May 2009 was a month of up and down temperatures, with the largest daily high temperature swing on record at NWS Marquette occurring between May 19th and 20th. On May 19th, the high temperature only reached 44 degrees. Just one day later, strong southwesterly winds pushed the high temperature to 89 degrees, which created a record 45 degree high temperature swing. The previous record was April 30th to May 1st 1992, which had a 36 degree high temperature swing. The high temperature on April 30th, 1992 was 44 degrees and the high on May 1st, 1992 was 80 degrees. The up and down temperatures during the month can be seen in the chart below.
Additional Monthly Climate Graphs can be found here.
Preliminary May 2009 Climate Values and Records
Overall, May 2009 ended up with below normal temperatures, precipitation, and snowfall.
Value Departure from Normal
Average Temperature 47.9 -3.1
Precipitation 2.51 -0.56
Snowfall 0.1 -1.4
Here are the preliminary records that occurred in May 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.