November: Your basic below-average month
CHAMPAIGN — November's weather was below average in both temperatures and precipitation, according to the Illinois State Water Survey at the University of Illinois.
In fact it was the second-coldest month of the year, in terms of departure from average. November's average temperature was 38.5 degrees, nearly 3 degrees below the 30-year mean average for November in Champaign-Urbana. The only month with a bigger departure from average was March, which was 5.5 degrees below the 30-year average.
So far in 2013 Champaign-Urbana temperatures are averaging about one-tenth of a degree below normal, although only five of 11 months so far have reported below average mean temperatures: March, April, June, July and November.
Precipitation last month in Champaign-Urbana was 2.14 inches below average, continuing a nearly two-year trend. Precipitation for the year is now almost 4.78 inches below normal. It was nearly 7 inches below normal in 2012.
Champaign-Urbana received a half-inch of snowfall in November — all on Nov. 12 — which is below the November snowfall average of 0.9 inches.
There was a 60-degree spread in temperatures last month, from a high of 71 degrees on Nov. 17 — the day of the record tornado outbreak in Illinois — to a low of 11 degrees on Nov. 24.
Although no Champaign-Urbana temperature or precipitation records were set last month, state climatologist Jim Angel said there were four days where the high temperature never got above freezing: Nov. 12, 23, 24 and 27.
"That's a little bit unusual," Angel said. "The last time we had that was 2000."
Looking ahead, December temperature and precipitation forecasts for Illinois show equal chances of normal, above normal and below normal temperatures and precipitation, according to the Climate Prediction Center at the National Weather Service.