May weather forecast
Harlem, MT

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Weather in May

The last month of the spring, May, is an enjoyable month in Harlem, Montana, with an average temperature varying between 64°F (17.8°C) and 45°F (7.2°C).

Temperature

With the onset of May, Harlem's average high-temperature sees a rise, moving from April's cool 52.5°F (11.4°C) to a comfortable 64°F (17.8°C). Harlem, during the month of May, experiences an average low-temperature of 45°F (7.2°C).

Humidity

In Harlem, the average relative humidity in May is 55%.

Rainfall

In Harlem, during May, the rain falls for 13.2 days and regularly aggregates up to 1.42" (36mm) of precipitation. Throughout the year, there are 99.1 rainfall days, and 10.12" (257mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Harlem are January through May, September through December. May is the last month it regularly snows. During 0.6 snowfall days, in May, Harlem aggregates 0.35" (9mm) of snow. In Harlem, Montana, during the entire year, snow falls for 57.6 days and aggregates up to 21.69" (551mm) of snow.

Daylight

The average length of the day in May is 15h and 16min.
On the first day of May in Harlem, sunrise is at 5:53 am and sunset at 8:30 pm. On the last day of the month, sunrise is at 5:17 am and sunset at 9:08 pm MDT.

Sunshine

In May, the average sunshine is 10.4h.

UV index

In May, the average daily maximum UV index in Harlem is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: In May, the UV index of 4 transforms into the following advice:
Undertake precautions - Guarding against sun damage is counselled. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
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Frequently asked questions

What is the usual temperature for Harlem in May?

The average high-temperature, in May, in Harlem, is 64°F (17.8°C), while the average low-temperature is 45°F (7.2°C).

What is the average humidity in May in Harlem?

The average relative humidity in May is 55%.

How many days does it rain in May in Harlem?

In May, in Harlem, the rain falls for 13.2 days. Throughout May, 1.42" (36mm) of precipitation is accumulated.

What is the last month it snows in Harlem?

May is the last month it regularly snows in Harlem, Montana. During 0.6 snowfall days, in May, Harlem aggregates 0.35" (9mm) of snow.

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

In May, the average day length in Harlem is 15h and 16min.

What time are sunrise and sunset in May in Harlem?

On the first day of May, sunrise is at 5:53 am and sunset at 8:30 pm. On the last day of the month, sunrise is at 5:17 am and sunset at 9:08 pm MDT.

How long on average sun shines in May in Harlem?

The average sunshine duration in May in Harlem is 10.4h.

How high is the UV index in May in Harlem?

In Harlem, the average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Harlem, MT

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

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is February (26.2°F).

  • Average low temperature in May: 45°F

The month with the highest average low temperature is August (60.3°F).
The coldest month (with the lowest average low temperature) is February (12.6°F).

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Average pressure in May
Harlem, MT

Average pressure in May - Harlem, MT
  • Average pressure in May: 29.92"Hg

The month with the highest atmospheric pressure is February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).

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Average wind speed in May
Harlem, MT

Average wind speed in May - Harlem, MT
  • Average wind speed in May: 9.8mph

The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (8.7mph).

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Average humidity in May
Harlem, MT

Average humidity in May - Harlem, MT
  • Average humidity in May: 55%

The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is August (42%).

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Average rainfall in May
Harlem, MT

Average rainfall in May - Harlem, MT
  • Average rainfall in May: 1.42"

The wettest month (with the highest rainfall) is June (1.85").
The driest months (with the least rainfall) are February, March and December (0.55").

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Average rainfall days in May
Harlem, MT

Average rainfall days in May - Harlem, MT
  • Average rainfall days in May: 13.2 days

The month with the highest number of rainy days is May (13.2 days).
The month with the least rainy days is February (4.6 days).

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Average snowfall in May
Harlem, MT

Average snowfall in May - Harlem, MT
  • Average snowfall in May: 0.35"

The month with the highest snowfall is January (4.02").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in May
Harlem, MT

Average snowfall days in May - Harlem, MT
  • Average snowfall days in May: 0.6 days

The month with the highest number of snowfall days is January (12.4 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in May / Average sunshine in May - Harlem, MT
  • Average daylight in May: 15h and 2min

The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).

  • Average sunshine in May: 10h and 2min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).

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Average sunshine days in May
Harlem, MT

Average sunshine days in May - Harlem, MT
  • Average sunshine days in May: 14.5 days

The month with the most sunshine days is July (21.6 days).
The month with the least sunshine days is April (12.5 days).

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Average UV index in May
Harlem, MT

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

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).

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Average cloud cover in May
Harlem, MT

Average cloud cover in May - Harlem, MT
  • Average cloud cover in May: 31

The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 15).

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Average visibility in May
Harlem, MT

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

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

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Harlem, Montana, USA

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