures in Snohomish have fallen by about 0.5°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -12.3°C (1989) to a record high of 22.6°C (1994).
Rainfall in March is a relatively wet time of year, averaging 189 mm, with a wettest year of 387 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.4°C per decade while lows fell 0.1°C per decade, narrowing the gap between day and night.
A good time to visit Snohomish
March is a good time to visit Snohomish, with days averaging 7.8°C and nights around 0.8°C (mean 4.3°C, cooler than Snohomish'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 | 5.9°C | 3.5°C | 1.0°C | 12.6°C | -2.8°C | 290 mm | 95% | 0.3 m/s | 2.6 |
| 2024 | 8.8°C | 5.0°C | 1.3°C | 20.3°C | -7.0°C | 141 mm | 88% | 0.3 m/s | 3.1 |
| 2023 | 6.2°C | 2.8°C | -0.6°C | 13.9°C | -6.2°C | 145 mm | 89% | 0.3 m/s | 3 |
| 2022 | 8.3°C | 5.1°C | 1.8°C | 17.4°C | -6.0°C | 162 mm | 89% | 0.3 m/s | 2.9 |
| 2021 | 6.7°C | 3.2°C | -0.3°C | 13.8°C | -4.8°C | 123 mm | 88% | 0.4 m/s | 3.3 |
| 2020 | 6.2°C | 2.9°C | -0.3°C | 11.3°C | -8.1°C | 158 mm | 87% | 0.3 m/s | 3.2 |
| 2019 | 8.7°C | 4.0°C | -0.6°C | 17.9°C | -9.5°C | 47 mm | 82% | 0.3 m/s | 3.7 |
| 2018 | 7.2°C | 3.4°C | -0.3°C | 12.2°C | -5.9°C | 129 mm | 89% | 0.3 m/s | 3.1 |
| 2017 | 5.8°C | 3.5°C | 1.2°C | 9.8°C | -1.8°C | 357 mm | 95% | 0.3 m/s | 2.3 |
| 2016 | 9.0°C | 5.6°C | 2.2°C | 18.8°C | -4.0°C | 257 mm | 87% | 0.3 m/s | 2.9 |
| 2015 | 11.3°C | 7.6°C | 3.8°C | 18.2°C | -3.2°C | 185 mm | 83% | 0.3 m/s | 3.1 |
| 2014 🌧️ | 7.3°C | 4.2°C | 1.1°C | 12.9°C | -5.9°C | 387 mm | 90% | 0.3 m/s | 2.8 |
| 2013 | 7.1°C | 3.7°C | 0.3°C | 19.2°C | -6.9°C | 192 mm | 89% | 0.3 m/s | 2.9 |
| 2012 | 4.5°C | 2.0°C | -0.6°C | 10.4°C | -5.2°C | 284 mm | 93% | 0.3 m/s | 2.6 |
| 2011 | 6.1°C | 3.2°C | 0.3°C | 12.5°C | -5.3°C | 305 mm | 92% | 0.3 m/s | 2.4 |
| 2010 | 8.7°C | 4.9°C | 1.0°C | 13.8°C | -3.7°C | 157 mm | 86% | 0.3 m/s | 3.1 |
| 2009 ❄️ | 4.3°C | 1.1°C | -2.1°C | 7.8°C | -9.8°C | 210 mm | 91% | 0.3 m/s | 2.8 |
| 2008 | 4.8°C | 2.0°C | -0.8°C | 7.3°C | -5.1°C | 163 mm | 91% | 0.3 m/s | 2.7 |
| 2007 | 8.1°C | 5.0°C | 1.8°C | 14.0°C | -6.4°C | 292 mm | 91% | 0.2 m/s | 2.6 |
| 2006 | 7.6°C | 3.7°C | -0.3°C | 13.6°C | -7.6°C | 116 mm | 86% | 0.3 m/s | 2.9 |
| 2005 | 10.1°C | 6.2°C | 2.3°C | 18.1°C | -2.4°C | 171 mm | 86% | 0.3 m/s | 3.1 |
| 2004 | 9.0°C | 5.6°C | 2.1°C | 17.5°C | -1.5°C | 154 mm | 88% | 0.3 m/s | 3 |
| 2003 | 7.7°C | 4.8°C | 2.0°C | 15.6°C | -2.7°C | 290 mm | 91% | 0.3 m/s | 2.6 |
| 2002 | 4.4°C | 1.8°C | -0.8°C | 9.9°C | -5.4°C | 209 mm | 91% | 0.3 m/s | 2.6 |
| 2001 | 8.4°C | 4.7°C | 0.9°C | 16.7°C | -2.7°C | 165 mm | 88% | 0.3 m/s | 2.9 |
| 2000 | 6.9°C | 3.8°C | 0.6°C | 13.5°C | -3.2°C | 151 mm | 89% | 0.3 m/s | 3 |
