May weather in New Boston, IL
The average temperature in New Boston in May is 62.4°F (51.8°F–72.9°F). Average precipitation: 5.05 inches.
May is a spring month in New Boston, and is warmer than the annual average of 51.2°F. Daily temperatures swing about 21.1°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 14h 18m. For travel, May is a wet month.
Avg High
72.9°F
Avg Low
51.8°F
Precipitation
5.05 in
Daylight
14h 18m
May records in New Boston
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 87.1°F (2007) | 35.1°F (1940) | 5.04 in (2003) |
| May 2 | 84.9°F (2013) | 37.9°F (1940) | 1.20 in (1973) |
| May 3 | 88.0°F (1938) | 28.0°F (2005) | 1.76 in (1942) |
| May 4 | 82.9°F (1938) | 28.0°F (2002) | 2.55 in (2012) |
| May 5 | 86.0°F (1943) | 30.0°F (2011) | 1.58 in (2003) |
| May 6 | 82.9°F (2012) | 33.1°F (1944) | 1.50 in (1976) |
| May 7 | 89.1°F (2004) | 37.9°F (1947) | 1.13 in (2012) |
| May 8 | 87.1°F (2023) | 37.0°F (1947) | 2.19 in (1995) |
| May 9 | 84.9°F (2004) | 30.9°F (1945) | 2.34 in (2021) |
| May 10 | 87.1°F (2011) | 28.0°F (1947) | 3.81 in (1951) |
| May 11 | 90.0°F (2011) | 37.0°F (1946) | 1.85 in (2008) |
| May 12 | 93.9°F (2022) | 34.0°F (1938) | 2.04 in (2002) |
| May 13 | 91.9°F (2022) | 35.1°F (1938) | 1.70 in (2010) |
| May 14 | 93.0°F (2022) | 37.9°F (1945) | 1.55 in (2024) |
| May 15 | 93.0°F (2022) | 37.9°F (1945) | 1.36 in (2020) |
| May 16 | 90.0°F (2013) | 32.0°F (2005) | 2.16 in (2009) |
| May 17 | 89.1°F (2001) | 36.0°F (1997) | 2.40 in (1996) |
| May 18 | 88.0°F (1939) | 39.9°F (1945) | 1.60 in (1942) |
| May 19 | 89.1°F (1939) | 43.0°F (2015) | 0.88 in (1959) |
| May 20 | 91.0°F (2024) | 39.0°F (2002) | 1.73 in (2025) |
| May 21 | 91.9°F (2024) | 36.0°F (2002) | 2.27 in (1982) |
| May 22 | 98.1°F (1939) | 42.1°F (2015) | 0.98 in (1949) |
| May 23 | 98.1°F (1939) | 46.9°F (1997) | 0.98 in (1993) |
| May 24 | 111.0°F (1939) | 39.9°F (1948) | 1.78 in (1995) |
| May 25 | 91.9°F (1939) | 39.9°F (2001) | 2.10 in (2015) |
| May 26 | 93.9°F (2010) | 45.0°F (1948) | 1.15 in (2019) |
| May 27 | 95.0°F (2018) | 45.0°F (1997) | 2.55 in (2013) |
| May 28 | 91.9°F (2010) | 41.0°F (1947) | 1.62 in (1996) |
| May 29 | 96.1°F (2018) | 36.0°F (1947) | 3.12 in (2019) |
| May 30 | 93.0°F (2006) | 42.1°F (2001) | 1.71 in (1976) |
| May 31 | 91.9°F (1939) | 42.1°F (2001) | 3.48 in (2000) |