The best times to visit Vermillion for ideal weather are

May 14th to October 7th

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

 

 


Other Vermillion Travel Info

Weather in Vermillion

Temperature

Average temperatures in Vermillion vary an incredible amount. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a low chance of precipitation most of the year. The area is somewhat temperate — in the 43rd 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 Vermillion, 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 88.3°F (31.3°C) with temperatures rarely dropping below 65.9°F (18.8°C) at night.

Vermillion Temperatures (Fahrenheit)

Key
High
Average
Low

Vermillion Temperatures (Celsius)

Key
High
Average
Low

“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.

Vermillion Perceived Temperature (F)

Key
High
Average
Low

Vermillion Perceived Temperature (C)

Key
High
Average
Low

 

Average Vermillion 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 30.6 19.9 11.3
Feb 33 21.1 12.8
Mar 50.1 37 27.6
Apr 61.5 48 37.4
May 73.2 60.1 49.6
Jun 81.6 70 60
Jul 86.6 75.1 64.5
Aug 83.6 72.2 62.3
Sep 77.6 64.2 53.2
Oct 63.6 50.8 41
Nov 48.5 36.8 27.6
Dec 31.8 22.5 14.8

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan -0.8 -6.7 -11.5
Feb 0.6 -6.1 -10.7
Mar 10.1 2.8 -2.4
Apr 16.4 8.9 3
May 22.9 15.6 9.8
Jun 27.6 21.1 15.6
Jul 30.3 23.9 18.1
Aug 28.7 22.3 16.8
Sep 25.3 17.9 11.8
Oct 17.6 10.4 5
Nov 9.2 2.7 -2.4
Dec -0.1 -5.3 -9.6

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Vermillion are January, December, and then February. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early to mid January. For example, on the week of January 8th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late May to early June with an average of 2 days of significant precipitation the week of May 28th.

When can you find snow in Vermillion? Weather stations report no annual snow. 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 Vermillion.

Key
Days with precipitation

Snow on the Ground

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

Key
Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 1% 0 0.1
Feb 4% 0 0.3
Mar 6% 0 0.5
Apr 12% 0 1.6
May 16% 0 1.8
Jun 23% 0 3.7
Jul 16% 0 3.1
Aug 13% 0 3.2
Sep 11% 0 2.2
Oct 11% 0 2.7
Nov 4% 0 0.3
Dec 3% 0 0.3

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 1 0 0.3
Feb 4 0 0.8
Mar 6 0 1.3
Apr 12 0 4.1
May 16 0 4.6
Jun 23 0 9.4
Jul 16 0 7.9
Aug 13 0 8.1
Sep 11 0 5.6
Oct 11 0 6.9
Nov 4 0 0.8
Dec 3 0 0.8

 

Humidity and Wind

Vermillion has some slightly muggy months, with moderately humid months on the other side of the year. The least humid month is April (49.6% relative humidity), and the most humid month is December (67%).

Wind in Vermillion is usually moderate. The windiest month is April, followed by March and May. April’s average wind speed of around 10.7 knots (12.3 MPH or 19.8 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early April where average top sustained speeds reach 20.8 knots, which is considered a fresh breeze.

Relative Humidity (%)

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

Key
Avg. Relative Humidity

Wind

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

Key
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 9.6 Gentle breeze 19.2 Strong breeze
Feb 9.5 Gentle breeze 18 Strong breeze
Mar 10 Gentle breeze 19.1 Strong breeze
Apr 10.7 Gentle breeze 20.2 Strong breeze
May 9.8 Gentle breeze 19.3 Strong breeze
Jun 8.3 Gentle breeze 17.1 Strong breeze
Jul 7.3 Gentle breeze 15.7 Strong breeze
Aug 7.1 Gentle breeze 15.2 Significant breeze
Sep 8.2 Gentle breeze 16.4 Strong breeze
Oct 9.1 Gentle breeze 17.5 Strong breeze
Nov 9.2 Gentle breeze 18 Strong breeze
Dec 9 Gentle breeze 17.3 Strong breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 62.1%
Feb 63.5%
Mar 58.3%
Apr 49.6%
May 51.7%
Jun 57.2%
Jul 59.3%
Aug 65.1%
Sep 57.9%
Oct 53.6%
Nov 54.5%
Dec 67%

 

Is it Safe to Travel to Vermillion?

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 Vermillion, SD, US is June, followed by May and February. 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 Vermillion in November. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month

 

Most Popular Months to Visit

Key
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 48.4 in November means 48.4% of the tourists vs. June.

 

 

Overall Vermillion Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 77.8°F (25.4°C) and 31.1°F (-0.5°C) with far warmer temperatures in the later months. Rain is rare with 2 to 5 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the most precipitation with 4 to 7 days of precipitation per month. June – August is the busiest season for tourism in Vermillion, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 79.4°F (26.3°C) and 40.2°F (4.6°C), which will feel chilly given the humidity and wind. It rains or snows a normal amount: 1 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 Vermillion to be enjoyable for warm weather travelers. The average high during this season is between 36.6°F (2.6°C) and 28.6°F (-1.9°C). On average, it rains or snows a very small amount: 0 to 1 times per month. These times of year are fairly slow with tourists.

 

Best Times to Travel› the United States › Vermillion, SD, US