May weather in Grain Valley, MO
The average temperature in Grain Valley in May is 65.3°F (55.9°F–74.8°F). Average precipitation: 5.70 inches.
May is a spring month in Grain Valley, and is warmer than the annual average of 55.7°F. Daily temperatures swing about 18.9°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 14h 8m. For travel, May is a wet month.
Avg High
74.8°F
Avg Low
55.9°F
Precipitation
5.70 in
Daylight
14h 8m
May records in Grain Valley
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 81.0°F (2013) | 37.9°F (2005) | 0.88 in (2012) |
| May 2 | 82.9°F (2018) | 30.0°F (2005) | 1.25 in (2024) |
| May 3 | 82.9°F (2012) | 33.1°F (2013) | 0.72 in (2017) |
| May 4 | 86.0°F (2014) | 33.1°F (2013) | 0.83 in (2020) |
| May 5 | 87.1°F (2012) | 39.0°F (2021) | 0.54 in (2011) |
| May 6 | 91.0°F (2023) | 42.1°F (2011) | 3.61 in (2007) |
| May 7 | 89.1°F (2023) | 42.1°F (2020) | 2.54 in (2007) |
| May 8 | 84.9°F (2011) | 42.1°F (2010) | 1.95 in (2003) |
| May 9 | 88.0°F (2022) | 37.9°F (2020) | 0.85 in (2021) |
| May 10 | 89.1°F (2011) | 37.9°F (2021) | 1.18 in (2010) |
| May 11 | 89.1°F (2022) | 39.0°F (2020) | 2.85 in (2002) |
| May 12 | 90.0°F (2022) | 37.0°F (2013) | 1.26 in (2019) |
| May 13 | 90.0°F (2018) | 42.1°F (2019) | 1.51 in (2010) |
| May 14 | 91.0°F (2013) | 42.1°F (2016) | 1.01 in (2023) |
| May 15 | 88.0°F (2017) | 39.9°F (2005) | 1.07 in (2009) |
| May 16 | 88.0°F (2019) | 33.1°F (2014) | 2.32 in (2021) |
| May 17 | 84.0°F (2008) | 39.0°F (2014) | 0.46 in (2015) |
| May 18 | 86.0°F (2018) | 42.1°F (2002) | 1.13 in (2019) |
| May 19 | 87.1°F (2005) | 44.1°F (2015) | 4.55 in (2004) |
| May 20 | 87.1°F (2004) | 44.1°F (2023) | 2.09 in (2019) |
| May 21 | 84.9°F (2014) | 45.0°F (2002) | 1.28 in (2019) |
| May 22 | 86.0°F (2010) | 45.0°F (2022) | 0.84 in (2008) |
| May 23 | 89.1°F (2018) | 45.0°F (2022) | 1.07 in (2015) |
| May 24 | 88.0°F (2006) | 46.9°F (2017) | 2.56 in (2002) |
| May 25 | 88.0°F (2010) | 48.0°F (2017) | 3.49 in (2018) |
| May 26 | 91.9°F (2018) | 50.0°F (2002) | 1.86 in (2016) |
| May 27 | 93.0°F (2018) | 46.9°F (2022) | 2.01 in (2013) |
| May 28 | 93.9°F (2018) | 50.0°F (2021) | 2.25 in (2020) |
| May 29 | 91.9°F (2018) | 46.0°F (2021) | 0.58 in (2015) |
| May 30 | 91.0°F (2003) | 46.9°F (2021) | 1.97 in (2007) |
| May 31 | 90.0°F (2018) | 51.1°F (2004) | 2.30 in (2022) |