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Weather & Climate in St. Robert, MO
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
St. Robert enjoys a temperate climate with an average annual temperature of 56°F (13°C). Winters average 31°F in January while summers reach 78°F in July. The area gets 258 sunny days per year, above the national average. Annual precipitation totals 42.7 inches. The area receives 5.1 inches of snow annually. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 1,086 feet.
Temperature
31°F Jan (-1°C)
78°F Jul (25°C)
| Annual Average | 55.6°F |
| 3% above US avg | |
| January Average | 31°F (-1°C) |
| July Average | 78°F (25°C) |
| Sunny Days | 258 days/yr |
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
| AQI Median | 41.0 |
| Rating | Good |
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 | 31°F (-1°C) | 2.0 in | Coldest, Driest |
| February | 36°F (2°C) | 2.3 in | |
| March | 46°F (8°C) | 3.8 in | |
| April | 56°F (13°C) | 3.9 in | |
| May | 64°F (18°C) | 4.8 in | Wettest |
| June | 73°F (23°C) | 4.1 in | |
| July | 78°F (25°C) | 3.6 in | Warmest |
| August | 76°F (25°C) | 3.6 in | |
| September | 68°F (20°C) | 3.9 in | |
| October | 58°F (14°C) | 3.7 in | |
| November | 46°F (8°C) | 3.8 in | |
| December | 35°F (2°C) | 3.2 in |
St. Robert has a seasonal temperature swing of 47°F / from 31°F in January to 78°F in July. Total annual precipitation is 42.7 inches, with May being the wettest month (4.8") and January the driest (2.0").