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Weather & Climate in Deerfield, MO
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Deerfield enjoys a temperate climate with an average annual temperature of 56°F (13°C). Winters average 30°F in January while summers reach 79°F in July. The area gets 258 sunny days per year, above the national average. Annual precipitation totals 42.8 inches. The area receives 3.5 inches of snow annually. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 797 feet.
Temperature
30°F Jan (-1°C)
79°F Jul (26°C)
| Annual Average | 56.2°F |
| 4% above US avg | |
| January Average | 30°F (-1°C) |
| July Average | 79°F (26°C) |
| Sunny Days | 258 days/yr |
Geography
| Elevation | 797 ft (243 m) |
| Area | 0.1 sq mi (0.3 km²) |
| Population Density | 390/sq mi |
| Coordinates | 37.8384°N, 94.5080°W |
| Timezone | America/Chicago |
| Nearest Airport | Joplin Regional (JLN) 44 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Earthquake History
4 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.3.
| May 18, 2005 | Missouri | M3.3 | 84 km | 5 km |
| Mar 30, 2001 | 1 km SW of Hermitage, Missouri | M3.1 | 104 km | 5 km |
| May 13, 1999 | 6 km WSW of Kansas City, Kansas | M3.0 | 141 km | 5 km |
| Apr 4, 2015 | 3 km ESE of Clinton, Missouri | M2.6 | 89 km | 2 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
482 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 189 fatalities, 1,521 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 22, 2011 | EF5 | 88 km | 21.6 mi | 158 |
| Feb 28, 2007 | EF4 | 61 km | 28.0 mi | 0 |
| May 4, 2003 | EF4 | 70 km | 33.0 mi | 4 |
| Apr 12, 1964 | EF4 | 76 km | 19.4 mi | 3 |
| May 22, 2019 | EF3 | 64 km | 11.3 mi | 3 |
| May 22, 2019 | EF3 | 82 km | 9.2 mi | 0 |
| Mar 12, 2006 | EF3 | 95 km | 17.0 mi | 0 |
| Apr 21, 2005 | EF3 | 88 km | 5.0 mi | 0 |
| May 4, 2003 | EF3 | 30 km | 86.0 mi | 5 |
| May 4, 2003 | EF3 | 93 km | 25.0 mi | 5 |
| May 4, 1999 | EF3 | 53 km | 3.0 mi | 0 |
| May 17, 1995 | EF3 | 4 km | 14.0 mi | 0 |
| Mar 26, 1983 | EF3 | 49 km | 7.0 mi | 0 |
| Mar 15, 1982 | EF3 | 86 km | 14.0 mi | 0 |
| Mar 15, 1982 | EF3 | 43 km | 70.0 mi | 2 |
| Mar 15, 1982 | EF3 | 59 km | 9.0 mi | 0 |
| May 4, 1977 | EF3 | 66 km | 29.8 mi | 2 |
| Mar 26, 1976 | EF3 | 94 km | 29.1 mi | 1 |
| Apr 20, 1973 | EF3 | 69 km | 1.0 mi | 0 |
| Apr 20, 1973 | EF3 | 70 km | 7.8 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
19 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (2,089 acres, 2006).
| Year | Name | Acres Burned | Distance |
| 2006 | UNNAMED | 2,089 | 83 km |
| 1991 | UNNAMED | 2,043 | 30 km |
| 2005 | NR STEELE | 1,652 | 45 km |
| 1988 | UNNAMED | 1,539 | 52 km |
| 1996 | UNNAMED | 1,356 | 66 km |
| 1996 | UNNAMED | 1,346 | 46 km |
| 1996 | UNNAMED | 1,305 | 62 km |
| 2006 | UNNAMED | 1,282 | 99 km |
| 2006 | GRAND | 1,067 | 51 km |
| 1984 | RESIDENT | 1,048 | 96 km |
| 2005 | UNNAMED | 860 | 60 km |
| 2000 | UNNAMED | 802 | 45 km |
| 2009 | REYNOLDS HOLLOW | 728 | 87 km |
| 2006 | SALT CREEK MARSH | 720 | 66 km |
| 1996 | UNNAMED | 636 | 67 km |
| 2012 | FANCY FENCE | 626 | 98 km |
| 1996 | UNNAMED | 624 | 62 km |
| 2012 | WALNUT GROVE | 540 | 97 km |
| 1996 | UNNAMED | 515 | 63 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 1.5 in | Coldest, Driest |
| February | 36°F (2°C) | 1.7 in | |
| March | 46°F (8°C) | 3.4 in | |
| April | 56°F (14°C) | 4.0 in | |
| May | 65°F (19°C) | 5.0 in | |
| June | 74°F (23°C) | 5.6 in | Wettest |
| July | 79°F (26°C) | 3.7 in | Warmest |
| August | 78°F (26°C) | 3.9 in | |
| September | 70°F (21°C) | 4.8 in | |
| October | 58°F (15°C) | 4.1 in | |
| November | 45°F (7°C) | 3.2 in | |
| December | 35°F (2°C) | 2.0 in |
Deerfield has a seasonal temperature swing of 49°F / from 30°F in January to 79°F in July. Total annual precipitation is 42.8 inches, with June being the wettest month (5.6") and January the driest (1.5").