May weather forecast
Swan Valley, ID

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Weather in May

The last month of the spring, May, is a mild month in Swan Valley, Idaho, with an average temperature varying between 31.3°F (-0.4°C) and 55.4°F (13°C).

Temperature

May brings a temperature change, with average high-temperatures moving from April's icy 42.1°F (5.6°C) to a refreshing 55.4°F (13°C). A steep decline to a subzero cold 31.3°F (-0.4°C) characterizes the May nights.

Humidity

In Swan Valley, Idaho, the average relative humidity in May is 70%.

Rainfall

In Swan Valley, in May, during 17.9 rainfall days, 2.52" (64mm) of precipitation is typically accumulated. Throughout the year, in Swan Valley, Idaho, there are 127 rainfall days, and 24.29" (617mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Swan Valley are January through June, September through December. In May, it is snowing for 4.1 days. Throughout May, 2.87" (73mm) of snow is accumulated. Throughout the year, in Swan Valley, there are 126.6 snowfall days, and 110.28" (2801mm) of snow is accumulated.

Daylight

In Swan Valley, the average length of the day in May is 14h and 43min.
On the first day of May in Swan Valley, sunrise is at 6:16 am and sunset at 8:27 pm. On the last day of the month, sunrise is at 5:47 am and sunset at 8:59 pm MDT.

Sunshine

The average sunshine in May in Swan Valley, Idaho, is 10.1h.

UV index

In Swan Valley, the average daily maximum UV index in May is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.
Note: The UV index of 3 during May translates into the following guidance:
Undertake protective steps - Preventing sun damage is advised. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
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Frequently asked questions

What is the average May temperature in Swan Valley?

May temperatures in Swan Valley vary between a high-temperature of 55.4°F (13°C) and a low-temperature of 31.3°F (-0.4°C).

What is the average humidity in May in Swan Valley?

In May, the average relative humidity in Swan Valley, Idaho, is 70%.

How much does it rain in Swan Valley in May?

In Swan Valley, in May, it is raining for 17.9 days, with typically 2.52" (64mm) of accumulated precipitation.

How many days does it snow in May in Swan Valley?

In May, it is snowing for 4.1 days. Throughout May, 2.87" (73mm) of snow is accumulated.

How many hours of daylight does Swan Valley have in May?

In May, the average day length is 14h and 43min.

What time are sunrise and sunset in May in Swan Valley?

On the first day of May, sunrise is at 6:16 am and sunset at 8:27 pm. On the last day of the month, sunrise is at 5:47 am and sunset at 8:59 pm MDT.

How long on average sun shines in May in Swan Valley?

The average sunshine duration in May in Swan Valley is 10.1h.

What is the UV index reading in May in Swan Valley?

The average daily maximum UV index in May is 3. A UV Index reading of 3 to 5 represents a moderate vulnerability from exposure to the Sun's UV radiation.
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
Swan Valley, ID

Average temperature in May - Swan Valley, ID
  • Average high temperature in May: 55.4°F

The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is December (24.3°F).

  • Average low temperature in May: 31.3°F

The months with the highest average low temperature are July and August (45.3°F).
The coldest month (with the lowest average low temperature) is January (7.3°F).

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Average pressure in May
Swan Valley, ID

Average pressure in May - Swan Valley, ID
  • Average pressure in May: 29.92"Hg

The month with the highest atmospheric pressure is January (30.28"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in May
Swan Valley, ID

Average wind speed in May - Swan Valley, ID
  • Average wind speed in May: 5mph

The windiest month (with the highest average wind speed) is June (5.7mph).
The calmest month (with the lowest average wind speed) is January (4.3mph).

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Average humidity in May
Swan Valley, ID

Average humidity in May - Swan Valley, ID
  • Average humidity in May: 70%

The month with the highest relative humidity is February (94%).
The month with the lowest relative humidity is August (46%).

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Average rainfall in May
Swan Valley, ID

Average rainfall in May - Swan Valley, ID
  • Average rainfall in May: 2.52"

The wettest month (with the highest rainfall) is February (2.91").
The driest month (with the least rainfall) is July (0.91").

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Average rainfall days in May
Swan Valley, ID

Average rainfall days in May - Swan Valley, ID
  • Average rainfall days in May: 17.9 days

The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is January (4.6 days).

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Average snowfall in May
Swan Valley, ID

Average snowfall in May - Swan Valley, ID
  • Average snowfall in May: 2.87"

The month with the highest snowfall is February (22.91").
The months with the least snowfall are July and August (0").

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Average snowfall days in May
Swan Valley, ID

Average snowfall days in May - Swan Valley, ID
  • Average snowfall days in May: 4.1 days

The months with the highest number of snowfall days are February and December (22.3 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
Swan Valley, ID

Average daylight in May / Average sunshine in May - Swan Valley, ID
  • Average daylight in May: 14h and 4min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in May: 10h and 1min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).

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Average sunshine days in May
Swan Valley, ID

Average sunshine days in May - Swan Valley, ID
  • Average sunshine days in May: 7.8 days

The month with the most sunshine days is September (16.2 days).
The month with the least sunshine days is April (5.3 days).

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Average UV index in May
Swan Valley, ID

Average UV index in May - Swan Valley, ID
  • Average UV index in May: 3

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).

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Average cloud cover in May
Swan Valley, ID

Average cloud cover in May - Swan Valley, ID
  • Average cloud cover in May: 33

The month with the most cloud cover is February (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 13).

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Average visibility in May
Swan Valley, ID

Average visibility in May - Swan Valley, ID
  • Average visibility in May: 6mi

The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (3mi).

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Swan Valley, Idaho, USA

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