Helena
Montana, USA
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
Helena, MT

The State Capital building of Montana in Helena city, set on a beautiful natural park
The State Capital building of Montana in Helena city, set on a beautiful natural park
January in Helena, Montana, is a cold winter month, with average temperature ranging between min 12.9°F (-10.6°C) and max 33.3°F (0.7°C).

Temperature

In Helena, the average high-temperature is almost the same as in December - a cold 33.3°F (0.7°C). In January, the average low-temperature is 12.9°F (-10.6°C).

Humidity

The average relative humidity in January is 66%.

Rainfall

In Helena, Montana, it is raining for 6.2 days, with typically 0.4" (9.1mm) of accumulated precipitation. Throughout the year, in Helena, there are 91.6 rainfall days, and 11.2" (284.9mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Helena are January through May, August through December. In January, in Helena, Montana, it is snowing for 5.6 days. Throughout January, 6.2" (157.5mm) of snow is accumulated. Throughout the year, in Helena, there are 32.8 snowfall days, and 38.1" (967.8mm) of snow is accumulated.

Daylight

The average length of the day in January is 9.1h.

Sunshine

The average sunshine in January is 3.9h.

UV index

January, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to the UV radiation for ordinary individuals.
Note: The average daily UV index of 1 transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in January in Helena?

In January, in Helena, Montana, the average high-temperature is 33.3°F (0.7°C), and the average low-temperature is 12.9°F (-10.6°C).

What is the average humidity in January in Helena?

The average relative humidity in January in Helena, Montana, is 66%.

How many days does it rain in January in Helena?

In Helena, in January, it is raining for 6.2 days, with typically 0.4" (9.1mm) of accumulated precipitation.

How much does it snow in Helena in January?

In Helena, in January, during 5.6 snowfall days, 6.2" (157.5mm) of snow is typically accumulated.

How many hours of daylight does Helena have in January?

In Helena, the average length of the day in January is 9.1h.

How long on average sun shines in January in Helena?

In January, the average sunshine in Helena is 3.9h.

When is the lowest UV index in Helena?

January, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Helena.

What is the UV index intensity in January in Helena?

In Helena, the average daily maximum UV index in January is 1. A UV Index value of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in January - Helena, MT
  • Average high temperature in January: 33.3°F

The warmest month (with the highest average high temperature) is July (85.7°F).
The month with the lowest average high temperature is December (31.7°F).

  • Average low temperature in January: 13°F

The month with the highest average low temperature is July (54.3°F).
The coldest month (with the lowest average low temperature) is December (11.9°F).

Average humidity in January - Helena, MT
  • Average humidity in January: 66%

The month with the highest relative humidity is December (68.1%).
The month with the lowest relative humidity is July (46.4%).

Average rainfall in January - Helena, MT
  • Average rainfall in January: 0.4"

The wettest month (with the highest rainfall) is June (2.1").
The driest month (with the lowest rainfall) is February (0.3").

Average rainfall days in January - Helena, MT
  • Average rainfall days in January: 6.2 days

The month with the highest number of rainy days is June (11.2 days).
The month with the lowest number of rainy days is February (5.9 days).

Average snowfall in January - Helena, MT
  • Average snowfall in January: 6.2"

The month with the highest snowfall is December (7.3").
Months with the lowest snowfall are June and July (0").

Average snowfall days in January - Helena, MT
  • Average snowfall days in January: 5.6 days

The month with the highest number of snowfall days is December (6 days).
The month with the lowest number of snowfall days is July (0 days).

Average daylight in January / Average sunshine in January - Helena, MT
  • Average daylight in January: 9.1h

The month with the longest days is June (Average daylight: 15.8h).
The month with shortest days is December (Average daylight: 8.6h).

  • Average sunshine in January: 3.9h

The month with most sunshine is July (Average sunshine: 11.9h).
The month with least sunshine is December (Average sunshine: 3.2h).

Average UV index in January - Helena, MT
  • Average UV index in January: 1

The month with the highest UV index is July (UV index 9).
Months with the lowest UV index are January, November and December (UV index 1).