May weather forecastStanley, ID

A mirror image of the iconic Sawtooth Mountain Range located in Meadow Creek in Stanley, Idaho, in the famed Sawtooth National Recreation Area

May

Weather in May

May is the month of contrast. As the spring progresses, temperatures continue to climb, reaching up to 48.6°F (9.2°C) in the daytime. While snow continues to fall, the rate drops to a relatively low 4.45" (113mm) over seven days, making it the first snow-free month since winter. The town transforms slowly and gracefully from a winter wonderland to a vibrant green canvass, bursting with life.

Temperature

In Stanley, the average high-temperature in May increases from an icy 36.5°F (2.5°C) in April to a frosty 48.6°F (9.2°C). Stanley registers a pronounced decline from daytime peak temperatures, averaging a subzero cold 27°F (-2.8°C) lows in May.

Humidity

In Stanley, the average relative humidity in May is 75%.

Rainfall

In Stanley, in May, it is raining for 16.3 days, with typically 1.93" (49mm) of accumulated precipitation. Throughout the year, there are 98.2 rainfall days, and 19.25" (489mm) of precipitation is accumulated.

Snowfall

January through June, September through December are months with snowfall. In Stanley, Idaho, in May, snow falls for 7.6 days, with typically accumulated 4.45" (113mm) of snow. In Stanley, Idaho, during the entire year, snow falls for 131.3 days and aggregates up to 100.24" (2546mm) of snow.

Daylight

In Stanley, the average length of the day in May is 14h and 48min.
On the first day of May, sunrise is at 6:29 am and sunset at 8:44 pm. On the last day of the month, sunrise is at 5:59 am and sunset at 9:16 pm MDT.

Sunshine

In May, the average sunshine is 9.6h.

UV index

In May, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.
Note: The UV index of 3 during May leads to these advisories:
Take precautions - Protection against skin and eye damage is obliged. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.

Updated: Aug 24, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature during May is 48.6°F (9.2°C) and the low-temperature is 27°F (-2.8°C).

The average relative humidity in May is 75%.

In May, the rain falls for 16.3 days. Throughout May, 1.93" (49mm) of precipitation is accumulated.

In Stanley, in May, snow falls for 7.6 days, with typically accumulated 4.45" (113mm) of snow.

The average day length in May is 14h and 48min.

In May, on the first day of the month, sunrise is at 6:29 am and sunset at 8:44 pm. On the last day of the month, sunrise is at 5:59 am and sunset at 9:16 pm MDT.

In May, the average sunshine duration is 9.6h.

In May, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A May J J A S O N D

Apr

May

Jun

Average high temperature

36.5°F

48.6°F

60.3°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

5.6mph

5.7mph

6.7mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

8.1

12.2

Average UV index

Average cloud cover

Average visibility

Average temperature in May
Stanley, ID

Average high temperature in May: 48.6°F

The warmest month (with the highest average high temperature) is July (72.7°F).
The month with the lowest average high temperature is December (23.9°F).

Average low temperature in May: 27°F

The month with the highest average low temperature is July (43.3°F).
The coldest month (with the lowest average low temperature) is December (5.4°F).

Average pressure in May
Stanley, ID

Average pressure in May: 29.93"Hg

The month with the highest atmospheric pressure is January (30.26"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in May
Stanley, ID

Average wind speed in May: 5mph

The windiest month (with the highest average wind speed) is July (5.8mph).
The calmest months (with the lowest average wind speed) are January and October (4.8mph).

Average humidity in May
Stanley, ID

Average humidity in May: 75%

The months with the highest relative humidity are February and March (91%).
The month with the lowest relative humidity is July (44%).

Average rainfall in May
Stanley, ID

Average rainfall in May: 1.93"

The wettest month (with the highest rainfall) is March (2.17").
The driest months (with the least rainfall) are July and August (0.63").

Average rainfall days in May
Stanley, ID

Average rainfall days in May: 16.3 days

The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is January (3.1 days).

Average snowfall in May
Stanley, ID

Average snowfall in May: 4.45"

The month with the highest snowfall is December (16.77").
The months with the least snowfall are July and August (0").

Average snowfall days in May
Stanley, ID

Average snowfall days in May: 7.6 days

The month with the highest number of snowfall days is March (21.6 days).
The months with the least snowfall days are July and August (0 days).

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

Average daylight in May: 14h and 48min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

Average sunshine in May: 9h and 36min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are January and December (Average sunshine: 4h and 24min).