May weather in Decatur, TN
The average temperature in Decatur in May is 66.4°F (53.8°F–79.0°F). Average precipitation: 4.60 inches.
May is a spring month in Decatur, and is warmer than the annual average of 58.4°F. Daily temperatures swing about 25.2°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 13h 52m. For travel, May is a comfortable month to visit.
Avg High
79.0°F
Avg Low
53.8°F
Precipitation
4.60 in
Daylight
13h 52m
May records in Decatur
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 87.1°F (2007) | 33.1°F (2008) | 1.08 in (2002) |
| May 2 | 88.0°F (2007) | 35.1°F (2005) | 0.72 in (2019) |
| May 3 | 90.0°F (2012) | 34.0°F (2005) | 2.70 in (2010) |
| May 4 | 84.9°F (2012) | 30.9°F (2004) | 1.36 in (2011) |
| May 5 | 86.0°F (2001) | 33.1°F (2004) | 2.93 in (2013) |
| May 6 | 89.1°F (2001) | 33.1°F (2011) | 3.62 in (2003) |
| May 7 | 87.1°F (2001) | 33.1°F (2020) | 2.34 in (2003) |
| May 8 | 87.1°F (2004) | 33.1°F (2020) | 0.92 in (2003) |
| May 9 | 88.0°F (2004) | 32.0°F (2020) | 3.41 in (2024) |
| May 10 | 89.1°F (2015) | 32.0°F (2020) | 1.48 in (2021) |
| May 11 | 88.0°F (2007) | 36.0°F (2020) | 0.90 in (2019) |
| May 12 | 89.1°F (2011) | 36.0°F (2020) | 1.14 in (2025) |
| May 13 | 89.1°F (2005) | 34.0°F (2013) | 1.28 in (2025) |
| May 14 | 90.0°F (2018) | 34.0°F (2013) | 3.67 in (2012) |
| May 15 | 91.0°F (2018) | 36.0°F (2016) | 1.63 in (2014) |
| May 16 | 88.0°F (1998) | 37.9°F (2016) | 1.00 in (2023) |
| May 17 | 88.0°F (2017) | 39.0°F (2014) | 0.74 in (2025) |
| May 18 | 88.0°F (2001) | 39.9°F (2009) | 0.79 in (2002) |
| May 19 | 88.0°F (2019) | 35.1°F (2002) | 2.86 in (2020) |
| May 20 | 90.0°F (2022) | 34.0°F (2002) | 1.37 in (2005) |
| May 21 | 90.0°F (1998) | 35.1°F (2002) | 1.44 in (2005) |
| May 22 | 90.0°F (2004) | 35.1°F (2002) | 0.68 in (1998) |
| May 23 | 89.1°F (2007) | 36.0°F (2002) | 0.43 in (2000) |
| May 24 | 90.0°F (2019) | 39.9°F (2002) | 1.71 in (2017) |
| May 25 | 91.9°F (2019) | 42.1°F (2013) | 0.84 in (2024) |
| May 26 | 91.9°F (2021) | 42.1°F (2013) | 0.72 in (2025) |
| May 27 | 91.9°F (2019) | 45.0°F (1999) | 1.31 in (2018) |
| May 28 | 91.0°F (2012) | 42.1°F (1999) | 0.60 in (2017) |
| May 29 | 91.9°F (2012) | 42.1°F (1999) | 1.65 in (2010) |
| May 30 | 91.9°F (2019) | 46.9°F (2003) | 0.58 in (2010) |
| May 31 | 93.0°F (2006) | 44.1°F (2021) | 1.17 in (2004) |