Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
The advent of January in Helena brings an average high-temperature of a still subzero cold 30.4°F (-0.9°C), exhibiting minor difference from the previous month. Throughout the month of January, Helena reports a steady low-temperature average of 16°F (-8.9°C).Humidity
With an average relative humidity of 85%, January is the most humid month.Rainfall
January and December are months with the least rain in Helena when the rain falls for 8.4 days and typically aggregates up to 0.63" (16mm) of rain.Snowfall
January through May, September through December are months with snowfall. In Helena, in January, snow falls for 13.3 days, with typically accumulated 4.41" (112mm) of snow. Throughout the year, in Helena, there are 80.4 snowfall days, and 34.88" (886mm) of snow is accumulated.Daylight
The average length of the day in January is 9h and 4min.On the first day of January in Helena, Montana, sunrise is at 8:12 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:53 am and sunset at 5:29 pm MST.
Sunshine
The month with the least sunshine in Helena is January, with an average of 5.6h of sunshine.UV index
In Helena, the average daily maximum UV index in January is 2. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 2 in January translates into these instructions:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is January in Helena?
What is the most humid month in Helena?
What is the average humidity in January in Helena?
What is the driest month in Helena?
How many days does it rain in January in Helena?
How much does it snow in Helena in January?
What is the average length of the day in January in Helena?
When is the sunrise / sunset in January in Helena?
What is the month with the least sunshine in Helena?
How many hours of sunshine does Helena have in January?
What is the UV index intensity in January in Helena?
Average temperature in January
Helena, MT
- Average high temperature in January: 30.4°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is December (27.7°F).
- Average low temperature in January: 16°F
The month with the highest average low temperature is July (50.4°F).
The coldest month (with the lowest average low temperature) is December (14.2°F).
Average pressure in January
Helena, MT
- Average pressure in January: 30.18"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in January
Helena, MT
- Average wind speed in January: 7mph
The windiest month (with the highest average wind speed) is November (7.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in January
Helena, MT
- Average humidity in January: 85%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are July and August (46%).
Average rainfall in January
Helena, MT
- Average rainfall in January: 0.63"
The wettest month (with the highest rainfall) is June (2.01").
The driest months (with the least rainfall) are January and December (0.63").
Average rainfall days in January
Helena, MT
- Average rainfall days in January: 8.4 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is November (7 days).
Average snowfall in January
Helena, MT
- Average snowfall in January: 4.41"
The month with the highest snowfall is February (6.18").
The months with the least snowfall are June, July and August (0").
Average snowfall days in January
Helena, MT
- Average snowfall days in January: 13.3 days
The month with the highest number of snowfall days is February (16.2 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in January /
Average sunshine in January
Helena, MT
- Average daylight in January: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in January: 5h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in January
Helena, MT
- Average sunshine days in January: 15.2 days
The month with the most sunshine days is July (20.5 days).
The month with the least sunshine days is April (9.8 days).
Average UV index in January
Helena, MT
- Average UV index in January: 2
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in January
Helena, MT
- Average cloud cover in January: 42
The month with the most cloud cover is February (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in January
Helena, MT
- Average visibility in January: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
Helena, Montana, USA
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