May weather in Washington, IL
The average temperature in Washington in May is °F (°F–°F). Average precipitation: 5.04 inches.
May is a spring month in Washington, and is cooler than the annual average of 0°F. Expect about 13 days with precipitation. Daylight averages about 14h 16m.
Avg High
°F
Avg Low
°F
Precipitation
5.04 in
Daylight
14h 16m
May records in Washington
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | — | — | 1.98 in (2019) |
| May 2 | — | — | 0.54 in (2010) |
| May 3 | — | — | 0.76 in (2024) |
| May 4 | — | — | 0.77 in (2013) |
| May 5 | — | — | 1.32 in (2003) |
| May 6 | — | — | 0.88 in (2022) |
| May 7 | — | — | 0.95 in (2023) |
| May 8 | — | — | 1.17 in (2023) |
| May 9 | — | — | 1.93 in (2021) |
| May 10 | — | — | 0.89 in (2016) |
| May 11 | — | — | 1.61 in (2003) |
| May 12 | — | — | 2.65 in (2002) |
| May 13 | — | — | 2.08 in (1999) |
| May 14 | — | — | 2.15 in (2009) |
| May 15 | — | — | 0.94 in (2020) |
| May 16 | — | — | 1.36 in (2009) |
| May 17 | — | — | 2.28 in (1999) |
| May 18 | — | — | 1.09 in (2020) |
| May 19 | — | — | 1.27 in (2004) |
| May 20 | — | — | 0.92 in (2017) |
| May 21 | — | — | 0.89 in (2013) |
| May 22 | — | — | 2.16 in (1999) |
| May 23 | — | — | 0.52 in (2019) |
| May 24 | — | — | 1.47 in (2008) |
| May 25 | — | — | 0.91 in (1998) |
| May 26 | — | — | 0.89 in (2020) |
| May 27 | — | — | 1.65 in (2000) |
| May 28 | — | — | 0.65 in (2000) |
| May 29 | — | — | 1.37 in (2019) |
| May 30 | — | — | 3.07 in (2018) |
| May 31 | — | — | 2.47 in (2008) |