Summary
of
climatic
data
by
months
for
the
1987-88
crop
year
(September
to
August)
and
averages
for
the
period
1916-88
at
the
Northern
Agricultural
Research
Center,
Havre,
Montana.
Month
and
Year
Sept.
Oct.
1987
1987
Nov.
1987
Dec.
1987
Jan.
1988
Feb.
1988
Mar.
1988
Apr.
1988
May
June
1988
1988
July
1988
Aug.
1988
Total
Average
Growi
ng
Season
Precipitation
(Inches)
Current
Year
.87
.03
.05
.02
.30
.24
.40
Av.
1916
to
1987-88
1.21
.64
.40
.45
.44
.34
.56
.95
09
1.75
1.72
2.44
1.
13
1.35
.03
1.22
5.01
11.75
Mean
Temperature
(
F)
Current
Year
Av.
1916
to
1987-88
61.3
56.2
47.5
46.4
37.9
29.9
27.4
19.2
18.6
14.3
25.1
19.2
••8.5
>0
R
50.1
43.7
62.6
54.7
73.1
62.5
72.0
69.8
69.9
67.7
48.7
42.8
Last
killing
frost
in
spring*
1988
Av.
1916
to
1988-
First
killing
frost
in
fall*
1988
Av.
1916
to
1988-
May
3rd
May
14th
October
4th
September
20th
(27°)
(28°)
Frost
free
period
1988
Av.
1916
to
1988-
154
129
Days
Days
Maximum
summer
temperature-
Minimum
winter
temperature-
102
26
o
June
26th
on
below
zero
on
February
1st
*In
this
summary
32°
is
considered
a
killing
frost.
