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Weather & Climate in St. Peters, MO
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
St. Peters has a warm climate with an average annual temperature of 73°F (23°C). Winters average 61°F in January while summers reach 83°F in July. The area gets 246 sunny days per year, above the national average. Annual precipitation totals 49.7 inches (wetter than the 38-inch national average). Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 52 feet.
Temperature
61°F Jan (16°C)
83°F Jul (28°C)
| Annual Average | 73.0°F |
| 35% above US avg | |
| January Average | 61°F (16°C) |
| July Average | 83°F (28°C) |
| Sunny Days | 246 days/yr |
Geography
| Elevation | 52 ft (16 m) |
| Area | 22.4 sq mi (57.9 km²) |
| Population Density | 2,586/sq mi |
| Coordinates | 27.7709°N, 82.6793°W |
| Timezone | America/Chicago |
| Nearest Airport | St Pete-Clearwater International (PIE) 10 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Hurricane History
22 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 5.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Milton | Category 4 | 132 mph | 42 km |
| 2024 | Helene | Category 4 | 138 mph | 189 km |
| 2024 | Debby | Category 1 | 81 mph | 150 km |
| 2023 | Idalia | Category 4 | 132 mph | 188 km |
| 2022 | Ian | Category 5 | 161 mph | 116 km |
| 2022 | Nicole | Category 1 | 75 mph | 235 km |
| 2021 | Elsa | Category 1 | 75 mph | 140 km |
| 2020 | Eta | Category 1 | 75 mph | 250 km |
| 2017 | Irma | Category 3 | 115 mph | 67 km |
| 2016 | Matthew | Category 3 | 127 mph | 265 km |
| 2016 | Hermine | Category 1 | 81 mph | 248 km |
| 2005 | Dennis | Category 4 | 127 mph | 296 km |
| 2005 | Wilma | Category 3 | 121 mph | 230 km |
| 2005 | Katrina | Category 1 | 86 mph | 296 km |
| 2004 | Charley | Category 4 | 150 mph | 103 km |
| 2004 | Jeanne | Category 3 | 121 mph | 72 km |
| 2004 | Frances | Category 2 | 104 mph | 147 km |
| 2000 | Gordon | Category 1 | 81 mph | 113 km |
| 1999 | Irene | Category 1 | 81 mph | 254 km |
| 1995 | Erin | Category 1 | 86 mph | 225 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
728 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 24 fatalities, 1,049 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 4, 1966 | EF4 | 20 km | 135.8 mi | 11 |
| Apr 15, 1958 | EF4 | 13 km | 0.1 mi | 0 |
| Oct 3, 1992 | EF3 | 7 km | 2.6 mi | 3 |
| Mar 17, 1985 | EF3 | 79 km | 3.0 mi | 2 |
| Jan 24, 1979 | EF3 | 36 km | 7.0 mi | 0 |
| May 4, 1978 | EF3 | 17 km | 1.5 mi | 3 |
| Oct 31, 1958 | EF3 | 27 km | 3.6 mi | 0 |
| Oct 11, 2023 | EF2 | 30 km | 5.0 mi | 0 |
| Dec 16, 2020 | EF2 | 13 km | 13.1 mi | 0 |
| Oct 18, 2019 | EF2 | 66 km | 11.5 mi | 0 |
| Sep 10, 2017 | EF2 | 89 km | 0.6 mi | 0 |
| Jan 17, 2016 | EF2 | 52 km | 9.2 mi | 2 |
| Jan 17, 2016 | EF2 | 59 km | 1.2 mi | 0 |
| Dec 25, 2006 | EF2 | 69 km | 0.8 mi | 0 |
| Dec 7, 1996 | EF2 | 38 km | 2.0 mi | 1 |
| Oct 3, 1992 | EF2 | 17 km | 3.0 mi | 1 |
| Jul 12, 1992 | EF2 | 29 km | 4.5 mi | 0 |
| Feb 8, 1986 | EF2 | 84 km | 2.0 mi | 0 |
| Dec 11, 1983 | EF2 | 1 km | 8.0 mi | 0 |
| Feb 2, 1983 | EF2 | 51 km | 4.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (7,415 acres, 1999).
| Year | Name | Acres Burned | Distance |
| 1999 | UNNAMED | 7,415 | 78 km |
| 1995 | UNNAMED | 5,474 | 89 km |
| 1999 | UNNAMED | 4,949 | 76 km |
| 1994 | UNNAMED | 4,477 | 73 km |
| 2004 | UNNAMED | 3,999 | 74 km |
| 1992 | UNNAMED | 3,905 | 77 km |
| 2003 | UNNAMED | 3,890 | 78 km |
| 1992 | UNNAMED | 3,836 | 71 km |
| 1989 | UNNAMED | 3,828 | 77 km |
| 1985 | UNNAMED | 3,744 | 77 km |
| 1995 | UNNAMED | 3,726 | 92 km |
| 1985 | UNNAMED | 3,647 | 80 km |
| 1990 | UNNAMED | 3,595 | 71 km |
| 2012 | UNNAMED | 3,443 | 58 km |
| 2006 | UNNAMED | 3,436 | 90 km |
| 2017 | RAINTREE BLVD | 3,319 | 99 km |
| 1990 | UNNAMED | 3,245 | 76 km |
| 1990 | UNNAMED | 3,152 | 72 km |
| 1992 | UNNAMED | 3,132 | 49 km |
| 1992 | UNNAMED | 3,058 | 91 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 61°F (16°C) | 2.5 in | Coldest |
| February | 62°F (17°C) | 3.2 in | |
| March | 67°F (20°C) | 3.6 in | |
| April | 72°F (22°C) | 1.5 in | Driest |
| May | 77°F (25°C) | 3.1 in | |
| June | 82°F (28°C) | 6.3 in | |
| July | 83°F (28°C) | 6.9 in | Warmest |
| August | 83°F (28°C) | 8.5 in | Wettest |
| September | 81°F (27°C) | 7.1 in | |
| October | 76°F (24°C) | 2.5 in | |
| November | 69°F (21°C) | 2.2 in | |
| December | 63°F (17°C) | 2.5 in |
St. Peters has a seasonal temperature swing of 22°F / from 61°F in January to 83°F in July. Total annual precipitation is 49.7 inches, with August being the wettest month (8.5") and April the driest (1.5").