April is one of the cooler months of the year in Bothell, with average highs near 13.1°C and lows around 5°C (mean 9.1°C). It is one of the drier months, averaging 96 mm of rainfall and 81% relative humidity across the period.
April is one of the cooler months of the year in Bothell. Across 45 years of records, the warmest April in Bothell was 2016 — when the month averaged 12.3°C — while the coldest was 2011 at 6.2°C. Typical April days reach 13.1°C with nights near 5°C. The long-term April temperature trend is broadly flat.
April is one of the drier months in Bothell, averaging 96 mm of rainfall. The wettest April on record was 2018 with 172 mm, while the driest was 2004 at 27 mm.
Relative humidity in Bothell during April averages 81%. The most humid April was 2017 at 85%, and the least humid was 2004 at 76%.
April receives about 4.2 kWh/m²/day of solar energy in Bothell. The sunniest April was 2021 at 5.3 kWh/m²/day, and the cloudiest was 1996 at 3.4.
Average wind speed in Bothell during April is 0.6 m/s. The windiest Aprils were 1981, 1984 and 2017 at 0.8 m/s, while the calmest were 2016, 2020 and 2025, among others at 0.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 8.9°C | 9.5°C | 8.9°C | 9.1°C | 8.7°C | -0.2°C |
| Avg High | 13.1°C | 13.6°C | 13.0°C | 12.9°C | 12.7°C | -0.4°C |
| Avg Low | 4.8°C | 5.3°C | 4.7°C | 5.2°C | 4.7°C | -0.1°C |
| Avg Rain | 99 mm | 101 mm | 80 mm | 111 mm | 84 mm | -15 mm |
April temperatures in Bothell have stayed relatively stable across the record.
April has ranged from a record low of -1.5°C (2010) to a record high of 29.5°C (2016).
Rainfall in April is one of the drier months, averaging 96 mm, with a wettest year of 172 mm.
A good time to visit Bothell
April is a good time to visit Bothell, with days averaging 13.1°C and nights around 5°C (mean 9.1°C, cooler than Bothell'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 | 12.9°C | 8.8°C | 4.7°C | 19.0°C | 2.4°C | 70 mm | 83% | 0.5 m/s | 5 |
| 2024 | 12.6°C | 8.6°C | 4.6°C | 17.8°C | 2.9°C | 88 mm | 83% | 0.6 m/s | 4.6 |
| 2023 | 11.6°C | 8.1°C | 4.6°C | 26.0°C | 0.3°C | 124 mm | 85% | 0.7 m/s | 3.8 |
| 2022 | 10.7°C | 7.2°C | 3.6°C | 18.8°C | -0.7°C | 125 mm | 82% | 0.7 m/s | 4 |
| 2021 | 14.7°C | 10.2°C | 5.6°C | 24.8°C | 0.0°C | 47 mm | 77% | 0.6 m/s | 5.3 |
| 2020 | 13.7°C | 9.5°C | 5.3°C | 17.7°C | 0.8°C | 53 mm | 79% | 0.5 m/s | 4.8 |
| 2019 | 13.4°C | 9.5°C | 5.7°C | 19.0°C | 3.7°C | 95 mm | 82% | 0.6 m/s | 4 |
| 2018 🌧️ | 13.1°C | 9.3°C | 5.6°C | 24.5°C | 1.2°C | 172 mm | 83% | 0.6 m/s | 3.7 |
| 2017 | 12.0°C | 8.7°C | 5.3°C | 17.3°C | 2.9°C | 132 mm | 85% | 0.8 m/s | 3.6 |
| 2016 🔥 | 16.9°C | 12.3°C | 7.7°C | 29.5°C | 5.0°C | 49 mm | 79% | 0.5 m/s | 4.7 |
| 2015 | 13.3°C | 9.1°C | 4.9°C | 21.7°C | 2.3°C | 55 mm | 79% | 0.7 m/s | 4.6 |
| 2014 | 13.6°C | 9.4°C | 5.3°C | 22.9°C | 3.4°C | 116 mm | 82% | 0.6 m/s | 4.3 |
| 2013 | 12.1°C | 8.5°C | 5.0°C | 18.8°C | 1.5°C | 142 mm | 82% | 0.6 m/s | 4 |
| 2012 | 13.1°C | 9.2°C | 5.3°C | 21.6°C | 1.9°C | 112 mm | 82% | 0.5 m/s | 4 |
| 2011 ❄️ | 9.7°C | 6.2°C | 2.6°C | 16.9°C | -0.5°C | 131 mm | 83% | 0.7 m/s | 3.8 |
| 2010 | 12.2°C | 8.4°C | 4.5°C | 18.5°C | -1.5°C | 104 mm | 82% | 0.7 m/s | 3.8 |
| 2009 | 12.9°C | 8.4°C | 3.9°C | 20.8°C | -0.8°C | 87 mm | 78% | 0.6 m/s | 4.5 |
| 2008 | 10.5°C | 6.5°C | 2.5°C | 19.4°C | -1.0°C | 68 mm | 81% | 0.6 m/s | 4 |
