Weather & Climate in Gilliam, MO
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Gilliam experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 28°F in January while summers reach 77°F in July. Annual precipitation totals 41.7 inches. The area receives 8.1 inches of snow annually. The city sits at an elevation of 833 feet.
Temperature
28°F Jan (-2°C)
77°F Jul (25°C)
| Annual Average | 54.0°F |
| 0% below US avg | |
| January Average | 28°F (-2°C) |
| July Average | 77°F (25°C) |
Geography
| Elevation | 833 ft (254 m) |
| Area | 0.3 sq mi (0.6 km²) |
| Population Density | 828/sq mi |
| Coordinates | 39.2334°N, 93.0046°W |
| Timezone | America/Chicago |
| Nearest Airport | Sedalia Regional (DMO) 37 miles away |
Precipitation & Snow
Air Quality
Earthquake History
8 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.3.
| May 18, 2005 | Missouri | M3.3 | 120 km | 5 km |
| Jul 31, 2005 | Missouri | M3.3 | 62 km | 5 km |
| Mar 30, 2001 | 1 km SW of Hermitage, Missouri | M3.1 | 147 km | 5 km |
| Jan 21, 1992 | 5 km SE of Linn Creek, Missouri | M3.1 | 140 km | 5 km |
| May 13, 1999 | 6 km WSW of Kansas City, Kansas | M3.0 | 147 km | 5 km |
| Feb 8, 2004 | 6 km SSW of Stoutsville, Missouri | M2.9 | 101 km | 5 km |
| Apr 4, 2015 | 3 km ESE of Clinton, Missouri | M2.6 | 116 km | 2 km |
| Jul 15, 2025 | 3 km W of Hale, Missouri | M2.5 | 52 km | 8 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
371 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 14 fatalities, 224 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Mar 12, 2006 | EF4 | 75 km | 29.0 mi | 0 |
| May 4, 1977 | EF4 | 86 km | 48.6 mi | 0 |
| Apr 23, 1975 | EF4 | 57 km | 28.2 mi | 1 |
| Apr 23, 1975 | EF4 | 98 km | 11.4 mi | 1 |
| Apr 20, 1973 | EF4 | 90 km | 3.8 mi | 1 |
| Apr 19, 1973 | EF4 | 91 km | 10.0 mi | 0 |
| Jun 12, 1970 | EF4 | 37 km | 16.1 mi | 0 |
| Apr 21, 1967 | EF4 | 54 km | 59.0 mi | 0 |
| Mar 12, 2006 | EF3 | 46 km | 19.7 mi | 4 |
| Mar 12, 2006 | EF3 | 26 km | 35.0 mi | 0 |
| Nov 10, 1998 | EF3 | 66 km | 2.0 mi | 0 |
| Jul 4, 1995 | EF3 | 53 km | 26.0 mi | 0 |
| Nov 27, 1990 | EF3 | 66 km | 12.0 mi | 0 |
| Nov 27, 1990 | EF3 | 62 km | 1.0 mi | 0 |
| May 12, 1980 | EF3 | 72 km | 15.8 mi | 0 |
| May 4, 1977 | EF3 | 83 km | 26.2 mi | 1 |
| May 4, 1977 | EF3 | 75 km | 11.2 mi | 0 |
| Apr 23, 1975 | EF3 | 63 km | 14.0 mi | 0 |
| Apr 13, 1974 | EF3 | 97 km | 0.1 mi | 0 |
| Apr 20, 1973 | EF3 | 96 km | 10.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
3 wildfires (100+ acres) recorded within 100 km. Largest: WOOLDRIDGE FIRE (1,323 acres, 2022).
| Year | Name | Acres Burned | Distance |
| 2022 | WOOLDRIDGE FIRE | 1,323 | 55 km |
| 2012 | HIGHWAY E | 897 | 81 km |
| 2006 | UNNAMED | 578 | 98 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 28°F (-2°C) | 1.8 in | Coldest, Driest |
| February | 32°F (0°C) | 2.1 in | |
| March | 43°F (6°C) | 3.2 in | |
| April | 54°F (12°C) | 4.1 in | |
| May | 65°F (18°C) | 5.0 in | |
| June | 74°F (23°C) | 5.5 in | Wettest |
| July | 77°F (25°C) | 4.7 in | Warmest |
| August | 76°F (24°C) | 3.8 in | |
| September | 68°F (20°C) | 3.7 in | |
| October | 56°F (13°C) | 3.5 in | |
| November | 43°F (6°C) | 2.4 in | |
| December | 33°F (0°C) | 2.1 in |
Gilliam has a seasonal temperature swing of 50°F / from 28°F in January to 77°F in July. Total annual precipitation is 41.7 inches, with June being the wettest month (5.5") and January the driest (1.8").