Climate and monthly weather forecast
Salmon, ID

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Bright yellow trees along the shores of the iconic Salmon River in Salmon, Idaho
Bright yellow trees along the shores of the iconic Salmon River in Salmon, Idaho

The climate of Salmon

Salmon, Idaho experiences a climate classified as Dfb according to the Köppen-Geiger climate classification system. Located in North America, this implies a humid continental climate, marked by warm summers and a season absent of drought.

Average monthly high temperatures vary greatly in Salmon, fluctuating from 25.2°F (-3.8°C) in December to a toasty 75.7°F (24.3°C) in the month of July. This significant annual fluctuation is augmented by the astounding breadth in low temperatures, which shows a similar trend, reaching the year's lowest temperature at 9.5°F (-12.5°C) in December and January but escalating to a very comfortable 47.5°F (8.6°C) in July and August.

The month of July experiences the lowest relative atmospheric humidity, merely 44%, which then hikes up to 89% by February. The amount of precipitation received also sees a wide variance, with maximum monthly rainfall observed in May , with a total of 2.05" (52mm). In stark contrast, July and August are the driest months, receiving merely half an inch of rainfall. The city witnesses snowfall from October to April, peaking in February with an average snow depth of 5" (127mm). The amount of snow received shows a progressive reduction from November to April after reaching the annual peak in February.

The best time to visit Salmon

The ideal time to visit Salmon is arguably during the months between May and September. This period aligns with the warmest months, yielding highs between 54.1°F (12.3°C) and 75.7°F (24.3°C). The lowest precipitation occurs from July to September, with average rainfall ranging from 0.51" (13mm) to 0.94" (24mm). These months also boast generous sunshine, garnering between 9.4 hours and 11.8 hours of sunlight per day ensuring pleasant conditions for exploring the city and surrounding areas. Moreover, wind speeds maintain a steady range from 4.5mph (7.2km/h) to 4.7mph (7.6km/h), well within comfortably calm ranges for any outdoor activities.

The worst time to visit Salmon

The least appealing time for touristic visits to Salmon would be from November to March. This season is marked by glaring harshness of winter, with average high temperatures dropping to the range from 25.2°F (-3.8°C) to 34°F (1.1°C). Corresponding lows during this period hover between 9.5°F (-12.5°C) and 17.8°F (-7.9°C). In addition, snowfall reaches maximum levels, with upto 5" (127mm) observed in January and February, making travel potentially challenging. The visibility gets limited to a mere 4 miles which combined with the low levels of daylight ranging from 8.8 hours to 10.5 hours, make outdoor can venture a less enticing choice.

Spring weather in Salmon

The spring months of March, April and May transition smoothly from the harsh winters and bring with them a significant change in all weather parameters. Average high temperatures see a robust increase from 34°F (1.1°C) in March to a comfortable 54.1°F (12.3°C) by May, while low temperatures also show similar trends, transitioning from 17.8°F (-7.9°C) to 33.8°F (1°C). April also happens to bring the highest precipitation, with 1.61" (41mm) of rainfall complemented by 3.39" (86mm) of snowfall. Daylight is also amplified, growing from 12 hours per day in March, reaching 14.9 hours a day in May.

Summer weather in Salmon

Summer typically spans June, July and August, and the weather conditions are rather accommodating for tourism. High temperatures range from 64.4°F (18°C) to 75.7°F (24.3°C), making it the warmest period in Salmon. Nightly lows hover between 39.9°F (4.4°C) in June to 47.5°F (8.6°C) in August, ensuring a comfortable and enjoyable end to long sunny days. The amount of sunshine received is the highest for the year and extends from 11.2 hours per day to 11.8 hours per day. Rainfall decreases over this period, with July and August receiving the least amount of rain for the year at just 0.51" (13mm).

