Weather & Climate in Cool Valley, MO
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Cool Valley enjoys a temperate climate with an average annual temperature of 57°F (14°C). Winters average 32°F in January while summers reach 80°F in July. Annual precipitation totals 41.7 inches. The area receives 16.6 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 548 feet.
Temperature
32°F Jan (0°C)
80°F Jul (27°C)
| Annual Average | 57.4°F |
| 6% above US avg | |
| January Average | 32°F (0°C) |
| July Average | 80°F (27°C) |
Geography
| Elevation | 548 ft (167 m) |
| Area | 0.5 sq mi (1.2 km²) |
| Population Density | 2,867/sq mi |
| Coordinates | 38.7259°N, 90.3059°W |
| Timezone | America/Chicago |
| Nearest Airport | St Louis Lambert International (STL) 4 miles away |
Precipitation & Snow
Air Quality
Earthquake History
37 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 | 89 km | 21 km |
| Mar 2, 1990 | 9 km NW of Vernon, Illinois | M3.4 | 99 km | 0 km |
| Aug 27, 1993 | 5 km SSE of Olympian Village, Missouri | M3.3 | 72 km | 22 km |
| Apr 6, 1994 | 2 km NE of Tamaroa, Illinois | M3.2 | 114 km | 15 km |
| Jan 29, 1993 | 7 km WNW of Brownstown, Illinois | M3.2 | 116 km | 5 km |
| Oct 24, 1990 | 5 km ENE of Woodlawn, Illinois | M3.2 | 124 km | 1 km |
| Dec 27, 1992 | 2 km E of Pocahontas, Missouri | M3.2 | 149 km | 10 km |
| Jul 1, 2017 | 9 km SSE of Mulberry Grove, Illinois | M3.1 | 95 km | 17 km |
| Feb 28, 1994 | 5 km NW of Harrison, Illinois | M3.0 | 128 km | 5 km |
| Jun 27, 2005 | 6 km E of Grand Tower, Illinois | M3.0 | 144 km | 10 km |
| Jul 8, 2003 | 1 km N of Leasburg, Missouri | M2.9 | 110 km | 4 km |
| May 18, 2006 | 9 km SSE of De Soto, Missouri | M2.9 | 77 km | 6 km |
| Sep 5, 1995 | 3 km N of Woodlawn, Illinois | M2.9 | 117 km | 4 km |
| Sep 5, 2004 | 3 km WNW of Saint Peter, Illinois | M2.9 | 124 km | 33 km |
| Apr 29, 2022 | 1 km SSW of Peerless Park, Missouri | M2.8 | 28 km | 8 km |
| Mar 28, 2024 | 1 km NNE of Germantown, Illinois | M2.8 | 69 km | 24 km |
| Aug 26, 1992 | 5 km W of Frohna, Missouri | M2.8 | 132 km | 2 km |
| May 5, 2008 | 3 km SSE of Fenton, Missouri | M2.8 | 28 km | 19 km |
| Sep 13, 1997 | 3 km SSE of Darmstadt, Illinois | M2.8 | 71 km | 16 km |
| Jul 31, 1995 | 8 km SSW of Caledonia, Missouri | M2.8 | 123 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
597 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 61 fatalities, 1,082 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Nov 17, 2013 | EF4 | 82 km | 10.6 mi | 2 |
| Apr 22, 2011 | EF4 | 16 km | 21.3 mi | 0 |
| Apr 3, 1981 | EF4 | 15 km | 11.9 mi | 0 |
| Jan 24, 1967 | EF4 | 22 km | 25.0 mi | 3 |
| Feb 10, 1959 | EF4 | 34 km | 23.9 mi | 21 |
| Feb 24, 1956 | EF4 | 62 km | 77.6 mi | 6 |
| Dec 10, 2021 | EF3 | 22 km | 4.2 mi | 6 |
| Dec 10, 2021 | EF3 | 54 km | 24.8 mi | 1 |
| May 31, 2013 | EF3 | 16 km | 10.6 mi | 0 |
| May 31, 2013 | EF3 | 39 km | 31.7 mi | 0 |
| Apr 19, 2011 | EF3 | 90 km | 4.3 mi | 0 |
| Dec 31, 2010 | EF3 | 30 km | 6.7 mi | 1 |
| Mar 13, 2006 | EF3 | 99 km | 44.5 mi | 0 |
| Mar 13, 2006 | EF3 | 89 km | 6.0 mi | 0 |
| Mar 11, 2006 | EF3 | 67 km | 5.1 mi | 0 |
| Jun 1, 1999 | EF3 | 86 km | 10.0 mi | 1 |
| Nov 15, 1988 | EF3 | 35 km | 1.0 mi | 0 |
| Nov 15, 1988 | EF3 | 29 km | 9.0 mi | 0 |
| Apr 29, 1984 | EF3 | 59 km | 8.0 mi | 0 |
| May 1, 1983 | EF3 | 17 km | 16.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
2 wildfires (100+ acres) recorded within 100 km. Largest: CICERO CREEK (1,846 acres, 2004).
| Year | Name | Acres Burned | Distance |
| 2004 | CICERO CREEK | 1,846 | 99 km |
| 2000 | UNNAMED | 549 | 100 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 32°F (0°C) | 2.6 in | Coldest |
| February | 37°F (3°C) | 2.2 in | Driest |
| March | 47°F (8°C) | 3.5 in | |
| April | 58°F (14°C) | 4.7 in | |
| May | 68°F (20°C) | 4.8 in | Wettest |
| June | 77°F (25°C) | 4.5 in | |
| July | 80°F (27°C) | 3.9 in | Warmest |
| August | 79°F (26°C) | 3.4 in | |
| September | 71°F (22°C) | 3.0 in | |
| October | 59°F (15°C) | 3.2 in | |
| November | 47°F (8°C) | 3.4 in | |
| December | 37°F (3°C) | 2.5 in |
Cool Valley has a seasonal temperature swing of 48°F / from 32°F in January to 80°F in July. Total annual precipitation is 41.7 inches, with May being the wettest month (4.8") and February the driest (2.2").