Crop & Pest Report


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Weather Forecast (6/04/20)

The June 4 to June 10, 2020 Weather Summary and Outlook

The month of May finished drier and cooler than average.  A high percentage of the North Dakota Agricultural Weather Network (NDAWN) stations recorded around or less than 50% of average precipitation during the month (Figure 1).


The first half of May was well below normal for temperatures with some locations recording temperatures 10 degrees below average.  The second half of the month was much warmer but the month overall still finished between 5° and 2° below the current 30-year average at most NDAWN stations (Figure 2).


June on the other hand started off quite warm with many locations in eastern North Dakota recording the first 90°+ high of the season.  The current pattern with most of the northern plains recording above average temperatures is expected to continue through the weekend and in eastern North Dakota and western Minnesota probably into Monday.   Although there will be some localized areas with rain today and tomorrow, the weekend will bring the highest probabilities for rain as scattered thunderstorms are expected both Saturday and Sunday that should continue into early next week as cooler air moves into the region.

The projected growing degree days (GDDs) base 32°, 44° and 50° for the period of June 4 through June 10, 2020 can be found in Figure 3.


Using May 1 as a planting date, accumulated growing degree days for wheat (base temperature 32°) is given in Figure 4.   You can calculate wheat growing degree days based on your exact planting date(s) here:


Using May 20 as a planting date, accumulated growing degree days for corn (base temperature 50°) is given in Figure 5.   You can calculate corn growing degree days based on your exact planting date(s) here:


Soybeans also use base 50° like corn, but NDAWN has a special tool for soybeans that based on your planting date and cultivar can estimate maturity dates based on average temperatures, as well as give you GDDs based on your planting date(s) you set.  That tool can be found here:


Daryl Ritchison


Director of the North Dakota Agricultural Weather Network

This site is supported in part by the Crop Protection and Pest Management Program [grant no. 2017-70006-27144/accession 1013592] from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed are those of the website author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.

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