INDIANA, USA — June has the longest days of the year across the United States and the entire northern hemisphere, thanks to the summer solstice. This month has the highest sun angle and brings early sunrises and late sunsets. There will be a few more minutes of daylight gained across the country before we start losing it at the end of the month and into July.
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June has only a little bit left to give for more daylight. The farther north you go, the more minutes you'll gain. Many months through late winter and spring, we gain 40-80 minutes across the United States. Now, we only have a handful of minutes to add.
The majority of the United States will add 5 to 8 minutes of extra daylight by June 30.
June is a bit trickier on daylight calculations because we add daylight all the way to the summer solstice, which for 2024 is June 20. Afterwards, we start losing daylight again.
The map shows the net gain of daylight for the entire month after those small subtractions.
July is the first full month of daylight losses. Weather is delayed from daylight. The air gets hotter in July and August, even though we start losing small amounts of daylight. We won't notice big cooler spells of weather until September and October.
What about Indiana?
Indiana is cut into two pieces for daylight. It's not much of a difference, but northern Indiana gains another 8 minutes, while central and southern Indiana gain 7 minutes by June 30.
For Indianapolis specifically, our longest day of the year has just over 15 hours of daylight. That's June 20.
Notice by June 30, we are gradually back into the 14-hour range.
Sunsets get a little tricky, thanks to the curvature of the Earth and how light bends near the surface. Indianapolis' latest sunset is June 27 at 9:18 p.m.