Brrrr—Cool summer predicted

IRON MOUNTAIN – Summer will be cool in the Upper Peninsula, the National Weather Service predicts.

From now through September, there’s a greater than climatological chance of below normal temperatures, according to the Climate Prediction Center.

The long-range forecast calls for normal precipitation.

The average temperature at most places in the Upper Peninsula in June is about nine degrees higher than in May, noted Kevin Crupi, weather service meteorologist at Marquette. Sunshine peaks at 950 minutes around the summer solstice, which occurs this year at 5:51 a.m. (Central time) on Saturday, June 21.

Data from May shows the month was slightly warmer than normal at Iron Mountain-Kingsford. The average temperature was 53.9 degrees, which was 0.2 degrees above the three-decade average, Crupi said.

The highest reading was 88 degrees on May 31 and the lowest was 28 degrees on May 5. No new daily or monthly records were established.

“Despite the near normal overall conditions in May, the March through May period ended up as the fourth coldest meteorological spring on record at Iron Mountain-Kingsford due to the very cold weather that dominated in March and April, when a deep trough dominated and extensive ice cover on Lake Superior lowered temperatures further,” Crupi said.

The average temperature from March through May was 36.1 degrees, which was 4.9 degrees below normal. The record-coldest spring was in 1950, when temperatures averaged 35.4 degrees.

Precipitation in May measured 2.85 inches, all of it rain, which was 0.19 inches below normal. Currently, there are no drought conditions in Michigan or Wisconsin, according to the U.S. Drought Monitor.

The weather pattern in May featured a major change soon after the middle of the month when a trough of Canadian air that had dominated since Thanksgiving finally lifted, Crupi said. Across the region, temperatures averaged 5 to 10 degrees below normal the first 17 days of May and then 5 to 10 degrees above normal after May 18.

Iron Mountain’s average temperature of 53.9 degrees made it the warmest spot in the U.P. in May, while Marquette was the coldest at 46.5 degrees.

Statistics for the Iron Mountain-Kingsford Wastewater Treatment plant cooperative observer site are based on records that began in 1931. Normals used are for the period 1981 through 2010.

Some other temperature and precipitation observations across the Upper Peninsula in May:

– Ironwood, average temperature 52.2 degrees (0.3 degrees above normal); precipitation 3.85 inches (0.72 inches above normal); snowfall, none (1.9 inches below normal)

– Copper Harbor, average temperature 48.1 degrees, precipitation 2.83 inches.

– Baraga, average temperature 50.1 degrees, precipitation 2.23 inches.

– Big Bay, average temperature 49.7 degrees, precipitation 2.66 inches, snowfall 2.8 inches.

– Marquette, average temperature 46.5 degrees (4.5 degrees below normal); precipitation 2.6 inches (0.15 inches above normal); snowfall, trace (0.6 inches below normal).

– Munising, average temperature 47.7 (2.3 degrees below normal), precipitation 3.86 inches (0.88 inches above normal), snowfall 3.0 inches (2.7 inches above normal).

– Newberry, average temperature 49.7 degrees (1.9 degrees below normal), precipitation 2.98 inches (0.37 inches above normal).

– Iron River, average temperature 50.9 degrees, precipitation 2.22 inches, snowfall 0.5 inches.

– Norway, average temperature 53.5 degrees; precipitation 2.46 inches; snowfall, trace.

– Escanaba, average temperature 53.3 degrees, precipitation 2.73 inches.

– Manistique, average temperature 46.9 degrees, (2.4 degrees below normal), precipitation 2.38 inches (0.35 inches below normal).

Jim Anderson’s email address is