| 2007 | 12.7°C | 8.8°C | 4.8°C | 21.4°C | 0.5°C | 73 mm | 81% | 0.6 m/s | 4 |
| 2006 | 13.5°C | 9.2°C | 4.8°C | 21.9°C | 2.3°C | 79 mm | 81% | 0.6 m/s | 4.3 |
| 2005 | 13.7°C | 9.8°C | 5.9°C | 24.2°C | 2.2°C | 113 mm | 82% | 0.7 m/s | 4 |
| 2004 | 16.0°C | 11.0°C | 6.0°C | 26.7°C | 1.1°C | 27 mm | 76% | 0.6 m/s | 5.2 |
| 2003 | 12.2°C | 8.6°C | 5.0°C | 18.5°C | 1.3°C | 102 mm | 83% | 0.7 m/s | 3.6 |
| 2002 | 12.3°C | 8.5°C | 4.7°C | 18.1°C | 0.8°C | 91 mm | 81% | 0.6 m/s | 4.2 |
| 2001 | 12.1°C | 8.3°C | 4.5°C | 21.2°C | 0.0°C | 91 mm | 81% | 0.7 m/s | 4 |
| 2000 | 13.7°C | 9.5°C | 5.3°C | 21.4°C | 1.4°C | 74 mm | 81% | 0.6 m/s | 4.4 |
| 1999 | 12.8°C | 8.2°C | 3.7°C | 21.5°C | -0.2°C | 52 mm | 78% | 0.6 m/s | 4.5 |
| 1998 | 13.9°C | 9.5°C | 5.1°C | 26.1°C | 2.3°C | 43 mm | 78% | 0.6 m/s | 4.6 |
| 1997 | 13.2°C | 8.8°C | 4.4°C | 19.6°C | 0.1°C | 127 mm | 80% | 0.6 m/s | 4.1 |
| 1996 | 13.6°C | 9.8°C | 5.9°C | 21.3°C | 1.3°C | 152 mm | 84% | 0.7 m/s | 3.4 |
| 1995 | 13.3°C | 9.1°C | 4.8°C | 20.3°C | 1.6°C | 79 mm | 78% | 0.6 m/s | 4.3 |
| 1994 | 14.4°C | 10.4°C | 6.4°C | 21.5°C | 1.8°C | 80 mm | 82% | 0.6 m/s | 3.7 |
| 1993 | 12.7°C | 9.1°C | 5.6°C | 17.1°C | 2.4°C | 139 mm | 84% | 0.7 m/s | 3.7 |
| 1992 | 14.6°C | 10.4°C | 6.3°C | 22.8°C | 2.4°C | 122 mm | 80% | 0.6 m/s | 3.9 |
| 1991 | 12.8°C | 8.8°C | 4.7°C | 19.7°C | 1.8°C | 137 mm | 80% | 0.6 m/s | 4.3 |
| 1990 | 14.8°C | 10.6°C | 6.5°C | 22.8°C | 3.9°C | 78 mm | 80% | 0.5 m/s | 4 |
| 1989 | 15.0°C | 10.4°C | 5.8°C | 24.2°C | 2.7°C | 71 mm | 79% | 0.6 m/s | 4.4 |
| 1988 | 13.7°C | 9.5°C | 5.2°C | 20.6°C | 0.9°C | 129 mm | 82% | 0.6 m/s | 3.6 |
| 1987 | 14.6°C | 10.2°C | 5.8°C | 28.5°C | 1.5°C | 94 mm | 80% | 0.6 m/s | 4.4 |
| 1986 | 11.7°C | 7.8°C | 3.9°C | 20.3°C | 1.1°C | 86 mm | 82% | 0.7 m/s | 3.7 |
| 1985 | 12.8°C | 8.8°C | 4.7°C | 20.0°C | -0.5°C | 96 mm | 82% | 0.6 m/s | 4.1 |
| 1984 | 11.6°C | 7.9°C | 4.3°C | 19.6°C | 1.6°C | 102 mm | 82% | 0.8 m/s | 4.1 |
| 1983 | 14.2°C | 9.8°C | 5.3°C | 22.3°C | 2.2°C | 51 mm | 77% | 0.6 m/s | — |
| 1982 | 11.4°C | 7.3°C | 3.2°C | 21.8°C | 0.4°C | 113 mm | 78% | 0.7 m/s | — |
| 1981 | 12.5°C | 8.6°C | 4.8°C | 21.0°C | -0.3°C | 150 mm | 83% | 0.8 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 13.1°C with lows near 5°C (mean 9.1°C), based on 45 years of NASA POWER data.
April averages 96 mm of rainfall in Bothell, one of the drier months. The wettest on record was 172 mm in 2018.
The hottest April reached 29.5°C in 2016. The coldest dipped to -1.5°C in 2010.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 0.1°C. Daytime highs moved from 12.5°C to 12.5°C and overnight lows from 4.5°C to 4.6°C over the same span.
April is one of the cooler months of the year in Bothell and one of the drier months, so plan for around 13.1°C daytime highs and 5°C at night.
Not quite — April is the 6th coolest month in Bothell, averaging 9.1°C.
For April in Bothell, pack warm layers and a jacket for chilly mornings, with typical highs of 13.1°C and lows of 5°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 81% — quite humid.
Average wind speed in April is 0.6 m/s. The windiest April on record averaged 0.8 m/s (1981).
The wettest April on record was 2018 with 172 mm. On average, April sees 96 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 Bothell 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.
