June weather in Mercer Island, WA
The average temperature in Mercer Island in June is 62.6°F (54.0°F–71.2°F). Average precipitation: 1.22 inches.
June is a summer month in Mercer Island, and is warmer than the annual average of 53.8°F. Daily temperatures swing about 17.2°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 15h 42m. For travel, June is one of the best months of the year to visit.
Avg High
71.2°F
Avg Low
54.0°F
Precipitation
1.22 in
Daylight
15h 42m
June records in Mercer Island
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| June 1 | 89.1°F (1959) | 43.0°F (1951) | 0.49 in (2005) |
| June 2 | 87.1°F (2009) | 44.1°F (1951) | 0.47 in (1963) |
| June 3 | 87.1°F (1950) | 45.0°F (1962) | 0.61 in (2008) |
| June 4 | 88.0°F (2009) | 44.1°F (1954) | 0.57 in (2006) |
| June 5 | 91.9°F (2016) | 45.0°F (1953) | 0.51 in (2022) |
| June 6 | 89.1°F (2003) | 43.0°F (2012) | 0.54 in (2008) |
| June 7 | 93.0°F (2003) | 44.1°F (2002) | 0.55 in (2012) |
| June 8 | 87.1°F (2025) | 44.1°F (2002) | 0.50 in (1956) |
| June 9 | 99.0°F (1955) | 46.0°F (2008) | 0.89 in (2022) |
| June 10 | 81.0°F (2015) | 46.0°F (1961) | 0.41 in (1956) |
| June 11 | 82.0°F (2019) | 42.1°F (1952) | 1.27 in (2001) |
| June 12 | 93.9°F (2019) | 41.0°F (1952) | 0.54 in (1953) |
| June 13 | 91.0°F (2002) | 45.0°F (1952) | 0.49 in (2021) |
| June 14 | 82.9°F (1961) | 45.0°F (1955) | 0.31 in (1960) |
| June 15 | 88.0°F (1963) | 45.0°F (2016) | 0.90 in (2017) |
| June 16 | 87.1°F (1961) | 44.1°F (1954) | 0.48 in (2005) |
| June 17 | 91.0°F (1958) | 45.0°F (1954) | 0.85 in (1964) |
| June 18 | 90.0°F (1958) | 45.0°F (1949) | 0.31 in (2011) |
| June 19 | 87.1°F (1959) | 44.1°F (1955) | 0.17 in (2009) |
| June 20 | 88.0°F (2004) | 46.9°F (1960) | 0.81 in (1948) |
| June 21 | 88.0°F (2021) | 46.9°F (1960) | 0.28 in (1963) |
| June 22 | 95.0°F (1958) | 48.0°F (2003) | 0.36 in (2012) |
| June 23 | 84.9°F (1962) | 44.1°F (1952) | 0.66 in (2012) |
| June 24 | 87.1°F (2017) | 46.9°F (1954) | 0.71 in (1999) |
| June 25 | 93.0°F (2017) | 46.9°F (1949) | 0.10 in (2013) |
| June 26 | 99.0°F (2021) | 48.9°F (1949) | 0.56 in (2013) |
| June 27 | 98.1°F (2021) | 46.9°F (1949) | 0.32 in (2020) |
| June 28 | 104.0°F (2021) | 48.0°F (1949) | 0.22 in (1952) |
| June 29 | 93.0°F (1951) | 48.0°F (1949) | 0.30 in (1952) |
| June 30 | 93.0°F (1951) | 45.0°F (1949) | 0.35 in (1954) |