New Boston, IL
Climate overview — based on NOAA 1991-2020 normals from NEW BOSTON DAM 17, IL US.
Year-round temperatures (°F)
Climate summary
New Boston has an annual average temperature of 51.2°F with about 36.3 inches of precipitation per year. The warmest month is July (average high 86.0°F), and the coldest is January (average low 15.3°F). May is typically the wettest month (5.05 in) and January the driest (1.31 in).
Best time to visit New Boston
Full guide →Climate change signal
All-time records →113 of 366 (30.9%) of New Boston's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1930s | 41 | |
| 1940s | 55 | |
| 1950s | 0 | |
| 1960s | 1 | |
| 1970s | 0 | |
| 1980s | 0 | |
| 1990s | 19 | |
| 2000s | 80 | |
| 2010s | 107 | |
| 2020s | 63 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 31.5°F | 15.3°F | 23.4°F | 1.31 in | — | 8 |
| February | 36.0°F | 19.0°F | 27.5°F | 1.72 in | — | 7 |
| March | 48.6°F | 29.6°F | 39.1°F | 2.62 in | — | 9 |
| April | 61.9°F | 40.4°F | 51.2°F | 3.56 in | — | 10 |
| May | 72.9°F | 51.8°F | 62.4°F | 5.05 in | — | 12 |
| June | 82.5°F | 61.9°F | 72.2°F | 4.59 in | — | 10 |
| July | 86.0°F | 65.3°F | 75.7°F | 3.52 in | — | 8 |
| August | 83.9°F | 62.9°F | 73.4°F | 3.83 in | — | 9 |
| September | 77.4°F | 54.5°F | 66.0°F | 3.34 in | — | 8 |
| October | 64.3°F | 43.3°F | 53.8°F | 2.86 in | — | 8 |
| November | 49.4°F | 31.9°F | 40.7°F | 2.13 in | — | 8 |
| December | 36.7°F | 21.8°F | 29.3°F | 1.77 in | — | 8 |
Climate twins of New Boston
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).