Idaho Falls
Idaho, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Idaho Falls, ID

An eye-catching shot of the Snake River, Idaho Falls, with a clear view of the iconic Idaho Falls Temple in the back, through the trees
An eye-catching shot of the Snake River, Idaho Falls, with a clear view of the iconic Idaho Falls Temple in the back, through the trees
The last month of the spring, May, is an enjoyable month in Idaho Falls, Idaho, with average temperature varying between 67.8°F (19.9°C) and 38.7°F (3.7°C).

Temperature

In May, the average high-temperature rises, from a mild 58.6°F (14.8°C) in April, to an enjoyable 67.8°F (19.9°C). In Idaho Falls, the average low-temperature is 38.7°F (3.7°C).

Rainfall

May is the month with the most rainfall in Idaho Falls. Rain falls for 10 days and accumulates 2" (51.1mm) of precipitation.

Daylight

In May, the average length of the day in Idaho Falls is 14.7h.

Sunshine

The average sunshine in Idaho Falls is 10h.

UV index

In May, the average daily maximum UV index is 8. A UV Index reading of 8 to 10 represents a very high threat to health from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 8 in May transform into the following instructions:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in May in Idaho Falls?

In Idaho Falls, in May, the average high-temperature is 67.8°F (19.9°C), and the average low-temperature is 38.7°F (3.7°C).

How much does it rain in Idaho Falls in May?

In Idaho Falls, in May, during 10 rainfall days, 2" (51.1mm) of precipitation is typically accumulated.

What is the rainiest month in Idaho Falls?

The month with the most rainfall is May when the rain falls for 10 days and typically aggregates up to 2" (51.1mm) of precipitation.

How many hours of daylight does Idaho Falls have in May?

In May, the average length of the day in Idaho Falls is 14.7h.

How many hours of sunshine does Idaho Falls have in May?

In May, the average sunshine in Idaho Falls, Idaho, is 10h.

What is the UV index intensity in May in Idaho Falls?

The average daily maximum UV index in May in Idaho Falls is 8. A UV Index value of 8 to 10 symbolizes a very high health threat from unprotected exposure to the UV radiation.
Average temperature in May - Idaho Falls, ID
  • Average high temperature in May: 67.9°F

The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (29.7°F).

  • Average low temperature in May: 38.7°F

The month with the highest average low temperature is July (51.4°F).
The coldest month (with the lowest average low temperature) is January (12.5°F).

Average rainfall in May - Idaho Falls, ID
  • Average rainfall in May: 2"

The wettest month (with the highest rainfall) is May (2").
The driest month (with the lowest rainfall) is July (0.7").

Average rainfall days in May - Idaho Falls, ID
  • Average rainfall days in May: 10 days

Months with the highest number of rainy days are January and December (11 days).
Months with the lowest number of rainy days are July and October (5 days).

Average daylight in May / Average sunshine in May - Idaho Falls, ID
  • Average daylight in May: 14.7h

The month with the longest days is June (Average daylight: 15.4h).
The month with shortest days is December (Average daylight: 9h).

  • Average sunshine in May: 10h

The month with most sunshine is July (Average sunshine: 12h).
Months with least sunshine are January, November and December (Average sunshine: 4).

Average UV index in May - Idaho Falls, ID
  • Average UV index in May: 8

The month with the highest UV index is July (UV index 10).
Months with the lowest UV index are January and December (UV index 1).