Mullan Snowfall Totals & Accumulation Averages

How Often it Snows in Mullan

This first table lists monthly and yearly totals for amount of snow and how many days it snows at least 0.1 inches (0.25 centimetres).

Average total snowfall and days with fresh snow in Mullan

Days		Inches	Centi­metres
11.7	January	24.8	63.0
9.2	February	23.3	59.2
7.7	March	9.8	24.9
3.9	April	4.3	10.9
0.6	May	0.3	0.8
0.1	September	0.0	0.0
1.6	October	2.4	6.1
10.1	November	18.1	46.0
13.5	December	31.1	79.0
58.4	Year	114.1	289.8

These averages don't show how much the snowfall in Mullan varies from year to year.

In December, for instance, one in four years totals over 35.7 inches of snow. Another 25 percent of years receive at most 14 inches for the month.

Similarly in January, fresh snowfall in the heaviest years amounts to over 28 inches, while the lightest years get less than 11.6 inches.

New snow for February ranges from over 35.7 inches in heavy snowfall years to under 9.6 inches in light years.

When Mullan Has Its First & Last Snowfalls

The first snowfall of winter for Mullan usually arrives in November. Every few years, the snow starts flying in October. Although uncommon, September can also get a little snow.

The season's last snowfall most often happens in April. In one out of four years, it doesn't stop snowing until May.

Mullan is normally free of snow every year from June to August.

How Many Snowstorms Mullan Gets

Most days of snowfall in Mullan leave at least an inch of fresh snow. For 12 days a year on average, the amount of new snow totals three inches or more.

Snowstorms of over five inches a day normally occur five or six times annually. But major blizzards that dump ten inches or more in one day are rare events that don't happen every year.

Number of days per month and year on average in Mullan with a total snowfall of at least 1, 3, 5 or 10 inches

1 inch 2.5 cm	3 inches 7.6 cm		5 inches 12.7 cm	10 inches 25.4 cm
6.7	3.1	January	1.3	0.1
5.5	2.1	February	1.2	0.3
3.6	1.1	March	0.4	0.0
1.6	0.3	April	0.1	0.0
0.1	0.0	May	0.0	0.0
0.7	0.2	October	0.1	0.0
5.0	2.0	November	0.9	0.1
7.4	3.2	December	1.6	0.3
30.6	12.0	Year	5.6	0.8

How Much Snow Normally Accumulates in Mullan

For most of winter, Mullan has at least three inches of snow on the ground.

Snow mostly accumulates during January. Typically, on 20 days in January and another 12 in December and 15 in February, the snow covering Mullan gets to ten or more inches deep.

Average total days per month and year in Mullan with snow depth of at least 1, 3, 5 or 10 inches on the ground

1 inch 2.5 cm	3 inches 7.6 cm		5 inches 12.7 cm	10 inches 25.4 cm
29.1	27.9	January	27.2	20.1
23.3	21.7	February	19.7	15.3
16.3	14.8	March	12.8	8.6
1.1	0.4	April	0.3	0.0
0.1	0.0	May	0.0	0.0
1.1	0.5	October	0.3	0.0
15.0	9.2	November	6.3	2.3
29.7	25.7	December	21.6	11.8
115.7	100.2	Year	88.2	58.1