-30-20 -10
0 10 20 30
Tem
pera
ture
( C
) 1
D
DEC JAN FEB
MAR APR MAY
JUN JUL AUG
SEP OCT NOV
J F M A M J J A S O N
10
100
1000
Prec
ipita
tion
(mm
) 20 30 40 50
0
50
0
50
0
50
0
50
0
50
0
50
0
50
0
50
Maximum Temperature (C)
0 10 20 30 40Temperature of Warmest Month (C)
-75 -60 -45 -30 -15 0Minimum Temperature (C)
-30 -20 -10 0 10 20Temperature of Coldest Month (C)
-20 -10 0 10 20Annual Temperature (C)
0 1 2 3 4 5 6 7Growing Degree Days on 5C Base X 1000
10 100 1000 10000Annual Precipitation (mm)
0.0 0.2 0.4 0.6 0.8 1.0Actual Evaporation/Potential Evaporation
Perc
ent o
f Tot
al N
umbe
r of O
ccur
renc
es o
f Tax
on
Prec
ipita
tion
(mm
)
10
1
1
1
100
1000
10
100
1000
10
100
1000
1
10
100
1000
Temperature (C) -30 -10 10 30 0 -30 -10 10 30 0 -30 -10 10 30 0
0 10 20 30 40 10
100
1000
10000
July Temperature (C)
Distribution data forCanada and United States only
Annu
al P
reci
pita
tion
(mm
)
0 10 20 30 40
-30
-20
-10
0
10
20
July Temperature (C)
Janu
ary
Tem
pera
ture
( C
)
1 10 100 1000 1
10
100
1000
July Precipitation (mm)
Janu
ary
Prec
ipita
tion
(mm
)
0 2 4 6
Moisture IndexAE/PE: 0.85-1.0
WET
0 2 4 6
Moisture IndexAE/PE: 0.73-0.85
0 2 4 6
Moisture IndexAE/PE: 0.55-0.73
-30
-10
10
-20
0
20
30
0 2 4 6
Tem
pera
ture
of C
olde
st M
onth
( C
)
Growing Degree Days on 5C Base X 1000
Moisture IndexAE/PE: < 0.55
DRY
Annabsentpresent
Jan
40-30 -20 -10 0 10 20 30Jul
Temperature (C)
Ann
Jan
1 10 100 1000 10000Jul
Precipitation (mm)
40-30 -20 -10 0 10 20 30
0 2 31 4 5 6 7Growing Degree Days on 5C Base X 1000
0.0 0.2 0.4 0.6 0.8 1.0
USGS Professional Paper 1650G
Actual Evaporation/Potential Evaporation
Month
max
5%25%
median75%
95%
min
Temperature of Coldest Month (C)
Salix discolor Mhl.Accepted name: Salix discolor Muhl.
Number of grid points: 5471
Common name: pussy willow
Primary source(s): Little (1976, 1977)
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