April weather in Issaquah, WA
The average temperature in Issaquah in April is 51.3°F (43.1°F–59.5°F). Average precipitation: 2.83 inches.
April is a spring month in Issaquah, and is cooler than the annual average of 53.6°F. Daily temperatures swing about 16.4°F between overnight low and afternoon high. Expect about 14 days with precipitation. Daylight averages about 13h 24m. For travel, April is a comfortable month to visit.
Avg High
59.5°F
Avg Low
43.1°F
Precipitation
2.83 in
Daylight
13h 24m
April records in Issaquah
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| April 1 | 70.0°F (2016) | 32.0°F (2008) | 1.00 in (2011) |
| April 2 | 70.0°F (2024) | 31.1°F (2008) | 0.95 in (2009) |
| April 3 | 73.9°F (2004) | 31.1°F (2007) | 0.41 in (2005) |
| April 4 | 64.9°F (2002) | 33.1°F (2009) | 0.34 in (2022) |
| April 5 | 72.0°F (2025) | 34.0°F (2021) | 0.70 in (2013) |
| April 6 | 78.1°F (2007) | 34.0°F (1999) | 0.61 in (2013) |
| April 7 | 77.0°F (2016) | 33.1°F (2011) | 0.99 in (2013) |
| April 8 | 75.0°F (2016) | 32.0°F (2011) | 0.42 in (2006) |
| April 9 | 68.0°F (2004) | 34.0°F (2008) | 0.58 in (2002) |
| April 10 | 75.0°F (2004) | 33.1°F (2010) | 0.80 in (2001) |
| April 11 | 82.0°F (2004) | 31.1°F (2021) | 0.51 in (2019) |
| April 12 | 80.1°F (2008) | 33.1°F (2020) | 0.73 in (2009) |
| April 13 | 68.0°F (2014) | 33.1°F (2020) | 1.36 in (2002) |
| April 14 | 70.0°F (2014) | 34.0°F (1999) | 1.16 in (2018) |
| April 15 | 75.9°F (1999) | 35.1°F (2009) | 0.38 in (2005) |
| April 16 | 82.9°F (1999) | 36.0°F (2013) | 0.68 in (2005) |
| April 17 | 78.1°F (2016) | 35.1°F (2024) | 0.76 in (2014) |
| April 18 | 87.1°F (2016) | 36.0°F (2024) | 0.44 in (2017) |
| April 19 | 81.0°F (2016) | 35.1°F (2008) | 0.64 in (2013) |
| April 20 | 81.0°F (2016) | 33.1°F (2008) | 0.61 in (2025) |
| April 21 | 73.9°F (2016) | 36.0°F (2008) | 0.96 in (2010) |
| April 22 | 79.0°F (2005) | 35.1°F (2013) | 0.43 in (2014) |
| April 23 | 72.0°F (2024) | 35.1°F (2011) | 0.24 in (2014) |
| April 24 | 80.1°F (2018) | 35.1°F (2000) | 0.32 in (2016) |
| April 25 | 75.0°F (2018) | 39.0°F (2002) | 0.42 in (2012) |
| April 26 | 82.0°F (2018) | 34.0°F (2008) | 0.26 in (2002) |
| April 27 | 75.9°F (2015) | 36.0°F (2011) | 0.40 in (2011) |
| April 28 | 79.0°F (2023) | 36.0°F (2019) | 0.26 in (2010) |
| April 29 | 79.0°F (2023) | 37.9°F (2006) | 0.60 in (2006) |
| April 30 | 82.0°F (2014) | 36.0°F (2006) | 0.57 in (2001) |