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Weather & Climate in St. Peter, MN
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
St. Peter has a cool climate with an average annual temperature of 44°F (7°C). Winters average 13°F in January while summers reach 72°F in July. The area gets 270 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 32.4 inches. The area receives 37.9 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 36. The city sits at an elevation of 891 feet.
Temperature
13°F Jan (-11°C)
72°F Jul (22°C)
| Annual Average | 43.9°F |
| 19% below US avg | |
| January Average | 13°F (-11°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 270 days/yr |
Geography
| Elevation | 891 ft (272 m) |
| Area | 6.1 sq mi (15.7 km²) |
| Population Density | 1,991/sq mi |
| Coordinates | 44.3293°N, 93.9677°W |
| Timezone | America/Chicago |
| County | Le Sueur County County |
| Nearest Airport | Mankato Regional (MKT) 8 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 36.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 22.8 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 96.6 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
2 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.1.
| Feb 9, 1994 | 6 km NNE of Blomkest, Minnesota | M3.1 | 111 km | 5 km |
| Apr 25, 2017 | Near Mankato, Minnesota | M2.8 | 16 km | 0 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
555 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 46 fatalities, 1,164 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 17, 2010 | EF4 | 88 km | 16.9 mi | 1 |
| Apr 30, 1967 | EF4 | 69 km | 20.1 mi | 6 |
| Apr 30, 1967 | EF4 | 95 km | 38.7 mi | 5 |
| May 6, 1965 | EF4 | 86 km | 17.3 mi | 6 |
| May 6, 1965 | EF4 | 68 km | 6.9 mi | 0 |
| May 6, 1965 | EF4 | 53 km | 12.3 mi | 3 |
| May 6, 1965 | EF4 | 95 km | 6.8 mi | 3 |
| Jun 19, 1951 | EF4 | 69 km | 52.6 mi | 1 |
| Jun 17, 2010 | EF3 | 85 km | 4.3 mi | 0 |
| Jun 17, 2010 | EF3 | 86 km | 5.0 mi | 0 |
| Jun 17, 2010 | EF3 | 82 km | 18.2 mi | 0 |
| Aug 24, 2006 | EF3 | 25 km | 33.0 mi | 1 |
| Aug 1, 2006 | EF3 | 77 km | 1.5 mi | 0 |
| Mar 29, 1998 | EF3 | 17 km | 12.0 mi | 1 |
| Mar 29, 1998 | EF3 | 1 km | 6.0 mi | 0 |
| Jul 1, 1997 | EF3 | 88 km | 5.0 mi | 0 |
| Jun 16, 1992 | EF3 | 80 km | 10.0 mi | 0 |
| Jul 23, 1987 | EF3 | 99 km | 5.0 mi | 0 |
| Jun 7, 1984 | EF3 | 88 km | 14.0 mi | 0 |
| Apr 26, 1984 | EF3 | 96 km | 5.5 mi | 1 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
6 wildfires (100+ acres) recorded within 100 km. Largest: SNAKE TRAIL (1,496 acres, 2024).
| Year | Name | Acres Burned | Distance |
| 2024 | SNAKE TRAIL | 1,496 | 49 km |
| 2004 | EAGAN | 925 | 83 km |
| 1990 | UNNAMED | 598 | 49 km |
| 2024 | LINCOLN WPA RX | 575 | 42 km |
| 1995 | LV 68 CARVER | 532 | 53 km |
| 1990 | UNNAMED | 513 | 76 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 13°F (-11°C) | 0.8 in | Coldest |
| February | 19°F (-7°C) | 0.6 in | Driest |
| March | 31°F (-0°C) | 1.8 in | |
| April | 46°F (8°C) | 2.5 in | |
| May | 59°F (15°C) | 3.5 in | |
| June | 68°F (20°C) | 4.5 in | Wettest |
| July | 72°F (22°C) | 4.1 in | Warmest |
| August | 70°F (21°C) | 4.0 in | |
| September | 61°F (16°C) | 2.9 in | |
| October | 49°F (9°C) | 2.3 in | |
| November | 32°F (0°C) | 1.7 in | |
| December | 18°F (-8°C) | 0.9 in |
St. Peter has a seasonal temperature swing of 59°F / from 13°F in January to 72°F in July. Total annual precipitation is 29.8 inches, with June being the wettest month (4.5") and February the driest (0.6").