The best times to visit Sumter for ideal weather are
March 12th to May 27th
September 17th to November 4th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Sumter Travel Guide
Other Sumter Travel Info
Weather in Sumter
Average temperatures in Sumter vary greatly. Considering humidity, temperatures feel very nice much of the year, but hot in the summer and cold in the winter with a very low chance of rain or snow throughout the year. The area is somewhat temperate — in the 50th 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 Sumter, 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 92.8°F (33.8°C) with temperatures rarely dropping below 73.1°F (22.8°C) at night.
Sumter Temperatures (Fahrenheit)
Sumter Temperatures (Celsius)
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.
Sumter Perceived Temperature (F)
Sumter Perceived Temperature (C)
Average Sumter 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.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Sumter are January, February, and then March. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early January. For example, on the week of January 1st there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early September with an average of 0 days of significant precipitation the week of September 3rd.
When can you find snow in Sumter? 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 Sumter.
Snow on the Ground
The graph below shows the average snow on the ground in Sumter (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
Sumter has some very humid months, with other comfortably humid months. The least humid month is February (59% relative humidity), and the most humid month is August (76.1%).
Wind in Sumter is usually extremely calm. The windiest month is March, followed by April and February. March’s average wind speed of around 4.8 knots (5.5 MPH or 8.9 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 12.9 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Sumter.
The graph below shows wind speed (max and average) in knots.
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||4.1||Light breeze||11||Significant breeze|
|Feb||4.4||Light breeze||11.7||Significant breeze|
|Mar||4.8||Light breeze||12.1||Significant breeze|
|Apr||4.6||Light breeze||12||Significant breeze|
|May||4.1||Light breeze||11.1||Significant breeze|
|Jun||3.5||Barely noticeable||10.7||Gentle breeze|
|Jul||3.5||Barely noticeable||10.5||Significant breeze|
|Aug||2.9||Barely noticeable||9.6||Gentle breeze|
|Sep||3.1||Barely noticeable||9.6||Significant breeze|
|Oct||3.5||Barely noticeable||10||Gentle breeze|
|Nov||3.4||Barely noticeable||9.8||Significant breeze|
|Dec||3.6||Barely noticeable||10.2||Gentle breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Sumter?
Our best data indicates this area is generally safe. As of Oct 07, 2019 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 Sep 23, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in Sumter, SC, US is February, followed by June 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 Sumter 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
Overall Sumter Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderate. Highs range from 88.5°F (31.4°C) and 60.8°F (16°C) with warmer temperatures in the later months. Rain is nonexistent with roughly 0 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 the least precipitation with about 0 days of precipitation per month. June – August is the second busiest season for tourism in Sumter, so lodging and other accommodations may cost slightly more.
Fall (September through November)
Fall daily highs range from 90.2°F (32.3°C) and 64.8°F (18.2°C), which will feel comfortable given the humidity and wind. It rains or snows a trivial amount: approximately 0 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 too cold this time of year in Sumter to be enjoyable for warm weather travelers. The average high during this season is between 61.6°F (16.4°C) and 53.9°F (12.2°C). On average, it rains or snows a insignificant amount: consistently 0 times per month. These times of year are the busiest with tourists.