April is one of the cooler months of the year in Snohomish, with average highs near 11.3°C and lows around 2.9°C (mean 7.1°C). It is one of the drier months, averaging 140 mm of rainfall and 83% relative humidity across the period.
April is one of the cooler months of the year in Snohomish. Across 45 years of records, the warmest April in Snohomish was 2016 — when the month averaged 10.8°C — while the coldest was 2011 at 3.7°C. Typical April days reach 11.3°C with nights near 2.9°C. The long-term April temperature trend is broadly flat.
April is one of the drier months in Snohomish, averaging 140 mm of rainfall. The wettest April on record was 1981 with 245 mm, while the driest was 2004 at 42 mm.
Relative humidity in Snohomish during April averages 83%. The most humid April was 2011 at 88%, and the least humid was 2004 at 77%.
April receives about 4.2 kWh/m²/day of solar energy in Snohomish. The sunniest April was 2021 at 5.3 kWh/m²/day, and the cloudiest was 1996 at 3.4.
Average wind speed in Snohomish during April is 0.3 m/s. The windiest Aprils were 2021, 2022 and 2023, among others at 0.3 m/s, while the calmest were 2018, 2024 and 2025, among others at 0.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 6.9°C | 7.6°C | 7.0°C | 7.1°C | 6.7°C | -0.2°C |
| Avg High | 11.1°C | 11.9°C | 11.3°C | 11.0°C | 11.0°C | -0.1°C |
| Avg Low | 2.6°C | 3.3°C | 2.6°C | 3.2°C | 2.4°C | -0.2°C |
| Avg Rain | 150 mm | 142 mm | 115 mm | 163 mm | 124 mm | -26 mm |
April temperatures in Snohomish have risen by about 0.3°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -7.1°C (1981) to a record high of 27.7°C (1987).
Rainfall in April is one of the drier months, averaging 140 mm, with a wettest year of 245 mm.
A good time to visit Snohomish
April is a good time to visit Snohomish, with days averaging 11.3°C and nights around 2.9°C (mean 7.1°C, cooler than Snohomish's yearly average) and higher rainfall. August and July are marginally more temperate, but April still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 11.6°C | 6.8°C | 2.0°C | 19.7°C | -1.2°C | 100 mm | 84% | 0.2 m/s | 5 |
| 2024 | 11.0°C | 6.7°C | 2.4°C | 16.8°C | -0.1°C | 133 mm | 85% | 0.2 m/s | 4.6 |
| 2023 | 9.7°C | 6.1°C | 2.5°C | 24.0°C | -1.7°C | 168 mm | 87% | 0.3 m/s | 3.8 |
| 2022 | 8.5°C | 4.7°C | 0.8°C | 16.1°C | -5.9°C | 182 mm | 86% | 0.3 m/s | 4 |
| 2021 | 13.2°C | 8.2°C | 3.3°C | 24.1°C | -3.3°C | 70 mm | 77% | 0.3 m/s | 5.3 |
| 2020 | 12.2°C | 7.8°C | 3.4°C | 16.6°C | -1.4°C | 90 mm | 81% | 0.3 m/s | 4.8 |
| 2019 | 11.4°C | 7.6°C | 3.7°C | 17.1°C | 1.0°C | 142 mm | 85% | 0.3 m/s | 4 |
| 2018 | 11.2°C | 7.3°C | 3.4°C | 25.3°C | -0.9°C | 237 mm | 85% | 0.2 m/s | 3.7 |
| 2017 | 10.1°C | 6.7°C | 3.2°C | 16.5°C | -0.3°C | 175 mm | 87% | 0.2 m/s | 3.6 |
| 2016 🔥 | 15.6°C | 10.8°C | 5.9°C | 27.4°C | 2.4°C | 68 mm | 80% | 0.2 m/s | 4.7 |
| 2015 | 11.8°C | 7.4°C | 3.1°C | 21.5°C | -0.8°C | 87 mm | 81% | 0.3 m/s | 4.6 |
| 2014 | 11.8°C | 7.6°C | 3.3°C | 21.8°C | 0.1°C | 178 mm | 85% | 0.2 m/s | 4.3 |
| 2013 | 9.9°C | 6.4°C | 3.0°C | 17.5°C | -1.4°C | 218 mm | 85% | 0.3 m/s | 4 |
| 2012 | 11.3°C | 7.3°C | 3.3°C | 21.6°C | -1.1°C | 166 mm | 84% | 0.2 m/s | 4 |
| 2011 ❄️ | 7.1°C | 3.7°C | 0.4°C | 15.2°C | -4.6°C | 202 mm | 88% | 0.3 m/s | 3.8 |
| 2010 | 10.2°C | 6.2°C | 2.3°C | 18.9°C | -6.0°C | 152 mm | 85% | 0.2 m/s | 3.8 |
| 2009 | 10.9°C | 6.3°C | 1.6°C | 20.4°C | -4.2°C | 124 mm | 81% | 0.3 m/s | 4.5 |
| 2008 | 7.6°C | 3.8°C | 0.0°C | 15.2°C | -6.9°C | 103 mm | 87% | 0.3 m/s | 4 |
