National Weather Service United States Department of Commerce

Temperatures have been quite warm to start the first half of December. Many locations have seen this 2-week period among the top 5 warmest on record for hte first half of the month, with Peoria seeing its warmest such period. Only a couple days early in the month have seen highs below normal, and the period from the 8-14th saw low temperatures frequently warmer than the normal highs! A period of cooler conditions is on tap for late this week, but temperatures will trend upward again. The outlook for December 22-28 indicates a 90% chance of above normal temperatures, which would not bode well for White Christmas prospects.  

 

Location Average
Temperature
Dec. 1-14
Rank
Record
Charleston 45.2 3rd warmest 45.9 in 2012
Decatur 43.6 Tied 3rd warmest 47.3 in 2001
Effingham 42.3 8th warmest 45.9 in 1918
Galesburg 39.8 3rd warmest 43.0 in 1998
Lincoln 41.4 7th warmest 44.1 in 1998
Normal 41.0 9th warmest 43.4 in 1998
Olney 45.1 Tied 5th warmest 47.0 in 1918
Paris 43.0 4th warmest 47.0 in 1998
Peoria 44.8 1st warmest 44.4 in 1889
Springfield 45.4 3rd warmest 45.9 in 1889 and 2012
Urbana 41.8 8th warmest 44.8 in 1998

 

Graphs of observed temperatures for Peoria & Springfield through Dec. 14