National Weather Service United States Department of Commerce

Excessive Heat Continues in the Southwest on Monday

A cold front will bring relief to the Pacific Northwest on Monday, but the Southwest will see above average temperatures again. Excessive Heat Warnings are in effect for many locations through Monday evening. The hottest temperatures will be in the desert as daytime high temperatures may exceed 115 degrees. Read More >

Duluth and International Falls spring Climate Summary
and summer Climate Outlook
THE DULUTH CLIMATE SUMMARY FOR THE SEASON, FROM 3/1/2017 TO 5/31/2017

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1870 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR'S         
                 VALUE   DATE(S)  VALUE   FROM    VALUE               
                                          NORMAL                      
.............................................................
TEMPERATURE (F)
RECORD
 HIGH              95   05/30/1939                                    
 LOW              -29   03/02/1989                                    
HIGHEST            75   05/27        MM      MM       92              
LOWEST             -9   03/03        MM      MM       -2              
MEAN             39.6              39.0     0.6     40.9              

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        11.93   2012                                          
TOTALS           8.18              7.15    1.03     8.23              

SNOWFALL (INCHES)
SINCE 7/1        67.0                                                 

DEGREE_DAYS
HEATING TOTAL    2317              2399     -82     2207              
COOLING TOTAL       0                 4      -4        9              
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              10.2
HIGHEST WIND SPEED/DIRECTION    46/260    DATE  03/07                              
HIGHEST GUST SPEED/DIRECTION    60/260    DATE  03/07                          

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM                                      


                                                                    
-  INDICATES NEGATIVE NUMBERS.                                      
R  INDICATES RECORD WAS SET OR TIED.                                
MM INDICATES DATA IS MISSING.                                       
T  INDICATES TRACE AMOUNT.                                          

Spring 2017 was warmer than normal with

above normal precipitation at Duluth, MN

The average temperature for the spring season was 39.6 degrees which was 0.6 degrees above the normal of 39.0 degrees. The highest temperature for the spring was 75 degrees on May 27th. The lowest temperature for the spring was -9 degrees on March 3rd. No monthly temperature records were broken for this spring.

The spring of 2017 was above normal for precipitation with a total of 8.18 inches of precipitation recorded for the season. This was 1.03 inches above the normal of 7.15 inches. The greatest amount of precipitation in a 24 hour period occurred on May 16th when 1.40 inches was recorded. At least 0.01 inches of precipitation fell on 31 days. At least 0.10 inches of precipitation fell on 18 days. At least 0.50 inches fell on 6 days. At least 1.00 inches fell on 1 day. 8.0 inches of snow fell for the season which was 12.5 inches below the normal of 20.5 inches. This was the 13th least snowiest spring season on record. The greatest amount of snowfall in a 24 hour period occurred on March 16th to March 17th where 3.8 inches of snow was recorded. No monthly precipitation or snowfall records were broken this spring.

The average wind speed for the spring was 10.2 mph. The highest sustained wind occurred on March 7th with a speed of 46 mph out of the west. The highest peak wind gust occurred on March 7th with a speed of 60 mph out of the west. 

There were 2317 heating degree days for the spring which was 82 below the normal of 2399. There were 0 cooling degree days for the spring which was 4 below the normal of 4. The highest sea level pressure reading for the spring was 30.71 inches reached on March 10th and the lowest sea level pressure reading was 29.03 inches reached on March 7th.

 

THE INTERNATIONAL FALLS MN CLIMATE SUMMARY FOR THE SEASON, FROM 3/1/2017 TO 5/31/2017

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1895 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR'S         
                 VALUE   DATE(S)  VALUE   FROM    VALUE               
                                          NORMAL                      
.............................................................
TEMPERATURE (F)
RECORD
 HIGH              95   05/21/1964                                    
 LOW              -38   03/01/1962                                    
HIGHEST            76   05/27        MM      MM       89              
                        05/26                                         
LOWEST            -15   03/03        MM      MM      -17              
MEAN             37.7              38.2    -0.5     39.8              

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         8.72   2013                                          
TOTALS           3.87              5.34   -1.47     6.43              

SNOWFALL (INCHES)
SINCE 7/1        70.4                                                 

DEGREE_DAYS
HEATING TOTAL    2490              2474      16     2296              
COOLING TOTAL       0                 9      -9        2              
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              7.6
HIGHEST WIND SPEED/DIRECTION    32/240    DATE  03/07                                
HIGHEST GUST SPEED/DIRECTION    56/260    DATE  03/07                            

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM                                      


                                                                    
-  INDICATES NEGATIVE NUMBERS.                                      
R  INDICATES RECORD WAS SET OR TIED.                                
MM INDICATES DATA IS MISSING.                                       
T  INDICATES TRACE AMOUNT.                                          

Spring 2017 was cooler with below normal precipitation at

International Falls, MN

The average temperature for the spring season was 37.7 degrees which was 0.5 degrees below the normal of 38.2 degrees. The highest temperature for the spring was 76 degrees on May 26th and May 27th. The lowest temperature for the spring was -15 degrees on March 3rd. No monthly temperature records were broken for this spring.

