May weather forecast and climate
Grass Range, MT

Weather in May

The last month of the spring, May, is a mild month in Grass Range, Montana, with average temperature ranging between min 40.1°F (4.5°C) and max 58.5°F (14.7°C).

Temperature

In Grass Range, Montana, the average high-temperature in May increases, from a chilly 47.8°F (8.8°C) in April, to a moderate 58.5°F (14.7°C). In Grass Range, in May, the average low-temperature is 40.1°F (4.5°C).

Humidity

In Grass Range, Montana, the average relative humidity in May is 65%.

Rainfall

The month with the most rainfall in Grass Range is May when the rain falls for 19.3 days and typically aggregates up to 3.39" (86mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall in Grass Range, Montana. In Grass Range, during May, snow falls for 2.4 days and regularly aggregates up to 2.48" (63mm) of snow. In Grass Range, during the entire year, snow falls for 83.4 days, and aggregates up to 45.51" (1156mm) of snow.

Daylight

In May, the average length of the day is 15.1h.

Sunshine

In May, the average sunshine in Grass Range is 10h.

UV index

In May, the average daily maximum UV index in Grass Range is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 4 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in May in Grass Range?

In Grass Range, Montana, in May, the average high-temperature is 58.5°F (14.7°C), and the average low-temperature is 40.1°F (4.5°C).

What is the average humidity in May in Grass Range?

In Grass Range, the average relative humidity in May is 65%.

How much does it rain in Grass Range in May?

In Grass Range, in May, during 19.3 rainfall days, 3.39" (86mm) of precipitation is typically accumulated.

What is the wettest month in Grass Range?

May is the month with the most rainfall in Grass Range, Montana. Rain falls for 19.3 days and accumulates 3.39" (86mm) of precipitation.

How much does it snow in Grass Range in May?

In Grass Range, Montana, in May, snow falls for 2.4 days, with typically accumulated 2.48" (63mm) of snow.

What is the average length of the day in May in Grass Range?

In Grass Range, the average length of the day in May is 15.1h.

How long on average sun shines in May in Grass Range?

In Grass Range, the average sunshine in May is 10h.

How high is the UV index in May in Grass Range?

In Grass Range, Montana, the average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in May
Grass Range, MT

Average temperature in May - Grass Range, MT
  • Average high temperature in May: 58.5°F

The warmest month (with the highest average high temperature) is July (78.8°F).
Months with the lowest average high temperature are February and December (29.1°F).

  • Average low temperature in May: 40.1°F

The month with the highest average low temperature is August (54.5°F).
The coldest month (with the lowest average low temperature) is February (15.3°F).

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Average pressure in May
Grass Range, MT

Average pressure in May - Grass Range, MT
  • Average pressure in May: 29.92"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is June (29.85").

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Average wind speed in May
Grass Range, MT

Average wind speed in May - Grass Range, MT
  • Average wind speed in May: 8.8mph

The windiest months (with the highest average wind speed) are January, April and October (9.9mph).
The calmest month (with the lowest average wind speed) is August (7.4mph).

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Average humidity in May
Grass Range, MT

Average humidity in May - Grass Range, MT
  • Average humidity in May: 65%

The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is August (47%).

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Average rainfall in May
Grass Range, MT

Average rainfall in May - Grass Range, MT
  • Average rainfall in May: 3.39"

The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is December (0.71").

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Average rainfall days in May
Grass Range, MT

Average rainfall days in May - Grass Range, MT
  • Average rainfall days in May: 19.3 days

The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (5.4 days).

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Average snowfall in May
Grass Range, MT

Average snowfall in May - Grass Range, MT
  • Average snowfall in May: 2.48"

The month with the highest snowfall is April (9.13").
Months with the least snowfall are July and August (0").

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Average snowfall days in May
Grass Range, MT

Average snowfall days in May - Grass Range, MT
  • Average snowfall days in May: 2.4 days

The month with the highest number of snowfall days is February (15.2 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
Grass Range, MT

Average daylight in May / Average sunshine in May - Grass Range, MT
  • Average daylight in May: 15.1h

The month with the longest days is June (Average daylight: 15.8h).
The month with the shortest days is December (Average daylight: 8.6h).

  • Average sunshine in May: 10h

The month with the most sunshine is July (Average sunshine: 11.8h).
The month with the least sunshine is February (Average sunshine: 5.5h).

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Average sunshine days in May
Grass Range, MT

Average sunshine days in May - Grass Range, MT
  • Average sunshine days in May: 8.9 days

The month with the most sunshine days is September (19.3 days).
The month with the least sunshine days is April (8.3 days).

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Average UV index in May
Grass Range, MT

Average UV index in May - Grass Range, MT
  • Average UV index in May: 4

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

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Average cloud cover in May
Grass Range, MT

Average cloud cover in May - Grass Range, MT
  • Average cloud cover in May: 36

The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 16).

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Average visibility in May
Grass Range, MT

Average visibility in May - Grass Range, 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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