May weather forecast
Joliet, MT

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Weather in May

The last month of the spring, May, is a comfortable month in Joliet, Montana, with an average temperature fluctuating between 41.4°F (5.2°C) and 61°F (16.1°C).

Temperature

Joliet's transition into May is marked by a temperature shift, moving from a fresh 51.3°F (10.7°C) in April to a refreshing 61°F (16.1°C). During May, the average low-temperature in Joliet is a wintry 41.4°F (5.2°C).

Humidity

In May, the average relative humidity in Joliet is 62%.

Rainfall

May is the month with the most rainfall. Rain falls for 16.3 days and accumulates 2.09" (53mm) of precipitation.

Snowfall

Months with snowfall in Joliet are January through June, September through December. In May, it is snowing for 2.4 days. Throughout May, 2.83" (72mm) of snow is accumulated. Throughout the year, in Joliet, there are 61.5 snowfall days, and 41.77" (1061mm) of snow is accumulated.

Daylight

In May, the average length of the day in Joliet, Montana, is 14h and 56min.
On the first day of May in Joliet, sunrise is at 6:02 am and sunset at 8:23 pm. On the last day of the month, sunrise is at 5:30 am and sunset at 8:56 pm MDT.

Sunshine

In May, the average sunshine in Joliet is 10.5h.

UV index

The average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: In May, a daily maximum UV index of 4 leads to the following instructions:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
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Frequently asked questions

What is the temperature in May in Joliet?

An average high-temperature, in May, in Joliet, is 61°F (16.1°C) and the average low-temperature is 41.4°F (5.2°C).

What is the average humidity in May in Joliet?

The average relative humidity in May is 62%.

What is the rainiest month in Joliet?

The month with the most rainfall is May, when the rain falls for 16.3 days and typically aggregates up to 2.09" (53mm) of precipitation.

How much does it rain in Joliet in May?

In Joliet, in May, it is raining for 16.3 days, with typically 2.09" (53mm) of accumulated precipitation.

How much does it snow in Joliet in May?

In May, in Joliet, Montana, it is snowing for 2.4 days. Throughout May, 2.83" (72mm) of snow is accumulated.

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

In May, the average day length is 14h and 56min.

When is the sunrise / sunset in May in Joliet?

In May, on the first day of the month, sunrise is at 6:02 am and sunset at 8:23 pm. On the last day of the month, in Joliet, sunrise is at 5:30 am and sunset at 8:56 pm MDT.

How long on average sun shines in May in Joliet?

The average sunshine duration in May in Joliet is 10.5h.

What is the UV index reading in May in Joliet?

The average daily maximum UV index in May in Joliet is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Joliet, MT

Average temperature in May - Joliet, MT
  • Average high temperature in May: 61°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is December (30.7°F).

  • Average low temperature in May: 41.4°F

The months with the highest average low temperature are July and August (57.2°F).
The coldest month (with the lowest average low temperature) is February (16.7°F).

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Average pressure in May
Joliet, MT

Average pressure in May - Joliet, MT
  • Average pressure in May: 29.93"Hg

The months with the highest atmospheric pressure are January and December (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed in May
Joliet, MT

Average wind speed in May - Joliet, MT
  • Average wind speed in May: 7.1mph

The windiest month (with the highest average wind speed) is January (8.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).

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Average humidity in May
Joliet, MT

Average humidity in May - Joliet, MT
  • Average humidity in May: 62%

The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is August (41%).

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Average rainfall in May
Joliet, MT

Average rainfall in May - Joliet, MT
  • Average rainfall in May: 2.09"

The wettest month (with the highest rainfall) is May (2.09").
The driest month (with the least rainfall) is January (0.51").

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Average rainfall days in May
Joliet, MT

Average rainfall days in May - Joliet, MT
  • Average rainfall days in May: 16.3 days

The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (4 days).

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Average snowfall in May
Joliet, MT

Average snowfall in May - Joliet, MT
  • Average snowfall in May: 2.83"

The month with the highest snowfall is February (6.81").
The months with the least snowfall are July and August (0").

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Average snowfall days in May
Joliet, MT

Average snowfall days in May - Joliet, MT
  • Average snowfall days in May: 2.4 days

The month with the highest number of snowfall days is February (10.8 days).
The months with the least snowfall days are July and August (0 days).

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

Average daylight in May / Average sunshine in May - Joliet, MT
  • Average daylight in May: 14h and 5min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in May: 10h and 3min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 12min).

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Average sunshine days in May
Joliet, MT

Average sunshine days in May - Joliet, MT
  • Average sunshine days in May: 10.5 days

The month with the most sunshine days is December (19.7 days).
The month with the least sunshine days is May (10.5 days).

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Average UV index in May
Joliet, MT

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

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

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Average cloud cover in May
Joliet, MT

Average cloud cover in May - Joliet, MT
  • Average cloud cover in May: 32

The month with the most cloud cover is February (Cloud cover 38).
The months with the least cloud cover are July and August (Cloud cover 15).

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Average visibility in May
Joliet, MT

Average visibility in May - Joliet, 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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Joliet, Montana, USA

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