The best times to visit Duncan for ideal weather are

April 2nd to June 3rd

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

 

 


Other Duncan Travel Info

Weather in Duncan

Temperature

Average temperatures in Duncan vary greatly. Considering humidity, temperatures feel nice some of the year, but often too hot in the summer and cold in the winter with a chance of rain or snow throughout most of the year. The area is less temperate than some — in the 19th 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 Duncan, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally late July where highs are regularly around 93.1°F (33.9°C) with temperatures rarely dropping below 69.8°F (21°C) at night.

Duncan Temperatures (Fahrenheit)

Key
High
Average
Low

Duncan 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.

Duncan Perceived Temperature (F)

Key
High
Average
Low

Duncan Perceived Temperature (C)

Key
High
Average
Low

 

Average Duncan 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 54.8 41.6 30.3
Feb 58.6 44.2 31.7
Mar 67.6 53.1 40.3
Apr 76.2 61.7 48.1
May 82.6 69.4 57.3
Jun 90.6 77.3 66.3
Jul 91.5 78.7 68.7
Aug 90.6 77.9 68.4
Sep 84.5 72.1 62.6
Oct 75.1 61.2 49.4
Nov 64.9 51 38.5
Dec 58.5 46.5 35.7

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 12.7 5.3 -0.9
Feb 14.8 6.8 -0.2
Mar 19.8 11.7 4.6
Apr 24.6 16.5 8.9
May 28.1 20.8 14.1
Jun 32.6 25.2 19.1
Jul 33.1 25.9 20.4
Aug 32.6 25.5 20.2
Sep 29.2 22.3 17
Oct 23.9 16.2 9.7
Nov 18.3 10.6 3.6
Dec 14.7 8.1 2.1

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Duncan are September, October, and then November. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early September. For example, on the week of September 3rd there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in late December with an average of 3 days of significant precipitation the week of December 24th.

When can you find snow in Duncan? Weather stations report a good amount of seasonal snow likely to be deepest around January, especially close to early to mid January. The best time to ski (if at all) in Duncan is often around around January 8th 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 Duncan.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Duncan (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 22% 2.7 4.1
Feb 24% 1.7 3.2
Mar 23% 2.6 4.3
Apr 24% 0 4.1
May 19% 0 3.8
Jun 21% 0 3.2
Jul 24% 0 4.8
Aug 22% 0 4.8
Sep 16% 0 3.9
Oct 16% 0 3.4
Nov 18% 0 3.7
Dec 27% 1.6 6

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 22 6.9 10.4
Feb 24 4.3 8.1
Mar 23 6.6 10.9
Apr 24 0 10.4
May 19 0 9.7
Jun 21 0 8.1
Jul 24 0 12.2
Aug 22 0 12.2
Sep 16 0 9.9
Oct 16 0 8.6
Nov 18 0 9.4
Dec 27 4.1 15.2

 

Humidity and Wind

Duncan has some slightly muggy months, with moderately humid months on the other side of the year. The least humid month is February (45.5% relative humidity), and the most humid month is September (63%).

Wind in Duncan is usually calm. The windiest month is April, followed by March and February. April’s average wind speed of around 6.2 knots (7.1 MPH or 11.4 KPH) is considered “a light 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 13.5 knots, which is considered a moderate breeze.

Relative Humidity (%)

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

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 5.5 Light breeze 11.7 Significant breeze
Feb 5.8 Light breeze 12.4 Significant breeze
Mar 6.1 Light breeze 12.6 Significant breeze
Apr 6.2 Light breeze 12.7 Significant breeze
May 5.2 Light breeze 11.7 Significant breeze
Jun 4.7 Light breeze 11.6 Significant breeze
Jul 4.5 Light breeze 11.4 Significant breeze
Aug 4 Light breeze 10 Gentle breeze
Sep 4.5 Light breeze 9.7 Significant breeze
Oct 4.8 Light breeze 10.3 Gentle breeze
Nov 4.8 Light breeze 10.7 Significant breeze
Dec 4.9 Light breeze 10.9 Gentle breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 49.6%
Feb 45.5%
Mar 46.6%
Apr 48.3%
May 56.8%
Jun 57.5%
Jul 60.5%
Aug 62.6%
Sep 63%
Oct 59.6%
Nov 52.4%
Dec 58.7%

 

Is it Safe to Travel to Duncan?

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 Duncan, SC, US is October, followed by February and July. 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 Duncan 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 somewhat extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 49.1 in November means 49.1% of the tourists vs. October.

 

 

Overall Duncan Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderate. Highs range from 87.2°F (30.7°C) and 60.4°F (15.8°C) with warmer temperatures in the later months. Rain is somewhat common with 6 to 7 days of significant precipitation per month. Spring is the slowest 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 6 to 8 days of precipitation per month. June – August is fairly slow season for tourism in Duncan, so lodging and other accommodations may cost slightly less.

Fall (September through November)

Fall daily highs range from 88.6°F (31.4°C) and 60.8°F (16°C), which will feel comfortable given the humidity and wind. It rains or snows a significant amount: approximately 5 days per month. Tourism is the busiest during these months due to the weather, so hotels may be higher priced.

Winter (December through February)

Weather is too cold this time of year in Duncan to be enjoyable for warm weather travelers. The average high during this season is between 61.4°F (16.3°C) and 54°F (12.2°C). On average, it rains or snows a fair amount: 7 to 8 times per month. These times of year are the second busiest with tourists.

 

Best Times to Travel› the United States › Duncan, SC, US