June weather in Johnstown, CO
The average temperature in Johnstown in June is 66.0°F (49.2°F–82.7°F). Average precipitation: 1.63 inches.
June is a summer month in Johnstown, and is warmer than the annual average of 48.7°F. Daily temperatures swing about 33.5°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 14h 50m. For travel, June is a comfortable month to visit.
Avg High
82.7°F
Avg Low
49.2°F
Precipitation
1.63 in
Daylight
14h 50m
June records in Johnstown
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| June 1 | 89.1°F (1998) | 37.0°F (2022) | 0.52 in (2022) |
| June 2 | 93.0°F (2020) | 37.0°F (2013) | 0.46 in (1991) |
| June 3 | 93.9°F (2006) | 39.9°F (2013) | 0.64 in (1993) |
| June 4 | 95.0°F (2006) | 39.0°F (1998) | 1.20 in (2023) |
| June 5 | 93.9°F (2012) | 36.0°F (1998) | 0.97 in (2023) |
| June 6 | 97.0°F (2018) | 34.0°F (1998) | 1.18 in (1997) |
| June 7 | 97.0°F (2000) | 39.9°F (2013) | 0.69 in (1993) |
| June 8 | 99.0°F (2004) | 34.0°F (2007) | 0.73 in (1992) |
| June 9 | 96.1°F (2018) | 34.0°F (2007) | 1.16 in (2011) |
| June 10 | 95.0°F (2012) | 35.1°F (2014) | 0.70 in (1999) |
| June 11 | 97.0°F (2018) | 37.9°F (2005) | 0.18 in (2005) |
| June 12 | 100.0°F (2022) | 39.9°F (2005) | 1.38 in (2015) |
| June 13 | 100.0°F (2024) | 39.0°F (2008) | 0.69 in (2025) |
| June 14 | 100.0°F (2022) | 39.9°F (2008) | 0.72 in (2024) |
| June 15 | 102.0°F (2006) | 39.9°F (2014) | 0.62 in (1996) |
| June 16 | 100.0°F (2021) | 41.0°F (2010) | 0.41 in (2023) |
| June 17 | 100.0°F (2021) | 42.1°F (2000) | 1.09 in (1993) |
| June 18 | 100.0°F (2021) | 43.0°F (2000) | 1.51 in (2003) |
| June 19 | 100.0°F (2012) | 43.0°F (1993) | 0.45 in (2003) |
| June 20 | 96.1°F (2015) | 43.0°F (2004) | 2.62 in (1994) |
| June 21 | 100.0°F (2025) | 44.1°F (2000) | 0.48 in (1996) |
| June 22 | 100.0°F (2016) | 37.9°F (2004) | 0.78 in (2019) |
| June 23 | 100.0°F (2012) | 37.9°F (2004) | 0.42 in (2009) |
| June 24 | 102.0°F (2012) | 39.9°F (2019) | 0.15 in (1997) |
| June 25 | 100.9°F (2007) | 41.0°F (1993) | 0.32 in (2021) |
| June 26 | 102.0°F (2012) | 46.0°F (1993) | 0.47 in (2009) |
| June 27 | 102.9°F (2012) | 48.0°F (2004) | 0.40 in (2020) |
| June 28 | 100.0°F (2018) | 48.0°F (2000) | 0.31 in (1995) |
| June 29 | 102.9°F (2018) | 42.1°F (2008) | 1.20 in (2013) |
| June 30 | 98.1°F (1990) | 44.1°F (2008) | 0.09 in (2017) |