May weather forecast
Jerome, ID

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The high rocks around the Snake River near the iconic Shoshone Falls in Jerome County, Idaho
The high rocks around the Snake River near the iconic Shoshone Falls in Jerome County, Idaho

Weather in May

May introduces the first hints of summer in Jerome, Idaho, with a more significant rise in temperature. The weather transitions from April’s scattered frosts and minimal snowfall to being entirely free of snow in May, signaling the beginning of summer. The burst of May's sunshine and the longer days kick-start the summer outdoor activities. The advent of warm weather is a welcome sight for residents. Looking ahead to June, residents brace themselves for the proper arrival of the summer season.

Temperature

As April transitions into May, Jerome sees a rise in the average high-temperature, moving from a moderate 57.2°F (14°C) to a comfortable 67.1°F (19.5°C). A significant drop from the day's peak to an average low-temperature of 45.1°F (7.3°C) is noted during the nights in May.

Humidity

In May, the average relative humidity is 46%.

Rainfall

In May, the rain falls for 10.2 days. Throughout May, 0.83" (21mm) of precipitation is accumulated. Throughout the year, there are 86.9 rainfall days, and 8.98" (228mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall.

Daylight

In May, the average length of the day is 14h and 39min.
On the first day of the month, sunrise is at 6:31 am and sunset at 8:39 pm. On the last day of May, sunrise is at 6:02 am and sunset at 9:09 pm MDT.

Sunshine

In Jerome, Idaho, the average sunshine in May is 11.1h.

UV index

In May, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The UV index of 5 during May translates into the following guidance:
Exercise prevention - Warding off sunburn is urged. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Updated: Jun 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are May temperatures?

The high-temperature during May is 67.1°F (19.5°C) and the low-temperature is 45.1°F (7.3°C).

What is the average humidity in May?

In Jerome, the average relative humidity in May is 46%.

How much does it rain in May?

In Jerome, in May, during 10.2 rainfall days, 0.83" (21mm) of precipitation is typically accumulated.

When it does not snow?

May through September are months without snowfall.

Does it snow in May?

In May, it doesn't snow. April is the latest month when it typically snows.

What is the average length of the day in May?

The average day length in May is 14h and 39min.

What time are sunrise and sunset in May?

On the first day of May, sunrise is at 6:31 am and sunset at 8:39 pm. On the last day of the month, sunrise is at 6:02 am and sunset at 9:09 pm MDT.

How long on average sun shines in May?

The average sunshine duration in May is 11.1h.

What is the UV index intensity in May?

In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Jerome, ID

Average temperature in May - Jerome, ID
  • Average high temperature in May: 67.1°F

The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is December (32.9°F).

  • Average low temperature in May: 45.1°F

The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is December (21.9°F).

Average pressure in May
Jerome, ID

Average pressure in May - Jerome, ID
  • Average pressure in May: 29.89"Hg

The month with the highest atmospheric pressure is January (30.28"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

Average wind speed in May
Jerome, ID

Average wind speed in May - Jerome, ID
  • Average wind speed in May: 8.3mph

The windiest month (with the highest average wind speed) is April (9.5mph).
The calmest month (with the lowest average wind speed) is August (7mph).

Average humidity in May
Jerome, ID

Average humidity in May - Jerome, ID
  • Average humidity in May: 46%

The month with the highest relative humidity is January (80%).
The months with the lowest relative humidity are July and August (29%).

Average rainfall in May
Jerome, ID

Average rainfall in May - Jerome, ID
  • Average rainfall in May: 0.83"

The wettest month (with the highest rainfall) is December (1.3").
The driest month (with the least rainfall) is July (0.16").

Average rainfall days in May
Jerome, ID

Average rainfall days in May - Jerome, ID
  • Average rainfall days in May: 10.2 days

The month with the highest number of rainy days is March (11.3 days).
The month with the least rainy days is July (3.3 days).

Average snowfall in May
Jerome, ID

Average snowfall in May - Jerome, ID
  • Average snowfall in May: 0"

The month with the highest snowfall is January (7.44").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in May
Jerome, ID

Average snowfall days in May - Jerome, ID
  • Average snowfall days in May: 0.2 days

The months with the highest number of snowfall days are January and December (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in May / Average sunshine in May - Jerome, ID
  • 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: 11h and 1min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

Average sunshine days in May
Jerome, ID

Average sunshine days in May - Jerome, ID
  • Average sunshine days in May: 17.8 days

The month with the most sunshine days is July (25.2 days).
The month with the least sunshine days is March (15.2 days).

Average UV index in May
Jerome, ID

Average UV index in May - Jerome, ID
  • Average UV index in May: 5

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in May
Jerome, ID

Average cloud cover in May - Jerome, ID
  • Average cloud cover in May: 23

The month with the most cloud cover is December (Cloud cover 39).
The months with the least cloud cover are July and August (Cloud cover 9).

Average visibility in May
Jerome, ID

Average visibility in May - Jerome, ID
  • 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).

Jerome, Idaho, USA

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