The best times to visit Saint Helena Island for ideal weather are

March 5th to May 27th

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

 

 


Other Saint Helena Island Travel Info

Weather in Saint Helena Island

Temperature

Average temperatures in Saint Helena Island 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 fair chance of precipitation about half of the year. The area is less temperate than some — in the 32nd 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 Saint Helena Island, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally early to mid August where highs are regularly around 93.4°F (34.1°C) with temperatures rarely dropping below 75.1°F (23.9°C) at night.

Saint Helena Island Temperatures (Fahrenheit)

Key
High
Average
Low

Saint Helena Island 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.

Saint Helena Island Perceived Temperature (F)

Key
High
Average
Low

Saint Helena Island Perceived Temperature (C)

Key
High
Average
Low

 

Average Saint Helena Island 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 60.8 49.1 39.5
Feb 63.6 51.3 41
Mar 70.6 58.4 48
Apr 78.2 66.6 56.2
May 84.7 73.9 64
Jun 91.1 80.5 71.6
Jul 92.2 81.9 73.9
Aug 91.3 81.7 74.2
Sep 86.5 77 69.2
Oct 78.9 67.8 58.3
Nov 69.6 57.4 47.4
Dec 65.8 54.1 44.4

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 16 9.5 4.2
Feb 17.6 10.7 5
Mar 21.4 14.7 8.9
Apr 25.7 19.2 13.4
May 29.3 23.3 17.8
Jun 32.8 26.9 22
Jul 33.4 27.7 23.3
Aug 32.9 27.6 23.4
Sep 30.3 25 20.7
Oct 26.1 19.9 14.6
Nov 20.9 14.1 8.6
Dec 18.8 12.3 6.9

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Saint Helena Island are November, October, and then May. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early November. For example, on the week of November 5th there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in mid to late August with an average of 2 days of significant precipitation the week of August 20th.

When can you find snow in Saint Helena Island? 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 Saint Helena Island.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Saint Helena Island (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 17% 0 2.4
Feb 22% 0 3.9
Mar 19% 0 3.9
Apr 18% 0 3.4
May 14% 0 2.4
Jun 23% 0 4.2
Jul 21% 0 4.6
Aug 28% 0 7.2
Sep 18% 0 3.7
Oct 13% 0 2.7
Nov 10% 0 2
Dec 20% 0 3.2

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 17 0 6.1
Feb 22 0 9.9
Mar 19 0 9.9
Apr 18 0 8.6
May 14 0 6.1
Jun 23 0 10.7
Jul 21 0 11.7
Aug 28 0 18.3
Sep 18 0 9.4
Oct 13 0 6.9
Nov 10 0 5.1
Dec 20 0 8.1

 

Humidity and Wind

Saint Helena Island has some high humidity months, with other comfortably humid months. The least humid month is February (57.1% relative humidity), and the most humid month is August (69.9%).

Wind in Saint Helena Island is usually calm. The windiest month is March, followed by April and February. March’s average wind speed of around 6.4 knots (7.3 MPH or 11.8 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 late February and early March where average top sustained speeds reach 13.8 knots, which is considered a moderate breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Saint Helena Island.

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 5.7 Light breeze 11.6 Significant breeze
Feb 6 Light breeze 12.4 Significant breeze
Mar 6.4 Light breeze 13.1 Significant breeze
Apr 6.1 Light breeze 12.5 Significant breeze
May 5.6 Light breeze 11.4 Significant breeze
Jun 4.9 Light breeze 11.3 Significant breeze
Jul 4.8 Light breeze 11.5 Significant breeze
Aug 4.4 Light breeze 10.6 Gentle breeze
Sep 4.8 Light breeze 10 Significant breeze
Oct 4.9 Light breeze 10.2 Gentle breeze
Nov 5.3 Light breeze 10.4 Significant breeze
Dec 5.2 Light breeze 10.8 Gentle breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 57.7%
Feb 57.1%
Mar 58.1%
Apr 59.1%
May 61.3%
Jun 64.5%
Jul 67.1%
Aug 69.9%
Sep 68.8%
Oct 64.6%
Nov 62.5%
Dec 65.9%

 

Is it Safe to Travel to Saint Helena Island?

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 Saint Helena Island, SC, US is July, followed by March and June. 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 Saint Helena Island 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 45.5 in November means 45.5% of the tourists vs. July.

 

 

Overall Saint Helena Island Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel warm. Highs range from 87.9°F (31.1°C) and 64.4°F (18°C) with warmer temperatures in the later months. Rain is somewhat common with 4 to 6 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 quite warm. These months see the most precipitation with 7 to 9 days of precipitation per month. June – August is the busiest season for tourism in Saint Helena Island, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 89.2°F (31.8°C) and 66.6°F (19.2°C), which will feel very nice given the humidity and wind. It rains or snows a significant amount: 3 to 5 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 Saint Helena Island to be enjoyable for warm weather travelers. The average high during this season is between 66.3°F (19.1°C) and 60°F (15.6°C). On average, it rains or snows a fair amount: 5 to 6 times per month. These times of year are fairly slow with tourists.

 

Best Times to Travelthe United States › Saint Helena Island, SC, US