Month Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Year
Year 2017 2017 2017 2017 2018 2018 2018 2018 2018 2018 2018 2018
Precipitation (inches) Total
Current Year 2.62 0.6 1.16 0.93 0.27 1.21 1.46 1.21 3.84 4.46 1.12 0.79 19.67
Average (1910-2018) 1.44 0.92 0.57 0.54 0.54 0.45 0.71 1.22 2.63 3.08 1.65 1.59 15.34
Difference 1.18 -0.32 0.59 0.39 -0.27 0.76 0.75 -0.01 1.21 1.38 -0.53 -0.8 4.33
Temperature (°F) Average
Current Year 55.9 43.1 32.5 23.1 25.2 13 31.8 37.2 55 58.5 65.5 65.6 42.2
Average (1912-2018) 54.9 44.9 32.9 24.9 21.8 24.7 30.6 40.8 50.2 57.9 66 65 42.9
Difference 1 -1.8 -0.4 -1.8 3.4 -11.7 1.2 -3.6 4.8 0.6 -0.5 0.6 -0.7
Last killing frost in spring*
First killing frost in fall*
Frost free period
Minimum winter temperature__________________________________________________________
Summary of climatic data by months for the 2017-2018 crop year (September to August) and averages for the periods 1910-2018 (precipitation) and 1912-2018 (temperature) at the Central
Agricultural Research Center, Moccasin, Montana.
*In this summary 32°F is considered a killing frost
May 2 (30°F)
May 27
August 28 (32°F)
September 18
118 days
113 days
103°F on August 12, 2018
-22°F on February 12, 2018
2018_________________________________________________________________________
Avg. 1912-2018________________________________________________________________
2018_________________________________________________________________________
Avg. 1912-2018________________________________________________________________
2018_________________________________________________________________________
Avg. 1912-2018________________________________________________________________
Maximum summer temperature_______________________________________________________
