Climate and monthly weather forecast
Island Park, ID

Share

The climate of Island Park

Island Park, Idaho, USA, is nestled within a Humid Continental Climate zone according to the Köppen Climate Classification, denoted by the code Dfb. This translates to no dry season, warm summers, and severe winters. Both temperature and precipitation levels demonstrate significant variation throughout the year.

Annual temperatures in Island Park present a wide range. Chilled winter months record lows of 6.8°F (-14°C) in January and December, while balmy summer days in July reach a peak of 77.4°F (25.2°C). A shifting pattern is identifiable in this zone, as the year progresses from chillier months to warmer periods.

Examining precipitation, there are alternatively months of high rainfall, nearing to 2.64" (67mm) in February, and periods of relative dryness, dropping to 0.47" (12mm) in July. Snowfall is another crucial characteristic of this area, with January and December witnessing the highest snowfall measurements, reaching 19.84 and 16.5" (419mm) respectively. Furthermore, the plentiful cloud cover over Island Park plays a considerable role in its climate, with the highest saturation, 67%, occuring in February and lowest in July, only 13%.

Another distinguishing feature of the Island Park climate is its wind pattern. Wind speeds on average range from 4.4mph (7.1km/h) in January to 6.3mph (10.1km/h) in June, and occasionally experience gusts reaching up to 9.3mph (15km/h) in June.

The Best Time to Visit Island Park

For outdoor enthusiasts and visitors seeking fair weather, the best period to visit Island Park would be from June to September. During these months, the temperature averages from 42.4°F (5.8°C) to 77.4°F (25.2°C). Also, these months provide increased visibility, with clarity extending to 6 miles which makes it ideal for sightseeing.

Additionally, there are longer hours of daylight during this period, from 13.5 hours in April to a peak of 15.5 hours in June. Correspondingly, the sunshine duration is considerable, escalating to a substantial 12 hours in July. Weather conditions in this duration are conducive for an array of outdoor activities.

The Worst Time to Visit Island Park

Travel plans to Island Park between December and February might warrant reconsideration, as these are the coldest months, with temperatures sinking to lows of 6.8°F (-14°C). Additionally, snowfall escalates during these months, indicating restricted visibility, harsh travel conditions, and potential closures of outdoor attractions.

These months also carry the highest relative humidity measurements, reaching 92% to 94%, heightening the feeling of cold. Considering the reduced daylight hours, from 8.9 in December to 10.5 in February, and cloud cover peaking at 67% in February, the weather might not be ideal for outdoor exploration.

Spring Weather in Island Park

Spring in Island Park, from March to May, signifies a transition phase from the severe cold to relative warmth. Temperatures during these months range from 16.9°F (-8.4°C) to 55.9°F (13.3°C). Daylight extends from 12 hours in March to 14.8 hours in May, offering ample opportunity for outdoor pursuits.

Meanwhile, this season witnesses a decrease in the frequency of snowfall days, reducing to 5.7 in May from 22.8 in March. Rainfall also follows a moderate pattern, with 17 rainfall days noted in May. Visitors during this time can expect increasing warmth, but must be prepared for occasional rain showers.

Summer Weather in Island Park

Summer, from June till August, arrives with increased warmth and extended daylight hours in Island Park. The region experiences temperatures climbing from 66°F (18.9°C) in June to a high of 77.4°F (25.2°C) in July, before slightly dropping to 75.7°F (24.3°C) in August. The number of sunshine hours also peak in July at 12 hours, providing optimal conditions for outdoor activities.

Rainfall is relatively low compared to other seasons, with the dryest month being July at 0.47" (12mm). This is a season marked by low cloud cover, hovering around 13% in July and 14% in August, combined with increased visibility of 6 miles, making this an excellent time for trekking, camping, or wildlife spotting.

Autumn Weather in Island Park

Autumn, extending from September to November, symbolizes a season of change in Island Park. Average temperatures begin to drop, decreasing from 65.8°F (18.8°C) in September to 33.1°F (0.6°C) in November. The daylight hours consequently start to lessen, from 12.5 hours in September to 9.6 hours by November.

