Yearly & Monthly weather

The climate of Stanley
The best time to visit Stanley
The worst time to visit Stanley
Spring weather in Stanley
Summer weather in Stanley
Autumn weather in Stanley
Winter weather in Stanley
Weather in January
Weather in February
Weather in March
Weather in April
Weather in May
Weather in June
Weather in July
Weather in August
Weather in September
Weather in October
Weather in November
Weather in December
Frequently asked questions
Average temperature
Average pressure
Average wind speed
Average humidity
Average rainfall
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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

The climate of Stanley

Stanley, Idaho, is situated in the subarctic, subalpine region of the United States, categorised as Dsc under the Köppen climate classification. This region's weather significantly fluctuates throughout the year, known for its cold, snowy winters and relatively mild, sunny summers. There's also a noticeable difference in temperature highs and lows, as the readings can vary from an average low of 5.4°F (-14.8°C) in winter to an average high of 72.7°F (22.6°C) in summer.

Rainfall distribution's also uneven throughout the year with the highest volumes recorded from February to May, exceeding 1.8" (46mm) each month. Meanwhile, July and August encounter the least rainfall, registering merely 0.63" (16mm). This pattern is mirrored in the number of rainfall days, seeing more wet days in spring and fewer in the hotter months.

Interestingly, Stanley features a contrasting picture when it comes to snowfall. The coldest months from January to March see the highest snowfall volumes, over 14" (356mm) each. This wanes during the warm months when there is virtually no snowfall. The amount of snowfall is reflective of the number of snow days; more days in the colder months and none in summer.

The best time to visit Stanley

Given its varying weather conditions, the ideal time to visit Stanley highly depends on the preferred activities. For those who relish the warmth and sunshine, summer offers the most favorable conditions. From June to August, temperatures range between a pleasant 60.3°F (15.7°C) and 72.7°F (22.6°C), allowing travelers to enjoy a variety of outdoor pursuits under a relative humidity of just 44 to 45%. The sunshine hours during these months are the highest in the year, from 14.8 to 15.5 hours daily, with the sun shining for up to 11.8 hours.

The worst time to visit Stanley

While winter offers its unique charm and recreational opportunities like skiing, the harsh climatic conditions might not be appealing to all. Between December and February, Stanley experiences frigid temperatures, from 5.7°F (-14.6°C) to 25.9°F (-3.4°C), combined with heavy snowfall, particularly in January with around 16.26" (413mm). The days are also considerably shorter, with daylight hours ranging only from 8.9 to 10.5 hours, and considerably less sunshine, only 4.4 to 4.8 hours a day.

Spring weather in Stanley

As winter recedes, spring ushers in gradual warmth in Stanley from March till May. During this period, temperatures rise from a low of 12.2°F (-11°C) in March to a high of 48.6°F (9.2°C) by May. Nevertheless, despite this increase in temperatures, spring in Stanley coincides with a rise in rainfall, both in volumes and the number of rainy days. As a result, despite the moderate temperatures, visitors might have to prepare for a wet and damp spring season.

Summer weather in Stanley

Summers in Stanley, from June through August, are relatively mild and favorable for outdoor activities. With the mercury oscillating from 60.3°F (15.7°C) to 72.7°F (22.6°C), these are the warmest months. However, summer is also the driest season in Stanley, recording the least rain, making it the perfect companion for outdoor adventurers. Moreover, an average of 15 hours of daily daylight with more than 10 hours of sunshine makes summer an excellent season to explore Stanley.

Autumn weather in Stanley

Autumn presents a cooling trend, as temperatures gradually descend from 62.1°F (16.7°C) in September to 32.7°F (0.4°C) by November. Rainfall begins to increase, reaching a peak of 1.5" (38mm) in October. However, the daylight hours and sunshine continue to diminish progressively in this period, from 12.5 hours in September to 9.6 hours in November.

Winter weather in Stanley

Winters in Stanley, resided between December and February, are dominated by frigid temperatures, heavy snowfall, and shorter days. Temperatures average between 5.7°F (-14.6°C) and 25.9°F (-3.4°C) while snowfall exceeds 14" (356mm) each month. Additionally, the daylight lasts about 9.6 hours in December and dwindles to 8.9 hours in the shortest days of winter, making it more suited to winter sport enthusiasts who enjoy the snowy conditions.

