May weather in Westport, SD
The average temperature in Westport in May is °F (°F–°F). Average precipitation: 3.29 inches.
May is a spring month in Westport, and is cooler than the annual average of 0°F. Expect about 9 days with precipitation. Daylight averages about 14h 43m.
Avg High
°F
Avg Low
°F
Precipitation
3.29 in
Daylight
14h 43m
May records in Westport
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | — | — | 0.73 in (2022) |
| May 2 | — | — | 0.50 in (1996) |
| May 3 | — | — | 1.20 in (1991) |
| May 4 | — | — | 0.65 in (2007) |
| May 5 | — | — | 2.41 in (2020) |
| May 6 | — | — | 4.54 in (2007) |
| May 7 | — | — | 2.86 in (2023) |
| May 8 | — | — | 1.50 in (1995) |
| May 9 | — | — | 1.50 in (1995) |
| May 10 | — | — | 0.32 in (2016) |
| May 11 | — | — | 2.13 in (2015) |
| May 12 | — | — | 0.37 in (2014) |
| May 13 | — | — | 1.00 in (1990) |
| May 14 | — | — | 0.50 in (1996) |
| May 15 | — | — | 1.66 in (1991) |
| May 16 | — | — | 0.58 in (2025) |
| May 17 | — | — | 2.30 in (1996) |
| May 18 | — | — | 1.56 in (2019) |
| May 19 | — | — | 1.08 in (2013) |
| May 20 | — | — | 1.38 in (2025) |
| May 21 | — | — | 1.28 in (2013) |
| May 22 | — | — | 2.00 in (1992) |
| May 23 | — | — | 1.00 in (1993) |
| May 24 | — | — | 0.75 in (2024) |
| May 25 | — | — | 0.93 in (2006) |
| May 26 | — | — | 0.30 in (2007) |
| May 27 | — | — | 0.52 in (2012) |
| May 28 | — | — | 0.95 in (2011) |
| May 29 | — | — | 0.67 in (2022) |
| May 30 | — | — | 0.81 in (2010) |
| May 31 | — | — | 2.34 in (2007) |