May weather forecast
Basin, MT

Weather in May

The last month of the spring, May, is a moderate month in Basin, Montana, with average temperature fluctuating between 58.5°F (14.7°C) and 35.2°F (1.8°C).

Temperature

In Basin, the average high-temperature in May increases, from a frosty 46.4°F (8°C) in April, to a mild 58.5°F (14.7°C). In Basin, the average low-temperature is 35.2°F (1.8°C).

Humidity

In May, the average relative humidity is 64%.

Rainfall

In May, the rain falls for 18.2 days. Throughout May, 2.36" (60mm) of precipitation is accumulated. In Basin, during the entire year, the rain falls for 133.7 days and collects up to 16.38" (416mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall in Basin, Montana. In May, it is snowing for 4.4 days. Throughout May, 2.64" (67mm) of snow is accumulated. Throughout the year, in Basin, there are 105.8 snowfall days, and 55.12" (1400mm) of snow is accumulated.

Daylight

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

Sunshine

In May, the average sunshine is 10.2h.

UV index

In Basin, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 4 in May interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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 Basin?

In May, the average relative humidity in Basin is 64%.

How many days does it rain in May in Basin?

In May, the rain falls for 18.2 days. Throughout May, 2.36" (60mm) of precipitation is accumulated.

How many days does it snow in May in Basin?

In May, in Basin, Montana, it is snowing for 4.4 days. Throughout May, 2.64" (67mm) of snow is accumulated.

How many hours of daylight does Basin have in May?

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

How long on average sun shines in May in Basin?

The average sunshine in May is 10.2h.

What is the UV index reading in May in Basin?

In May, the average daily maximum UV index in Basin, Montana, is 4. A UV Index of 3 to 5 symbolizes a medium health risk from unprotected exposure to the UV radiation.

Average temperature in May
Basin, MT

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

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is December (27°F).

  • Average low temperature in May: 35.2°F

The month with the highest average low temperature is August (48.6°F).
The coldest month (with the lowest average low temperature) is December (12.6°F).

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Average pressure in May
Basin, MT

Average pressure in May - Basin, MT
  • Average pressure in May: 29.95"

The month with the highest atmospheric pressure is January (30.19").
The month with the lowest atmospheric pressure is June (29.91").

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Average wind speed in May
Basin, MT

Average wind speed in May - Basin, MT
  • Average wind speed in May: 5.4mph

The windiest months (with the highest average wind speed) are January and November (6.5mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

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Average humidity in May
Basin, MT

Average humidity in May - Basin, MT
  • Average humidity in May: 64%

The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (46%).

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Average rainfall in May
Basin, MT

Average rainfall in May - Basin, MT
  • Average rainfall in May: 2.36"

The wettest month (with the highest rainfall) is June (2.68").
The driest month (with the least rainfall) is December (0.79").

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Average rainfall days in May
Basin, MT

Average rainfall days in May - Basin, MT
  • Average rainfall days in May: 18.2 days

The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is November (7.5 days).

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Average snowfall in May
Basin, MT

Average snowfall in May - Basin, MT
  • Average snowfall in May: 2.64"

The month with the highest snowfall is February (9.72").
Months with the least snowfall are July and August (0").

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Average snowfall days in May
Basin, MT

Average snowfall days in May - Basin, MT
  • Average snowfall days in May: 4.4 days

The month with the highest number of snowfall days is February (18 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
Basin, MT

Average daylight in May / Average sunshine in May - Basin, 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: 10.2h

The month with the most sunshine is July (Average sunshine: 11.7h).
Months with the least sunshine are January and December (Average sunshine: 5.6).

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Average sunshine days in May
Basin, MT

Average sunshine days in May - Basin, MT
  • Average sunshine days in May: 9.3 days

The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is February (8.5 days).

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Average UV index in May
Basin, MT

Average UV index in May - Basin, MT
  • Average UV index in May: 4

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).

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Average cloud cover in May
Basin, MT

Average cloud cover in May - Basin, MT
  • Average cloud cover in May: 34

The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 15).

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Average visibility in May
Basin, MT

Average visibility in May - Basin, MT
  • Average visibility in May: 6mi

Months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
Months with the lowest visibility are January, February, March and December (5mi).

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