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

May weather forecast and climate
Billings, MT

The unique view of the forest of trees in the plains, on the sandstone bluffs in Billings, Montana, a beautiful cloudy sky above
The unique view of the forest of trees in the plains, on the sandstone bluffs in Billings, Montana, a beautiful cloudy sky above
The last month of the spring, May, is a comfortable month in Billings, Montana, with average temperature varying between 67.5°F (19.7°C) and 43.5°F (6.4°C).

Temperature

In Billings, the average high-temperature increases, from a moderate 57.6°F (14.2°C) in April, to an enjoyable 67.5°F (19.7°C). In May, in Billings, the average low-temperature is 43.5°F (6.4°C).

Humidity

In May, the average relative humidity is 54.9%.

Rainfall

May is the month with the most rainfall in Billings. Rain falls for 12 days and accumulates 2.2" (55.4mm) of precipitation.

Snowfall

Months with snowfall in Billings are January through May, September through December.

Daylight

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

Sunshine

In May, the average sunshine in Billings is 9.1h.

UV index

In Billings, the average daily maximum UV index is 7. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to the Sun's UV rays for the average person.
The daily maximum UV index of 7 interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in May in Billings?

In Billings, in May, the average high-temperature is 67.5°F (19.7°C), and the average low-temperature is 43.5°F (6.4°C).

What is the average humidity in May in Billings?

In Billings, the average relative humidity in May is 54.9%.

How many days does it rain in May in Billings?

In Billings, Montana, in May, it is raining for 12 days, with typically 2.2" (55.4mm) of accumulated precipitation.

What is the wettest month in Billings?

May is the month with the most rainfall in Billings. Rain falls for 12 days and accumulates 2.2" (55.4mm) of precipitation.

What is the last month it snows in Billings?

May is the last month it regularly snows. During 0.9 snowfall days, in May, Billings aggregates 2" (50.8mm) of snow.

What is the average length of the day in May in Billings?

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

How many hours of sunshine does Billings have in May?

In Billings, the average sunshine in May is 9.1h.

What is the UV index intensity in May in Billings?

In May, the average daily maximum UV index is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to the UV radiation.
Average temperature in May - Billings, MT
  • Average high temperature in May: 67.5°F

The warmest month (with the highest average high temperature) is July (86.8°F).
The month with the lowest average high temperature is December (35.2°F).

  • Average low temperature in May: 43.6°F

The month with the highest average low temperature is July (58.8°F).
Coldest months (with the lowest average low temperature) are January and December (17.8°F).

Average humidity in May - Billings, MT
  • Average humidity in May: 54.9%

The month with the highest relative humidity is December (60.9%).
The month with the lowest relative humidity is August (44.5%).

Average rainfall in May - Billings, MT
  • Average rainfall in May: 2.2"

The wettest month (with the highest rainfall) is May (2.2").
Driest months (with the lowest rainfall) are January, February and December (0.5").

Average rainfall days in May - Billings, MT
  • Average rainfall days in May: 12 days

The month with the highest number of rainy days is May (12 days).
The month with the lowest number of rainy days is August (6 days).

Average snowfall in May - Billings, MT
  • Average snowfall in May: 2"

The month with the highest snowfall is March (10.2").
Months with the lowest snowfall are June, July and August (0").

Average snowfall days in May - Billings, MT
  • Average snowfall days in May: 0.9 days

Months with the highest number of snowfall days are March and December (6.9 days).
Months with the lowest number of snowfall days are June, July and August (0 days).

Average daylight in May / Average sunshine in May - Billings, MT
  • Average daylight in May: 15h

The month with the longest days is June (Average daylight: 15.7h).
The month with shortest days is December (Average daylight: 8.7h).

  • Average sunshine in May: 9.1h

The month with most sunshine is July (Average sunshine: 11.5h).
The month with least sunshine is December (Average sunshine: 3.8h).

Average UV index in May - Billings, MT
  • Average UV index in May: 7

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