Weather in January

January greets Stanley with the heart of winter, blanketing the town in heavy snow. The month holds the year's lowest average temperatures, from a chilly 5.7°F (-14.6°C) at night, to daytime high of only 25.9°F (-3.4°C) along with 14.69" (373mm) of snowfall in 17.3 days. Weather in January »

Weather in February

As winter continues in February, a slight respite from the chill of January is felt as the mercury inches upwards. February sees the highest snowfall of the year with 16.26" (413mm), spread across 19.9 snowy days. With relative humidity of 91%, conditions remain prime for snow. Weather in February »

Weather in March

The arrival of March brings a notable shift indicating the approach of spring. Although similar to February in terms of temperature and humidity, the amount of snowfall decreases to 15.67" (398mm) over 21.6 days. A noticeable increase in daylight hours and a slight rise in temperatures signal the pendulum swing towards warmer months. Weather in March »

Weather in April

April serves as a gateway to the warmer months in Stanley. The snowfall decreases further to 12.2" (310mm) occurring over a span of 17.6 days. A clear surge in temperature is experienced as spring takes hold. Residents witness late-season snowfall dancing around blooming flowers and greening lawns, creating a picturesque scene of simultaneous rebirth and closure to the cold months. The shift into April is characterized by a subtle rise in the average high-temperature, transitioning from March's freezing cold 30.9°F (-0.6°C) to a wintry 36.5°F (2.5°C). Weather in April »

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. Weather in May »

Weather in June

June in Stanley is a harbinger of summer. Temperatures continue to rise, peaking at 60.3°F (15.7°C) in the daytime. Rainfall replaces snow, maintaining the lush greenery grown in spring. The onset of summer months brings with it longer daylight hours and higher visibility, allowing for splendid views of the vibrant environment unveiled by the receding snow. With the onset of June, Stanley's average high-temperature experiences a rise, moving from May's frosty 48.6°F (9.2°C) to a refreshing 60.3°F (15.7°C). Weather in June »

Weather in July

July is Stanley's sunniest and warmest month, with daytime temperatures averaging a peak of 72.7°F (22.6°C). However, rain is scarce compared to previous months, with just 0.63" (16mm) over only 7.4 days. These long sun-filled days offer ample opportunities for outdoor activities, from hiking to fishing, igniting a sense of adventure within all inhabitants and visitors. Stanley records the warmest temperatures in July, averaging a high of 72.7°F (22.6°C) and a low of 43.3°F (6.3°C). Weather in July »

Weather in August

August almost mirrors July, continuing the trend of warm, sunny days and a sparse rainfall of 0.63" (16mm) across 7.6 days. The weather remains favorable for a variety of outdoor activities that are native to Stanley's summer. A consistent rise in the UV index demands proper sun protection for any adventurers heading outdoors. The onset of August notes an average high-temperature of a still pleasant 71.4°F (21.9°C), subtly shifted from July's 72.7°F (22.6°C). Weather in August »

Weather in September

September signifies the commencement of fall in Stanley. The landscape begins to shift its colours as temperatures start to decline, averaging 62.1°F (16.7°C) in the daytime. An increase in rainfall from the summer months rehydrates the environment preparing it for the upcoming cold months. Weather in September »

Weather in October

October witnesses a more pronounced drop in temperatures, reaching down to an average nighttime low of 26.1°F (-3.3°C). An increase in the number of rainy days from September to 10.2 days coupled with falling temperatures sets the stage for winter. Weather in October »

Weather in November

As November unfolds, the first signs of winter are sighted. With average high temperatures dipping to 32.7°F (0.4°C), the first layers of snow coat Stanley, with a snowfall of 9.88" (251mm) recorded. The once vibrant landscape starts to adopt a more monochromatic color scheme, and daylight hours shorten significantly, marking the return of the long winters unique to Stanley. As October shifts into November, a slight alteration in temperatures is observed, with average highs reducing from a chilly 45.5°F (7.5°C) to a cold 32.7°F (0.4°C). Weather in November »

Weather in December

By December, winter is in full swing in Stanley. In this month, cold temperatures linger between 5.4°F (-14.8°C) during the night to 23.9°F (-4.5°C) during the day. As the year winds down with an average snowfall of 16.77" (426mm) accompanied by the year's highest recorded rainfall of 2.09" (53mm), this snowy spectacle creates an ideal atmosphere for a white Christmas. Weather in December »

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

Frequently asked questions

How much does it rain?

Throughout the year, there are 98.2 rainfall days, and 19.25" (489mm) of precipitation is accumulated.

When does it snow?

January through June, September through December are months with snowfall.

How many days does it snow?

In Stanley, Idaho, during the entire year, snow falls for 131.3 days and aggregates up to 100.24" (2546mm) of snow.

What is the month with the least sunshine in Stanley?

The months with the least sunshine are January and December, with an average of 4.4h of sunshine.

What is the month with the lowest UV index?

The months with the lowest UV index are January through March and November, with an average maximum UV index of 1.

What are the most humid months?

The months with the highest humidity are February and March, with an average relative humidity of 91%.

What is the rainiest month?

The month with the most rainfall is March, when the rain falls for 6.9 days and typically aggregates up to 2.17" (55mm) of precipitation.

When is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.

When are the longest days?

June has the longest days of the year, with an average of 15h and 30min of daylight.

What part of the year is the hottest?

In Stanley, the average highest temperatures are observed in July, with a high of 72.7°F (22.6°C) and a low of 43.3°F (6.3°C).

What is the least humid month?

July is the least humid month in Stanley, with an average relative humidity of 44%.

What is the driest month?

