January weather forecast and climate
Simpson, MT

January, the same as December, in Simpson, Montana, is another subzero cold winter month, with average temperature varying between 14.4°F (-9.8°C) and 27.1°F (-2.7°C).

Temperature

January and December, with an average high-temperature of 27.1°F (-2.7°C), are the coldest months.

Humidity

With an average relative humidity of 83%, January is the most humid month in Simpson.

Rainfall

In Simpson, it is raining for 4.5 days, with typically 0.43" (11mm) of accumulated precipitation. In Simpson, during the entire year, the rain falls for 98.7 days and collects up to 8.23" (209mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall in Simpson. In Simpson, during 10.4 snowfall days, 2.6" (66mm) of snow is typically accumulated. In Simpson, during the entire year, snow falls for 53.5 days, and aggregates up to 14.25" (362mm) of snow.

Daylight

In Simpson, the average length of the day is 8.8h.

Sunshine

In January, the average sunshine in Simpson is 5.6h.

UV index

Months with the lowest UV index in Simpson are January through March, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from the exposure to the Sun's UV radiation for the ordinary person.
Note: In January, the average maximum UV index of 2 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What are the coldest months in Simpson?

January and December, with an average high-temperature of 27.1°F (-2.7°C), are the coldest months.

What is the temperature in January in Simpson?

In January, in Simpson, Montana, the average high-temperature is 27.1°F (-2.7°C), and the average low-temperature is 14.4°F (-9.8°C).

What is the most humid month in Simpson?

With an average relative humidity of 83%, January is the most humid month in Simpson.

What is the average humidity in January in Simpson?

In January, the average relative humidity in Simpson is 83%.

How much does it rain in Simpson in January?

In Simpson, in January, it is raining for 4.5 days, with typically 0.43" (11mm) of accumulated precipitation.

How many days does it snow in January in Simpson?

In Simpson, during January, snow falls for 10.4 days and regularly aggregates up to 2.6" (66mm) of snow.

How many hours of daylight does Simpson have in January?

The average length of the day in January is 8.8h.

How long on average sun shines in January in Simpson?

In Simpson, the average sunshine in January is 5.6h.

What are the months with the lowest UV index in Simpson?

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Simpson.

How high is the UV index in January in Simpson?

The average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a low health risk from the exposure to the Sun's UV radiation.
Average temperature in January - Simpson, MT
  • Average high temperature in January: 27.1°F

The warmest month (with the highest average high temperature) is July (82.8°F).
Months with the lowest average high temperature are January and December (27.1°F).

  • Average low temperature in January: 14.4°F

The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is February (13.5°F).

Average pressure in January - Simpson, MT
  • Average pressure in January: 30.12"

Months with the highest atmospheric pressure are January and February (30.12").
The month with the lowest atmospheric pressure is June (29.84").

Average wind speed in January - Simpson, MT
  • Average wind speed in January: 10.1mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).

Average humidity in January - Simpson, MT
  • Average humidity in January: 83%

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is August (40%).

Average rainfall in January - Simpson, MT
  • Average rainfall in January: 0.43"

The wettest month (with the highest rainfall) is June (1.5").
The driest month (with the least rainfall) is December (0.31").

Average rainfall days in January - Simpson, MT
  • Average rainfall days in January: 4.5 days

The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is February (4 days).

Average snowfall in January - Simpson, MT
  • Average snowfall in January: 2.6"

The month with the highest snowfall is February (2.72").
Months with the least snowfall are June, July and August (0").

Average snowfall days in January - Simpson, MT
  • Average snowfall days in January: 10.4 days

The month with the highest number of snowfall days is February (11 days).
Months with the least snowfall days are June, July and August (0 days).

Average daylight in January / Average sunshine in January - Simpson, MT
  • Average daylight in January: 8.8h

The month with the longest days is June (Average daylight: 16.1h).
The month with the shortest days is December (Average daylight: 8.3h).

  • Average sunshine in January: 5.6h

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is February (Average sunshine: 5.3h).

Average sunshine days in January - Simpson, MT
  • Average sunshine days in January: 17.8 days

The month with the most sunshine days is September (20.3 days).
The month with the least sunshine days is April (12.8 days).

Average UV index in January - Simpson, MT
  • Average UV index in January: 2

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January, February, March, October, November and December (UV index 2).

Average cloud cover in January - Simpson, MT
  • Average cloud cover in January: 42

The month with the most cloud cover is February (Cloud cover 46).
Months with the least cloud cover are July and August (Cloud cover 16).

Average visibility in January - Simpson, MT
  • Average visibility in January: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).