Weather & Climate in St. Robert, MO
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
St. Robert experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 32°F in January while summers reach 77°F in July. Annual precipitation totals 46.8 inches (wetter than the 38-inch national average). The area receives 10.2 inches of snow annually. The city sits at an elevation of 1,086 feet.
Temperature
32°F Jan (-0°C)
77°F Jul (25°C)
| Annual Average | 55.3°F |
| 2% above US avg | |
| January Average | 32°F (-0°C) |
| July Average | 77°F (25°C) |
Geography
| Elevation | 1,086 ft (331 m) |
| Area | 7.8 sq mi (20.3 km²) |
| Population Density | 633/sq mi |
| Coordinates | 37.8141°N, 92.1375°W |
| Timezone | America/Chicago |
| Nearest Airport | Waynesville-St Robert Regional Forney Field (TBN) 5 miles away |
Precipitation & Snow
Air Quality
Earthquake History
23 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.9.
| Jun 7, 2011 | 18 km NNW of Potosi, Missouri | M3.9 | 112 km | 21 km |
| Jul 7, 1991 | 11 km ENE of Brandsville, Missouri | M3.9 | 135 km | 8 km |
| Aug 16, 2003 | 5 km W of Thomasville, Missouri | M3.7 | 123 km | 0 km |
| Jul 31, 2005 | Missouri | M3.3 | 113 km | 5 km |
| Jan 21, 1992 | 5 km SE of Linn Creek, Missouri | M3.1 | 51 km | 5 km |
| Mar 30, 2001 | 1 km SW of Hermitage, Missouri | M3.1 | 105 km | 5 km |
| Mar 18, 1990 | 9 km W of Alton, Missouri | M3.0 | 137 km | 1 km |
| May 18, 2006 | 9 km SSE of De Soto, Missouri | M2.9 | 144 km | 6 km |
| Jul 8, 2003 | 1 km N of Leasburg, Missouri | M2.9 | 81 km | 4 km |
| Jul 31, 1995 | 8 km SSW of Caledonia, Missouri | M2.8 | 118 km | 5 km |
| May 14, 2007 | 12 km NE of Alton, Missouri | M2.7 | 136 km | 8 km |
| Oct 26, 1998 | 10 km NE of Van Buren, Missouri | M2.7 | 135 km | 4 km |
| Jul 15, 1990 | 7 km SW of Potosi, Missouri | M2.7 | 114 km | 3 km |
| Feb 14, 2019 | 11 km WSW of Mountain View, Missouri | M2.6 | 101 km | 7 km |
| Nov 25, 2013 | 8 km NE of Bonne Terre, Missouri | M2.6 | 146 km | 12 km |
| Mar 7, 2009 | 7 km S of Miramiguoa Park, Missouri | M2.6 | 101 km | 7 km |
| Feb 3, 2014 | 18 km NW of Potosi, Missouri | M2.6 | 109 km | 14 km |
| Sep 20, 1997 | 6 km NE of Ellington, Missouri | M2.6 | 122 km | 8 km |
| Jun 6, 2017 | 8 km ENE of Bonne Terre, Missouri | M2.6 | 147 km | 25 km |
| Sep 11, 2019 | 6 km NNE of Bonne Terre, Missouri | M2.6 | 143 km | 7 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
331 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 16 fatalities, 270 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 22, 1969 | EF4 | 92 km | 20.2 mi | 2 |
| Dec 21, 1967 | EF4 | 90 km | 27.9 mi | 3 |
| Sep 26, 1959 | EF4 | 70 km | 7.8 mi | 0 |
| Mar 25, 1954 | EF4 | 56 km | 12.1 mi | 2 |
| May 26, 2024 | EF3 | 94 km | 12.4 mi | 0 |
| May 22, 2019 | EF3 | 71 km | 32.7 mi | 0 |
| Dec 31, 2010 | EF3 | 15 km | 7.5 mi | 0 |
| Dec 31, 2010 | EF3 | 33 km | 11.0 mi | 2 |
| Jan 7, 2008 | EF3 | 12 km | 1.8 mi | 0 |
| Jan 7, 2008 | EF3 | 14 km | 4.7 mi | 0 |
| Mar 12, 2006 | EF3 | 90 km | 32.0 mi | 0 |
| May 4, 2003 | EF3 | 62 km | 14.0 mi | 4 |
| Jun 1, 1999 | EF3 | 45 km | 7.0 mi | 0 |
| May 1, 1983 | EF3 | 73 km | 9.0 mi | 0 |
| Apr 11, 1979 | EF3 | 88 km | 35.4 mi | 0 |
| May 21, 1957 | EF3 | 63 km | 10.2 mi | 0 |
| Apr 15, 2023 | EF2 | 40 km | 6.9 mi | 0 |
| Apr 13, 2018 | EF2 | 86 km | 9.0 mi | 0 |
| May 11, 2016 | EF2 | 89 km | 4.4 mi | 0 |
| Feb 28, 2012 | EF2 | 97 km | 9.5 mi | 1 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (7,388 acres, 1994).
| Year | Name | Acres Burned | Distance |
| 1994 | UNNAMED | 7,388 | 69 km |
| 1994 | UNNAMED | 5,344 | 58 km |
| 2006 | BIG SPRING FIRE | 4,921 | 70 km |
| 2011 | MINNINGHAW | 4,792 | 80 km |
| 2010 | UNNAMED | 4,767 | 68 km |
| 2017 | UNNAMED | 4,602 | 80 km |
| 2023 | ELM SPRINGS RX | 4,378 | 15 km |
| 2009 | MOUNTAIN CREEK | 4,322 | 59 km |
| 1991 | UNNAMED | 4,179 | 66 km |
| 2023 | CANNON RANGE RX | 3,870 | 23 km |
| 2021 | UNNAMED | 3,665 | 43 km |
| 1992 | UNNAMED | 3,538 | 70 km |
| 1991 | UNNAMED | 3,533 | 60 km |
| 1991 | UNNAMED | 3,492 | 71 km |
| 1994 | UNNAMED | 3,336 | 57 km |
| 2021 | KAINTUCK | 3,325 | 19 km |
| 2005 | UNNAMED | 3,252 | 81 km |
| 1991 | UNNAMED | 3,135 | 66 km |
| 2022 | LITTLE CREEK | 3,004 | 81 km |
| 2021 | HODGE HOLLOW | 2,922 | 76 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 32°F (-0°C) | 2.8 in | Coldest |
| February | 36°F (2°C) | 2.5 in | Driest |
| March | 45°F (7°C) | 4.2 in | |
| April | 55°F (13°C) | 4.9 in | |
| May | 64°F (18°C) | 5.1 in | Wettest |
| June | 73°F (23°C) | 4.6 in | |
| July | 77°F (25°C) | 4.2 in | Warmest |
| August | 76°F (24°C) | 4.2 in | |
| September | 68°F (20°C) | 3.9 in | |
| October | 57°F (14°C) | 3.4 in | |
| November | 45°F (7°C) | 3.9 in | |
| December | 36°F (2°C) | 3.2 in |
St. Robert has a seasonal temperature swing of 45°F / from 32°F in January to 77°F in July. Total annual precipitation is 46.8 inches, with May being the wettest month (5.1") and February the driest (2.5").