Climate and monthly weather forecast
Hailey, ID


The climate of Hailey

Geographically situated in the state of Idaho, Hailey experiences what is classified as a subarctic, subalpine climate according to the Köppen Climate Classification system, making this city a destination that sees vast seasonal changes throughout the year.

Over the seasonal cycle, temperatures fluctuate between a frigid low of 9.5°F (-12.5°C) in January to a warm high of 77.7°F (25.4°C) by July. Humidity levels also show variation, with the lowest relative humidity at 34% during August and the highest at 86% in February. The amount of rainfall changes from month to month too with scanty rainfall in July, increasing to 1.77" (45mm) in February.

Noteworthy is the snowfall experienced in Hailey. From January to December, monthly snowfall varies from a maximum of 13.74" (349mm) in February to a negligible 0.08" (2mm) in September. Snowfall is a common occurrence with the most snow days in January (14.2 days) and the least in June with only a fraction of a day.

Daylight hours also undergo a predictable shift, shrinking from 15.4 hours in June to 9 hours in December. In contrast, the amount of sunshine received fluctuates less dramatically, with the longest sunny hours of 12.1 in July and the shortest, 5.6 hours, in January.

The best time to visit Hailey

For visitors seeking milder weather, the best time to visit Hailey would be between June and August. During this period, temperatures range from a comfortable 55.9°F (13.3°C) to 77.7°F (25.4°C). Apart from the pleasant temperature, the area also experiences the longest days, with daylight spanning from 14.7 hours to 15.4 hours. The rainfall is at its lowest point while sun shines for up to 12.1 hours daily, making these months great for outdoor activities.

The worst time to visit Hailey

Travellers looking to avoid harsh weather conditions should consider steering clear of Hailey from December to February. This period is marked by the coldest temperatures, falling between 9.5°F (-12.5°C) to 28.2°F (-2.1°C), and the shortest amount of daylight, ranging from 9 hours to 10.5 hours. Additionally, the rainfall amounts are at their peak and snowfall is prevalent reaching up to 13.74" (349mm) in February.

Spring weather in Hailey

From March to May, spring in Hailey brings about a gradual increase in temperatures, with lows rising from 19.6°F (-6.9°C) to 36.1°F (2.3°C) and highs from 34.5°F (1.4°C) to 55.9°F (13.3°C). Consistent with this warm up, the rainfall also increases marginally, reaching 1.22" (31mm) by May. The days get longer across this season, culminating in 14.7 hours of daylight in May, along with extended sunshine hours from 7 hours to 10.9 hours.

Summer weather in Hailey

Experiencing temperatures from 43.2°F (6.2°C) to 77.7°F (25.4°C), summer days in Hailey, which last from June to August, are the longest and sunniest. Daylight extends up to 15.4 hours in June while the sun shines bright for 12.1 hours in July. The period witnesses less frequent rainfall, with only 0.2" (5mm) in July. This season also holds the lowest relative humidity, presenting a refreshing change from the humid spring.

Autumn weather in Hailey

Autumn, stretching from September to November, sees a reversal in temperature trends with lows dropping from 45.7°F (7.6°C) to 20.5°F (-6.4°C) and highs from 66.9°F (19.4°C) to 36.5°F (2.5°C). Rainfall gradually increases over these months, reaching 0.94" (24mm) in November. A decrease in daylight hours from 12 hours to 9.7 hours is also noted, accompanied by less sunshine, decreasing from 9.5 hours to 6.7 hours.

Winter weather in Hailey

Wintering in Hailey from December till February can be a frosty affair, with temperatures plummeting to a chilling 9.5°F (-12.5°C) and only rising to a high of 28.2°F (-2.1°C). Witnessing the shortest daylight hours, December sees just 9 hours of it. Rainfall is at its peak during these months, measuring up to 1.77" (45mm) in February even as snowfall tallies its highest amounts, with February recording a substantial 13.74" (349mm). The UV index is at its lowest and the wind speed peaks to a gusty 5.2mph (8.4km/h).

Weather in January

Hailey, Idaho, observes the beginning of the year with substantial cold and frequent snowfall. The temperature drops sharply and a thick snow blanket often covers the landscape. Highs of 27.9°F (-2.3°C) and lows of 9.5°F (-12.5°C) dominate the month, requiring residents and visitors to bundle up well against the chill. Weather in January »

Weather in February

As February approaches, Hailey experiences a slight increase in temperature without a significant reduction in snowfall. With 14.1 snowy days recorded, February maintains the charm of a wintry Utah sequence. Despite the increase in temperature, snow remains the primary form of precipitation in February with 13.74" (349mm) of accumulated snowfall, fostering a winter wonderland. Weather in February »

Weather in March

Moving into March, Hailey witnesses the departure of extreme winter conditions. Temperatures start rising slowly, conferring a less abrasive cold compared to previous months. The maximum temperature soars to 34.5°F (1.4°C), signaling the commencement of the end of winter. Weather in March »

Weather in April

April introduces the prominent arrival of spring in Hailey, Idaho. The significant difference in April’s weather is in the transition from solid snowfall to a rather liquid precipitation form. The warmer weather fuels the snow melt, reducing the number of snow-days to 6.3. Weather in April »

Weather in May

May is the period when Hailey awakens fully from the long winter slumber. The warmer temperature encourages budding flowers and greening landscapes, infusing locals and tourists with renewed energy. An increment in sunlight fuels the transformation from the chilly winter to a bountiful spring season. Weather in May »

