October Weather in Casper, United States

Last updated: June 24, 2025

In Casper, United States, the average temperature in October hovers around 5°C (41°F). Expect a range that can dip as low as -29°C (-20°F) and climb to a balmy 26°C (78°F). Keep in mind that this month typically sees 43 mm (1.7 in) of precipitation spread over about 8 days, combined with an average humidity of 70%. Stay prepared for a variety of weather conditions!

October Temperature in Casper

In October in Casper, the average temperature is 5°C (41°F). Maximum temperatures can reach 26°C (78°F) and minimums can drop as low as -29°C (-20°F). Be prepared for a wide range of temperatures when traveling to Casper during this month.

October Weather in Casper: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Casper, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Casper, October typically has an average temperature of 5°C (41°F), with highs reaching up to 26°C (78°F) and lows dropping to around -29°C (-20°F).

Data source: Temperature data for Casper generated using information from the Copernicus Climate Change Service.

October Precipitation in Casper

In Casper in October, the total precipitation amount is 43 mm (1.7 in) over the course of 8 days.

October Precipitation Trends in Casper

The chart displays monthly precipitation patterns in Casper, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Casper, October typically receives around 43 mm (1.7 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

October Humidity in Casper

In Casper in October, humidity is 70%. With an average temperature of 5°C (41°F), this humidity feels like a damp chill that penetrates your clothes, making outdoor activities less enjoyable and requiring warm layers to stay comfortable while traveling.

October Average Humidity in Casper

This chart illustrates the average monthly humidity levels in Casper, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Casper is approximately 70%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Casper

In Casper in October, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Casper, you can refer to this Hourly UV Index in Casper.

Maximum UV Index Levels in Casper for October

The chart shows the monthly maximum UV Index (UVI) for Casper in October, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In October, the maximum UV index in Casper typically reaches 6, which falls under the high exposure category.

Data source: Casper October UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How October Weather in Casper Compares to Other Months

Weather in Casper varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in Casper, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Casper, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (21°F)	23 mm (0.9 inches)	79%	moderate
February Weather	-7°C (19°F)	31 mm (1.2 inches)	81%	high
March Weather	-1°C (31°F)	48 mm (1.9 inches)	70%	high
April Weather	3°C (38°F)	59 mm (2.3 inches)	67%	extreme
May Weather	10°C (50°F)	70 mm (2.7 inches)	70%	very high
June Weather	18°C (65°F)	30 mm (1.2 inches)	75%	extreme
July Weather	22°C (72°F)	17 mm (0.7 inches)	76%	extreme
August Weather	21°C (69°F)	19 mm (0.7 inches)	76%	extreme
September Weather	16°C (60°F)	29 mm (1.2 inches)	72%	very high
October Weather	5°C (41°F)	43 mm (1.7 inches)	70%	high
November Weather	1°C (34°F)	26 mm (1.0 inches)	76%	moderate
December Weather	-5°C (24°F)	27 mm (1.1 inches)	81%	moderate