The best times to visit Irmo 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.
Irmo Travel Guide
Other Irmo Travel Info
Weather in Irmo
Average temperatures in Irmo 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 25th 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 Irmo, 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 95.4°F (35.2°C) with temperatures rarely dropping below 72.4°F (22.4°C) at night.
Irmo Temperatures (Fahrenheit)
Irmo 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.
Irmo Perceived Temperature (F)
Irmo Perceived Temperature (C)
Average Irmo 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 Irmo are November, October, and then September. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around late May. For example, on the week of May 21st 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 Irmo? Weather stations report moderate or seasonal snow likely to be deepest around February, especially close to early to mid February. The best time to ski (if at all) in Irmo is often around around February 12th 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 Irmo.
Snow on the Ground
The graph below shows the average snow on the ground in Irmo (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
Irmo has some slightly muggy months, with moderately humid months on the other side of the year. The least humid month is March (47.7% relative humidity), and the most humid month is August (61.7%).
Wind in Irmo is usually calm. The windiest month is April, followed by March and February. April’s average wind speed of around 6 knots (6.9 MPH or 11.1 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 14.1 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Irmo.
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||5.1||Light breeze||11.9||Significant breeze|
|Feb||5.6||Light breeze||12.9||Significant breeze|
|Mar||5.8||Light breeze||12.9||Significant breeze|
|Apr||6||Light breeze||13.3||Significant breeze|
|May||5.3||Light breeze||12.5||Significant breeze|
|Jun||4.8||Light breeze||12.7||Significant breeze|
|Jul||4.7||Light breeze||12.2||Significant breeze|
|Aug||4.1||Light breeze||10.9||Gentle breeze|
|Sep||4.2||Light breeze||9.9||Significant breeze|
|Oct||4.3||Light breeze||10.5||Gentle breeze|
|Nov||4.2||Light breeze||10||Significant breeze|
|Dec||4.4||Light breeze||10.9||Gentle breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Irmo?
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 Irmo, 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 Irmo 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 Irmo Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderate. Highs range from 90°F (32.2°C) and 64.7°F (18.2°C) with warmer temperatures in the later months. Rain is somewhat common with 5 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 the most precipitation with 7 to 8 days of precipitation per month. June – August is the second busiest season for tourism in Irmo, so lodging and other accommodations may cost slightly more.
Fall (September through November)
Fall daily highs range from 92°F (33.3°C) and 65.9°F (18.8°C), which will feel comfortable given the humidity and wind. It rains or snows a significant amount: 4 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 Irmo to be enjoyable for warm weather travelers. The average high during this season is between 66°F (18.9°C) and 58.3°F (14.6°C). On average, it rains or snows a fair amount: 6 to 7 times per month. These times of year are the busiest with tourists.