May weather forecast
Powder River, WY

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Weather in May

The last month of the spring, May, is a comfortable month in Powder River, Wyoming, with an average temperature ranging between min 42.1°F (5.6°C) and max 62.6°F (17°C).

Temperature

Powder River, Wyoming, sees an increase in average high-temperatures during May, moving from a fresh 52°F (11.1°C) in April to a refreshing 62.6°F (17°C). Powder River, in May, observes a steady average low-temperature of 42.1°F (5.6°C).

Humidity

In Powder River, the average relative humidity in May is 53%.

Rainfall

The month with the most rainfall is May, when the rain falls for 10.9 days and typically aggregates up to 1.34" (34mm) of precipitation.

Snowfall

Months with snowfall are January through May, September through December. May is the last month it regularly snows. During 2.3 snowfall days, in May, Powder River aggregates 2.4" (61mm) of snow. In Powder River, during the entire year, snow falls for 62.6 days and aggregates up to 31.65" (804mm) of snow.

Daylight

In May, the average length of the day is 14h and 41min.
On the first day of May in Powder River, Wyoming, sunrise is at 6:00 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 5:31 am and sunset at 8:40 pm MDT.

Sunshine

In May, the average sunshine is 10.9h.

UV index

In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum daily UV index of 5 during May translates into the following directions:
Ensure safety - Recommendations to avert sunburn are presented. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
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Frequently asked questions

What is the average May temperature in Powder River?

May temperatures in Powder River, Wyoming, vary between a high-temperature of 62.6°F (17°C) and a low-temperature of 42.1°F (5.6°C).

What is the average humidity in May in Powder River?

In May, the average relative humidity is 53%.

What is the rainiest month in Powder River?

The month with the most rainfall in Powder River, Wyoming, is May, when the rain falls for 10.9 days and typically aggregates up to 1.34" (34mm) of precipitation.

How much does it rain in Powder River in May?

In Powder River, during May, the rain falls for 10.9 days and regularly aggregates up to 1.34" (34mm) of precipitation.

What is the last month it snows in Powder River?

May is the last month it regularly snows in Powder River, Wyoming. During 2.3 snowfall days, in May, Powder River aggregates 2.4" (61mm) of snow.

What is the average length of the day in May in Powder River?

The average day length in May is 14h and 41min.

When are sunrise and sunset in May in Powder River?

In May, on the first day of the month, sunrise is at 6:00 am and sunset at 8:09 pm. On the last day of the month, in Powder River, sunrise is at 5:31 am and sunset at 8:40 pm MDT.

How many hours of sunshine does Powder River have in May?

In May, the average sunshine duration in Powder River is 10.9h.

How high is the UV index in May in Powder River?

In Powder River, Wyoming, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from 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
Powder River, WY

Average temperature in May - Powder River, WY
  • Average high temperature in May: 62.6°F

The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is December (28.6°F).

  • Average low temperature in May: 42.1°F

The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is December (15.1°F).

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Average pressure in May
Powder River, WY

Average pressure in May - Powder River, WY
  • Average pressure in May: 29.9"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

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Average wind speed in May
Powder River, WY

Average wind speed in May - Powder River, WY
  • Average wind speed in May: 9.8mph

The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is August (8.4mph).

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Average humidity in May
Powder River, WY

Average humidity in May - Powder River, WY
  • Average humidity in May: 53%

The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (36%).

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Average rainfall in May
Powder River, WY

Average rainfall in May - Powder River, WY
  • Average rainfall in May: 1.34"

The wettest month (with the highest rainfall) is May (1.34").
The driest month (with the least rainfall) is August (0.35").

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Average rainfall days in May
Powder River, WY

Average rainfall days in May - Powder River, WY
  • Average rainfall days in May: 10.9 days

The month with the highest number of rainy days is May (10.9 days).
The month with the least rainy days is December (3.3 days).

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Average snowfall in May
Powder River, WY

Average snowfall in May - Powder River, WY
  • Average snowfall in May: 2.4"

The month with the highest snowfall is March (5.55").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in May
Powder River, WY

Average snowfall days in May - Powder River, WY
  • Average snowfall days in May: 2.3 days

The month with the highest number of snowfall days is February (11.3 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
Powder River, WY

Average daylight in May / Average sunshine in May - Powder River, WY
  • Average daylight in May: 14h and 4min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in May: 10h and 5min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is February (Average sunshine: 6h and 12min).

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Average sunshine days in May
Powder River, WY

Average sunshine days in May - Powder River, WY
  • Average sunshine days in May: 15.9 days

The month with the most sunshine days is August (20.3 days).
The month with the least sunshine days is April (13.6 days).

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Average UV index in May
Powder River, WY

Average UV index in May - Powder River, WY
  • Average UV index in May: 5

The months with the highest UV index are June, July and August (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
Powder River, WY

Average cloud cover in May - Powder River, WY
  • Average cloud cover in May: 27

The month with the most cloud cover is February (Cloud cover 34).
The month with the least cloud cover is August (Cloud cover 13).

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Average visibility in May
Powder River, WY

Average visibility in May - Powder River, WY
  • 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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Powder River, Wyoming, USA

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