| 1999 | 6.2°C | 3.0°C | -0.2°C | 16.4°C | -6.6°C | 161 mm | 90% | 0.3 m/s | 2.8 |
| 1998 | 8.4°C | 5.0°C | 1.7°C | 15.4°C | -4.0°C | 158 mm | 88% | 0.3 m/s | 3 |
| 1997 | 6.1°C | 3.4°C | 0.8°C | 14.4°C | -3.6°C | 358 mm | 92% | 0.3 m/s | 2.6 |
| 1996 | 8.3°C | 4.3°C | 0.3°C | 15.5°C | -5.4°C | 101 mm | 83% | 0.3 m/s | 3.1 |
| 1995 | 8.7°C | 4.7°C | 0.7°C | 17.7°C | -6.0°C | 182 mm | 84% | 0.3 m/s | 3 |
| 1994 | 10.3°C | 5.9°C | 1.5°C | 22.6°C | -5.8°C | 144 mm | 83% | 0.3 m/s | 3.1 |
| 1993 | 9.2°C | 5.2°C | 1.2°C | 13.2°C | -3.3°C | 174 mm | 85% | 0.3 m/s | 2.9 |
| 1992 🔥 | 13.6°C | 8.4°C | 3.1°C | 18.9°C | -1.0°C | 40 mm | 77% | 0.3 m/s | 3.5 |
| 1991 | 7.1°C | 3.4°C | -0.4°C | 17.8°C | -4.0°C | 159 mm | 87% | 0.3 m/s | 3.1 |
| 1990 | 8.3°C | 4.7°C | 1.0°C | 15.7°C | -6.7°C | 137 mm | 86% | 0.3 m/s | 3.1 |
| 1989 | 5.9°C | 2.8°C | -0.3°C | 10.9°C | -12.3°C | 231 mm | 92% | 0.3 m/s | 2.5 |
| 1988 | 7.4°C | 3.8°C | 0.3°C | 15.3°C | -4.4°C | 278 mm | 88% | 0.3 m/s | 2.9 |
| 1987 | 9.5°C | 5.6°C | 1.7°C | 18.7°C | -3.6°C | 208 mm | 86% | 0.3 m/s | 3.1 |
| 1986 | 10.1°C | 6.2°C | 2.2°C | 15.7°C | -1.3°C | 140 mm | 87% | 0.3 m/s | 2.8 |
| 1985 | 5.9°C | 2.3°C | -1.2°C | 11.5°C | -7.5°C | 133 mm | 87% | 0.4 m/s | 3.3 |
| 1984 | 9.1°C | 5.6°C | 2.0°C | 15.9°C | -1.8°C | 182 mm | 89% | 0.3 m/s | 3.1 |
| 1983 | 9.6°C | 5.8°C | 2.0°C | 13.0°C | -0.7°C | 212 mm | 88% | 0.3 m/s | — |
| 1982 | 6.1°C | 2.6°C | -0.9°C | 12.7°C | -5.8°C | 156 mm | 88% | 0.3 m/s | — |
| 1981 | 10.1°C | 5.9°C | 1.6°C | 15.8°C | -3.0°C | 125 mm | 82% | 0.3 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 7.8°C with lows near 0.8°C (mean 4.3°C), based on 45 years of NASA POWER data.
March averages 189 mm of rainfall in Snohomish, a relatively wet time of year. The wettest on record was 387 mm in 2014.
The hottest March reached 22.6°C in 1994. The coldest dipped to -12.3°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have fallen by about 0.5°C. Daytime highs moved from 8.2°C to 7.2°C and overnight lows from 0.7°C to 0.6°C over the same span.
March is one of the cooler months of the year in Snohomish and a relatively wet time of year, so plan for around 7.8°C daytime highs and 0.8°C at night.
Not quite — March is the 5th coolest month in Snohomish, averaging 4.3°C.
For March in Snohomish, pack warm layers and a jacket for chilly mornings, with typical highs of 7.8°C and lows of 0.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 88% — quite humid.
Average wind speed in March is 0.3 m/s. The windiest March on record averaged 0.4 m/s (1985).
The wettest March on record was 2014 with 387 mm. On average, March sees 189 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 Snohomish 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.
