CLIMATE CHARTS
Roy, Montana
Latitude: 47.4869 Longitude: -108.8372
Elevation: 3085 feet (940.3 meters)
Monthly Data Table for Roy, Montana
Imperial Units
Statistic |
Units |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Maximum Temperature |
°F |
34.6 |
38.1 |
47.6 |
57.9 |
67.3 |
76.1 |
86.0 |
85.6 |
73.7 |
60.4 |
45.4 |
34.6 |
Minimum Temperature |
°F |
9.7 |
13.4 |
22.0 |
30.8 |
40.0 |
48.5 |
53.8 |
52.2 |
42.5 |
32.0 |
20.4 |
10.3 |
Heating Degree Days |
°F |
1328 |
1099 |
936 |
620 |
359 |
134 |
27 |
41 |
237 |
585 |
963 |
1319 |
Cooling Degree Days |
°F |
0 |
0 |
0 |
0 |
7 |
53 |
178 |
162 |
30 |
2 |
0 |
0 |
Precipitation |
in. |
0.36 |
0.30 |
0.68 |
1.11 |
2.77 |
2.35 |
1.76 |
1.26 |
1.15 |
0.85 |
0.41 |
0.49 |
Metric Units
Statistic |
Units |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Maximum Temperature |
°C |
1.4 |
3.4 |
8.7 |
14.4 |
19.6 |
24.5 |
30.0 |
29.8 |
23.2 |
15.8 |
7.4 |
1.4 |
Minimum Temperature |
°C |
-12.4 |
-10.3 |
-5.6 |
-0.7 |
4.4 |
9.2 |
12.1 |
11.2 |
5.8 |
0.0 |
-6.4 |
-12.1 |
Heating Degree Days |
°C |
738 |
611 |
520 |
344 |
199 |
74 |
15 |
23 |
132 |
325 |
535 |
733 |
Cooling Degree Days |
°C |
0 |
0 |
0 |
0 |
4 |
29 |
99 |
90 |
17 |
1 |
0 |
0 |
Precipitation |
cm. |
0.91 |
0.76 |
1.73 |
2.82 |
7.04 |
5.97 |
4.47 |
3.20 |
2.92 |
2.16 |
1.04 |
1.24 |