May weather in St. Johns, AZ
The average temperature in St. Johns in May is 61.4°F (43.5°F–79.3°F). Average precipitation: 0.43 inches.
May is a spring month in St. Johns, and is warmer than the annual average of 54.1°F. Daily temperatures swing about 35.8°F between overnight low and afternoon high. Expect about 3 days with precipitation. Daylight averages about 13h 48m. For travel, May is a comfortable month to visit.
Avg High
79.3°F
Avg Low
43.5°F
Precipitation
0.43 in
Daylight
13h 48m
May records in St. Johns
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 87.1°F (2020) | 23.2°F (2011) | 0.29 in (2007) |
| May 2 | 87.1°F (2006) | 23.2°F (2008) | 0.32 in (2010) |
| May 3 | 84.9°F (2000) | 22.1°F (2011) | 0.00 in (2000) |
| May 4 | 89.1°F (2004) | 30.0°F (2001) | 0.18 in (2015) |
| May 5 | 88.0°F (2004) | 32.0°F (2022) | 0.27 in (2025) |
| May 6 | 91.0°F (2020) | 34.0°F (2007) | 0.10 in (2013) |
| May 7 | 90.0°F (2009) | 32.0°F (2007) | 0.01 in (2016) |
| May 8 | 90.0°F (2009) | 37.0°F (2012) | 0.17 in (2019) |
| May 9 | 93.0°F (2018) | 34.0°F (2015) | 0.11 in (2019) |
| May 10 | 90.0°F (2018) | 32.0°F (2003) | 0.51 in (2019) |
| May 11 | 89.1°F (2007) | 28.0°F (2003) | 0.39 in (2019) |
| May 12 | 91.0°F (2007) | 32.0°F (2010) | 0.01 in (2001) |
| May 13 | 91.9°F (2006) | 26.1°F (2000) | 0.40 in (2001) |
| May 14 | 93.9°F (2006) | 30.2°F (2014) | 0.04 in (2019) |
| May 15 | 91.9°F (2022) | 32.0°F (2014) | 0.02 in (2015) |
| May 16 | 89.1°F (2006) | 37.0°F (2018) | 0.35 in (2007) |
| May 17 | 91.9°F (2003) | 34.0°F (2015) | 0.04 in (2016) |
| May 18 | 93.0°F (2006) | 37.0°F (2011) | 0.47 in (2016) |
| May 19 | 93.0°F (2005) | 32.0°F (2011) | 0.35 in (2011) |
| May 20 | 99.0°F (2005) | 32.0°F (2017) | 0.08 in (2011) |
| May 21 | 98.1°F (2005) | 36.0°F (2017) | 0.10 in (2009) |
| May 22 | 99.0°F (2005) | 35.1°F (2008) | 0.64 in (2008) |
| May 23 | 98.1°F (2005) | 32.0°F (2021) | 0.11 in (2008) |
| May 24 | 93.9°F (2005) | 29.1°F (2019) | 0.08 in (2003) |
| May 25 | 93.9°F (2006) | 35.1°F (2021) | 0.03 in (2014) |
| May 26 | 93.0°F (2003) | 37.0°F (2019) | 0.03 in (2014) |
| May 27 | 96.1°F (2003) | 32.0°F (2012) | 0.00 in (1999) |
| May 28 | 95.0°F (2000) | 37.0°F (2019) | 0.01 in (1999) |
| May 29 | 97.0°F (2000) | 39.0°F (2012) | 0.00 in (1999) |
| May 30 | 95.0°F (2000) | 39.9°F (2010) | 0.00 in (1999) |
| May 31 | 96.1°F (2002) | 33.1°F (2011) | 0.01 in (2009) |