After experiencing the 4th warmest and 6th driest September on record at the National Weather Service (NWS) office in Negaunee Township last month, October 2009 was the complete opposite. This was largely due to a strong low pressure system that moved through the Great Lakes region at the end of September, which changed the weather to a cooler and more active pattern. As you can see in the chart below, temperatures were below normal for most of the month. In fact, there were only 8 days where the temperature was above normal, with 5 of those days occurring at the end of the month. Overall, October 2009 will go down as the 5th coldest and 2nd wettest on record.
Additional Monthly Climate Graphs can be found here.
Preliminary October 2009 Climate Values and Records
Overall, October 2009 ended up with below normal temperatures and above normal precipitation.
Value Departure from Normal
Average Temperature 39.0 -4.2
Precipitation (liquid) 6.95 +3.29
Snowfall 2.0 -3.9
Here are the preliminary records that occurred in October 2009:
Note: the statistics and records for the National Weather Service office in Negaunee Township are based on records which began in October 1961. All climate data listed here are preliminary and unofficial.