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Weather & Climate in Boston, IN
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Boston experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 28°F in January while summers reach 74°F in July. The area gets 293 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 42.9 inches. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 1,131 feet.
Temperature
28°F Jan (-2°C)
74°F Jul (23°C)
| Annual Average | 52.3°F |
| 3% below US avg | |
| January Average | 28°F (-2°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 1,131 ft (345 m) |
| Area | 0.1 sq mi (0.2 km²) |
| Population Density | 1,191/sq mi |
| Coordinates | 39.7412°N, 84.8518°W |
| Timezone | America/Indiana/Indianapolis |
| County | Union County County |
| Nearest Airport | Middletown Regional/Hook Field (MWO) 28 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 5.2 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 20.6 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Very Low |
| Winter Weather | Very Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Very Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
9 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.8.
| Sep 12, 2004 | 4 km NW of Manilla, Indiana | M3.8 | 71 km | 2 km |
| Feb 19, 1995 | 8 km SSE of Rocky Fork Point, Ohio | M3.6 | 137 km | 10 km |
| Apr 17, 1990 | 8 km NW of Fort Recovery, Ohio | M3.0 | 80 km | 5 km |
| Apr 4, 1994 | 2 km WNW of Minster, Ohio | M2.9 | 83 km | 5 km |
| May 12, 2006 | 2 km E of Lima, Ohio | M2.8 | 129 km | 5 km |
| Mar 17, 1999 | 2 km NNE of Ripley, Ohio | M2.8 | 140 km | 0 km |
| Jun 12, 2015 | 6 km NW of Convoy, Ohio | M2.6 | 135 km | 5 km |
| Jul 23, 2013 | 6 km NNE of Germantown, Kentucky | M2.6 | 139 km | 4 km |
| Jan 30, 2004 | 2 km S of Rockford, Ohio | M2.5 | 105 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
548 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 68 fatalities, 2,583 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 3, 1974 | EF5 | 86 km | 20.8 mi | 3 |
| Apr 3, 1974 | EF5 | 70 km | 31.3 mi | 36 |
| May 27, 2019 | EF4 | 35 km | 18.2 mi | 0 |
| Sep 20, 2000 | EF4 | 75 km | 9.0 mi | 1 |
| Apr 9, 1999 | EF4 | 70 km | 10.0 mi | 4 |
| Jun 11, 1998 | EF4 | 94 km | 13.2 mi | 0 |
| Jun 2, 1990 | EF4 | 58 km | 33.0 mi | 0 |
| Jul 9, 1980 | EF4 | 55 km | 11.0 mi | 2 |
| Apr 3, 1974 | EF4 | 70 km | 19.8 mi | 2 |
| Apr 3, 1974 | EF4 | 50 km | 18.0 mi | 1 |
| Apr 3, 1974 | EF4 | 68 km | 18.9 mi | 0 |
| Apr 23, 1968 | EF4 | 87 km | 24.1 mi | 1 |
| Apr 11, 1965 | EF4 | 79 km | 18.4 mi | 3 |
| Apr 25, 1961 | EF4 | 83 km | 63.1 mi | 0 |
| Mar 14, 2024 | EF3 | 54 km | 41.3 mi | 1 |
| May 27, 2019 | EF3 | 42 km | 10.5 mi | 0 |
| May 27, 2019 | EF3 | 91 km | 10.8 mi | 1 |
| May 27, 2019 | EF3 | 64 km | 9.9 mi | 0 |
| May 14, 2014 | EF3 | 86 km | 8.9 mi | 0 |
| Mar 2, 2012 | EF3 | 89 km | 8.7 mi | 3 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
13 wildfires (100+ acres) recorded within 100 km. Largest: WUI 3 03 (3,372 acres, 2003).
| Year | Name | Acres Burned | Distance |
| 2003 | WUI 3 03 | 3,372 | 99 km |
| 2010 | WUI UNIT 28K | 3,230 | 96 km |
| 1999 | UNNAMED | 3,122 | 100 km |
| 2005 | UNIT 3 05 | 2,511 | 100 km |
| 2010 | TRACER | 1,408 | 97 km |
| 1995 | UNNAMED | 1,019 | 97 km |
| 2008 | FY 09 UNIT 3 RX FALL 2008 | 949 | 100 km |
| 2004 | UNIT 30 | 938 | 94 km |
| 2002 | UNIT 1 | 707 | 96 km |
| 2004 | UNIT 1 | 669 | 97 km |
| 2005 | UNIT 31 05 | 649 | 98 km |
| 2007 | UNIT 2 07 WUI | 571 | 98 km |
| 2004 | UNIT 2 | 514 | 98 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 28°F (-2°C) | 2.4 in | Coldest, Driest |
| February | 29°F (-2°C) | 2.4 in | |
| March | 40°F (4°C) | 3.6 in | |
| April | 50°F (10°C) | 3.9 in | |
| May | 61°F (16°C) | 4.7 in | Wettest |
| June | 69°F (21°C) | 3.9 in | |
| July | 74°F (23°C) | 4.2 in | Warmest |
| August | 71°F (22°C) | 3.6 in | |
| September | 65°F (18°C) | 2.7 in | |
| October | 53°F (12°C) | 3.0 in | |
| November | 42°F (5°C) | 3.4 in | |
| December | 31°F (-0°C) | 3.2 in |
Boston has a seasonal temperature swing of 46°F / from 28°F in January to 74°F in July. Total annual precipitation is 40.9 inches, with May being the wettest month (4.7") and January the driest (2.4").