While the frequency of rainfall days remains relatively steady around 8 days per month, November witnesses an increase in snowfall, escalating to 10.75" (273mm). Therefore, autumn visitors should come equipped for crisp days and potentially snowy conditions.

Winter Weather in Island Park

Winter in Island Park, from December through February, is typified by freezing cold temperatures dipping to 6.8°F (-14°C), high relative humidity levels breaching 94%, ample snowfall, and limited daylight. Snowfall in December and January reaches a high of 19.84" (504mm) and 19.76" (502mm), respectively.

Daylight hours during these freezing months shrink to only 8.9 hours in December, increasing slightly to 10.5 hours in February. The winter season also marks the highest cloud cover, peaking at 64% in December, and bolstering the chilly atmosphere. Despite the severe weather, it is a great period for enthusiasts of winter sports such as skiing or snowboarding.

Weather in January

Island Park in Idaho greets the new year with cold and snowy weather. January is nestled firmly in the winter season, with lower temperatures than those in surrounding months, from lows of 6.8°F (-14°C) to highs of 24.1°F (-4.4°C). Weather in January »

Weather in February

Island Park in February experiences a gradual shift in weather as winter continues. The temperature increases slightly from the previous month, making it relatively warmer. The chilly conditions persist, however, with frosty mornings and cold nights. Weather in February »

Weather in March

March, the first month of the spring in Island Park, is a wintry month, with temperature in the range of an average low of 16.9°F (-8.4°C) and an average high of 32.9°F (0.5°C). In Island Park, the onset of March comes with a modest high-temperature shift, transitioning from February's freezing cold 25.2°F (-3.8°C) to an icy 32.9°F (0.5°C). Weather in March »

Weather in April

As the season shifts to spring in April, Island Park experiences a significant rise in temperatures. The weather starts to become comparatively mild with more daylight hours and the disappearance of winter's thick snow-cover. Snowfall drops sharply from 16.69" (424mm) to 12.64" (321mm). Weather in April »

Weather in May

In Island Park, May is characterized by spring in full swing. The trees are lush and green, and the days continue to become longer and warmer, replacing the earlier frigid weather. The city landscape flourishes with vibrant colors as flowers blossom, complemented by the substantial increase in sunshine hours. Weather in May »

Weather in June

Island Park’s June weather marks the intersection of spring and the beginning of summer. With the mercury rising, the weather takes a decidedly warm turn, leading to more outdoor activities. There's a clear reduction in humidity from 67% to 61% and a further drop in rainfall. Weather in June »

Weather in July

Experiencing the highest average temperatures of the year, between 46°F (7.8°C) and 77.4°F (25.2°C), July is the hottest month in Island Park. The summer season is in its peak, with the most extended daylight hours and the maximum sunshine hours. Weather in July »

Weather in August

August's weather in Island Park shows summer still holding its sway but subtly hinting at the upcoming autumn. Temperatures decrease slightly from July’s highs while maintaining their summer warmth. Though summer stands its ground, the gradually shortening daylight hours indicate a subtle shift towards fall. Weather in August »

Weather in September

In Island Park, September is a blend of lingering summer warmth and the incoming cooler temperatures of autumn. Days remain relatively warm, but nights become increasingly chilly as the month progresses. A visible increase in rainfall, from 0.71" (18mm) to 1.14" (29mm), and a decrease in temperature is a clear herald of autumn's onset. Weather in September »

Weather in October

As October progresses, autumn in Island Park evolves into a charming season with a splendid display of fall foliage. A brisk chill enters the air, as temperatures drop dramatically from those witnessed in September. The increased rainfall catalyzes the transformation of green landscapes into varying hues of rust and gold. Weather in October »

Weather in November

November showcases Island Park transitioning from autumn to winter. The city’s weather displays a striking shift, as the temperatures plunge even further, ushering in a distinctly cooler climate. The first snow of winter often arrives, gradually blanketing the cityscape in white. Weather in November »

Weather in December

December in Island Park is characterized by the full swing of winter, and the weather forecast predicts it to be cold and snowy. The city experiences the lowest average temperatures, from 6.8°F (-14°C) to 22.3°F (-5.4°C), and observes high snowfall of 16.5" (419mm). Weather in December »
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the most humid months in Island Park?

