The best times to visit Casper for ideal weather are

June 11th to September 30th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.



Other Casper Travel Info

Weather in Casper


Average temperatures in Casper vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a very low chance of rain or snow throughout the year. The area is less temperate than some — in the 38th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Casper, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 92.8°F (33.8°C) with temperatures rarely dropping below 52.4°F (11.3°C) at night.

Casper Temperatures (Fahrenheit)


Casper Temperatures (Celsius)


“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Casper Perceived Temperature (F)


Casper Perceived Temperature (C)



Average Casper Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 36.5 25.2 14.1
Feb 40 26.2 14.6
Mar 53.5 37 23.3
Apr 59.4 41.9 26.8
May 68.7 51.3 35.6
Jun 82.5 63.1 44.2
Jul 91.2 71.7 52.1
Aug 89.2 69.6 50.7
Sep 80.6 60.2 41.9
Oct 63.5 46 31.5
Nov 50.4 35.2 21.8
Dec 35.6 24.1 12.7

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 2.5 -3.8 -9.9
Feb 4.4 -3.2 -9.7
Mar 11.9 2.8 -4.8
Apr 15.2 5.5 -2.9
May 20.4 10.7 2
Jun 28.1 17.3 6.8
Jul 32.9 22.1 11.2
Aug 31.8 20.9 10.4
Sep 27 15.7 5.5
Oct 17.5 7.8 -0.3
Nov 10.2 1.8 -5.7
Dec 2 -4.4 -10.7



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Casper are November, February, and then August. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid January. For example, on the week of January 15th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late May with an average of 2 days of significant precipitation the week of May 21st.

When can you find snow in Casper? Weather stations report large amounts of snow likely to be deepest around April, especially close to early October. The best time to ski (if at all) in Casper is often around around December 17th when fresh powder is deepest. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Casper.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Casper (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 8% 3 0.6
Feb 6% 2.1 0.6
Mar 11% 2.7 1
Apr 13% 3.1 1.3
May 20% 2.2 2.5
Jun 16% 0 1.3
Jul 12% 0 1.7
Aug 7% 0 0.9
Sep 7% 1.2 0.7
Oct 10% 2.9 1.4
Nov 6% 2.1 0.5
Dec 9% 2.9 0.8

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 8 7.6 1.5
Feb 6 5.3 1.5
Mar 11 6.9 2.5
Apr 13 7.9 3.3
May 20 5.6 6.4
Jun 16 0 3.3
Jul 12 0 4.3
Aug 7 0 2.3
Sep 7 3 1.8
Oct 10 7.4 3.6
Nov 6 5.3 1.3
Dec 9 7.4 2


Humidity and Wind

Casper has some comfortably humid months, and dry months in the opposite season. The least humid month is August (28.3% relative humidity), and the most humid month is February (51.5%).

Wind in Casper is usually moderate. The windiest month is January, followed by December and November. January’s average wind speed of around 13.5 knots (15.6 MPH or 25.1 KPH) is considered “a moderate breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late March where average top sustained speeds reach 23.5 knots, which is considered a strong breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Casper.

Avg. Relative Humidity


The graph below shows wind speed (max and average) in knots.

Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 13.5 Significant breeze 22.6 Very strong breeze
Feb 11.2 Significant breeze 20.3 Strong breeze
Mar 11.3 Significant breeze 21.7 Very strong breeze
Apr 10 Gentle breeze 20.4 Strong breeze
May 9 Gentle breeze 19 Very strong breeze
Jun 8.3 Gentle breeze 19.2 Strong breeze
Jul 7.6 Gentle breeze 18.1 Very strong breeze
Aug 7.7 Gentle breeze 17.8 Strong breeze
Sep 8.3 Gentle breeze 17.8 Very strong breeze
Oct 9.3 Gentle breeze 18.4 Strong breeze
Nov 11.5 Significant breeze 20.7 Very strong breeze
Dec 12.6 Significant breeze 21.6 Strong breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 49.2%
Feb 51.5%
Mar 41.2%
Apr 42.9%
May 44.5%
Jun 36.3%
Jul 29.9%
Aug 28.3%
Sep 30.3%
Oct 43.5%
Nov 40.5%
Dec 51.4%


Is it Safe to Travel to Casper?

Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Dec 04, 2023.


The Busiest and Least Crowded Months

The busiest month for tourism in Casper, WY, US is August, followed by September and May. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Casper in October. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 51.9 in October means 51.9% of the tourists vs. August.



Overall Casper Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 75.3°F (24.1°C) and 42.5°F (5.8°C) with warmer temperatures in the later months. Rain is somewhat common with 3 to 6 days of significant precipitation per month. Spring is fairly slow for tourism, which makes it a good time for those looking for deals.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are quite warm. These months see moderate precipitation with 2 to 5 days of precipitation per month. June – August is the busiest season for tourism in Casper, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 83.4°F (28.6°C) and 43.3°F (6.3°C), which will feel chilly given the humidity and wind. It rains or snows a normal amount: 2 to 3 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is far too cold this time of year in Casper to be enjoyable for warm weather travelers. The average high during this season is between 42.5°F (5.8°C) and 30.9°F (-0.6°C). On average, it rains or snows a smalll amount: 2 to 3 times per month. These times of year are the second busiest with tourists.


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