Hot-summer humid continental

Mount Vernon, Illinois

Jefferson County, Illinois · Population 14k · 509 ft elevation

Living in Mount Vernon

Mount Vernon has a hot-summer humid continental climate: hot summers (July highs around 86°F) and cold winters (January lows around 22°F).

Precipitation is wet at about 45″ a year, and it gets light snow (10″ a season).

Skies are sunny (62% of possible sunshine). Summers get sticky, with about 63 muggy days a year.

Air quality is moderate: a median AQI of 42 and virtually no unhealthy-air days.

Mount Vernon at a glance

Population
14k
Elevation
509 ft
Average daily high
64°F39th percentile
Average daily low
45°F47th percentile
Annual precipitation
45″56th percentile
Annual snowfall
10″46th percentile
Sunshine hours per year
2,800 hrs49th percentile
Median AQI
4252th percentile
Median home value
$90k3th percentile
Median rent
$893/mo23th percentile
Median household income
$53k19th percentile
Property tax rate
2.29%94th percentile
Top state income-tax rate
5.0%
Sales tax (state + local)
8.9%
Unemployment rate
8.2%
Homes with broadband
88%32th percentile
Walkability index
8.550th percentile
Average commute
14 min
Math proficiency (8th grade)
8%1th percentile
Reading proficiency (8th grade)
12%
Violent crime rate
576 per 100k91th percentile
Property crime rate
2,013 per 100k
Overall natural-hazard risk
7729th percentile
Outdoor access
33th percentile
Public land within 10 miles
0%
Public land within 30 miles
0%
Mountain relief within 30 miles
197 ft

Climate by month

Average monthly weather in Mount Vernon, Illinois
MonthHighLowPrecipitationSnowSunshine
Jan38°F22°F2.6″3.2″151 hrs
Feb44°F25°F2.6″3.1″153 hrs
Mar54°F34°F4.0″1.0″193 hrs
Apr65°F44°F5.0″—241 hrs
May74°F55°F5.1″—272 hrs
Jun82°F64°F4.8″—326 hrs
Jul86°F67°F3.8″—338 hrs
Aug85°F65°F3.3″—317 hrs
Sep79°F57°F3.4″—271 hrs
Oct67°F45°F3.5″0.2″224 hrs
Nov54°F34°F4.0″0.4″177 hrs
Dec43°F26°F2.9″2.5″139 hrs

Near Mount Vernon

Largest places in Illinois

Sources: NOAA climate normals, NASA POWER, EPA air quality, U.S. Census Bureau, FEMA, FBI, EPA walkability and EDFacts. Methodology