October weather forecast
Challis, ID

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Weather in October

October ensures the full arrival of fall in Challis with a further decrease in temperature and the dominance of rainfall over snowfall. The coolness sets across the city as temperatures plummet, providing relief from the scorching summer heat. Despite the cooling climate, the average high manages to maintain a modest 49.6°F (9.8°C). Leaves turn vivid hues of red, orange, and gold, painting the city in beautiful autumn colors. The blend of cool breezes and splendid fall foliage makes October an eye-candy for visitors and residents alike.

Temperature

As Challis welcomes October, there is a noticeable shift in the average high-temperature, dropping from September's refreshing 65.7°F (18.7°C) to a frosty 49.6°F (9.8°C). The average low-temperature of 30.2°F (-1°C) is witnessed during October.

Humidity

In Challis, the average relative humidity in October is 60%.

Rainfall

In Challis, during October, the rain falls for 6.5 days and regularly aggregates up to 0.55" (14mm) of precipitation. Throughout the year, there are 75.7 rainfall days, and 6.38" (162mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Challis are January through June, September through December. In Challis, in October, during 2.5 snowfall days, 1.3" (33mm) of snow is typically accumulated. In Challis, during the entire year, snow falls for 51.7 days and aggregates up to 18.62" (473mm) of snow.

Daylight

The average length of the day in October in Challis, Idaho, is 10h and 58min.
On the first day of October in Challis, sunrise is at 7:35 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 8:14 am and sunset at 6:26 pm MDT.

Sunshine

In Challis, Idaho, the average sunshine in October is 7.8h.

UV index

January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Challis, Idaho. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: An average maximum UV index of 2 in October leads to these recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
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Frequently asked questions

What is the temperature in October in Challis?

The high-temperature during October is 49.6°F (9.8°C) and the low-temperature is 30.2°F (-1°C).

What is the average humidity in October in Challis?

In October, the average relative humidity in Challis, Idaho, is 60%.

How many days does it rain in October in Challis?

In Challis, Idaho, in October, it is raining for 6.5 days, with typically 0.55" (14mm) of accumulated precipitation.

How many days does it snow in October in Challis?

In Challis, in October, snow falls for 2.5 days, with typically accumulated 1.3" (33mm) of snow.

What is the average length of the day in October in Challis?

In Challis, the average day length in October is 10h and 58min.

When are sunrise and sunset in October in Challis?

In October, on the first day of the month, sunrise is at 7:35 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 8:14 am and sunset at 6:26 pm MDT.

How many hours of sunshine does Challis have in October?

In Challis, Idaho, the average sunshine duration in October is 7.8h.

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

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

What is the UV index intensity in October in Challis?

In Challis, Idaho, the average daily maximum UV index in October is 2. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Challis, ID

Average temperature in October - Challis, ID
  • Average high temperature in October: 49.6°F

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).

  • Average low temperature in October: 30.2°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 in October
Challis, ID

Average pressure in October - Challis, ID
  • Average pressure in October: 30.06"Hg

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 in October
Challis, ID

Average wind speed in October - Challis, ID
  • Average wind speed in October: 5.1mph

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 in October
Challis, ID

Average humidity in October - Challis, ID
  • Average humidity in October: 60%

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 in October
Challis, ID

Average rainfall in October - Challis, ID
  • Average rainfall in October: 0.55"

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 in October
Challis, ID

Average rainfall days in October - Challis, ID
  • Average rainfall days in October: 6.5 days

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 in October
Challis, ID

Average snowfall in October - Challis, ID
  • Average snowfall in October: 1.3"

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 in October
Challis, ID

Average snowfall days in October - Challis, ID
  • Average snowfall days in October: 2.5 days

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 in October /
Average sunshine in October
Challis, ID

Average daylight in October / Average sunshine in October - Challis, ID
  • Average daylight in October: 11h and 0min

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).

  • Average sunshine in October: 7h and 5min

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 in October
Challis, ID

Average sunshine days in October - Challis, ID
  • Average sunshine days in October: 22.1 days

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 in October
Challis, ID

Average UV index in October - Challis, ID
  • Average UV index in October: 2

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 cloud cover in October
Challis, ID

Average cloud cover in October - Challis, ID
  • Average cloud cover in October: 24

The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 11).

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Average visibility in October
Challis, ID

Average visibility in October - Challis, ID
  • Average visibility in October: 6mi

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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Challis, Idaho, USA

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