May weather forecast
Salmon, ID

Bright yellow trees along the shores of the iconic Salmon River in Salmon, Idaho
Bright yellow trees along the shores of the iconic Salmon River in Salmon, Idaho

Weather in May

The last month of the spring, May, is a cool month in Salmon, Idaho, with an average temperature fluctuating between 33.8°F (1°C) and 54.1°F (12.3°C).

Temperature

In May, the average high-temperature increases from a cold 41.9°F (5.5°C) in April to a fresh 54.1°F (12.3°C). In Salmon, Idaho, the average low-temperature is 33.8°F (1°C).

Humidity

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

Rainfall

In Salmon, Idaho, during May, the rain falls for 18.3 days and regularly aggregates up to 1.89" (48mm) of precipitation. In Salmon, during the entire year, the rain falls for 129.5 days and collects up to 12.4" (315mm) of precipitation.

Snowfall

Months with snowfall are January through May, September through December. May is the last month it regularly snows. During 1.7 snowfall days, Salmon aggregates 0.94" (24mm) of snow. Throughout the year, there are 63.5 snowfall days, and 22.76" (578mm) of snow is accumulated.

Daylight

In Salmon, Idaho, the average length of the day in May is 14h and 53min.
On the first day of May, sunrise is at 6:23 am and sunset at 8:41 pm. On the last day of the month, sunrise is at 5:51 am and sunset at 9:14 pm MDT.

Sunshine

The average sunshine in May is 10.5h.

UV index

In Salmon, the average daily maximum UV index in May is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.
Note: The daily maximum UV index of 3 in May interpret into the following advice:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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 Salmon?

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

How many days does it rain in May in Salmon?

In Salmon, in May, during 18.3 rainfall days, 1.89" (48mm) of precipitation is typically accumulated.

What is the last month it snows in Salmon?

May is the last month it regularly snows in Salmon, Idaho. During 1.7 snowfall days, in May, Salmon aggregates 0.94" (24mm) of snow.

How many hours of daylight does Salmon have in May?

In May, the average day length is 14h and 53min.

What time are sunrise and sunset in May in Salmon?

In May, on the first day of the month, sunrise is at 6:23 am and sunset at 8:41 pm. On the last day of the month, in Salmon, Idaho, sunrise is at 5:51 am and sunset at 9:14 pm MDT.

How long on average sun shines in May in Salmon?

In May, the average sunshine duration in Salmon, Idaho, is 10.5h.

How high is the UV index in May in Salmon?

In Salmon, Idaho, the average daily maximum UV index in May is 3. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Salmon, ID

Average temperature in May - Salmon, ID
  • Average high temperature in May: 54.1°F

The warmest month (with the highest average high temperature) is July (75.7°F).
The month with the lowest average high temperature is December (25.2°F).

  • Average low temperature in May: 33.8°F

The month with the highest average low temperature is August (47.5°F).
The coldest months (with the lowest average low temperature) are January and December (9.5°F).

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Average pressure in May
Salmon, ID

Average pressure in May - Salmon, ID
  • Average pressure in May: 29.95"Hg

The month with the highest atmospheric pressure is January (30.25"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in May
Salmon, ID

Average wind speed in May - Salmon, ID
  • Average wind speed in May: 4.8mph

The windiest months (with the highest average wind speed) are March and April (5.2mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).

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Average humidity in May
Salmon, ID

Average humidity in May - Salmon, ID
  • Average humidity in May: 64%

The month with the highest relative humidity is February (89%).
The month with the lowest relative humidity is August (43%).

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Average rainfall in May
Salmon, ID

Average rainfall in May - Salmon, ID
  • Average rainfall in May: 1.89"

The wettest month (with the highest rainfall) is June (2.05").
The driest months (with the least rainfall) are July and August (0.51").

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Average rainfall days in May
Salmon, ID

Average rainfall days in May - Salmon, ID
  • Average rainfall days in May: 18.3 days

The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is January (6.3 days).

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Average snowfall in May
Salmon, ID

Average snowfall in May - Salmon, ID
  • Average snowfall in May: 0.94"

The month with the highest snowfall is February (5").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in May
Salmon, ID

Average snowfall days in May - Salmon, ID
  • Average snowfall days in May: 1.7 days

The month with the highest number of snowfall days is February (12.3 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
Salmon, ID

Average daylight in May / Average sunshine in May - Salmon, ID
  • Average daylight in May: 14h and 53min

The month with the longest days is June (Average daylight: 15h and 35min).
The month with the shortest days is December (Average daylight: 8h and 49min).

  • Average sunshine in May: 10h and 30min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).

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Average sunshine days in May
Salmon, ID

Average sunshine days in May - Salmon, ID
  • Average sunshine days in May: 8.1 days

The month with the most sunshine days is July (19.4 days).
The month with the least sunshine days is April (7.7 days).

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Average UV index in May
Salmon, ID

Average UV index in May - Salmon, 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 and December (UV index 1).

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Average cloud cover in May
Salmon, ID

Average cloud cover in May - Salmon, ID
  • Average cloud cover in May: 32

The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 13).

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Average visibility in May
Salmon, ID

Average visibility in May - Salmon, 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, March and December (4mi).

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