Petersburg, IL

Full City Profile · Illinois · Menard County County

3.3 /5.0

B Good

2,590 Population 1,660/sq mi density

$59,850 Median Income $41,332 per capita

$174,800 Home Value $202,729 Zillow

$665 Median Rent 30.9% income on rent

52°F Avg Temperature 275 sunny days/yr

45 Violent Crime/100K 949 property/100K

Overall

3.3 / 5.0

Good overall score based on economy, affordability, safety and education

Economy

4.0 / 5.0

$59,850 median income, 0.6% unemployment

A+

Affordability

5.0 / 5.0

$174,800 home value, $665/mo rent

Safety

1.0 / 5.0

45 violent crimes/100K

Education

3.4 / 5.0

29.6% bachelor's degree or higher

Petersburg experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 26°F in January while summers reach 76°F in July. The area gets 275 sunny days per year. Annual precipitation totals 37.7 inches. The area receives 15.2 inches of snow annually. Air quality is rated Good with a median AQI of 43.

Temperature

26°F Jan (-3°C) 76°F Jul (24°C)

Annual Average	52.3°F
	3% below US avg
January Average	26°F (-3°C)
July Average	76°F (24°C)
Sunny Days	275 days/yr

Geography

Elevation	500 ft (152 m)
Area	0.6 sq mi (1.5 km²)
Population Density	1,660/sq mi
Coordinates	40.0143°N, 89.8453°W
Timezone	America/Chicago
County	Menard County County
Nearest Airport	General Downing - Peoria International (PIA) 46 miles away

Precipitation & Snow

Annual Rainfall 37.7"

1% below US avg

Snowfall 15.2"

Wettest Month (May) 4.13"

Driest Month (Jan) 1.54"

Air Quality

AQI Median	43.0
Rating	Good

Natural Hazard Risk

Overall Risk	Very Low
Risk Score	28.7 / 100
Social Vulnerability	62.1 / 100
Community Resilience	83.5 / 100

Hazard Breakdown

Tornado	Relatively Low
Hurricane	Very Low
Earthquake	Relatively 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	Relatively Low
Drought	Relatively Moderate
Cold Wave	Relatively Low
Landslide	Relatively Low

Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

6 earthquakes (M2.5+) within 150 km since 1990. Strongest: M3.4. Most recent: M3.3 on May 13, 2025.

Mar 2, 1990	9 km NW of Vernon, Illinois	M3.4	142 km
May 13, 2025	7 km SSW of Lerna, Illinois	M3.3	149 km
Jan 29, 1993	7 km WNW of Brownstown, Illinois	M3.2	130 km
Jul 1, 2017	9 km SSE of Mulberry Grove, Illinois	M3.1	140 km
Sep 5, 2004	3 km WNW of Saint Peter, Illinois	M2.9	150 km
Sep 19, 2024	1 km S of Old Monroe, Missouri	M2.6	144 km

Source: USGS (M2.5+, 1990–2025)

Tornado History

745 tornadoes (EF0+) within 100 km since 1950. Strongest: EF4. Total: 22 fatalities, 844 injuries.

Date	Rating	Distance	Fatalities
Nov 17, 2013	EF4	72 km	3
Jul 13, 2004	EF4	98 km	0
May 13, 1995	EF4	55 km	0
May 5, 1977	EF4	57 km	0
Jun 29, 1976	EF4	88 km	0
Mar 20, 1976	EF4	92 km	0
Jun 14, 1957	EF4	32 km	2
Apr 4, 2023	EF3	54 km	0
Dec 1, 2018	EF3	77 km	0
Apr 19, 2011	EF3	64 km	0
Dec 31, 2010	EF3	4 km	0
Aug 19, 2009	EF3	25 km	0
May 10, 2003	EF3	53 km	0
Jun 1, 1999	EF3	79 km	1
Apr 19, 1996	EF3	54 km	0
Apr 19, 1996	EF3	61 km	0
May 13, 1995	EF3	46 km	0
May 9, 1995	EF3	18 km	0
May 1, 1983	EF3	87 km	0
Jun 21, 1981	EF3	71 km	1

Source: NOAA SPC (EF0+, 1950–2024)

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	26°F (-3°C)	1.5 in	Coldest, Driest
February	30°F (-1°C)	1.6 in
March	41°F (5°C)	3.0 in
April	53°F (12°C)	3.6 in
May	63°F (17°C)	4.1 in	Wettest
June	72°F (22°C)	3.7 in
July	76°F (24°C)	3.8 in	Warmest
August	74°F (23°C)	3.4 in
September	67°F (19°C)	3.5 in
October	55°F (13°C)	2.8 in
November	42°F (5°C)	2.9 in
December	30°F (-1°C)	2.6 in

Petersburg has a seasonal temperature swing of 50°F / from 26°F in January to 76°F in July. Total annual precipitation is 36.6 inches, with May being the wettest month (4.1") and January the driest (1.5").

View full weather details →