Lawrence County Climate
Lawrence County, Illinois
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
55.3°F
Annual Precip
44.1"
Annual Snowfall
15.5"
Extreme Heat Days
41
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6b
Minimum winter temperature range for plant survival
4,051
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Lawrence County
Climate Verdict
Lawrence County has a mild, with an average annual temperature of 55.3°F, moderately wet with 44.1 inches of annual precipitation, occasional hot days — 40.5 per year above 90°F, light snow averaging 15.5 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 30.6°F. summers are warm — July averages 77.2°F. The 47°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
The moderate temperatures support hiking, cycling, and camping comfortably in spring, summer, and fall.
Regional Context
Lawrence County closely matches the Illinois statewide average temperature of 52.8°F, it is somewhat wetter than average for Illinois.
Climate Profile
About Lawrence County Weather
A Warmer Profile in the Heartland
Lawrence County maintains an average annual temperature of 55.3°F, placing it well above the national median for continental climates. Its position in southeastern Illinois results in a humid profile with 44.1 inches of annual precipitation, exceeding typical interior averages.
Warmth Exceeding the Illinois Average
The county's 55.3°F annual average temperature is significantly higher than the Illinois state average of 52.8°F. This makes Lawrence one of the warmer spots in the state, benefitting from its southern latitude.
Southeastern Illinois Comparison
While neighbors to the north experience harsher winters, Lawrence sees a milder December through February average of 33.5°F. It receives more annual rainfall than central neighbors like Logan or Macon, totaling 44.1 inches compared to their sub-40-inch averages.
Intense Summers and Mild Winters
Residents face 41 days of extreme heat over 90°F annually, reflecting a humid and intense summer peak of 77.2°F in July. Winter brings a manageable 15.5 inches of snowfall, which is much lower than the northern regions of the state.
Planning for High Heat and Humidity
High-efficiency cooling systems are essential here given the 41 annual extreme heat days. Homeowners should also maintain clear gutters and drainage systems to handle the significant 44.1 inches of annual rainfall.
Frequently Asked Questions
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Data sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.