Indianapolis weather by month & the best time to visit
United States · city break · humid subtropical climate
The best time to visit Indianapolis is September — its sunniest month (Sunshine Score 76/100), with August and July close behind. Indianapolis averages about 2,168 hours of sunshine a year. Daytime highs around 26°C / 79°F and roughly 83 mm of rain in September.
When is the best time to visit Indianapolis?
For sunshine, the best time to visit Indianapolis is September, then August and July. The dullest month is January (0/100, 81 mm of rain). The full month-by-month picture is in the table below.
How sunny is Indianapolis?
Indianapolis gets a moderate 2,168 hours of sunshine a year. 76 Sunshine Score points separate September (76) from January (0), so the month you pick matters. It ranks #333 of 580 destinations in United States for annual sunshine, below the national median of 2,279 hours. The year's 1,194 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV |
|---|---|---|---|---|---|
| January | 0 | 2° / 36°F | -7° / 19°F | 81 mm | 1 |
| February | 0 | 4° / 39°F | -6° / 21°F | 73 mm | 2 |
| March | 12 | 10° / 50°F | 0° / 32°F | 98 mm | 4 |
| April | 58 | 18° / 64°F | 6° / 43°F | 119 mm | 5 |
| May | 69 | 23° / 73°F | 12° / 54°F | 125 mm | 6 |
| June | 67 | 27° / 81°F | 17° / 63°F | 135 mm | 7 |
| July | 71 | 29° / 84°F | 19° / 66°F | 114 mm | 8 |
| August | 75 | 29° / 84°F | 18° / 64°F | 88 mm | 7 |
| September | 76 | 26° / 79°F | 14° / 57°F | 83 mm | 6 |
| October | 67 | 19° / 66°F | 7° / 45°F | 99 mm | 4 |
| November | 19 | 11° / 52°F | 0° / 32°F | 88 mm | 2 |
| December | 0 | 4° / 39°F | -4° / 25°F | 91 mm | 1 |
Nearest destinations
Head-to-head
How Indianapolis compares month by month: Indianapolis vs Cincinnati / Covington · Indianapolis vs Dayton · Indianapolis vs Fort Wayne · Indianapolis vs Evansville · all comparisons
Indianapolis: questions and answers
What kind of destination is Indianapolis?
Indianapolis is a city break in United States with a humid subtropical climate.
How many hours of sunshine does Indianapolis get a year?
Indianapolis gets about 2,168 hours of sunshine a year, at its best around September.
When is the best time to visit Indianapolis?
The sunniest time to visit Indianapolis is September, when the Sunshine Score peaks at 76/100 (with August and July close behind). Expect daytime highs around 26°C / 79°F.
What is the least sunny month in Indianapolis?
January is the least sunny month in Indianapolis, scoring 0/100 with about 81 mm of rain.
How strong is the sun in Indianapolis?
The typical midday UV index in Indianapolis peaks around 8 (very high) in July, easing to about 1 (low) in January. Month-by-month midday UV values are in the UV column of the table on this page.
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