Irmo, SC weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Irmo now
Loading the National Weather Service forecast…
Irmo weather by the hour
Irmo weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Irmo.
This week in Irmo
Sunrise, sunset and moon in Irmo
What is the weather usually like in Irmo?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 90°F average high
- Januarycoldest month · 29°F average low
- 45.5 inprecipitation per year · 1,156 mm
- 0.8 insnowfall per year · 2 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Irmo: April–May and September–October, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station CEDAR CREEK 2E, SC US (USC00381479), adjusted for the elevation of Irmo.
Irmo weather month by month
Sunrise and sunset in Irmo through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:28 AM | 5:39 PM | 10 h 11 min |
| February | 7:07 AM | 6:09 PM | 11 h 1 min |
| March | 7:33 AM | 7:33 PM | 12 h 0 min |
| April | 6:52 AM | 7:57 PM | 13 h 5 min |
| May | 6:21 AM | 8:20 PM | 13 h 59 min |
| June | 6:11 AM | 8:39 PM | 14 h 27 min |
| July | 6:23 AM | 8:38 PM | 14 h 15 min |
| August | 6:45 AM | 8:13 PM | 13 h 28 min |
| September | 7:06 AM | 7:32 PM | 12 h 25 min |
| October | 7:28 AM | 6:52 PM | 11 h 23 min |
| November | 6:56 AM | 5:22 PM | 10 h 26 min |
| December | 7:21 AM | 5:18 PM | 9 h 56 min |
Times for the 15th of each month, local time (America/New York).
What is the weather like in Irmo?
Irmo has a humid subtropical climate. The warmest month is July, with an average high of 90°F (32°C), and the coldest is January, with average lows of 29°F (-2°C).
It gets about 45.5 inches (1,156 mm) of precipitation a year. The wettest month is August and the driest is April.
The best time to visit Irmo is April–May and September–October. At 354 ft of elevation, nights are mild most of the year. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
More about Irmo
Weather in towns near Irmo
Questions about the weather in Irmo
What is the hottest month in Irmo?
July, with an average high of 90°F (32°C).
What is the coldest month in Irmo?
January, with an average low of 29°F (-2°C).
How much does it rain in Irmo?
About 45.5 inches (1,156 mm) a year; the wettest month is August.
Does it snow in Irmo?
Rarely: less than an inch in an average year.
When is the best time to visit Irmo?
April–May and September–October, when temperatures are most pleasant and rainy days are fewer.
What climate does Irmo have?
Humid subtropical (Köppen Cfa).
What is the weather like in Irmo in November?
Highs average 64°F and lows 36°F, with about 3.2 inches of precipitation.
What time is sunrise in Irmo?
Around 6:56 AM in mid-November, and sunset around 5:22 PM. Today’s exact times are shown above.
Where does this Irmo weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Irmo.
Last updated: