Indianapolis reached 90°F (32.2°C) this Friday, July 4, marking the 10th 90-degree day of the year and the warmest Independence Day since 2022. While humidity is beginning to climb, it still remains noticeably lower than what Central Indiana experienced during June’s extreme heat wave. Whether you’re attending one of the many holiday events across the region or staying in with friends and family, expect the evening to stay warm and slightly muggy. The best part? No rain for fireworks this year.
The holiday weekend will largely remain dry, but with each passing day, the heat and moisture in the air will become more intense. Both Saturday and Sunday will see high temperatures hovering around 90°F (32.2°C), with certain areas likely climbing into the low 90s (33–34°C). Humidity levels will steadily rise and are expected to peak on Sunday, pushing heat indices in some towns near the 100°F (37.8°C) mark. By Sunday evening, the first in a series of storm chances begins to emerge across central Indiana.
These changes are tied to the season’s second hot dome, a large upper-level ridge that is expanding eastward and will gain strength throughout the weekend. While this pattern brings prolonged heat, it may not reach the same extreme highs seen during late June. Still, daily dew points will remain elevated, locking in that humid, sticky feel well into next week.
As we edge into the workweek, Central Indiana finds itself on the outer boundary of the hot dome, where the so-called “ring of fire” begins to set up. This meteorological zone often brings clusters of thunderstorms—scattered but intense—especially in the late afternoon and evening hours.
Next week’s temperatures will stay slightly above normal, with highs mostly in the upper 80s (31–32°C). While much of the day will remain dry, brief and isolated storms could develop at times due to the persistent moist and unstable air mass.
