August weather in New Boston, IL
The average temperature in New Boston in August is 73.4°F (62.9°F–83.9°F). Average precipitation: 3.83 inches.
August is a summer month in New Boston, and is warmer than the annual average of 51.2°F. Daily temperatures swing about 21°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 13h 39m. For travel, August is a comfortable month to visit.
Avg High
83.9°F
Avg Low
62.9°F
Precipitation
3.83 in
Daylight
13h 39m
August records in New Boston
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 99.0°F (2006) | 53.1°F (1997) | 1.50 in (1993) |
| August 2 | 98.1°F (1947) | 55.9°F (2019) | 0.85 in (1946) |
| August 3 | 100.9°F (1938) | 55.0°F (2021) | 1.37 in (1943) |
| August 4 | 97.0°F (2005) | 54.0°F (2017) | 1.12 in (2004) |
| August 5 | 98.1°F (1938) | 54.0°F (2017) | 1.45 in (2016) |
| August 6 | 97.0°F (1947) | 50.0°F (1997) | 2.48 in (1972) |
| August 7 | 93.0°F (2022) | 50.0°F (1997) | 2.10 in (1977) |
| August 8 | 98.1°F (1941) | 53.1°F (1997) | 2.20 in (1982) |
| August 9 | 99.0°F (1938) | 53.1°F (2017) | 3.55 in (1973) |
| August 10 | 98.1°F (2005) | 54.0°F (2017) | 1.85 in (1993) |
| August 11 | 98.1°F (1947) | 54.0°F (1945) | 1.05 in (1939) |
| August 12 | 93.9°F (1947) | 54.0°F (1942) | 2.59 in (2016) |
| August 13 | 96.1°F (2010) | 53.1°F (1941) | 1.60 in (2012) |
| August 14 | 95.0°F (1944) | 48.0°F (2004) | 1.70 in (1940) |
| August 15 | 95.0°F (2010) | 46.9°F (2004) | 1.39 in (2024) |
| August 16 | 93.9°F (2003) | 46.9°F (2004) | 2.11 in (1993) |
| August 17 | 96.1°F (2003) | 52.0°F (2013) | 7.47 in (1939) |
| August 18 | 95.0°F (1947) | 48.9°F (2012) | 1.11 in (1941) |
| August 19 | 99.0°F (1947) | 48.9°F (2012) | 1.65 in (2015) |
| August 20 | 96.1°F (1947) | 50.0°F (2012) | 2.04 in (2009) |
| August 21 | 95.0°F (2003) | 51.1°F (2012) | 1.52 in (1975) |
| August 22 | 98.1°F (1947) | 51.1°F (2012) | 2.30 in (1974) |
| August 23 | 99.0°F (1947) | 51.1°F (2013) | 2.00 in (2002) |
| August 24 | 100.0°F (1947) | 46.0°F (1942) | 1.30 in (2007) |
| August 25 | 102.9°F (2023) | 51.1°F (1946) | 0.86 in (2004) |
| August 26 | 96.1°F (2003) | 50.0°F (1945) | 2.15 in (1965) |
| August 27 | 98.1°F (2003) | 51.1°F (2015) | 2.41 in (2009) |
| August 28 | 96.1°F (2013) | 52.0°F (2025) | 1.50 in (1957) |
| August 29 | 95.0°F (2013) | 43.0°F (1997) | 4.80 in (2018) |
| August 30 | 96.1°F (1947) | 52.0°F (1938) | 4.33 in (1965) |
| August 31 | 100.0°F (2013) | 46.9°F (2009) | 1.98 in (1997) |