Weather in June

In June, Hailey embraces the warmth of a well-earned summer. The transition from the chilly conditions that dominated the city moves toward hotter temperatures. The month is characterized by high sunshine hours, owing to the increased daylight time. Weather in June »

Weather in July

July occupies the hot seat, wearing the crown of the warmest month in Hailey with highs peaking at 77.7°F (25.4°C). Long sunny days define this peak summer month, showcasing a stark contrast to the January chill. Residents relish the beautiful weather, taking full advantage of the sunshine. Weather in July »

Weather in August

August heralds the tail-end of summer in Hailey, with temperatures remaining considerably high. The persistence of warmth from July prevails, blesses the city with glorious weather. While the temperature marginally recedes from July, the city still basks in the warmth of summer days. Weather in August »

Weather in September

September marks a significant turning point in the year for Hailey, with weather conditions slowly transitioning toward a cooler autumn. As summer slowly cedes to autumn, the temperature drops, and the leaves begin to change color. Weather in September »

Weather in October

October brings a distinct chill in the air in Hailey, marking the deeper slide into autumn. The crisp autumn weather starts to lean towards winter, with nature displaying a plethora of colors in the dwindling autumn scenery. Celestial events hold a special charm in October, with clear skies enhancing the stargazing experience. Weather in October »

Weather in November

November possesses a clear shift from the mild autumn to the arrival of winter in Hailey. With cold temperatures settling in, the city prepares for the first snowfall of the season. While the onset of winter is celebrated, the tranquil season of autumn tearfully bids goodbye. Weather in November »

Weather in December

December in Hailey, Idaho, means the return of wintry weather, frosty landscapes, and festive cheer. Snowflakes dance in the skies and transform the city into a winter wonderland. Heaviest snowfall of 11.26" (286mm) and coldest temperatures with lows of 10.2°F (-12.1°C) indicate that winter has fully set in. Weather in December »

Frequently asked questions

How many days does it rain?

Throughout the year, there are 85.1 rainfall days, and 12.01" (305mm) of precipitation is accumulated.

When does it snow?

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

How many days does it snow?

In Hailey, during the entire year, snow falls for 72.5 days and aggregates up to 57.05" (1449mm) of snow.

What is the month with the least sunshine?

January has the least sunshine of the year, with an average of 5.6h of sunshine.

What is the most humid month?

February is the most humid month, with an average relative humidity of 86%.

What is the wettest month?

The month with the most rainfall is February, when the rain falls for 7.1 days and typically aggregates up to 1.77" (45mm) of precipitation.

What is the snowiest month?

February is the month with the most snowfall. Snow falls for 14.1 days and accumulates 13.74" (349mm) of snow.

When is the lowest UV index?

The month with the lowest UV index is February, with an average maximum UV index of 1.

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 it does not snow?

June through August are months without snowfall.

When are the longest days?

June has the longest days of the year, with an average of 15h and 24min of daylight.

What is the warmest month?

With average high temperatures of 77.7°F (25.4°C) and lows of 52.3°F (11.3°C), July is the warmest month.

What is the driest month?

The month with the least rainfall is July, when the rain falls for 3.7 days and typically collects 0.2" (5mm) of precipitation.

What month has the most sunshine?

The month with the most sunshine is July, with an average of 12.1h of sunshine.

When is the highest UV index?

The month with the highest UV index is July, with an average maximum UV index of 6.

What is the least humid month in Hailey?

With an average relative humidity of 34%, August is the least humid month.

What are the coldest months?

The lowest temperatures are recorded in December, with averages reaching a high of 25.7°F (-3.5°C) and a low of 10.2°F (-12.1°C).

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 0min of daylight.

Average temperature
Hailey, ID

Average temperature - Hailey, ID

The warmest month (with the highest average high temperature) is July (77.7°F).
The month with the lowest average high temperature is December (25.7°F).

The months with the highest average low temperature are July and August (52.3°F).
The coldest month (with the lowest average low temperature) is January (9.5°F).

Average pressure
Hailey, ID

Average pressure - Hailey, ID

The month with the highest atmospheric pressure is January (30.28"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

Average wind speed
Hailey, ID

Average wind speed - Hailey, ID

The windiest month (with the highest average wind speed) is July (7.3mph).
The calmest month (with the lowest average wind speed) is December (4.7mph).

Average humidity
Hailey, ID

Average humidity - Hailey, ID

The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is August (34%).

Average rainfall
Hailey, ID

Average rainfall - Hailey, ID

The wettest month (with the highest rainfall) is February (1.77").
The driest month (with the least rainfall) is July (0.2").

Average rainfall days
Hailey, ID

Average rainfall days - Hailey, ID

The month with the highest number of rainy days is May (12.8 days).
The month with the least rainy days is August (3.4 days).

Average snowfall
Hailey, ID

Average snowfall - Hailey, ID

The month with the highest snowfall is February (13.74").
The months with the least snowfall are June, July and August (0").

Average snowfall days
Hailey, ID

Average snowfall days - Hailey, ID

The month with the highest number of snowfall days is December (14.2 days).
The months with the least snowfall days are July and August (0 days).

Average daylight / Average sunshine
Hailey, ID

Average daylight / Average sunshine - Hailey, ID

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).

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).

Average sunshine days
Hailey, ID

Average sunshine days - Hailey, ID

The month with the most sunshine days is August (25.8 days).
The month with the least sunshine days is April (12.4 days).

Average visibility
Hailey, ID

Average visibility - Hailey, ID

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).

Hailey, Idaho, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location