Climate and monthly weather forecast
Challis, ID

Weather in January

January, like December, is a freezing cold winter month in Challis, Idaho, with an average temperature varying between 8.1°F (-13.3°C) and 28.4°F (-2°C). In Challis, the average high-temperature in January is almost the same as in December - a still subzero cold 28.4°F (-2°C). Weather in January »

Weather in February

The last month of the winter, February, is also a subzero cold month in Challis, Idaho, with temperature in the range of an average high of 28.6°F (-1.9°C) and an average low of 9.1°F (-12.7°C). In Challis, the average high-temperature in February is essentially the same as in January - a still subzero cold 28.6°F (-1.9°C). Weather in February »

Weather in March

The first month of the spring, March, is a wintry month in Challis, Idaho, with temperature in the range of an average low of 18°F (-7.8°C) and an average high of 35.2°F (1.8°C). In Challis, the average high-temperature in March slightly increases from a freezing cold 28.6°F (-1.9°C) in February to a cold 35.2°F (1.8°C). Weather in March »

Weather in April

April, the same as March, is a wintry spring month in Challis, Idaho, with temperature in the range of an average high of 42.4°F (5.8°C) and an average low of 25°F (-3.9°C). In April, the average high-temperature slightly increases from 35.2°F (1.8°C) in March to a still cold 42.4°F (5.8°C). Weather in April »

Weather in May

The last month of the spring, May, is a fresh month in Challis, Idaho, with temperature in the range of an average high of 54.5°F (12.5°C) and an average low of 33.4°F (0.8°C). In May, the average high-temperature increases from a cold 42.4°F (5.8°C) in April to a cool 54.5°F (12.5°C). Weather in May »

Weather in June

June, the first month of the summer in Challis, is a comfortable month, with an average temperature fluctuating between 65.8°F (18.8°C) and 40.3°F (4.6°C). In June, the average high-temperature rises from a fresh 54.5°F (12.5°C) in May to an enjoyable 65.8°F (18.8°C). Weather in June »

Weather in July

July is a warm summer month in Challis, Idaho, with an average temperature varying between 76.6°F (24.8°C) and 47.3°F (8.5°C). With an average high-temperature of 76.6°F (24.8°C) and an average low-temperature of 47.3°F (8.5°C), July is the warmest month. Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Challis, Idaho, with an average temperature fluctuating between 75.4°F (24.1°C) and 47.8°F (8.8°C). In Challis, the average high-temperature in August is relatively the same as in July - a still warm 75.4°F (24.1°C). Weather in August »

Weather in September

September, the first month of the autumn in Challis, is still a comfortable month, with an average temperature ranging between max 65.7°F (18.7°C) and min 41.5°F (5.3°C). In September, the average high-temperature decreases from a moderately hot 75.4°F (24.1°C) in August to a comfortable 65.7°F (18.7°C). Weather in September »

Weather in October

October, like September, is another chilly autumn month in Challis, Idaho, with an average temperature fluctuating between 30.2°F (-1°C) and 49.6°F (9.8°C). In Challis, Idaho, the average high-temperature in October declines considerably from an enjoyable 65.7°F (18.7°C) in September to a chilly 49.6°F (9.8°C). Weather in October »

Weather in November

November, the last month of the autumn in Challis, is also a wintry month, with an average temperature varying between 18.9°F (-7.3°C) and 36.7°F (2.6°C). In November, the average high-temperature decreases from a chilly 49.6°F (9.8°C) in October to a cold 36.7°F (2.6°C). Weather in November »

Weather in December

The first month of the winter, December, is also a subzero cold month in Challis, Idaho, with an average temperature varying between 8.6°F (-13°C) and 26.1°F (-3.3°C). The coldest month is December, with an average high-temperature of 26.1°F (-3.3°C) and an average low-temperature of 8.6°F (-13°C). Weather in December »
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FAQ

How many days does it rain in Challis?

