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Weather & Climate in Prospect, IN
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Prospect enjoys a temperate climate with an average annual temperature of 56°F (13°C). Winters average 32°F in January while summers reach 77°F in July. The area gets 290 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 50.0 inches (wetter than the 38-inch national average). The area receives 13.6 inches of snow annually. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 489 feet.
Temperature
32°F Jan (0°C)
77°F Jul (25°C)
| Annual Average | 55.6°F |
| 3% above US avg | |
| January Average | 32°F (0°C) |
| July Average | 77°F (25°C) |
| Sunny Days | 290 days/yr |
Geography
| Elevation | 489 ft (149 m) |
| Area | 0.9 sq mi (2.3 km²) |
| Population Density | 117/sq mi |
| Coordinates | 38.5867°N, 86.6164°W |
| Timezone | America/Indiana/Indianapolis |
| County | Orange County County |
| Nearest Airport | Lawrenceville-Vincennes International (LWV) 55 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 40.5 / 100 |
| Social Vulnerability | 52.0 / 100 |
| Community Resilience | 52.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
50 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.2.
| Apr 18, 2008 | 7 km NNE of Bellmont, Illinois | M5.2 | 112 km | 14 km |
| Apr 18, 2008 | 9 km NNE of Bellmont, Illinois | M4.7 | 110 km | 15 km |
| Jun 18, 2002 | 6 km SW of Parkers Settlement, Indiana | M4.6 | 119 km | 16 km |
| Apr 21, 2008 | 7 km NNE of Bellmont, Illinois | M4.0 | 111 km | 18 km |
| Jan 24, 1990 | 6 km WNW of Alton, Indiana | M3.9 | 51 km | 10 km |
| Dec 7, 2000 | 7 km W of Evansville, Indiana | M3.9 | 112 km | 5 km |
| Jun 17, 2021 | Illinois-Indiana border region | M3.8 | 150 km | 6 km |
| Nov 11, 1991 | 3 km W of Flat Rock, Illinois | M3.8 | 101 km | 0 km |
| Jan 27, 1990 | 6 km N of Alton, Indiana | M3.8 | 48 km | 5 km |
| Sep 12, 2004 | 4 km NW of Manilla, Indiana | M3.8 | 140 km | 2 km |
| Sep 19, 2017 | 4 km N of Bellmont, Illinois | M3.8 | 114 km | 12 km |
| Dec 20, 1990 | 5 km S of Stilesville, Indiana | M3.7 | 112 km | 5 km |
| Apr 25, 2008 | 8 km NNE of Bellmont, Illinois | M3.7 | 110 km | 13 km |
| Apr 14, 2000 | 4 km NW of Heritage Lake, Indiana | M3.6 | 131 km | 5 km |
| Nov 20, 2012 | 7 km N of Bellmont, Illinois | M3.6 | 113 km | 19 km |
| Jun 5, 2008 | 8 km WNW of Mount Carmel, Illinois | M3.4 | 108 km | 16 km |
| May 1, 2008 | 8 km NNE of Bellmont, Illinois | M3.3 | 109 km | 14 km |
| Dec 16, 1996 | 3 km NNE of Terre Haute, Indiana | M3.1 | 122 km | 5 km |
| Jul 18, 2008 | 6 km NNE of Bellmont, Illinois | M3.1 | 112 km | 18 km |
| May 10, 2012 | 0 km NW of Emison, Indiana | M3.1 | 77 km | 11 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
519 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 87 fatalities, 1,424 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 3, 1974 | EF5 | 96 km | 32.0 mi | 31 |
| Apr 3, 1974 | EF5 | 59 km | 68.0 mi | 6 |
| Mar 2, 2012 | EF4 | 41 km | 45.1 mi | 11 |
| May 28, 1996 | EF4 | 90 km | 30.0 mi | 0 |
| Jun 2, 1990 | EF4 | 41 km | 18.0 mi | 0 |
| Jun 2, 1990 | EF4 | 76 km | 13.0 mi | 6 |
| Jun 2, 1990 | EF4 | 23 km | 11.0 mi | 1 |
| Apr 3, 1974 | EF4 | 98 km | 35.6 mi | 4 |
| Apr 3, 1974 | EF4 | 75 km | 35.6 mi | 11 |
| Apr 3, 1974 | EF4 | 87 km | 18.5 mi | 3 |
| Mar 31, 2023 | EF3 | 80 km | 5.9 mi | 2 |
| May 25, 2011 | EF3 | 37 km | 6.8 mi | 0 |
| Mar 8, 2009 | EF3 | 29 km | 1.1 mi | 0 |
| Oct 18, 2007 | EF3 | 94 km | 4.8 mi | 0 |
| Nov 15, 2005 | EF3 | 46 km | 12.0 mi | 0 |
| May 30, 2004 | EF3 | 29 km | 15.0 mi | 1 |
| Sep 20, 2002 | EF3 | 72 km | 112.0 mi | 0 |
| Nov 22, 1992 | EF3 | 74 km | 5.3 mi | 0 |
| Nov 22, 1992 | EF3 | 91 km | 15.0 mi | 0 |
| Jul 30, 1992 | EF3 | 97 km | 7.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
14 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (1,547 acres, 2021).
| Year | Name | Acres Burned | Distance |
| 2021 | UNNAMED | 1,547 | 67 km |
| 2017 | UNNAMED | 1,336 | 60 km |
| 2007 | UNNAMED | 1,102 | 95 km |
| 2019 | UNNAMED | 1,057 | 60 km |
| 2021 | UNNAMED | 959 | 58 km |
| 2014 | UNNAMED | 910 | 51 km |
| 2016 | UNNAMED | 898 | 67 km |
| 2019 | UNNAMED | 892 | 51 km |
| 2024 | LONG RUN RX | 774 | 59 km |
| 2010 | FORK RIDGE RX | 697 | 58 km |
| 2010 | RICEVILLE RX | 671 | 30 km |
| 2019 | UNNAMED | 670 | 58 km |
| 2019 | UNNAMED | 584 | 59 km |
| 2010 | ROCKHOUSE HOLLOW RX | 581 | 59 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 32°F (0°C) | 3.0 in | Coldest |
| February | 34°F (1°C) | 2.9 in | Driest |
| March | 44°F (7°C) | 4.4 in | |
| April | 54°F (12°C) | 4.5 in | |
| May | 63°F (17°C) | 5.0 in | Wettest |
| June | 71°F (22°C) | 4.0 in | |
| July | 77°F (25°C) | 4.7 in | Warmest |
| August | 74°F (23°C) | 3.9 in | |
| September | 67°F (20°C) | 3.3 in | |
| October | 56°F (13°C) | 3.2 in | |
| November | 45°F (7°C) | 4.2 in | |
| December | 35°F (1°C) | 3.5 in |
Prospect has a seasonal temperature swing of 45°F / from 32°F in January to 77°F in July. Total annual precipitation is 46.5 inches, with May being the wettest month (5.0") and February the driest (2.9").