Weather

Daily Weather Brief for 18 June 2026: Indianapolis Turns Cooler With Clouds Before a Sunny Juneteenth

Central Indiana cools into the mid-70s Thursday with increasing clouds and lingering flooding concerns before sunshine returns Friday and Saturday.

By Jessica Storm · June 18, 2026
Email Reporter
Daily Weather Brief for 18 June 2026: Indianapolis Turns Cooler With Clouds Before a Sunny Juneteenth
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INDIANAPOLIS | Central Indiana gets a quieter weather day Thursday after Wednesday’s storms, with increasing clouds, a high near 76°F and lingering flooding concerns in parts of the region. The National Weather Service Indianapolis point forecast calls for west winds of 10 to 13 mph, with gusts as high as 23 mph, before skies gradually clear tonight and temperatures fall to around 58°F.

Thursday

Thursday will not be as stormy as Wednesday, but it will remain breezy at times. Indianapolis should see increasing clouds through the day, with the afternoon high near 76°F.

West winds of 10 to 13 mph may gust to about 23 mph. Those winds are not expected to create widespread damage, but they can move lightweight outdoor items and make driving feel less steady for high-profile vehicles on open roads.

The Hazardous Weather Outlook for central Indiana says flooding from earlier rain will continue today across portions of the area. Drivers should remain alert for standing water, closed roads and low-lying areas where runoff is slow to drain.

Thursday night

Mostly cloudy skies during the early evening should give way to gradual clearing overnight. The low should fall to around 58°F.

West-northwest winds of 5 to 7 mph are expected to become calm during the evening. The cooler air should make for a more comfortable night after the humid and stormy setup earlier in the week.

Juneteenth

Friday, observed as Juneteenth, should bring one of the best weather windows of the week. Indianapolis is forecast to be sunny, with a high near 78°F.

Winds will be light early, becoming west-northwest at 5 to 9 mph during the morning. Friday night should be partly cloudy, with a low around 60°F.

Outdoor ceremonies, community gatherings, travel and evening plans should have favorable weather, although anyone near creeks, rivers or low-water crossings should still respect any lingering flood issues from earlier rainfall.

Saturday

Saturday should stay mostly sunny and slightly warmer. The forecast high is near 81°F, with west winds of 3 to 8 mph.

Saturday night should be partly cloudy, with a low near 63°F. The day currently looks suitable for outdoor recreation, yard work, local events and travel.

Sunday

The next more active weather period arrives Sunday. Showers and thunderstorms are possible during the day, with showers likely and possibly a thunderstorm after 2 p.m.

Sunday’s high should reach about 80°F. The chance of precipitation is 60% during the day.

Sunday night looks wetter, with showers and possibly a thunderstorm expected. The low should be around 62°F, with a 90% chance of precipitation. Southeast winds may become northeast after midnight, with gusts as high as 22 mph.

Early next week

Showers remain likely Monday morning, possibly with a thunderstorm before 8 a.m., followed by a chance of showers through early afternoon. Monday should be mostly cloudy, with a high near 76°F and a low Monday night around 56°F.

Tuesday should turn sunny again, with a high near 78°F and a low near 59°F Tuesday night. Wednesday is forecast to be sunny with a high near 80°F.

Flooding and safety

The main weather concern Thursday is not a new severe-weather outbreak but leftover flooding from earlier rain. Do not drive through water covering a road. Water may be deeper than it looks, and pavement can be damaged beneath the surface.

Residents near flood-prone roads, low-lying areas, creeks and drainage ditches should continue to monitor local alerts. Children and pets should be kept away from fast-moving water.

For Sunday, keep a rain plan available for outdoor events. Lightning is possible with thunderstorms, and activities should move indoors when thunder is heard.

This forecast may change. Use current National Weather Service watches, warnings and advisories for immediate decisions.

Additional Reporting By: National Weather Service Indianapolis Point Forecast; National Weather Service Hazardous Weather Outlook; National Weather Service Indianapolis; NOAA.

What This Means

Thursday is a calmer recovery day for Indianapolis, with cooler temperatures, increasing clouds and lingering flooding concerns rather than a repeat of Wednesday’s severe-weather setup.

Juneteenth and Saturday look best for outdoor plans. Rain and thunderstorms return Sunday and Sunday night, so weekend events should have an indoor backup by late Sunday.

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