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

January weather forecast and climate
Roundup, MT

January, like December, in Roundup, Montana, is a wintry winter month, with average temperature fluctuating between 39°F (3.9°C) and 15.4°F (-9.2°C).

Temperature

In January, the average high-temperature is relatively the same as in December - a still wintry 39°F (3.9°C). In Roundup, in January, the average low-temperature is 15.4°F (-9.2°C).

Rainfall

January and February are months with the least rain when 0.3" (8.6mm) of rain is typically aggregated.

Snowfall

January through May, October through December are months with snowfall. Months with the most snowfall in Roundup, Montana, are January and December, with an average 5.3" (134.6mm) of accumulated snow.

Daylight

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

What is the temperature in January in Roundup?

In January, in Roundup, the average high-temperature is 39°F (3.9°C), and the average low-temperature is 15.4°F (-9.2°C).

How much does it rain in Roundup in January?

During January, Roundup regularly aggregates up to 0.3" (8.6mm) of precipitation.

What is the driest month in Roundup?

January and February are months with the least rain when 0.3" (8.6mm) of rain is typically aggregated.

How much does it snow in Roundup in January?

In Roundup, in January, 5.3" (134.6mm) of snow is typically accumulated.

What is the snowiest month in Roundup?

Months with the most snowfall in Roundup, Montana, are January and December, with an average 5.3" (134.6mm) of accumulated snow.

How many hours of daylight does Roundup have in January?

In Roundup, Montana, the average length of the day in January is 9.1h.
Average temperature in January - Roundup, MT
  • Average high temperature in January: 39.1°F

The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is December (37.8°F).

  • Average low temperature in January: 15.5°F

The month with the highest average low temperature is July (55.5°F).
The coldest month (with the lowest average low temperature) is December (15.2°F).

Average rainfall in January - Roundup, MT
  • Average rainfall in January: 0.3"

The wettest month (with the highest rainfall) is June (2.6").
Driest months (with the lowest rainfall) are January and February (0.3").

Average snowfall in January - Roundup, MT
  • Average snowfall in January: 5.3"

Months with the highest snowfall are January and December (5.3").
Months with the lowest snowfall are June, July, August and September (0").

Average daylight in January - Roundup, 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: 8.7h).