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The tables below display average monthly climate and weather indicators in Williston North Dakota.
Temperature by: Fahrenheit / Centigrade
| Williston Temperature |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Avg. Temperature |
-12.8 |
-8.8 |
-2.0 |
6.2 |
12.9 |
18.2 |
21.5 |
20.4 |
13.5 |
7.1 |
-2.7 |
-10.4 |
5.3 |
| Avg. Max Temperature |
-6.9 |
-2.9 |
4.1 |
13.2 |
20.2 |
25.6 |
29.3 |
28.5 |
21.2 |
14.5 |
3.3 |
-4.7 |
12.1 |
| Avg. Min Temperature |
-18.8 |
-14.8 |
-8.1 |
-0.8 |
5.7 |
10.8 |
13.6 |
12.3 |
5.8 |
-0.3 |
-8.7 |
-16.2 |
-1.7 |
| Days with Max Temp of 32 C or Higher |
0.0 |
0.0 |
0.0 |
< 0.5 |
1.0 |
3.0 |
8.0 |
9.0 |
2.0 |
< 0.5 |
0.0 |
0.0 |
23.0 |
| Days with Min Temp Below Freezing |
31.0 |
28.0 |
29.0 |
18.0 |
4.0 |
< 0.5 |
0.0 |
0.0 |
3.0 |
16.0 |
29.0 |
31.0 |
188 |
| | |
| Williston Heating and Cooling |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Heating Degree Days |
1739 |
1369 |
1135 |
654 |
316 |
115 |
26.0 |
76.0 |
294 |
626 |
1134 |
1606 |
9090 |
| Cooling Degree Days |
0.0 |
0.0 |
0.0 |
0.0 |
15.0 |
106 |
203 |
191 |
33.0 |
0.0 |
0.0 |
0.0 |
548 |
| | |
| Williston Precipitation |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Precipitation (inches) |
0.5 |
0.4 |
0.7 |
1.3 |
2.0 |
2.3 |
2.1 |
1.2 |
1.3 |
0.8 |
0.5 |
0.6 |
13.7 |
| Days with Precipitation 0.01 inch or More |
8.0 |
6.0 |
8.0 |
8.0 |
10.0 |
11.0 |
9.0 |
7.0 |
7.0 |
5.0 |
7.0 |
9.0 |
94.0 |
| Monthly Snowfall (inches) |
8.1 |
5.5 |
6.9 |
4.3 |
0.7 |
< 0.05 |
< 0.05 |
< 0.05 |
0.3 |
1.7 |
5.6 |
7.9 |
41.0 |
| | |
| Other Williston Weather Indicators |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Average Wind Speed |
9.6 |
9.8 |
10.2 |
11.1 |
11.1 |
10.3 |
9.3 |
9.5 |
9.8 |
10.0 |
9.1 |
9.5 |
9.9 |
| Clear Days |
6.0 |
6.0 |
7.0 |
6.0 |
6.0 |
8.0 |
12.0 |
11.0 |
10.0 |
9.0 |
6.0 |
7.0 |
93.0 |
| Partly Cloudy Days |
8.0 |
8.0 |
8.0 |
9.0 |
11.0 |
11.0 |
12.0 |
12.0 |
9.0 |
8.0 |
7.0 |
7.0 |
112 |
| Cloudy Days |
17.0 |
15.0 |
16.0 |
15.0 |
13.0 |
11.0 |
7.0 |
8.0 |
11.0 |
14.0 |
16.0 |
17.0 |
160 |
| Percent of Possible Sunshine |
51.0 |
57.0 |
61.0 |
60.0 |
62.0 |
66.0 |
74.0 |
73.0 |
67.0 |
59.0 |
44.0 |
48.0 |
60.0 |
| Avg. Relative Humidity |
58.0 |
77.0 |
77.0 |
72.5 |
65.0 |
65.0 |
65.5 |
63.0 |
63.5 |
65.5 |
68.5 |
74.5 |
77.0 |
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