Upper Colorado River Basin December 2021 Average Temperature Rankings
1901-2000
Degrees Fahrenheit
1
28.3
23.0
5.3
117
13
1909
1980
2020
2017
top-tenth
1995
2
33.8
27.5
6.3
128
2
1895
2017
2020
2017
top-tenth
3
37.6
33.5
4.1
127
3
1898
1950,2017
2020
2017
top-tenth
1933
4
43.4
39.2
4.2
129
1
1898,1912
2021
2020
2021
highest
5
48.0
44.3
3.7
129
1
1912
2021
2020
2021
highest
6
52.0
48.1
3.9
129
1
1912
2021
2020
2021
highest
7
54.1
49.9
4.2
129
1
1912
2021
2020
2021
highest
8
54.0
50.0
4.0
129
1
1912
2021
2020
2021
highest
9
52.9
49.1
3.8
129
1
1912
2021
2020
2021
highest
10
51.1
47.5
3.6
128
2
1912
2012
2020
2012
top-tenth
11
48.8
45.5
3.3
126
4
1912
2017
2020
2017
top-tenth
12
46.8
43.4
3.4
126
4
1895,1912
2012
2020
2017
top-tenth
18
48.1
45.0
3.1
125
4
1912
1934
2020
2018
top-tenth
24
46.4
43.4
3.0
126
3
1913
2018
2020
2018
top-tenth
2015,2016
36
45.6
43.4
2.2
118
10
1899,1913
2017
2020
2019
top-tenth
2005,2007,2015,2023
48
45.8
43.4
2.4
120
7
1898
2018
2016
2020
top-tenth
60
46.1
43.4
2.7
124
2
1899
2018
2020
2019
top-tenth
2019