January and February, with an average relative humidity of 94%, are most humid months.

How much does it rain in Island Park?

Throughout the year, there are 106.1 rainfall days, and 20.83" (529mm) of precipitation is accumulated.

When does it snow in Island Park?

January through July, September through December are months with snowfall in Island Park.

What is the snowiest month in Island Park?

The month with the most snowfall in Island Park is January, when snow falls for 21.8 days and typically aggregates up to 19.84" (504mm) of snow.

How many days does it snow in Island Park?

Throughout the year, in Island Park, Idaho, there are 138.1 snowfall days, and 107.64" (2734mm) of snow is accumulated.

What is the month with the least sunshine in Island Park?

January has the least sunshine of the year, with an average of 3.8h of sunshine.

What is the month with the lowest UV index in Island Park?

The months with the lowest UV index in Island Park are January, February, November and December, with an average maximum UV index of 1.

What is the wettest month in Island Park?

February is the month with the most rainfall. Rain falls for 5.2 days and accumulates 2.64" (67mm) of precipitation.

When is Daylight Saving Time (DST) in Island Park?

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 in Island Park?

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

When is the highest UV index in Island Park?

The months with the highest UV index in Island Park, Idaho, are June and July, with an average maximum UV index of 5.

What is the hottest time of year in Island Park?

With average high and low temperatures of 77.4°F (25.2°C) and 46°F (7.8°C) respectively, July is Island Park's warmest month.

What is the driest month in Island Park?

July is the month with the least rainfall. Rain falls for 6.8 days and accumulates 0.47" (12mm) of precipitation.

What month has the most sunshine in Island Park?

With an average of 12h of sunshine, July has the most sunshine of the year.

What is the least humid month in Island Park?

With an average relative humidity of 47%, August is the least humid month.

When it does not snow in Island Park?

The only month without snowfall is August.

What is the coldest month in Island Park?

Island Park's temperature records reveal December as the coldest month, marked by average highs of 22.3°F (-5.4°C) and lows of 6.8°F (-14°C).

What is the month with the shortest days in Island Park?

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

Average temperature
Island Park, ID

Average temperature - Island Park, ID

The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is December (22.3°F).

The month with the highest average low temperature is August (46.6°F).
The coldest months (with the lowest average low temperature) are January and December (6.8°F).

Average pressure
Island Park, ID

Average pressure - Island Park, ID

The month with the highest atmospheric pressure is January (30.26"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed
Island Park, ID

Average wind speed - Island Park, ID

The windiest month (with the highest average wind speed) is June (6.3mph).
The calmest month (with the lowest average wind speed) is January (4.4mph).

Average humidity
Island Park, ID

Average humidity - Island Park, ID

The months with the highest relative humidity are January and February (94%).
The month with the lowest relative humidity is August (47%).

Average rainfall
Island Park, ID

Average rainfall - Island Park, ID

The wettest month (with the highest rainfall) is February (2.64").
The driest month (with the least rainfall) is July (0.47").

Average rainfall days
Island Park, ID

Average rainfall days - Island Park, ID

The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is January (3.8 days).

Average snowfall
Island Park, ID

Average snowfall - Island Park, ID

The month with the highest snowfall is January (19.84").
The month with the least snowfall is August (0").

Average snowfall days
Island Park, ID

Average snowfall days - Island Park, ID

The month with the highest number of snowfall days is December (23 days).
The month with the least snowfall days is August (0 days).

Average daylight / Average sunshine
Island Park, ID

Average daylight / Average sunshine - Island Park, ID

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).

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days
Island Park, ID

Average sunshine days - Island Park, ID

The month with the most sunshine days is July (21.2 days).
The month with the least sunshine days is February (5.9 days).

Average UV index
Island Park, ID

Average UV index - Island Park, ID

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

Average visibility
Island Park, ID

Average visibility - Island Park, ID

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).

Island Park, Idaho, USA

Weather forecast for your location

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