Autumn weather in Salmon

The autumn months of September, October and November maintain a mild climate, with high temperatures dropping gradually from apleasant 65.3°F (18.5°C) in September to a chilly 35.2°F (1.8°C) in November. The lower temperatures also decline from 40.6°F (4.8°C) to 19.2°F (-7.1°C) during these months. Rainfall increases over the period, culminating to 1.1" (28mm) in October. Autumn also marks the initiation of the snowfall season with November witnessing an average of 2.32" (59mm) of snowfall.

Winter weather in Salmon

Winter is the coldest season for Salmon, Idaho, spanning December, January and February. Average highs and lows both experienced during these months are the lowest for any point during the year, ranging from 25.2°F (-3.8°C) to 27.3°F (-2.6°C) and 9.5°F (-12.5°C) to 10.8°F (-11.8°C) respectively. These months also record the highest average snowfall for the year, with 5" (127mm) in February being the maximum. In stark contrast, the hours of daylight in winter are significantly lessened, falling to an annual minimum of 8.8 hours in December.

Weather in January

Salmon, Idaho, rings in the new year in traditionally winter fashion, with sub-zero temperatures, snowy days, and decreased daylight hours. Outdoor enthusiasts can revel in the snowy landscapes and participate in winter sports. Weather in January »

Weather in February

Barely discernible from its predecessor, February in Salmon picks up where January left off. The city continues to be a winter wonderland, ideal for skiing and snowboarding. However, snowfall is usually slightly more copious during this month, reaching up to 5" (127mm). Weather in February »

Weather in March

The onset of Spring in March brings with it a transition in the weather dynamics of Salmon. The city begins to defrost; the snow starts to melt, and mild showers take over. The rainfall averages approximately 1.06" (27mm), a relatively high mark in the similar context. Weather in March »

Weather in April

April ushers in a pronounced shift in the weather, natural scenery of Salmon starts to morph from wintry white to springtime green. The warmer climes become more prominent, and rainfall is more regular with spring showers. The temperatures span approximately from 25°F (-3.9°C) to 41.9°F (5.5°C), exhibiting a noticeable incline compared to March. Weather in April »

Weather in May

May in Salmon paves the way for a complete transition from spring to early summer. Substantial changes in the weather pattern offer warmer temperatures and increased daylight hours, making it perfect for multiple outdoor activities. Weather in May »

Weather in June

June marks the official beginning of summer in Salmon, with an overall surge in temperatures. This month presents an ideal opportunity for water activities as the town's rivers and lakes provide a cool respite from the heat. June's temperature reaches a comfortable average high of 64.4°F (18°C). Weather in June »

Weather in July

Articulating the summer spirit in full swing, July in Salmon brings with it warm temperatures, extended daylight hours and low precipitation. Outdoor enthusiasts can enjoy hiking, fishing, and rafting amidst the city's beautiful landscapes. Weather in July »

Weather in August

August exhibits an extension of summer heat with a slight hint of coming autumn towards the end of the month. Salmon in August is packed full of sunny days that beckon outdoor enthusiasts to the city's parks and trails. As July waves goodbye, August considers it a signal to withhold the high temperatures around 74.7°F (23.7°C). Weather in August »

Weather in September

September is synonymous with the arrival of fall in Salmon, featuring a transition from warm, sunny days to cool, crisp nights. The majestic fall foliage together with the cooling temperatures make it an inviting month for outdoor activities. Weather in September »

Weather in October

October encapsulates the essence of fall with plummeting temperatures and visually pleasing fall foliage—activities shift indoors as the weather in Salmon, Idaho, gets colder. The moderately chilly weather hovers around 48.7°F (9.3°C), hinting at the forthcoming winter season. Weather in October »

Weather in November

November is distinctive in Salmon's weather tale as it marks the transition from autumn to winter. It encapsulates chilly breezes, occasional snowfall, and an overall decrease in temperatures. Showcasing an amplified chilliness, November's temperatures fluctuate from 19.2°F (-7.1°C) to 35.2°F (1.8°C). Weather in November »

Weather in December

December heralds the true arrival of winter with cold temperatures, increased snowfall and reduced daylight hours. The landscapes of Salmon transform into a winter paradise, making it an ideal destination for winter sports. Known for exhibiting a significant drop in mercury levels, typical temperatures in December range from 9.5°F (-12.5°C) to 25.2°F (-3.8°C). Weather in December »
Updated: Jul 20, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How many days does it rain?