In Challis, during the entire year, the rain falls for 75.7 days and collects up to 6.38" (162mm) of precipitation.

When does it snow in Challis?

Months with snowfall in Challis, Idaho, are January through June, September through December.

How much does it snow in Challis?

In Challis, during the entire year, snow falls for 51.7 days and aggregates up to 18.62" (473mm) of snow.

What is the month with the least sunshine in Challis?

The month with the least sunshine in Challis is January, with an average of 5.8h of sunshine.

What is the month with the lowest UV index in Challis?

January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the most humid month in Challis?

The most humid month in Challis is February, with an average relative humidity of 87%.

When does it snow the most in Challis?

The month with the most snowfall is February, when snow falls for 9.4 days and typically aggregates up to 3.54" (90mm) of snow.

When is Daylight Saving Time (DST) in Challis?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from MDT to MST.

What is the rainiest month in Challis?

The month with the most rainfall is June, when the rain falls for 10.2 days and typically aggregates up to 1.1" (28mm) of precipitation.

When are the longest days in Challis?

With an average of 15h and 29min of daylight, June has the longest days of the year.

What are the months with the highest UV index in Challis?

June and July, with an average maximum UV index of 5, are months with the highest UV index.

What is the warmest month in Challis?

July is the warmest month in Challis, with an average high-temperature of 76.6°F (24.8°C) and an average low-temperature of 47.3°F (8.5°C).

What are the least humid months in Challis?

The months with the lowest humidity in Challis are July and August, with an average relative humidity of 38%.

What is the driest month in Challis?

July is the month with the least rainfall in Challis, Idaho. Rain falls for 4.7 days and accumulates 0.28" (7mm) of precipitation.

When it does not snow in Challis?

July and August are months without snowfall in Challis, Idaho.

What month has the most sunshine in Challis?

The month with the most sunshine in Challis, Idaho, is July, with an average of 11.9h of sunshine.

What is the coldest month in Challis?

December is the coldest month in Challis, with an average high-temperature of 26.1°F (-3.3°C) and an average low-temperature of 8.6°F (-13°C).

What is the month with the shortest days in Challis?

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

Average temperature
Challis, ID

Average temperature - Challis, ID

The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is December (26.1°F).

The month with the highest average low temperature is August (47.8°F).
The coldest month (with the lowest average low temperature) is January (8.1°F).

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Average pressure
Challis, ID

Average pressure - Challis, ID

The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed
Challis, ID

Average wind speed - Challis, ID

The windiest months (with the highest average wind speed) are June and July (5.7mph).
The calmest month (with the lowest average wind speed) is January (4.8mph).

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Average humidity
Challis, ID

Average humidity - Challis, ID

The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are July and August (38%).

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Average rainfall
Challis, ID

Average rainfall - Challis, ID

The wettest month (with the highest rainfall) is June (1.1").
The driest month (with the least rainfall) is July (0.28").

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Average rainfall days
Challis, ID

Average rainfall days - Challis, ID

The month with the highest number of rainy days is June (10.2 days).
The month with the least rainy days is January (3.8 days).

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Average snowfall
Challis, ID

Average snowfall - Challis, ID

The month with the highest snowfall is February (3.54").
The months with the least snowfall are July and August (0").

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Average snowfall days
Challis, ID

Average snowfall days - Challis, ID

The month with the highest number of snowfall days is December (10.1 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight / Average sunshine
Challis, ID

Average daylight / Average sunshine - Challis, ID

The month with the longest days is June (Average daylight: 15h and 29min).
The month with the shortest days is December (Average daylight: 8h and 54min).

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 48min).

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Average sunshine days
Challis, ID

Average sunshine days - Challis, ID

The month with the most sunshine days is July (24.1 days).
The months with the least sunshine days are March and April (17.2 days).

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Average UV index
Challis, ID

Average UV index - Challis, 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, March, April, October, November and December (UV index 2).

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Average visibility
Challis, ID

Average visibility - Challis, 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).

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