Climate Graphs

Climate data on this page is PRELIMINARY (unofficial). CERTIFIED (official) climate data is available from the
National Centers for Environmental Information or the Midwestern Regional Climate Center.
Questions? E-mail our Webmaster, or call (217) 732-3089

Customizable climate graphs

Graphs of observed temperatures and precipitation are available from several airport stations from around central and southeast Illinois. These are available for individual months, and the year to date. Go to the bottom of the page for help on how to interpret these graphs.

**2019 Graphs:**
Bloomington Airport	Year to Date	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Champaign Airport	Year to Date	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Decatur Airport	Year to Date	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Lawrenceville Airport	Year to Date	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Lincoln NWS	Year to Date	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Mattoon Airport	Year to Date	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Peoria Airport	Year to Date	JAN	FEB	MAR	APR	MAY	JUN	JUN	AUG	SEP	OCT	NOV	DEC
Springfield Airport	Year to Date	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC

**2018 Graphs:**
Bloomington Airport	Year to Date	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Champaign Airport	Year to Date	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Decatur Airport	Year to Date	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Lawrenceville Airport	Year to Date	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Lincoln NWS	Year to Date	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Mattoon Airport	Year to Date	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Peoria Airport	Year to Date	JAN	FEB	MAR	APR	MAY	JUN	JUN	AUG	SEP	OCT	NOV	DEC
Springfield Airport	Year to Date	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC

**2017 Graphs:**
Bloomington Airport	Annual	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Champaign Airport	Annual	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Decatur Airport	Annual	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Lawrenceville Airport	Annual	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Lincoln NWS	Annual	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Mattoon Airport	Annual	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Peoria Airport	Annual	JAN	FEB	MAR	APR	MAY	JUN	JUN	AUG	SEP	OCT	NOV	DEC
Springfield Airport	Annual	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC

For specific daily observations, visit https://www.weather.gov/climate/index.php?wfo=ilx and select the "Preliminary Climatological Data (CF6)" option.

Here are descriptions on how to interpret these graphs:

This is an example of the monthly climate plot. The observed high and low temperatures are indicated by the tops and bottoms of the vertical blue bars, respectively. The normal temperature ranges are indicated by the green band. Record highs are shown on the top of the light pink band, and record lows are indicated along the bottom of the light blue band.

Please note that while all sites (except Bloomington Airport) have the normals indicated on the plots, only the data for Lincoln, Peoria, and Springfield will have record data included.

This is an example of the year to date climate plot. As with the monthly plot, observed temperatures are shown by the dark blue areas, normals with the light green areas, record highs in the light red areas, and record lows in the light blue areas.

The bottom portion of the graph indicates the precipitation and snowfall for the year to date. The yellow line (and green area below it) represents the normal year to date total at the given time frame. Periods that have year to date totals above the climatological normals are shown by dark green areas above the yellow line. Periods that are below normal are shown with the brown areas below the yellow line.

As with the monthly graphs, the records are only available on the graphs for Lincoln, Peoria, and Springfield.