In Salmon, during the entire year, the rain falls for 129.5 days and collects up to 12.4" (315mm) of precipitation.

When does it snow?

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

How many days does it snow?

In Salmon, Idaho, during the entire year, snow falls for 63.5 days and aggregates up to 22.76" (578mm) of snow.

What is the month with the least sunshine?

January has the least sunshine of the year, with an average of 5.1h of sunshine.

When is the lowest UV index?

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

What is the most humid month?

With an average relative humidity of 89%, February is the most humid month in Salmon, Idaho.

When does it snow the most?

The month with the most snowfall in Salmon is February, when snow falls for 12.3 days and typically aggregates up to 5" (127mm) of snow.

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.

What is the rainiest month?

The month with the most rainfall is June, when the rain falls for 14.9 days and typically aggregates up to 2.05" (52mm) of precipitation.

When it does not snow?

In Salmon, Idaho, snow does not fall in June through August.

When are the longest days?

June has the longest days of the year, with an average of 15h and 36min of daylight.

What are the warmest months?

July, recording an average high temperature of 75.7°F (24.3°C) and a low temperature of 47.3°F (8.5°C), is Salmon's warmest month.

What is the driest month in Salmon?

The months with the least rainfall are July and August Rain falls for 7.8 days and accumulates 0.51" (13mm) of rain.

What month has the most sunshine?

With an average of 11.8h of sunshine, July has the most sunshine of the year.

When is the highest UV index in Salmon?

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

What is the least humid month in Salmon?

August is the least humid month, with an average relative humidity of 43%.

What month is the coldest?

Salmon's coldest temperatures are experienced in December, with average high temperatures of 25.2°F (-3.8°C) and lows of 9.5°F (-12.5°C).

What is the month with the shortest days?

With an average of 8h and 48min of daylight, December has the shortest days of the year.
Today
Tomorrow
Long-term
YearJFMAMJJASOND

Average temperature
Salmon, ID

Average temperature - Salmon, ID

The warmest month (with the highest average high temperature) is July (75.7°F).
The month with the lowest average high temperature is December (25.2°F).

The month with the highest average low temperature is August (47.5°F).
The coldest months (with the lowest average low temperature) are January and December (9.5°F).

Average pressure
Salmon, ID

Average pressure - Salmon, ID

The month with the highest atmospheric pressure is January (30.25"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed
Salmon, ID

Average wind speed - Salmon, ID

The windiest months (with the highest average wind speed) are March and April (5.2mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).

Average humidity
Salmon, ID

Average humidity - Salmon, ID

The month with the highest relative humidity is February (89%).
The month with the lowest relative humidity is August (43%).

Average rainfall
Salmon, ID

Average rainfall - Salmon, ID

The wettest month (with the highest rainfall) is June (2.05").
The driest months (with the least rainfall) are July and August (0.51").

Average rainfall days
Salmon, ID

Average rainfall days - Salmon, ID

The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is January (6.3 days).

Average snowfall
Salmon, ID

Average snowfall - Salmon, ID

The month with the highest snowfall is February (5").
The months with the least snowfall are June, July and August (0").

Average snowfall days
Salmon, ID

Average snowfall days - Salmon, ID

The month with the highest number of snowfall days is February (12.3 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight / Average sunshine
Salmon, ID

Average daylight / Average sunshine - Salmon, ID

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).

Average sunshine days
Salmon, ID

Average sunshine days - Salmon, ID

The month with the most sunshine days is July (19.4 days).
The month with the least sunshine days is April (7.7 days).

Average UV index
Salmon, ID

Average UV index - Salmon, ID

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

Average cloud cover
Salmon, ID

Average cloud cover - Salmon, ID

The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 13).

Average visibility
Salmon, ID

Average visibility - Salmon, 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, March and December (4mi).

Salmon, Idaho, USA

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