Challis
Idaho, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Challis, ID

January, the same as December, in Challis, Idaho, is another subzero cold winter month, with average temperature fluctuating between 28.4°F (-2°C) and 12.4°F (-10.9°C). In Challis, the average high-temperature is practically the same as in December - a still subzero cold 28.4°F (-2°C). Weather in January »

The last month of the winter, February, is another freezing cold month in Challis, Idaho, with average temperature varying between 28.6°F (-1.9°C) and 17.6°F (-8°C). In February, the average high-temperature is essentially the same as in January - a still freezing cold 28.6°F (-1.9°C). Weather in February »

The first month of the spring, March, is a wintry month in Challis, Idaho, with average temperature varying between 25.9°F (-3.4°C) and 35.2°F (1.8°C). In Challis, Idaho, 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 »

April, the same as March, is a wintry spring month in Challis, Idaho, with average temperature fluctuating between 32°F (0°C) and 42.4°F (5.8°C). In April, the average high-temperature marginally rises, from a cold 35.2°F (1.8°C) in March, to a still wintry 42.4°F (5.8°C). Weather in April »

The last month of the spring, May, is a cool 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 39.4°F (4.1°C). In Challis, the average high-temperature in May increases, from a wintry 42.4°F (5.8°C) in April, to a cool 54.5°F (12.5°C). Weather in May »

June, the first month of the summer, in Challis, is a comfortable month, with average temperature ranging between max 65.8°F (18.8°C) and min 46.2°F (7.9°C). In Challis, the average high-temperature in June increases, from a cool 54.5°F (12.5°C) in May, to an enjoyable 65.8°F (18.8°C). Weather in June »

July in Challis, Idaho, is a moderately hot summer month, with average temperature ranging between max 76.6°F (24.8°C) and min 51.8°F (11°C). The warmest month is July, with an average high-temperature of 76.6°F (24.8°C) and an average low-temperature of 51.8°F (11°C). Weather in July »

The last month of the summer, August, is also a moderately hot month in Challis, Idaho, with average temperature ranging between max 75.4°F (24.1°C) and min 50.2°F (10.1°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 »

September, the first month of the autumn, in Challis, is still a comfortable month, with average temperature ranging between min 41.4°F (5.2°C) and max 65.7°F (18.7°C). In Challis, the average high-temperature in September drops, from a moderately hot 75.4°F (24.1°C) in August, to an enjoyable 65.7°F (18.7°C). Weather in September »

October, like September, is a frosty autumn month in Challis, Idaho, with average temperature fluctuating between 32.7°F (0.4°C) and 49.6°F (9.8°C). In October, the average high-temperature plummets, from a comfortable 65.7°F (18.7°C) in September, to a chilly 49.6°F (9.8°C). Weather in October »

The last month of the autumn, November, is another cold month in Challis, Idaho, with average temperature varying between 36.7°F (2.6°C) and 22.8°F (-5.1°C). In Challis, Idaho, the average high-temperature in November drops, from a frosty 49.6°F (9.8°C) in October, to a cold 36.7°F (2.6°C). Weather in November »

December, the first month of the winter, in Challis, is also a subzero cold month, with average temperature varying between 26.1°F (-3.3°C) and 12.7°F (-10.7°C). December is the coldest month, with an average high-temperature of 26.1°F (-3.3°C) and an average low-temperature of 12.7°F (-10.7°C). Weather in December »

How many days does it rain in Challis?

Throughout the year, there are 75.7 rainfall days, and 6.38" (162mm) of precipitation is accumulated.

When does it snow in Challis?

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

How many days 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?

With an average of 5.8h of sunshine, January has the least sunshine of the year in Challis.

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

Months with the lowest UV index in Challis, Idaho, are January through April, October through December, with an average maximum UV index of 2.

What is the most humid month in Challis?

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

What is the snowiest month in Challis?

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

What is the wettest month in Challis?

June is the month with the most rainfall in Challis, Idaho. Rain falls for 10.2 days and accumulates 1.1" (28mm) of precipitation.

When are the longest days in Challis?

The month with the longest days in Challis is June, with an average of 15.5h of daylight.

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 in Challis, Idaho.

What is the warmest month in Challis?

July is the warmest month, with an average high-temperature of 76.6°F (24.8°C) and an average low-temperature of 51.8°F (11°C).

What is the least humid month in Challis?

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.

What month has the most sunshine in Challis?

July has the most sunshine of the year, with an average of 11.9h of sunshine.

What is the coldest month in Challis?

With an average high-temperature of 26.1°F (-3.3°C) and an average low-temperature of 12.7°F (-10.7°C), December is the coldest month in Challis, Idaho.

What is the month with the shortest days in Challis?

The month with the shortest days in Challis is December, with an average of 8.9h of daylight.
Average temperature - Challis, ID
Average humidity - Challis, ID
Average rainfall - 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 lowest number of rainy days is January (3.8 days).

Average snowfall - Challis, ID
Average snowfall days - Challis, ID

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

Average daylight / Average sunshine - Challis, ID
Average UV index - Challis, ID

Months with the highest UV index are June and July (UV index 5).
Months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).