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May 2015 Was ‘A Whole Lot’ Warmer Than Average

OSWEGO, NY – May 2015 was a lot warmer than average and a tad drier, according to Bill Gregway, local observer for the National Weather Service.

The average temperature last month was 61.8 degrees. That is 5.8 degrees higher than average.

A squirrel lounges on the back of a bench, enjoying the warm May weather in Oswego's East Park.
A squirrel lounges on the back of a bench, enjoying the warm May weather in Oswego’s East Park.

“That’s a whole lot above, considering we didn’t have any records last month,” Gregway said.

The highest temperature was 88 degrees on the 9th. It missed tying the record (89) for that day.

The lowest temperature was 36 degrees on the 23rd.

May had 9 days where the high was 80 degrees or above, 3 of them were in a row.

The overnight low was in the 30s just 3 times.

“We didn’t have any frosts or a freeze,” Gregway said.

Total precipitation last month came in at 3.11 inches. That is 0.06-inch below normal.

Since the first of the year, total precipitation stands at 12.60 inches. That is 3.87 inches below average.

The greatest precipitation in a 24-hour period was 0.85-inch on the 12th.

There were 13 days of measurable precipitation, with streaks of 4 and 3 days in a row.

One day saw just a trace.

No measurable precipitation fell on 17 days. There were streaks of 6, 4 and 3 days in a row.

“It was a dry month,” Gregway said. “Most all of our precipitation came in bunches.”

For example, he noted that on the 10th, we had a brief thunderstorm. The area received 0.50-inch of rain in just 15 minutes.

The number of cloudy days, 11, was 1 below average.

The number of partly cloudy days, 13, was 3 above average.

The number of clear days, 7, was 2 below normal.

May received 59 percent of the possible amount of sunshine. That’s 4 percentages above average.

There were 4 thunderstorms. That is 1 above average.

There were 5 foggy days. That is 3 above average.

And, there was no snow. May usually receives a trace.

The highest barometric pressure was 30.46 on the 14th and the lowest was 29.78 on the 12th.

“There wasn’t a lot of a wind last month,” Gregway said. “The strongest winds were west-northwesterly at greater than 30 mph on the 20th.”

Last month’s average temperature is the 4th warmest on record going back to 1854.

The warmest May was rather just recently. May 2012 was 62.7 degrees.

The coldest May on record is 46.4 degrees in 1917.

The highest temperature in May is 94 degrees on May 30, 1879. The coldest is 27 degrees on May 10, 1883.

May 1931 is the wettest with 7.47 inches. The driest is 0.18-inch in 1920.