Irmo endures about 22 more days above 90 °F each year.
The year at a glance
Averages from 30 years of climate history, 1991-2020
| Irmo | Metric | Lake Murray of Richland |
|---|---|---|
| 212 days | Sunny daysclear or partly cloudy skies | 212 days |
| 43 in | Precipitationper year | 43 in |
| 118 days | Wet daysrain or snow per year | 118 days |
| 1 in | Snowfallper year | 1 in |
| 84 days | Hot daysabove 90 °F | 62 days |
| 61 days | Freezing nightsat or below 32 °F | 59 days |
| 72% | Humidityaverage relative | 72% |
| 63 °F | Average temperatureyear round | 63 °F |
Monthly temperatures
Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.
Daily highs
Daily lows
View monthly temperatures as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Irmo high | 56 | 60 | 68 | 77 | 83 | 89 | 92 | 91 | 86 | 76 | 66 | 58 |
| Lake Murray of Richland high | 55 | 59 | 66 | 75 | 82 | 88 | 91 | 89 | 84 | 75 | 65 | 57 |
| Irmo low | 33 | 36 | 41 | 49 | 59 | 67 | 71 | 70 | 63 | 51 | 40 | 35 |
| Lake Murray of Richland low | 33 | 36 | 42 | 50 | 59 | 67 | 70 | 69 | 63 | 51 | 41 | 36 |
Monthly precipitation
Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.
View monthly precipitation as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Irmo | 3.5 | 3.5 | 3.7 | 3.3 | 2.9 | 4.1 | 4.3 | 4.1 | 3.5 | 3.3 | 2.8 | 3.7 |
| Lake Murray of Richland | 3.5 | 3.5 | 3.7 | 3.3 | 2.9 | 4.1 | 4.3 | 4.1 | 3.5 | 3.3 | 2.8 | 3.7 |
Monthly sunny days
Days each month with clear or partly cloudy skies, so compare the same month between cities.
View monthly sunny days as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Irmo | 17 | 14 | 18 | 19 | 19 | 17 | 18 | 18 | 18 | 20 | 19 | 17 |
| Lake Murray of Richland | 17 | 14 | 18 | 19 | 19 | 17 | 18 | 18 | 18 | 20 | 19 | 17 |
Keep comparing
Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.
Irmo vs another city
- Irmo vs Seven Oaks, SC
- Irmo vs St. Andrews, SC
- Irmo vs Lexington, SC
- Irmo vs Oak Grove, SC
- Irmo vs West Columbia, SC
- Irmo vs New York, NY
- Irmo vs Los Angeles, CA
- Irmo vs Chicago, IL
- Irmo vs Houston, TX
- Irmo vs Phoenix, AZ
- Irmo vs Philadelphia, PA
Lake Murray of Richland vs another city
- Lake Murray of Richland vs Seven Oaks, SC
- Lake Murray of Richland vs Lexington, SC
- Lake Murray of Richland vs St. Andrews, SC
- Lake Murray of Richland vs Oak Grove, SC
- Lake Murray of Richland vs West Columbia, SC
- Lake Murray of Richland vs New York, NY
- Lake Murray of Richland vs Los Angeles, CA
- Lake Murray of Richland vs Chicago, IL
- Lake Murray of Richland vs Houston, TX
- Lake Murray of Richland vs Phoenix, AZ
- Lake Murray of Richland vs Philadelphia, PA
About this data
Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.
Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).