8 Freeze/Frost Occurrence Data 



Montana Agricultural Statistics 1996 



FREEZE/FROST OCCURRENCE DATA ^' 



Belgrade AP 



Big Sandy . 



Gallatin . 



Chouteau 



Big Timber , 



Bigforkl3 S 



Sweet Grass 



Flathead 



Billings Water Plant Yellowstone 



Bridger 



Carbon 



Broadus 



Chester 



Powder River 



Liberty 



Chinook 



Blaine 



Conrad Airport . . . 



Culbertson 



Pondera . 



Roosevelt 



Dillon WMCE 



Ekalaka . 



Beaverhead . . 



Carter 



Fairfield 



Fort Benton 



Geraldine 



Glendive 



Teton 



Chouteau 



Chouteau 



Dawson . 



Hamilton . 



Hardin . 



Ravalli 



Big Horn . 



36 

 32 

 28 



36 

 32 

 28 



36 

 32 

 28 



36 



32 

 28 



36 

 32 

 28 



36 

 32 

 28 



36 

 32 

 28 



36 



32 

 28 



36 

 32 

 28 



36 

 32 

 28 



36 



32 

 28 



36 

 32 

 28 



36 

 32 

 28 



36 

 32 

 28 



36 

 32 

 28 



36 

 32 

 28 



36 

 32 

 28 



36 

 32 

 28 



36 

 32 

 28 



May 29 

 May 09 

 Apr 24 



May 21 

 May 07 

 Apr 22 



May 15 

 May 02 

 Apr 19 



May 16 

 Apr 30 

 Apr 05 



May 11 

 Apr 25 

 Apr 18 



May 12 

 Apr 27 

 Apr 17 



May 10 

 May 01 

 Apr 20 



May 30 

 May 17 

 Apr 29 



May 16 

 May 03 

 Apr 18 



May 30 

 May 12 

 Apr 30 



May 20 

 May 06 

 Apr 26 



Junll 



May 17 

 May 02 



May 17 

 May 11 

 Apr 19 



May 23 

 May 07 

 Apr 23 



May 17 

 May 09 

 Apr 24 



May 23 

 May 06 

 Apr 28 



May 01 

 Apr 21 

 Apr 14 



May 20 

 May 06 

 Apr 19 



May 09 

 Apr 27 

 Apr 17 



Jun20 



Jun03 



May 09 



Jun08 



May 25 

 May 09 



JunOS 

 May 18 

 May 01 



Jun02 

 May 16 

 Apr 24 



May 26 

 May 12 

 Apr 30 



Jun05 

 May 16 

 May 02 



May 31 

 May 19 

 May 06 



Jun23 



Jun06 



May 15 



Jun02 

 May 16 

 May 04 



Junl9 

 May 27 

 May 13 



JunOS 

 May 22 

 May 14 



Jun30 



JunOS 



May IS 



Jun07 

 May 26 

 May 09 



Jun09 

 May 20 

 May 06 



JunOS 

 May 21 

 May 07 



Jun 17 

 May 24 

 May 10 



May 14 

 May 05 

 Apr 27 



Jun 07 

 May 24 

 May 04 



May 31 

 May 17 

 May 01 



Jul 12 



Jun 27 



May 24 



Jun 26 



Jun 12 

 May 25 



Jun 26 



Jun 03 



May 12 



Jun 19 

 May 31 



May 12 



Jun 10 

 May 29 

 May 12 



Jun 28 



Jun 04 



May 17 



Jun 22 



Jun 07 



May 21 



Jul 17 

 Jun 26 

 Jun 01 



Jun 19 



May 29 

 May 20 



July 09 



Jun 12 



May 25 



Jun 27 



Jun 07 



May 31 



Jul IS 

 Jun 30 

 Jun 03 



Jun 27 



Jun 10 



May 29 



Jun 26 



Jun 03 



May 19 



Jun 29 



Jun 03 



May 20 



Jul 12 



Junll 



May 22 



May 28 

 May 19 

 May 09 



Jun 25 



Jun 12 



May 19 



Jun 22 



Jun 05 



May 14 



Aug 20 

 Aug 28 

 Sep OS 



Aug 19 



Sep 01 

 Sep 09 



Aug 25 

 Sep 04 

 Sep 15 



Aug 29 

 Sep 11 

 Sep 22 



Sep 01 

 Sep 06 

 Sep IS 



Aug 27 

 Sep 06 

 Sep 18 



Aug 20 

 Aug 31 

 Sep 10 



Aug 12 

 Aug 27 

 Sep 03 



Aug 22 

 Sep 03 

 Sep 09 



Aug 17 

 Aug2S 

 Sep 07 



Aug 10 

 Aug 27 

 Sep 06 



