All Countries
Weather & Climate in Isabel, SD
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Isabel has a cool climate with an average annual temperature of 45°F (7°C). Winters average 17°F in January while summers reach 73°F in July. The area gets 311 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 19.4 inches (drier than the 38-inch national average). The area receives 41.2 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 35. The city sits at an elevation of 2,393 feet.
Temperature
17°F Jan (-8°C)
73°F Jul (23°C)
| Annual Average | 45.3°F |
| 16% below US avg | |
| January Average | 17°F (-8°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 311 days/yr |
Geography
| Elevation | 2,393 ft (729 m) |
| Area | 0.9 sq mi (2.4 km²) |
| Population Density | 214/sq mi |
| Coordinates | 45.3937°N, 101.4315°W |
| Timezone | America/Chicago |
| County | Corson County County |
| Nearest Airport | Pierre Regional (PIR) 90 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 35.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 38.1 / 100 |
| Social Vulnerability | 91.2 / 100 |
| Community Resilience | 2.9 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Moderate |
| Lightning | Very Low |
| Ice Storm | Relatively Low |
| Drought | Very Low |
| Cold Wave | Relatively High |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
3 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.7.
| May 30, 2024 | 38 km NNW of Pierre, South Dakota | M3.7 | 105 km | 15 km |
| Aug 9, 2011 | 2 km S of Fort Pierre, South Dakota | M3.3 | 145 km | 5 km |
| Aug 15, 2017 | 8 km E of Agar, South Dakota | M3.0 | 131 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
146 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 15 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 21, 1983 | EF3 | 23 km | 6.0 mi | 0 |
| Jun 20, 1968 | EF3 | 96 km | 8.8 mi | 0 |
| Aug 28, 2024 | EF2 | 98 km | 5.4 mi | 0 |
| Jun 2, 2024 | EF2 | 86 km | 4.1 mi | 0 |
| Jun 16, 2010 | EF2 | 38 km | 0.4 mi | 0 |
| Jun 16, 2010 | EF2 | 42 km | 1.4 mi | 0 |
| May 24, 2010 | EF2 | 57 km | 8.2 mi | 0 |
| May 24, 2010 | EF2 | 62 km | 22.9 mi | 0 |
| Jul 18, 1986 | EF2 | 64 km | 10.5 mi | 0 |
| May 25, 1972 | EF2 | 91 km | 2.0 mi | 0 |
| Jul 18, 1970 | EF2 | 94 km | 0.1 mi | 0 |
| Aug 12, 1969 | EF2 | 61 km | 6.1 mi | 0 |
| Jul 17, 1969 | EF2 | 82 km | 0.1 mi | 0 |
| Jul 7, 1969 | EF2 | 56 km | 0.1 mi | 0 |
| Jun 20, 1968 | EF2 | 72 km | 0.1 mi | 0 |
| Aug 1, 1964 | EF2 | 82 km | 0.8 mi | 0 |
| Jun 8, 1964 | EF2 | 67 km | 3.8 mi | 0 |
| Apr 19, 1955 | EF2 | 43 km | 0.1 mi | 0 |
| Jun 2, 1953 | EF2 | 47 km | 5.9 mi | 0 |
| May 29, 1953 | EF2 | 67 km | 0.5 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: TENBROOK (30,588 acres, 2002).
| Year | Name | Acres Burned | Distance |
| 2002 | TENBROOK | 30,588 | 84 km |
| 2021 | WINDY | 16,866 | 82 km |
| 2002 | LAPLANTE | 14,777 | 63 km |
| 1991 | UNNAMED | 14,487 | 59 km |
| 1999 | FAITH | 12,629 | 73 km |
| 2013 | PAUTRE | 11,733 | 95 km |
| 2021 | DIVIDE CA | 10,635 | 95 km |
| 2000 | GENO H. | 10,423 | 82 km |
| 2006 | STONE MAN CHURCH | 10,389 | 37 km |
| 2000 | TRIBLE | 9,718 | 87 km |
| 2006 | LUND | 9,425 | 93 km |
| 2000 | HOUCK RANCH | 8,746 | 94 km |
| 2006 | BLACK HORSE CREEK | 8,000 | 53 km |
| 1999 | BULLHEAD | 5,606 | 46 km |
| 2006 | KELLY | 5,071 | 69 km |
| 2022 | HWY31 AND 101ST WEST | 4,879 | 69 km |
| 2000 | JENSEN | 4,739 | 60 km |
| 2020 | BENT RIM | 3,665 | 57 km |
| 2006 | B WARD 1 | 3,325 | 30 km |
| 2005 | LITTLE BEND | 2,789 | 89 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 17°F (-8°C) | 0.3 in | Coldest, Driest |
| February | 21°F (-6°C) | 0.5 in | |
| March | 31°F (-1°C) | 1.1 in | |
| April | 44°F (7°C) | 2.1 in | |
| May | 56°F (14°C) | 3.0 in | |
| June | 66°F (19°C) | 3.2 in | Wettest |
| July | 73°F (23°C) | 2.2 in | Warmest |
| August | 71°F (22°C) | 1.8 in | |
| September | 61°F (16°C) | 1.3 in | |
| October | 48°F (9°C) | 1.1 in | |
| November | 31°F (-1°C) | 0.5 in | |
| December | 19°F (-7°C) | 0.4 in |
Isabel has a seasonal temperature swing of 56°F / from 17°F in January to 73°F in July. Total annual precipitation is 17.5 inches, with June being the wettest month (3.2") and January the driest (0.3").