Preliminary May 2009 Climate Information for NWS Marquette

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.

May 2009 Climate Chart

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:

  • On May 9, a new record low high temperature of 35 degrees was set.  This broke the old record of 37 degrees, which was set in 1986.
  • A record daily high temperature was set on May 20, when the temperature peaked at 89 degrees. The previous record was set in 1992. The 20th was the first day above 80 degrees at the NWS office since September 2, 2008.
  • On May 26, the NWS office in Negaunee Township broke the daily record precipitation of 0.72 inches. The previous record was set in 1991 with 0.66 inches.
  • A record low high temperature of 48 degrees was tied on May 27, which was previously set in 1993.
  • On May 31, a new record low temperature of 29 degrees was set. This broke the old record of 30 degrees, which was set in 1964.

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.

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