Helena, Montana Weather Forecast

Local

Helena, MT, US

46.59271, -112.03611

Normals for December

	Temp ( °F °C )			Precip ( " mm )		Degree Days
	Min	Max	Avg	MTD	YTD	Heating	Cooling
1	18 -8	36 2	27 -3	0.02 undefined	10.96 undefined	37.9	0
2	18 -8	36 2	27 -3	0.04 undefined	10.98 undefined	38.2	0
3	17 -8	36 2	27 -3	0.05 undefined	10.99 undefined	38.5	0
4	17 -8	35 2	26 -3	0.07 undefined	11.01 undefined	38.9	0
5	17 -8	35 2	26 -3	0.08 undefined	11.02 undefined	39.2	0
6	16 -9	35 1	26 -4	0.1 undefined	11.04 undefined	39.5	0
7	16 -9	34 1	25 -4	0.11 undefined	11.05 undefined	39.8	0
8	16 -9	34 1	25 -4	0.13 undefined	11.07 undefined	40.1	0
9	16 -9	34 1	25 -4	0.14 undefined	11.08 undefined	40.4	0
10	15 -9	33 1	24 -4	0.16 undefined	11.1 undefined	40.7	0
11	15 -9	33 1	24 -4	0.17 undefined	11.11 undefined	41	0
12	15 -10	33 1	24 -5	0.18 undefined	11.12 undefined	41.2	0
13	14 -10	33 0	24 -5	0.2 undefined	11.14 undefined	41.5	0
14	14 -10	32 0	23 -5	0.21 undefined	11.15 undefined	41.7	0
15	14 -10	32 0	23 -5	0.22 undefined	11.16 undefined	41.9	0
16	14 -10	32 0	23 -5	0.24 undefined	11.18 undefined	42.1	0
17	14 -10	32 0	23 -5	0.25 undefined	11.19 undefined	42.3	0
18	13 -10	32 0	23 -5	0.27 undefined	11.21 undefined	42.5	0
19	13 -10	32 0	22 -5	0.28 undefined	11.22 undefined	42.7	0
20	13 -11	31 0	22 -5	0.3 undefined	11.24 undefined	42.8	0
21	13 -11	31 0	22 -6	0.31 undefined	11.25 undefined	42.9	0
22	13 -11	31 0	22 -6	0.33 undefined	11.27 undefined	43.1	0
23	13 -11	31 0	22 -6	0.34 undefined	11.28 undefined	43.2	0
24	13 -11	31 -1	22 -6	0.36 undefined	11.3 undefined	43.2	0
25	12 -11	31 -1	22 -6	0.37 undefined	11.31 undefined	43.3	0
26	12 -11	31 -1	22 -6	0.39 undefined	11.33 undefined	43.4	0
27	12 -11	31 -1	22 -6	0.4 undefined	11.34 undefined	43.4	0
28	12 -11	31 -1	22 -6	0.42 undefined	11.36 undefined	43.4	0
29	12 -11	31 -1	22 -6	0.43 undefined	11.37 undefined	43.5	0
30	12 -11	31 -1	22 -6	0.45 undefined	11.39 undefined	43.5	0
31	12 -11	31 -1	22 -6	0.46 undefined	11.4 undefined	43.4	0