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Weather & Climate in Pleasant Hill, IL
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Pleasant Hill experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 28°F in January while summers reach 78°F in July. The area gets 302 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 38.5 inches. The area receives 11.6 inches of snow annually. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 459 feet.
Temperature
28°F Jan (-2°C)
78°F Jul (26°C)
| Annual Average | 54.4°F |
| 1% above US avg | |
| January Average | 28°F (-2°C) |
| July Average | 78°F (26°C) |
| Sunny Days | 302 days/yr |
Geography
| Elevation | 459 ft (140 m) |
| Area | 0.8 sq mi (2.1 km²) |
| Population Density | 1,279/sq mi |
| Coordinates | 39.4432°N, 90.8729°W |
| Timezone | America/Chicago |
| County | Pike County County |
| Nearest Airport | Quincy Regional-Baldwin Field (UIN) 39 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 30.3 / 100 |
| Social Vulnerability | 41.9 / 100 |
| Community Resilience | 54.8 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Very Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
7 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M2.9.
| Feb 8, 2004 | 6 km SSW of Stoutsville, Missouri | M2.9 | 87 km | 5 km |
| Apr 29, 2022 | 1 km SSW of Peerless Park, Missouri | M2.8 | 107 km | 8 km |
| May 5, 2008 | 3 km SSE of Fenton, Missouri | M2.8 | 113 km | 19 km |
| Sep 5, 2015 | 5 km SE of High Ridge, Missouri | M2.7 | 118 km | 8 km |
| Mar 7, 2009 | 7 km S of Miramiguoa Park, Missouri | M2.6 | 142 km | 7 km |
| Sep 19, 2024 | 1 km S of Old Monroe, Missouri | M2.6 | 59 km | 2 km |
| Jan 15, 1998 | 1 km SSE of Fenton, Missouri | M2.5 | 112 km | 16 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
489 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 13 fatalities, 554 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 22, 2011 | EF4 | 85 km | 21.3 mi | 0 |
| Jan 24, 1967 | EF4 | 89 km | 25.0 mi | 3 |
| Dec 10, 2021 | EF3 | 94 km | 24.8 mi | 1 |
| May 31, 2013 | EF3 | 95 km | 10.6 mi | 0 |
| May 31, 2013 | EF3 | 85 km | 31.7 mi | 0 |
| Apr 19, 2011 | EF3 | 90 km | 4.3 mi | 0 |
| Mar 13, 2006 | EF3 | 61 km | 44.5 mi | 0 |
| Mar 13, 2006 | EF3 | 76 km | 6.0 mi | 0 |
| May 10, 2003 | EF3 | 78 km | 12.0 mi | 0 |
| Nov 15, 1988 | EF3 | 73 km | 1.0 mi | 0 |
| Apr 29, 1984 | EF3 | 55 km | 8.0 mi | 0 |
| May 1, 1983 | EF3 | 54 km | 4.0 mi | 0 |
| Jun 21, 1981 | EF3 | 90 km | 8.8 mi | 1 |
| Apr 7, 1980 | EF3 | 87 km | 7.3 mi | 0 |
| Sep 30, 1973 | EF3 | 88 km | 0.1 mi | 0 |
| Jun 12, 1970 | EF3 | 89 km | 16.0 mi | 0 |
| Oct 24, 1967 | EF3 | 87 km | 21.8 mi | 0 |
| Jan 24, 1967 | EF3 | 94 km | 5.1 mi | 1 |
| Oct 14, 1966 | EF3 | 80 km | 2.7 mi | 0 |
| Apr 22, 1963 | EF3 | 99 km | 42.9 mi | 1 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 28°F (-2°C) | 1.5 in | Coldest, Driest |
| February | 32°F (-0°C) | 1.7 in | |
| March | 43°F (6°C) | 3.1 in | |
| April | 54°F (12°C) | 3.7 in | |
| May | 64°F (18°C) | 4.3 in | Wettest |
| June | 73°F (23°C) | 3.6 in | |
| July | 78°F (26°C) | 3.7 in | Warmest |
| August | 75°F (24°C) | 3.3 in | |
| September | 68°F (20°C) | 3.4 in | |
| October | 56°F (13°C) | 2.8 in | |
| November | 43°F (6°C) | 3.1 in | |
| December | 32°F (-0°C) | 2.5 in |
Pleasant Hill has a seasonal temperature swing of 50°F / from 28°F in January to 78°F in July. Total annual precipitation is 36.8 inches, with May being the wettest month (4.3") and January the driest (1.5").