| < December >
|Normal Max/ High Temperature
|Min/ Low Temperature
|Average Daylight per day
|Sun altitude at solar noon on the 21st day.
- The average temperature in Helena, Mt in December is cold at -6 °C (21.2 °F).
- Afternoons can be slightly cold with average high temperatures reaching -0.4 °C (31.3 °F).
- Overnight temperatures are generally very cold with an average low of -11.6 °C (11.1 °F).
- In December the range/ variation of daily mean temperatures is 11.2 °C (20.2 °F).
- The weather in December is droughty. A paltry 15mm (0.6in) of H2O falls.
- The shortest day is 8:33 long and the longest day is 8:48 long with an average length of 8:37.
Check the distance to and compare the Helena, Mt December averages with somewhere beginning with:
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Weather Trend Graph for December in Helena, Mt, Usa
Navigate to December Weather in Locations Surrounding Helena, Mt:
- Big Trout Lake, On, Canada - 416.7 kms (258.9 miles) N
- Lethbridge (Cda), Ab, Canada - 349.5 kms (217.2 miles) N
- Libby, Mt, Usa - 333 kms (206.9 miles) NW
- Kalispell, Montana, Usa - 254.5 kms (158.1 miles) NW
- Priest River, Id, Usa - 409.1 kms (254.2 miles) WNW
- Missoula, Mt, Usa - 162.6 kms (101 miles) WNW
- Lewiston, Id, Usa - 384.7 kms (239.1 miles) W
- Dillon, Mt, Usa - 194.1 kms (120.6 miles) SSW
- Pocatello, Idaho, Usa - 412.3 kms (256.2 miles) S
- Medicine Hat, Ab, Canada - 391.7 kms (243.4 miles) NNE
- Sachs Harbour, Nt, Canada - 322.7 kms (200.5 miles) NNE
- Manyberries, Alberta, Canada - 302.3 kms (187.9 miles) NNE
- Great Falls, Montana, Usa - 109.3 kms (67.9 miles) NNE
- Augusta, Mt, Usa - 44.5 kms (27.6 miles) N
- Billings/ Logan, Mt, Usa - 281.2 kms (174.7 miles) ESE
- Crow Agency, Mt, Usa - 367.1 kms (228.1 miles) ESE
- Red Lodge, Mt, Usa - 264.4 kms (164.3 miles) SE
- Livingston, Mt, Usa - 194.1 kms (120.6 miles) SSE
- Yellowstone Park, Wyoming, Usa - 207.7 kms (129.1 miles) SSE