July and August are months with the least rain when the rain falls for 7.4 days and typically aggregates up to 0.63" (16mm) of rain.

When it does not snow?

July and August are months without snowfall.

What month has the most sunshine?

The month with the most sunshine is July, with an average of 11.8h of sunshine.

When is the highest UV index?

The month with the highest UV index is July, with an average maximum UV index of 5.

What time of the year is the coldest?

With average high temperatures of 23.9°F (-4.5°C) and lows of 5.4°F (-14.8°C), December is the coldest month.

When does it snow the most?

December is the month with the most snowfall. Snow falls for 20.4 days and accumulates 16.77" (426mm) of snow.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 8h and 54min of daylight.

Average temperature
Stanley, ID

Average high temperature in January:
25.9°F
Average high temperature in February:
25.7°F
Average high temperature in March:
30.9°F
Average high temperature in April:
36.5°F
Average high temperature in May:
48.6°F
Average high temperature in June:
60.3°F

Average high temperature in July:
72.7°F
Average high temperature in August:
71.4°F
Average high temperature in September:
62.1°F
Average high temperature in October:
45.5°F
Average high temperature in November:
32.7°F
Average high temperature in December:
23.9°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 January:
5.7°F
Average low temperature in February:
7.2°F
Average low temperature in March:
12.2°F
Average low temperature in April:
16.5°F
Average low temperature in May:
27°F
Average low temperature in June:
35.2°F

Average low temperature in July:
43.3°F
Average low temperature in August:
43.2°F
Average low temperature in September:
36.5°F
Average low temperature in October:
26.1°F
Average low temperature in November:
14.4°F
Average low temperature in December:
5.4°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
Stanley, ID

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
Stanley, ID

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
Stanley, ID

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

Average rainfall
Stanley, ID

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
Stanley, ID

Average rainfall days in January:
3.1 days
Average rainfall days in February:
3.8 days
Average rainfall days in March:
6.9 days
Average rainfall days in April:
9.6 days
Average rainfall days in May:
16.3 days
Average rainfall days in June:
13.4 days

Average rainfall days in July:
7.4 days
Average rainfall days in August:
7.6 days
Average rainfall days in September:
9.5 days
Average rainfall days in October:
10.2 days
Average rainfall days in November:
6 days
Average rainfall days in December:
4.4 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
Stanley, ID

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

Average snowfall days
Stanley, ID

Average snowfall days in January:
17.3 days
Average snowfall days in February:
19.9 days
Average snowfall days in March:
21.6 days
Average snowfall days in April:
17.6 days
Average snowfall days in May:
7.6 days
Average snowfall days in June:
2.3 days

Average snowfall days in July:
0 days
Average snowfall days in August:
0 days
Average snowfall days in September:
1.5 days
Average snowfall days in October:
8 days
Average snowfall days in November:
15.1 days
Average snowfall days in December:
20.4 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 / Average sunshine
Stanley, ID

Average daylight in January:
9h and 2min
Average daylight in February:
10h and 3min
Average daylight in March:
12h and 0min
Average daylight in April:
13h and 3min
Average daylight in May:
14h and 5min
Average daylight in June:
15h and 3min

Average daylight in July:
15h and 1min
Average daylight in August:
14h and 0min
Average daylight in September:
12h and 3min
Average daylight in October:
11h and 0min
Average daylight in November:
9h and 4min
Average daylight in December:
8h and 5min

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 January:
4h and 2min
Average sunshine in February:
4h and 5min
Average sunshine in March:
5h and 1min
Average sunshine in April:
7h and 1min
Average sunshine in May:
9h and 4min
Average sunshine in June:
10h and 5min

Average sunshine in July:
11h and 5min
Average sunshine in August:
11h and 3min
Average sunshine in September:
9h and 0min
Average sunshine in October:
7h and 0min
Average sunshine in November:
5h and 2min
Average sunshine in December:
4h and 2min

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).

Average sunshine days
Stanley, ID

Average sunshine days in January:
13.9 days
Average sunshine days in February:
8.7 days
Average sunshine days in March:
8.3 days
Average sunshine days in April:
8.1 days
Average sunshine days in May:
9 days
Average sunshine days in June:
12.2 days

Average sunshine days in July:
20 days
Average sunshine days in August:
18.9 days
Average sunshine days in September:
18.2 days
Average sunshine days in October:
15.8 days
Average sunshine days in November:
13.7 days
Average sunshine days in December:
11.3 days

The month with the most sunshine days is July (20 days).
The month with the least sunshine days is April (8.1 days).

Average UV index
Stanley, ID

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March and November (UV index 1).

Average cloud cover
Stanley, ID

The month with the most cloud cover is February (Cloud cover 65).
The month with the least cloud cover is July (Cloud cover 12).

Average visibility
Stanley, ID

The months with the highest visibility are June, July, August, September and October (6mi).
The month with the lowest visibility is February (3mi).

Climate and monthly weather forecastStanley, ID

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