Boise, Idaho September-April Average Temperature
Degrees Fahrenheit
1941-1952
-99
194104
45.1
2.2
194204
41.8
-1.1
194304
43.9
1.0
194404
43.0
0.1
194504
43.7
0.8
194604
43.5
0.6
194704
42.5
-0.4
194804
42.6
-0.3
194904
39.8
-3.1
195004
42.5
-0.4
195104
44.6
1.7
195204
41.2
-1.7