UTC Offset
UTC-04:00
Irmo, United States Snapshot 2026
Where is Irmo?
Irmo, United States
- Continent
- Americas
- Country
- United States
- City
- Irmo
- Population
- 12.1K
- Elevation
- 108 m
- Coordinates
- 34.09°, -81.18°
Irmo is a city in United States with a population of approximately 12.1K. Average temperatures range from 4°C (40°F) in January to 32°C (90°F) in July. The best time to visit is April, May, September, October. The city sits at an elevation of 108 m above sea level.
Time in Irmo right now
Open full time & time zone page 18:51 51
Monday, June 15, 2026
IANA time zone
America/New_York
Daylight saving
DST in effect
EST / EDT
Next DST change
November 1
backward -1h
Live weather in Irmo
Daylight in Irmo today
View full sunrise & sunset page Sunrise
Sunset
Day length
14h 25m
Climate normals for Irmo
Long-term monthly averages based on historical data.
January
Fair 
February
Fair March
Good April best
Excellent May best
Excellent June
Good July
Poor August
Poor September best
Excellent October best
Excellent November
Good December
Fair | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 13°C / 4°C | 10°C / 1°C | 10days (94 mm) Wet | 6.8h Fair | 72% Muggy | 3.5 Moderate | Fair | View Details |
| February | 16°C / 7°C | 15°C / 4°C | 9days (81 mm) Wet | 7h Good | 73% Muggy | 4.3 Moderate | Fair | View Details |
| March | 20°C / 9°C | 18°C / 7°C | 9days (90 mm) Wet | 8.3h Good | 67% Muggy | 5.8 High | Good | View Details |
| April best | 23°C / 13°C | 23°C / 11°C | 8days (96 mm) Wet | 10.2h Excellent | 66% Muggy | 7.1 Very High | Excellent | View Details |
| May best | 27°C / 18°C | 29°C / 18°C | 10days (105 mm) Wet | 10.3h Excellent | 69% Muggy | 7 High | Excellent | View Details |
| June | 30°C / 21°C | 34°C / 24°C | 12days (79 mm) Wet | 11.5h Excellent | 72% Muggy | 8 Very High | Good | View Details |
| July | 32°C / 24°C | 37°C / 28°C | 17days (133 mm) Wet | 11.7h Excellent | 75% Muggy | 8 Very High | Poor | View Details |
| August | 31°C / 23°C | 35°C / 26°C | 16days (146 mm) Wet | 10.5h Excellent | 78% Humid | 7.3 Very High | Poor | View Details |
| September best | 29°C / 20°C | 31°C / 22°C | 8days (83 mm) Wet | 9.9h Good | 73% Muggy | 6.6 High | Excellent | View Details |
| October best | 24°C / 15°C | 24°C / 15°C | 6days (70 mm) Good | 8.5h Good | 72% Muggy | 5.1 High | Excellent | View Details |
| November | 18°C / 9°C | 17°C / 7°C | 7days (69 mm) Good | 7.6h Good | 71% Muggy | 3.9 Moderate | Good | View Details |
| December | 14°C / 6°C | 12°C / 3°C | 10days (111 mm) Wet | 6.1h Fair | 76% Humid | 3.1 Moderate | Fair | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 13°C / 4°C . Feb: 16°C / 7°C . Mar: 20°C / 9°C . Apr: 23°C / 13°C . May: 27°C / 18°C . Jun: 30°C / 21°C . Jul: 32°C / 24°C . Aug: 31°C / 23°C . Sep: 29°C / 20°C . Oct: 24°C / 15°C . Nov: 18°C / 9°C . Dec: 14°C / 6°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 94 mm. Feb: 81 mm. Mar: 90 mm. Apr: 96 mm. May: 105 mm. Jun: 79 mm. Jul: 133 mm. Aug: 146 mm. Sep: 83 mm. Oct: 70 mm. Nov: 69 mm. Dec: 111 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 72%. Feb: 73%. Mar: 67%. Apr: 66%. May: 69%. Jun: 72%. Jul: 75%. Aug: 78%. Sep: 73%. Oct: 72%. Nov: 71%. Dec: 76%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 17 km/h . Feb: 17 km/h . Mar: 18 km/h . Apr: 18 km/h . May: 16 km/h . Jun: 14 km/h . Jul: 13 km/h . Aug: 13 km/h . Sep: 14 km/h . Oct: 14 km/h . Nov: 15 km/h . Dec: 16 km/h .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 4. Feb: UV 4. Mar: UV 6. Apr: UV 7. May: UV 7. Jun: UV 8. Jul: UV 8. Aug: UV 7. Sep: UV 7. Oct: UV 5. Nov: UV 4. Dec: UV 3.
Frequently Asked Questions
Irmo has a population of approximately 12.1K.
The best months to visit Irmo are April, May, September, October, when temperatures are pleasant and rainfall is lower.
Irmo receives approximately 1157mm of rainfall annually across 122 rainy days.
Irmo is located in United States, in the Americas region.
Irmo sits at an elevation of 108 m (354 ft) above sea level.