Current Conditions and Immediate Outlook
At the moment Indianapolis is shrouded in a thick blanket of fog that has cut visibility down to roughly a quarter of a mile. The National Weather Service has placed the area under a dense fog advisory that will stay active until 9 a.m. on Tuesday. Temperatures hover between 66°F and 67°F, the sky is mostly cloudy, and relative humidity is an oppressive 93 percent.
Tonight the fog will start to lift, but the night won’t be dry. Isolated showers and a few brief thunderstorms are likely, especially after midnight. As the rain wanes, patchy fog will return around the early morning hours. Low temperatures will dip to the mid‑60s, and a light north‑northwest breeze of 3–6 mph will keep the air feeling damp. The chance of precipitation for the evening sits around 20 percent.
Tuesday morning will begin with lingering fog in pockets across the city, but the sun should break through by mid‑day, giving way to partly sunny skies. Despite the clearer outlook, humidity will stay high and the thermometer will climb to an uncomfortable 80–81°F. A stray rain shower could pop up at any point, and a more organized line of showers is expected to develop after sunset as temperatures fall to the mid‑60s.
Midweek to Weekend Forecast
Wednesday brings a continuation of unsettled weather. Showers and occasional thunderstorms are on the menu, with daytime highs cooling to the low‑70s (71–74°F). Overnight lows will descend into the low‑60s, providing a brief respite from the heat. Thursday follows a similar pattern: scattered showers throughout the day, highs staying in the mid‑70s, and a noticeable dip in nighttime temperatures to around 56–57°F.
By Friday the atmospheric river that has been feeding rain into the region starts to weaken. The forecast calls for only a slight chance of showers or thunderstorms, allowing high temperatures to climb back up to the mid‑70s while lows remain in the upper 50s. This transition sets the stage for a much more pleasant weekend.
Saturday and Sunday are expected to be dry and mostly sunny. Daytime temperatures will settle in the comfortable 70–74°F range, and nighttime lows will stay near 58°F, making it ideal for outdoor activities. The clear skies will also help improve the city’s air quality, which has been rated as “poor” today and poses a health risk for people with respiratory sensitivities.
Looking ahead to the extended period, the wet spell that has dominated the forecast through Thursday is likely to give way to a more stable, drier air mass early next week. Residents should keep an eye on any updates from the weather service, especially if they need to plan travel or outdoor events, as fog and sudden rain showers can still pop up unexpectedly.
For those with asthma, COPD, or other breathing issues, it is advisable to limit outdoor exposure today and use indoor air filtration if possible. The combination of high humidity, low visibility, and poor air quality creates a perfect storm of discomfort that should be taken seriously.
