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

May weather forecast and climate
Roundup, MT

May, the last month of the spring, in Roundup, is an agreeable month, with average temperature varying between 70.5°F (21.4°C) and 41.5°F (5.3°C).

Temperature

In May, the average high-temperature rises, from an enjoyable 61.3°F (16.3°C) in April, to an agreeable 70.5°F (21.4°C). In May, in Roundup, the average low-temperature is 41.5°F (5.3°C).

Rainfall

In Roundup, Montana, 2.3" (57.9mm) of precipitation is typically accumulated. During the entire year, Roundup aggregates up to 13.5" (343.1mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. May is the last month it regularly snows in Roundup. Throughout May, Roundup aggregates 0.1" (2.5mm) of snow. In Roundup, during the entire year, snow aggregates up to 22.3" (566.4mm).

Daylight

In May, the average length of the day is 15h.

What is the temperature in May in Roundup?

In May, in Roundup, the average high-temperature is 70.5°F (21.4°C), and the average low-temperature is 41.5°F (5.3°C).

How much does it rain in Roundup in May?

In Roundup, in May, 2.3" (57.9mm) of precipitation is typically accumulated.

What is the last month it snows in Roundup?

May is the last month it regularly snows. Throughout May, Roundup aggregates 0.1" (2.5mm) of snow.

How many hours of daylight does Roundup have in May?

In Roundup, the average length of the day in May is 15h.
Average temperature in May - Roundup, MT
  • Average high temperature in May: 70.6°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 May: 41.6°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 May - Roundup, MT
  • Average rainfall in May: 2.3"

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 May - Roundup, MT
  • Average snowfall in May: 0.1"

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 May - Roundup, MT
  • Average daylight in May: 15h

The month with the longest days is June (Average daylight: 15.8h).
The month with shortest days is December (Average daylight: 8.7h).