May weather forecast
Colstrip, MT

Weather in May

The last month of the spring, May, is a comfortable month in Colstrip, Montana, with average temperature fluctuating between 44.2°F (6.8°C) and 64°F (17.8°C).

Temperature

In May, the average high-temperature increases, from a cool 53.8°F (12.1°C) in April, to a comfortable 64°F (17.8°C). The average low-temperature, in Colstrip, is 44.2°F (6.8°C).

Humidity

In May, the average relative humidity is 60%.

Rainfall

The month with the most rainfall in Colstrip is May when the rain falls for 16.8 days and typically aggregates up to 2.56" (65mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall. In Colstrip, snow falls for 1.3 days, with typically accumulated 0.55" (14mm) of snow. Throughout the year, in Colstrip, Montana, there are 55.2 snowfall days, and 23.5" (597mm) of snow is accumulated.

Daylight

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

Sunshine

The average sunshine in Colstrip is 9.9h.

UV index

The average daily maximum UV index in Colstrip is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.
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FAQ

What is the average humidity in May in Colstrip?

In May, the average relative humidity in Colstrip, Montana, is 60%.

What is the wettest month in Colstrip?

May is the month with the most rainfall. Rain falls for 16.8 days and accumulates 2.56" (65mm) of precipitation.

How much does it rain in Colstrip in May?

In Colstrip, Montana, in May, during 16.8 rainfall days, 2.56" (65mm) of precipitation is typically accumulated.

How much does it snow in Colstrip in May?

In Colstrip, Montana, in May, during 1.3 snowfall days, 0.55" (14mm) of snow is typically accumulated.

How many hours of daylight does Colstrip have in May?

The average length of the day in May in Colstrip is 15h.

How many hours of sunshine does Colstrip have in May?

In May, the average sunshine in Colstrip, Montana, is 9.9h.

How high is the UV index in May in Colstrip?

The average daily maximum UV index in May in Colstrip, Montana, is 5. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to the UV radiation.

Average temperature in May
Colstrip, MT

Average temperature in May - Colstrip, MT
  • Average high temperature in May: 64°F

The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is December (30.4°F).

  • Average low temperature in May: 44.2°F

The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (16°F).

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Average pressure in May
Colstrip, MT

Average pressure in May - Colstrip, MT
  • Average pressure in May: 29.91"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is June (29.84").

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Average wind speed in May
Colstrip, MT

Average wind speed in May - Colstrip, MT
  • Average wind speed in May: 9.6mph

The windiest month (with the highest average wind speed) is April (10mph).
The calmest months (with the lowest average wind speed) are July and August (7.8mph).

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Average humidity in May
Colstrip, MT

Average humidity in May - Colstrip, MT
  • Average humidity in May: 60%

The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (42%).

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Average rainfall in May
Colstrip, MT

Average rainfall in May - Colstrip, MT
  • Average rainfall in May: 2.56"

The wettest month (with the highest rainfall) is May (2.56").
The driest month (with the least rainfall) is December (0.47").

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Average rainfall days in May
Colstrip, MT

Average rainfall days in May - Colstrip, MT
  • Average rainfall days in May: 16.8 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (2.8 days).

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Average snowfall in May
Colstrip, MT

Average snowfall in May - Colstrip, MT
  • Average snowfall in May: 0.55"

The month with the highest snowfall is February (4.33").
Months with the least snowfall are July and August (0").

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Average snowfall days in May
Colstrip, MT

Average snowfall days in May - Colstrip, MT
  • Average snowfall days in May: 1.3 days

The month with the highest number of snowfall days is February (10.4 days).
Months with the least snowfall days are July and August (0 days).

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Average daylight in May /
Average sunshine in May
Colstrip, MT

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

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

  • Average sunshine in May: 9.9h

The month with the most sunshine is July (Average sunshine: 11.8h).
The month with the least sunshine is February (Average sunshine: 5h).

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Average sunshine days in May
Colstrip, MT

Average sunshine days in May - Colstrip, MT
  • Average sunshine days in May: 11.3 days

The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is May (11.3 days).

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Average UV index in May
Colstrip, MT

Average UV index in May - Colstrip, MT
  • Average UV index in May: 5

The month with the highest UV index is July (UV index 7).
Months with the lowest UV index are January, February, March, April, November and December (UV index 2).

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Average cloud cover in May
Colstrip, MT

Average cloud cover in May - Colstrip, MT
  • Average cloud cover in May: 35

The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 15).

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Average visibility in May
Colstrip, MT

Average visibility in May - Colstrip, MT
  • Average visibility in May: 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).

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