May weather forecast
Irwin, ID

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Weather in May

May, the last month of the spring in Irwin, is a mild month, with temperature in the range of an average low of 31.3°F (-0.4°C) and an average high of 55.4°F (13°C).

Temperature

In Irwin, the average high-temperature in May increases from a wintry 42.1°F (5.6°C) in April to a moderate 55.4°F (13°C). Throughout May nights, a significant departure from daytime temperatures, with an average low of 31.3°F (-0.4°C), is recognized.

Humidity

The average relative humidity in May in Irwin is 70%.

Rainfall

In Irwin, Idaho, in May, it is raining for 17.9 days, with typically 2.52" (64mm) of accumulated precipitation. Throughout the year, in Irwin, there are 127 rainfall days, and 24.29" (617mm) of precipitation is accumulated.

Snowfall

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

Daylight

The average length of the day in May is 14h and 43min.
On the first day of the month, sunrise is at 6:16 am and sunset at 8:27 pm. On the last day of May, in Irwin, sunrise is at 5:47 am and sunset at 8:58 pm MDT.

Sunshine

In Irwin, the average sunshine in May is 10.1h.

UV index

In May, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In May, a regular UV index of 3 translates into these guidelines:
Put precautions into practice - Guidance to elude sunburn is provided. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Opt for tightly woven and loose clothing to enhance protection from the Sun. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in Irwin in May?

An average high-temperature, in May, in Irwin, is 55.4°F (13°C) and the average low-temperature is 31.3°F (-0.4°C).

What is the average humidity in May in Irwin?

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

How much does it rain in Irwin in May?

In Irwin, Idaho, in May, during 17.9 rainfall days, 2.52" (64mm) of precipitation is typically accumulated.

How many days does it snow in May in Irwin?

In Irwin, in May, during 4.1 snowfall days, 2.87" (73mm) of snow is typically accumulated.

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

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

When are sunrise and sunset in May in Irwin?

In May, on the first day of the month, sunrise is at 6:16 am and sunset at 8:27 pm. On the last day of the month, in Irwin, sunrise is at 5:47 am and sunset at 8:58 pm MDT.

How many hours of sunshine does Irwin have in May?

The average sunshine duration in May is 10.1h.

What is the UV index reading in May in Irwin?

In Irwin, Idaho, the average daily maximum UV index in May is 3. A UV Index estimate of 3 to 5 represents a moderate health threat 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
Irwin, ID

Average temperature in May - Irwin, 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).

Average pressure in May
Irwin, ID

Average pressure in May - Irwin, 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).

Average wind speed in May
Irwin, ID

Average wind speed in May - Irwin, 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).

Average humidity in May
Irwin, ID

Average humidity in May - Irwin, 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%).

Average rainfall in May
Irwin, ID

Average rainfall in May - Irwin, 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").

Average rainfall days in May
Irwin, ID

Average rainfall days in May - Irwin, 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).

Average snowfall in May
Irwin, ID

Average snowfall in May - Irwin, 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").

Average snowfall days in May
Irwin, ID

Average snowfall days in May - Irwin, 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).

Average daylight in May /
Average sunshine in May
Irwin, ID

Average daylight in May / Average sunshine in May - Irwin, 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).

Average sunshine days in May
Irwin, ID

Average sunshine days in May - Irwin, 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).

Average UV index in May
Irwin, ID

Average UV index in May - Irwin, 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).

Average cloud cover in May
Irwin, ID

Average cloud cover in May - Irwin, 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).

Average visibility in May
Irwin, ID

Average visibility in May - Irwin, 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).

Irwin, Idaho, USA

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