| 2007 | 10.9°C | 6.9°C | 2.9°C | 19.0°C | -3.1°C | 116 mm | 84% | 0.2 m/s | 4 |
| 2006 | 11.9°C | 7.2°C | 2.6°C | 21.0°C | -0.7°C | 103 mm | 82% | 0.3 m/s | 4.3 |
| 2005 | 12.4°C | 8.1°C | 3.8°C | 22.7°C | -1.5°C | 141 mm | 83% | 0.3 m/s | 4 |
| 2004 | 15.2°C | 9.6°C | 4.0°C | 24.3°C | -1.3°C | 42 mm | 77% | 0.3 m/s | 5.2 |
| 2003 | 10.3°C | 6.5°C | 2.7°C | 17.4°C | -0.7°C | 127 mm | 86% | 0.3 m/s | 3.6 |
| 2002 | 10.9°C | 6.8°C | 2.7°C | 18.6°C | -2.0°C | 154 mm | 83% | 0.3 m/s | 4.2 |
| 2001 | 10.1°C | 6.2°C | 2.2°C | 21.8°C | -2.5°C | 129 mm | 84% | 0.3 m/s | 4 |
| 2000 | 12.7°C | 8.1°C | 3.5°C | 19.5°C | -2.2°C | 114 mm | 81% | 0.2 m/s | 4.4 |
| 1999 | 11.1°C | 6.4°C | 1.7°C | 20.2°C | -2.5°C | 70 mm | 80% | 0.3 m/s | 4.5 |
| 1998 | 13.0°C | 8.0°C | 3.1°C | 26.6°C | -1.5°C | 62 mm | 79% | 0.3 m/s | 4.6 |
| 1997 | 11.0°C | 6.5°C | 2.0°C | 18.7°C | -3.5°C | 185 mm | 83% | 0.2 m/s | 4.1 |
| 1996 | 11.8°C | 7.7°C | 3.6°C | 20.6°C | -0.8°C | 219 mm | 86% | 0.3 m/s | 3.4 |
| 1995 | 11.5°C | 6.9°C | 2.4°C | 19.8°C | -2.1°C | 103 mm | 80% | 0.3 m/s | 4.3 |
| 1994 | 12.9°C | 8.8°C | 4.6°C | 21.2°C | 0.2°C | 117 mm | 84% | 0.2 m/s | 3.7 |
| 1993 | 10.7°C | 7.2°C | 3.6°C | 15.1°C | 0.8°C | 194 mm | 86% | 0.2 m/s | 3.7 |
| 1992 | 12.9°C | 8.6°C | 4.3°C | 21.7°C | -0.3°C | 167 mm | 82% | 0.3 m/s | 3.9 |
| 1991 | 10.9°C | 6.7°C | 2.5°C | 19.8°C | -1.6°C | 196 mm | 83% | 0.3 m/s | 4.3 |
| 1990 | 13.5°C | 9.1°C | 4.8°C | 21.6°C | 1.4°C | 112 mm | 82% | 0.2 m/s | 4 |
| 1989 | 13.7°C | 8.8°C | 3.8°C | 22.9°C | 0.7°C | 112 mm | 79% | 0.3 m/s | 4.4 |
| 1988 | 12.1°C | 7.9°C | 3.6°C | 21.2°C | -1.2°C | 197 mm | 84% | 0.2 m/s | 3.6 |
| 1987 | 13.0°C | 8.5°C | 4.0°C | 27.7°C | -0.5°C | 148 mm | 82% | 0.2 m/s | 4.4 |
| 1986 | 9.6°C | 5.7°C | 1.8°C | 19.8°C | -2.8°C | 124 mm | 85% | 0.3 m/s | 3.7 |
| 1985 | 10.6°C | 6.8°C | 3.0°C | 20.9°C | -4.0°C | 162 mm | 85% | 0.2 m/s | 4.1 |
| 1984 | 9.1°C | 5.6°C | 2.1°C | 17.3°C | -0.6°C | 139 mm | 86% | 0.3 m/s | 4.1 |
| 1983 | 12.5°C | 7.5°C | 2.6°C | 20.9°C | -1.4°C | 70 mm | 79% | 0.3 m/s | — |
| 1982 | 9.1°C | 4.8°C | 0.5°C | 20.8°C | -4.6°C | 155 mm | 81% | 0.3 m/s | — |
| 1981 🌧️ | 10.0°C | 6.2°C | 2.4°C | 20.8°C | -7.1°C | 245 mm | 88% | 0.3 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 11.3°C with lows near 2.9°C (mean 7.1°C), based on 45 years of NASA POWER data.
April averages 140 mm of rainfall in Snohomish, one of the drier months. The wettest on record was 245 mm in 1981.
The hottest April reached 27.7°C in 1987. The coldest dipped to -7.1°C in 1981.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 0.3°C. Daytime highs moved from 10.3°C to 10.8°C and overnight lows from 2.1°C to 2.2°C over the same span.
April is one of the cooler months of the year in Snohomish and one of the drier months, so plan for around 11.3°C daytime highs and 2.9°C at night.
Not quite — April is the 6th coolest month in Snohomish, averaging 7.1°C.
For April in Snohomish, pack warm layers and a jacket for chilly mornings, with typical highs of 11.3°C and lows of 2.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 83% — quite humid.
Average wind speed in April is 0.3 m/s. The windiest April on record averaged 0.3 m/s (1981).
The wettest April on record was 1981 with 245 mm. On average, April sees 140 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 April, 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 April specifically, along with year-by-year records and how the month has changed over the decades.