Aug 15 

 Aug 25 

 Sep 03 



Aug 17 

 Aug 30 

 Sep 07 



Aug 28 

 Sep 04 

 Sep 15 



Aug 26 

 Sep 02 

 Sep OS 



Aug 19 



Sep 03 

 Sep 06 



Sep 04 

 Sep 10 

 Sep 21 



Aug 25 

 Sep 06 

 Sep 17 



Aug 27 

 Sep 06 

 Sep 15 



Sep 04 

 Sep 12 

 Sep 23 



Sep 04 

 Sep 14 

 Sep 24 



Sep 09 

 Sep 20 

 Oct 02 



Sep 17 

 Sep 29 

 Oct 14 



Sep 14 

 Sep 23 

 Oct 04 



Sep 10 

 Sep 20 

 Oct 03 



Sep 05 

 Sep 14 

 Sep 24 



Aug 27 

 Sep OS 

 Sep 17 



Sep 06 

 Sep 16 

 Sep 23 



Sep 02 

 Sep 14 

 Sep 23 



Aug 28 

 Sep 10 

 Sep 19 



Aug 27 

 Sep 07 

 Sep 18 



Sep 03 

 Sep 15 

 Sep 25 



Sep 09 

 Sep 20 

 Oct 03 



Sep 07 

 Sep 14 

 Sep 24 



Sep 03 

 Sep 14 

 Sep 23 



Sep 18 

 Sep 27 

 Oct 06 



Sep 05 

 Sep 20 

 Oct 03 



Sep 09 

 Sep 20 

 Oct 01 



Sep 19 

 Sep 27 

 Oct 09 



Sep 19 

 Sep 28 

 Oct 09 



Sep 24 

 Oct 06 

 Oct 20 



Oct 06 

 Oct 17 

 Nov 06 



Sep 28 

 Oct 10 

 Oct 21 



Sep 23 

 Oct 05 

 Oct IS 



Sep 21 

 Sep 28 

 Oct OS 



Sep 12 

 Sep 21 

 Oct 01 



Sep 22 

 Sep 29 

 Oct OS 



Sep 19 

 Sep 30 

 Oct 09 



Sep 15 

 Sep 25 

 Oct 01 



Sep 09 

 Sep 20 

 Oct 03 



Sep 19 

 Oct 01 

 Oct 13 



Sep 21 

 Oct 07 

 Oct 21 



Sep 20 

 Sep 25 

 Oct 10 



Sep 19 

 Sep 24 

 Oct 09 



Oct 02 

 Oct 14 

 Oct 21 



Sep 16 

 Oct 03 

 Oct 20 



Sep 23 

 Oct 05 

 Oct 17 



102 

 133 

 159 



113 



133 

 157 



125 

 149 

 175 



134 

 159 

 205 



133 

 156 

 178 



125 

 151 



173 



123 

 140 

 158 



92 



lis 



145 



116 

 140 

 162 



103 

 133 

 151 



107 

 134 

 149 



82 

 115 

 142 



113 



133 

 160 



111 

 146 

 172 



114 

 132 

 160 



111 

 133 

 154 



144 

 168 

 181 



110 

 143 

 175 



125 

 149 

 170 



75 

 101 

 137 



87 



112 

 138 



95 

 124 

 154 



106 

 136 



173 



111 

 133 

 157 



97 

 127 

 153 



96 

 117 

 140 



64 



94 



124 



96 



122 



142 



75 

 109 

 132 



80 

 110 

 128 



58 

 91 

 122 



87 

 112 

 138 



91 

 122 

 149 



91 

 114 

 139 



78 

 112 

 135 



126 

 145 

 162 



89 

 117 

 152 



100 

 126 

 153 



48 



69 



114 



61 



90 

 119 



65 

 99 



132 



78 

 113 

 141 



S9 

 110 

 135 



6S 

 102 

 134 



69 



94 

 122 



37 



70 



103 



77 

 104 

 122 



47 



84 



113 



53 



87 



106 



34 



67 



103 



61 



90 



115 



71 



99 



126 



68 



97 



119 



45 



90 



117 



107 

 121 

 142 



68 



92 



128 



76 

 103 

 135 



Harlem 



Blaine 



36 May 17 JunOS Jun 24 Aug 18 Sep 04 Sep 22 119 91 63 



32 May 06 May 23 JunOS Sep 02 Sep 15 Sep 28 137 114 91 



28 Apr 23 May OS May 24 Sep 09 Sep 24 Oct 08 157 138 118 



This table gives the probability of a later date in the spring and an earlier date in the fall of the occurrence of temperatures as cold, or colder, than 36, 32, and 28 



degrees Fahrenheit and the probable length of the freeze-free period relative the same temperature threshold. 



