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Weather & Climate in Foster, IN
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Foster experiences four distinct seasons with an average annual temperature of 51°F (10°C). Winters average 24°F in January while summers reach 73°F in July. The area gets 275 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 40.1 inches. The area receives 23.3 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 629 feet.
Temperature
24°F Jan (-4°C)
73°F Jul (23°C)
| Annual Average | 50.8°F |
| 6% below US avg | |
| January Average | 24°F (-4°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 629 ft (192 m) |
| Area | 1.3 sq mi (3.3 km²) |
| Population Density | 99/sq mi |
| Coordinates | 40.1416°N, 87.4687°W |
| Timezone | America/Indiana/Indianapolis |
| County | Fountain County County |
| Nearest Airport | Vermilion Regional (DNV) 8 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 21.3 / 100 |
| Social Vulnerability | 28.1 / 100 |
| Community Resilience | 46.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Ice Storm | Very Low |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
11 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.8.
| Jun 17, 2021 | Illinois-Indiana border region | M3.8 | 38 km | 6 km |
| Nov 11, 1991 | 3 km W of Flat Rock, Illinois | M3.8 | 139 km | 0 km |
| Dec 20, 1990 | 5 km S of Stilesville, Indiana | M3.7 | 94 km | 5 km |
| Apr 14, 2000 | 4 km NW of Heritage Lake, Indiana | M3.6 | 75 km | 5 km |
| May 13, 2025 | 7 km SSW of Lerna, Illinois | M3.3 | 114 km | 10 km |
| Dec 17, 1990 | Illinois-Indiana border region | M3.2 | 37 km | 10 km |
| May 10, 2012 | 0 km NW of Emison, Indiana | M3.1 | 148 km | 11 km |
| Dec 16, 1996 | 3 km NNE of Terre Haute, Indiana | M3.1 | 72 km | 5 km |
| Apr 24, 1990 | 5 km SW of Newton, Illinois | M2.9 | 146 km | 18 km |
| May 10, 2012 | 1 km NNW of Emison, Indiana | M2.7 | 147 km | 9 km |
| Mar 15, 2025 | 6 km W of Dwight, Illinois | M2.6 | 137 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
605 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 85 fatalities, 1,674 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 26, 1994 | EF4 | 58 km | 14.0 mi | 3 |
| Mar 20, 1976 | EF4 | 54 km | 16.7 mi | 0 |
| Apr 3, 1974 | EF4 | 49 km | 108.7 mi | 18 |
| Apr 11, 1965 | EF4 | 58 km | 21.8 mi | 0 |
| Apr 11, 1965 | EF4 | 97 km | 48.0 mi | 25 |
| Apr 11, 1965 | EF4 | 53 km | 45.7 mi | 28 |
| Nov 17, 2013 | EF3 | 81 km | 18.7 mi | 0 |
| Nov 17, 2013 | EF3 | 60 km | 29.8 mi | 0 |
| Nov 17, 2013 | EF3 | 59 km | 37.9 mi | 0 |
| Apr 19, 1996 | EF3 | 67 km | 4.0 mi | 0 |
| Apr 19, 1996 | EF3 | 41 km | 2.0 mi | 1 |
| Nov 22, 1992 | EF3 | 67 km | 12.0 mi | 0 |
| Jun 2, 1980 | EF3 | 35 km | 18.1 mi | 1 |
| Jun 25, 1978 | EF3 | 53 km | 27.4 mi | 0 |
| Mar 12, 1976 | EF3 | 97 km | 38.5 mi | 1 |
| Aug 10, 1974 | EF3 | 90 km | 0.1 mi | 0 |
| Apr 3, 1974 | EF3 | 67 km | 5.9 mi | 1 |
| Apr 3, 1974 | EF3 | 55 km | 14.9 mi | 0 |
| Apr 3, 1974 | EF3 | 15 km | 25.9 mi | 0 |
| May 15, 1968 | EF3 | 57 km | 7.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
1 wildfire (100+ acres) recorded within 100 km. Largest: UNNAMED (1,602 acres, 2000).
| Year | Name | Acres Burned | Distance |
| 2000 | UNNAMED | 1,602 | 95 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-4°C) | 2.0 in | Coldest |
| February | 29°F (-2°C) | 1.9 in | Driest |
| March | 40°F (5°C) | 3.1 in | |
| April | 51°F (11°C) | 3.9 in | |
| May | 62°F (17°C) | 4.3 in | Wettest |
| June | 71°F (22°C) | 4.3 in | |
| July | 73°F (23°C) | 4.3 in | Warmest |
| August | 73°F (23°C) | 4.0 in | |
| September | 66°F (19°C) | 3.1 in | |
| October | 54°F (12°C) | 2.9 in | |
| November | 42°F (6°C) | 3.4 in | |
| December | 31°F (-1°C) | 2.8 in |
Foster has a seasonal temperature swing of 49°F / from 24°F in January to 73°F in July. Total annual precipitation is 40.1 inches, with May being the wettest month (4.3") and February the driest (1.9").