The spring of 2017 was below normal for precipitation with a total of 3.87 inches of precipitation recorded for the season. This was 1.47 inches below the normal of 5.34 inches. This was the 17th driest spring on record. The greatest amount of precipitation in a 24 hour period occurred on May 28th when 0.73 inches was recorded. At least 0.01 inches of precipitation fell on 25 days. At least 0.10 inches of precipitation fell on 13 days. At least 0.50 inches fell on 1 day. 7.1 inches of snow fell for the season which was 7.1 inches below the normal of 14.2 inches. This was the 14th least snowiest spring season on record. The greatest amount of snowfall in a 24 hour period occurred on March 16th to March 17th where 3.8 inches of snow was recorded. No monthly precipitation or snowfall records were broken this spring.

The average wind speed for the spring was 7.6 mph. The highest sustained wind occurred on March 7th with a speed of 32 mph out of the west. The highest peak wind gust occurred on March 7th with a speed of 56 mph out of the west. 

There were 2490 heating degree days for the spring which was 16 above the normal of 2474. There were 0 cooling degree days for the spring which was 9 below the normal of 9. The highest sea level pressure reading for the spring was 30.78 inches reached on March 10th and the lowest sea level pressure reading was 29.02 inches reached on March 6th.


 

Summer Climate Outlook

(Summer season defined as June, July and August)

Temperature Outlook Precipitation Outlook

Normal highs for Duluth start in the mid 60s in early June and warm to the upper 70s by mid July. By the end of August normal highs cool to the low 70s. Normal lows start in the mid 40s and warm to the mid 50s by early July. By the end of August normal lows cool to the low 50s. Normal precipitation for the summer is 11.78 inches.

Normal highs for International Falls start in the low 70s in early June and peak to the upper 70s during July. By the end of August normal highs cool to the low 70s. Normal lows start in the mid 40s and warm to the low 50s by late June. By the end of August normal lows cool to the upper 40s. Normal precipitation for the summer is 10.43 inches.

For both locations the latest Climate Prediction Center (CPC) outlook indicates that there is no clear indication for above or below normal temperatures or precipitation for the summer. 

 

Duluth, MN

Normals for the summer season
(The seasonal climate normals are from a 30 year period defined by the Climate Prediction Center as 1981-2010)

  The Normal, Seasonal Average Temperature (degrees F)

63.4

 

 

  Normal Seasonal Precipitation (inches)

11.78

  Normal Seasonal Snowfall (inches)

0

 

 

  Normal Heating Degree Days

329

  Normal Cooling Degree Days

186

 

Records for the summer season

  Warmest Season (Seasonal Average Temperature)

67.4 in 2012

  Coldest  Season (Seasonal Average Temperature)

58.8 in 1992

 

 

  Greatest Seasonal Precipitation (inches)

20.91 in 1873

  Least Seasonal Precipitation (inches)

3.94 in 1936

 

 

  Greatest Seasonal Snowfall (inches)

0.2 in 1945

  Least Seasonal Snowfall (inches)

0 in multiple years

 

 

 

International Falls, MN

Normals for the summer season
(The seasonal climate normals are from a 30 year period defined by the Climate Prediction Center as 1981-2010)

  The Normal, Seasonal Average Temperature (degrees F)

63.1

 

 

  Normal Seasonal Precipitation (inches)

10.43

  Normal Seasonal Snowfall (inches)

0.0

 

 

  Normal Heating Degree Days

346

  Normal Cooling Degree Days

173

 

Records for the summer season

  Warmest Season (Seasonal Average Temperature)

67.1 in 1921 & in 1973

  Coldest  Season (Seasonal Average Temperature)

58.3 in 2004

 

 

  Greatest Seasonal Precipitation (inches)

18.99 in 1942

  Least Seasonal Precipitation (inches)

4.95 in 1910

 

 

  Greatest Seasonal Snowfall (inches)

0.3 in 1969

  Least Seasonal Snowfall (inches)

0 in multple years