May weather in Mill Creek, WA
The average temperature in Mill Creek in May is 55.0°F (47.6°F–62.5°F). Average precipitation: 2.11 inches.
May is a spring month in Mill Creek, and is warmer than the annual average of 51.4°F. Daily temperatures swing about 14.9°F between overnight low and afternoon high. Expect about 14 days with precipitation. Daylight averages about 14h 57m. For travel, May is a comfortable month to visit.
Avg High
62.5°F
Avg Low
47.6°F
Precipitation
2.11 in
Daylight
14h 57m
May records in Mill Creek
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 84.0°F (2014) | 35.1°F (1948) | 0.72 in (1949) |
| May 2 | 82.0°F (2016) | 35.1°F (1948) | 0.35 in (2020) |
| May 3 | 72.0°F (2018) | 36.0°F (1949) | 0.72 in (1948) |
| May 4 | 71.1°F (2013) | 36.0°F (2010) | 0.61 in (2012) |
| May 5 | 75.0°F (2013) | 36.0°F (2002) | 0.81 in (2023) |
| May 6 | 80.1°F (2013) | 35.1°F (2002) | 0.39 in (2024) |
| May 7 | 75.0°F (2016) | 34.0°F (2002) | 0.67 in (2022) |
| May 8 | 73.9°F (2020) | 37.9°F (1950) | 0.34 in (2014) |
| May 9 | 79.0°F (2020) | 37.0°F (1999) | 0.49 in (2000) |
| May 10 | 79.0°F (2019) | 36.0°F (1999) | 0.29 in (1951) |
| May 11 | 81.0°F (2024) | 41.0°F (2012) | 0.75 in (1951) |
| May 12 | 77.0°F (2002) | 39.9°F (1948) | 0.71 in (1948) |
| May 13 | 80.1°F (2023) | 39.0°F (2022) | 0.26 in (2008) |
| May 14 | 84.0°F (2023) | 39.9°F (1950) | 0.93 in (2017) |
| May 15 | 86.0°F (2023) | 39.9°F (1950) | 0.52 in (2017) |
| May 16 | 79.0°F (1952) | 39.0°F (2003) | 0.58 in (2017) |
| May 17 | 88.0°F (2008) | 39.0°F (1950) | 0.68 in (2005) |
| May 18 | 75.0°F (1949) | 37.0°F (1950) | 0.67 in (2005) |
| May 19 | 72.0°F (2008) | 42.1°F (1950) | 0.66 in (2009) |
| May 20 | 75.9°F (1948) | 43.0°F (1950) | 0.50 in (2025) |
| May 21 | 73.9°F (2015) | 43.0°F (2009) | 0.54 in (2024) |
| May 22 | 79.0°F (1951) | 39.9°F (1950) | 0.44 in (2007) |
| May 23 | 78.1°F (2001) | 39.0°F (1950) | 0.47 in (2012) |
| May 24 | 73.9°F (1948) | 41.0°F (1950) | 0.17 in (2019) |
| May 25 | 77.0°F (1950) | 43.0°F (1949) | 0.29 in (2020) |
| May 26 | 82.0°F (2005) | 42.1°F (1999) | 0.37 in (2004) |
| May 27 | 82.9°F (2005) | 41.0°F (1950) | 1.02 in (2004) |
| May 28 | 82.9°F (2025) | 39.9°F (1950) | 1.76 in (1948) |
| May 29 | 73.0°F (2009) | 37.9°F (1951) | 0.70 in (1948) |
| May 30 | 78.1°F (2007) | 39.0°F (1951) | 1.03 in (2020) |
| May 31 | 75.9°F (2001) | 43.0°F (1950) | 0.59 in (2005) |