October weather forecast
Casper, WY

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The calm North Platte River flowing through downtown Casper in Wyoming
The calm North Platte River flowing through downtown Casper in Wyoming

Weather in October

October ushers in the distinct autumn season in Casper, Wyoming. The clear divide from the hot summer to cooler temperatures becomes more evident, with average highs descending to 54.3°F (12.4°C). The light snowfall, seen in Casper during this month signifies the near approach of winter. Captivating hues of fall foliage catering to beautiful landscapes attract many visitors during this month. The warm days coupled with cool nights and the aesthetics of fall make the month of October thoroughly enjoyable.

Temperature

In Casper, the onset of October is marked by a decreased average high-temperature, declining from September's pleasant 72.7°F (22.6°C) to a fresh 54.3°F (12.4°C). October brings with it a nighttime average temperature of 36.5°F (2.5°C) in Casper.

Humidity

The average relative humidity in October is 55%.

Rainfall

In Casper, during October, the rain falls for 7.2 days and regularly aggregates up to 0.98" (25mm) of precipitation. In Casper, during the entire year, the rain falls for 91.6 days and collects up to 9.69" (246mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall in Casper. In Casper, during October, snow falls for 5.3 days and regularly aggregates up to 3.58" (91mm) of snow. In Casper, during the entire year, snow falls for 61.5 days and aggregates up to 32.13" (816mm) of snow.

Daylight

The average length of the day in October is 11h and 2min.
On the first day of the month, sunrise is at 7:03 am and sunset at 6:45 pm. On the last day of October, sunrise is at 7:39 am and sunset at 5:58 pm MDT.

Sunshine

In Casper, the average sunshine in October is 7h.

UV index

The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for average individuals.
Note: In October, the maximum UV index of 2 suggests these recommendations:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.

Frequently asked questions

What is the usual temperature for Casper in October?

In Casper, 54.3°F (12.4°C) is the average high-temperature and 36.5°F (2.5°C) is the average low-temperature during October.

What is the average humidity in October in Casper?

The average relative humidity in October in Casper is 55%.

How much does it rain in Casper in October?

In October, in Casper, the rain falls for 7.2 days. Throughout October, 0.98" (25mm) of precipitation is accumulated.

How much does it snow in Casper in October?

In October, in Casper, it is snowing for 5.3 days. Throughout October, 3.58" (91mm) of snow is accumulated.

How many hours of daylight does Casper have in October?

The average day length in October is 11h and 2min.

What time are sunrise and sunset in October in Casper?

On the first day of October in Casper, sunrise is at 7:03 am and sunset at 6:45 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 5:58 pm MDT.

How many hours of sunshine does Casper have in October?

In October, the average sunshine duration in Casper is 7h.

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

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

How high is the UV index in October in Casper?

In Casper, Wyoming, the average daily maximum UV index in October is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from exposure to Sun's UV rays.
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
Casper, WY

Average temperature in October - Casper, WY
  • Average high temperature in October: 54.3°F

The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is December (28.4°F).

  • Average low temperature in October: 36.5°F

The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is December (15.1°F).

Average pressure in October
Casper, WY

Average pressure in October - Casper, WY
  • Average pressure in October: 30"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

Average wind speed in October
Casper, WY

Average wind speed in October - Casper, WY
  • Average wind speed in October: 10.7mph

The windiest month (with the highest average wind speed) is January (12.1mph).
The calmest months (with the lowest average wind speed) are July and August (8.5mph).

Average humidity in October
Casper, WY

Average humidity in October - Casper, WY
  • Average humidity in October: 55%

The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (37%).

Average rainfall in October
Casper, WY

Average rainfall in October - Casper, WY
  • Average rainfall in October: 0.98"

The wettest month (with the highest rainfall) is May (1.77").
The driest months (with the least rainfall) are January, August and September (0.43").

Average rainfall days in October
Casper, WY

Average rainfall days in October - Casper, WY
  • Average rainfall days in October: 7.2 days

The month with the highest number of rainy days is May (14.1 days).
The month with the least rainy days is January (3.6 days).

Average snowfall in October
Casper, WY

Average snowfall in October - Casper, WY
  • Average snowfall in October: 3.58"

The month with the highest snowfall is November (5.47").
The months with the least snowfall are June, July and August (0").

Average snowfall days in October
Casper, WY

Average snowfall days in October - Casper, WY
  • Average snowfall days in October: 5.3 days

The month with the highest number of snowfall days is February (11.2 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight in October /
Average sunshine in October
Casper, WY

Average daylight in October / Average sunshine in October - Casper, WY
  • Average daylight in October: 11h and 0min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in October: 7h and 0min

The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 6min).

Average sunshine days in October
Casper, WY

Average sunshine days in October - Casper, WY
  • Average sunshine days in October: 18.5 days

The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is May (11.9 days).

Average UV index in October
Casper, WY

Average UV index in October - Casper, WY
  • Average UV index in October: 2

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

Average cloud cover in October
Casper, WY

Average cloud cover in October - Casper, WY
  • Average cloud cover in October: 23

The month with the most cloud cover is February (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 13).

Average visibility in October
Casper, WY

Average visibility in October - Casper, WY
  • Average visibility in October: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Casper, Wyoming, USA

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