Irmo, SC, September 26, 2025
News Summary
On September 25, 2025, Irmo, SC experienced a mix of high temperatures and thunderstorms, with the day peaking at 84°F and witnessing 3.48 inches of rainfall. The weather brought a significant heat index and a hazardous UV index, urging residents to take precautions while enjoying the brief periods of sunshine. A total of 12 hours of daylight allowed for evening outdoor activities amidst the unpredictable weather.
Irmo, SC, Braces for Thunderstorms and High Temperatures on September 25, 2025
On September 25, 2025, the charming town of Irmo, SC, experienced quite a mix of weather conditions that kept residents on their toes. As early as the sun rose at 6:58 AM, the day was already gearing up to deliver a cocktail of heat and storms. Let’s dive into how this unusual weather unfolded throughout the day.
Temperature Peaks
The day started off with a high temperature that peaked at a balmy 84°F (29°C), later dropping down to a comfortable 65°F (18°C) by nightfall. This brings the average temperature of the day down to a neat 74°F (23°C). Not too shabby for a late September day!
Rain, Rain, Go Away
All that warmth was accompanied by a hefty dose of rainfall. Irmo saw a significant 3.48 inches (88.4 mm) of precipitation, thanks to thunderstorms that rolled through both in the morning and afternoon. Those thunderstorms were not just loud; they came with strong gusty winds that may have caught a few folks by surprise.
Humidity and Heat Index
Humidity levels also danced around at a steady average of 72%, which contributed to a higher heat index of 93.2°F (34°C). This indicates a high risk of heat-related illnesses, which is something to be mindful of, especially for outdoor lovers and those with vulnerable health.
UV Exposure Alert
If you were planning to soak up the sunshine, the UV index peaked at a hazardous 6. That’s a big red flag for anyone thinking about spending extended time outdoors without proper precautions. Remember your hats and sunscreen!
A Sunny Break
In a glimmer of hope amid the gloomy forecasts, Irmo enjoyed approximately 8.6 hours of sunshine during the day. With clear skies after the rain, many residents took the opportunity to step outside and bask in the golden rays while they could.
Wind and Air Quality
The wind speed remained calm, sustained at about 5 to 10 mph. Meanwhile, residents could breathe easy as the air quality index measured 43, which is categorized as good. With a pollution index of 13,023,700, the air had low pollution levels, making it a suitable day for outdoor activities – after the storms, of course!
Daylight Hours
As the sun set at 7:50 PM, the average daylight stretched out to 12 hours and 22 minutes. That means plenty of time to enjoy the outdoors, whether it was a post-storm stroll or a relaxing evening in as the skies cleared.
In Summary
Irmo’s day on September 25th was a classic example of the unpredictable nature of late-summer weather, balancing thunderstorms with an inviting warmth. As residents prepare for what’s next in their weather journey, they should always stay informed and ready!
Frequently Asked Questions (FAQ)
What was the highest temperature recorded in Irmo, SC, on September 25, 2025?
84°F (29°C).
How much rain fell in Irmo, SC, on that day?
3.48 inches (88.4 mm) of precipitation recorded.
What was the humidity level in Irmo, SC, on September 25, 2025?
Average relative humidity was 72%.
What was the UV index on that day?
UV Index reached a high of 6, indicating a high risk of harm from unprotected sun exposure.
How long was the average daylight in Irmo, SC, on September 25, 2025?
Average length of the day was 12 hours and 22 minutes.
Key Features Overview
| Feature | Measurement |
|---|---|
| High Temperature | 84°F (29°C) |
| Low Temperature | 65°F (18°C) |
| Average Temperature | 74°F (23°C) |
| Total Rainfall | 3.48 inches (88.4 mm) |
| Humidity | 72% |
| Heat Index | 93.2°F (34°C) |
| UV Index | 6 |
| Sunshine Hours | 8.6 hours |
| Air Quality Index | 43 (Good) |
Residents of Irmo, SC, can look back on September 25, 2025, as a day filled with both excitement and caution, taking in all the unpredictable beauty that mother nature has to offer!
Author: STAFF HERE IRMO
The IRMO STAFF WRITER represents the experienced team at HEREIrmo.com, your go-to source for actionable local news and information in Irmo, Lexington and Richland Counties, and beyond. Specializing in "news you can use," we cover essential topics like product reviews for personal and business needs, local business directories, politics, real estate trends, neighborhood insights, and state news affecting the area—with deep expertise drawn from years of dedicated reporting and strong community input, including local press releases and business updates. We deliver top reporting on high-value events such as the Irmo Okra Strut Festival, Harbison Community Events, and local sports tournaments at the Palmetto Health Credit Union Foundation Stadium. Our coverage extends to key organizations like the Irmo Chapin Recreation Commission and the Lexington Chamber and Visitors Center, plus leading businesses in retail and healthcare that power the local economy such as Village at Sandhill and Lexington Medical Center. As part of the broader HERE network, including HEREAiken.com, HEREBeaufort.com, HEREChapin.com, HERECharleston.com, HEREClinton.com, HEREColumbia.com, HEREGeorgetown.com, HEREGreenwood.com, HEREGreenville.com, HEREHiltonHead.com, HEREIrmo.com, HEREMyrtleBeach.com, HERENewberry.com, HERERockHill.com, and HERESpartanburg.com, we provide comprehensive, credible insights into South Carolina's dynamic landscape.
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