Perry's Perennial Pages

Yearly Climate Summary

Milton, Vermont Perennial Trials, USDA zone 4a

Dr. Leonard Perry, Horticulture Professor, University of Vermont




 (begun Spring 2010)

2010

2011 2012 2013 2014 2015
Winter





Lowest temperature, F

na

-22 -20 -22 -25 -27

Lowest temperature date

na

1/24 1/16 1/3 1/22 2/24

Number of days =/<-10 F

na

5 2 4 10 22
Number of days =/<-20 F na 1 1 1 4 5

Last spring frost date (=/<32F)

5/17

4/20 5/18 5/27 5/8 5/23

First killing frost date (=/<28F)

10/12

10/7 10/13 10/29 9/19 10/15

Frost-free season, days

146

170 148 155 134 126

1Annual snowfall, inches

107

128 38 82 87 83
Snowfall above/(below) 15yr. average +27 +38 (52) (8) (2) (7)
Summer (monthly data below)





Mean summer high, F

80

84 85 80 80 81

Mean summer low, F

58

54 52 55 53 55

Highest temperature, F

103

100 101 98 93 97

Highest temperature date

7/7

7/22 6/21 7/17 7/1 7/29

2Number of days =/> 90 F

18 (20%)

24 (25%) 28 (30%) 12 (13%)   5 (5%)   9 (10%)

2Number of days =/<60 F

51 (55%)

79 (86%) 75 (82%) 60 (65%)   77 (84%)   58  (63%)

2Number of days  =/<50 F

14 (15%)

27 (29%) 34 (37%) 27 (29%)   32 (34%)   19 (21%)
Yearly





1Annual precipitation, inches

41

51 33 45 37 38
Precip. above/below average +4 +14 (4) +8 0 +1

1Burlington NOWData/NOAA online,  rainfall Jan-Dec, snowfall Jul-Jun

2Summer= Jun, Jul, Aug; 92 days total

 

 


Summer 2015 June July August

Mean high, F

76 83
82

Mean low, F

50 56
58
  Mean, F   62   69
  68

Lowest temperature, F (date)

33 (7) 42 (3)
50 (29)

Highest temperature, F (date)

86 (30) 97 (29)
93 (17,18)

Number of days =/> 90 F

0 5
4

Number of days  =/<60 F

29 9
20

Number of days =/<50 F

14 3
2
largest degree day range (date) 46 (4) 40 (6)
33 (10)


Summer 2014 June July August

Mean high, F

79 82 78

Mean low, F

52 55 53

Lowest temperature, F (date)

39 (1,21) 44 (11) 45 (20)

Highest temperature, F (date)

90 (28,29) 93 (1) 89 (25)

Number of days =/> 90 F

2 3 0

Number of days  =/<60 F

25 24 28

Number of days =/<50 F

12 11 9
largest degree day range (date) 44 (23) 43 (12) 40 (20)
soil (2in. depth)--high  79 na na
soil--low 52 na na
soil--average 66 na na


Summer 2013  June July August

Mean high, F

73 85 82

Mean low, F

55 58 53

Lowest temperature, F (date)

35 (20) 39 (25) 41 (24)

Highest temperature, F (date)

92 (1) 98 (17) 91 (21,22)

Number of days =/> 90 F

1 7 4

Number of days  =/<60 F

22 16 22

Number of days =/<50 F

10 6 11
largest degree day range (date) 40 (20) 43 (27) 42 (6,24)
soil (2in. depth)--high  70 na na
soil--low 53 na na
soil--average 61 na na


Summer 2012  June July August

Mean high, F

80 88 87

Mean low, F

51 53 53

Lowest temperature, F

40 (14,15) 40 (20) 38 (19)

Highest temperature, F

101 (21) 100 (14) 99 (4)

Number of days =/> 90 F

7 13 8

Number of days =/<60 F

24 25 26

Number of days =/<50 F

15 10 9
largest degree day range (date) 48 (24) 51 (12) 47 (22)
soil (2in. depth)--high 80 79 73
soil--low 55 59 58
soil--average 67 71 68


Summer 2011  June July August

Mean high, F

80 89 83

Mean low, F

52 55 54

Lowest temperature, F

40 46 45

Highest temperature, F

96 100 95

Number of days =/> 90 F

4 16 4

Number of days  =/<60 F

28 24 27

Number of days  =/<50 F

11 8 8
largest degree day range (date) 48 (6/7) 47 (7/16) 43 (8/5)
soil (2in. depth)--high 77 81 77
soil--low 56 60 58
soil--average 67 70 67



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