Winter
Dec → Feb2 to 5°
nights -6 to -3°
- 8 rainy days · 72 mm
When is the best time to visit Indianapolis?
- Jan2°not recommended
- Feb5°not recommended
- Mar11°not recommended
- Apr18°fair
- May23°recommended
- Jun28°recommended
- Jul30°fair
- Aug29°fair
- Sep26°recommended
- Oct19°recommended
- Nov11°fair
- Dec5°not recommended
RecommendedFairNot recommended· afternoon temperature
The weather in Indianapolis, month by month
The table of averages, month by month
| Month | High | Low | Rainfall | Rainy days | Best |
|---|---|---|---|---|---|
| January | 2° | -6° | 79 mm | 9 d | |
| February | 5° | -4° | 62 mm | 7 d | |
| March | 11° | 1° | 94 mm | 9 d | |
| April | 18° | 6° | 110 mm | 10 d | |
| May | 23° | 12° | 121 mm | 11 d | ✓ |
| June | 28° | 17° | 126 mm | 9 d | ✓ |
| July | 30° | 19° | 112 mm | 8 d | |
| August | 29° | 18° | 81 mm | 7 d | |
| September | 26° | 14° | 80 mm | 6 d | ✓ |
| October | 19° | 8° | 82 mm | 7 d | ✓ |
| November | 11° | 2° | 88 mm | 8 d | |
| December | 5° | -3° | 74 mm | 8 d |
The four seasons in Indianapolis, in figures
What the 2015-2024 averages (Indianapolis Airport) show, season by season, to compare at a glance instead of reading twelve rows of a table.
Spring
Mar → May11 to 23°
nights 1 to 12°
- 10 rainy days · 108 mm
Summer
Jun → Aug28 to 30°
nights 17 to 19°
- 8 rainy days · 106 mm
Autumn
Sep → Nov11 to 26°
nights 2 to 14°
- 7 rainy days · 83 mm
Book early for May to June and September to October
The timing is right, so it is right for everyone: in these months the best places to stay and the small-group tours go first. Here is where to start.
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Daylight in Indianapolis, month by month
The time between sunrise and sunset, from shortest to longest. Not to be confused with the sunshine hours in the table above, which count clear skies. In June there are 14h58 of daylight, in December 9h22, a difference of 5h36.
9h39Jan
10h39Feb
11h50Mar
13h12Apr
14h21May
14h58Jun
14h43Jul
13h43Aug
12h23Sep
11h04Oct
9h56Nov
9h22Dec
Calculated for the latitude of the reference point "Indianapolis Airport" (39.71°). Values on the 15th of each month, local solar time.
What to do in Indianapolis, month by month
What to see and do
| Activity | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sightseeing & walks | ||||||||||||
| Long days |
favourablewith compromisesunfavourable
- Sightseeing & walks: March, April, May, June, July, August, September, October, November
- Long days: May, June, July
Grid derived from the climate averages (temperature, rainfall), not from an opinion.
Travelling off-peak
Month by month, in detail
January
Not recommended2°-6° at night
- 79 mm · 9 d
Low season, lower prices
February
Not recommended5°-4° at night
- 62 mm · 7 d
Low season, lower prices
March
Not recommended11°1° at night
- 94 mm · 9 d
Low season, lower prices
April
Fair18°6° at night
- 110 mm · 10 d
Low season, lower prices
May
Recommended23°12° at night
- 121 mm · 11 d
Busy, without the crush
June
Recommended28°17° at night
- 126 mm · 9 d
Busy, without the crush
July
Fair30°19° at night
- 112 mm · 8 d
Busy, without the crush
August
Fair29°18° at night
- 81 mm · 7 d
Busy, without the crush
September
Recommended26°14° at night
- 80 mm · 6 d
Busy, without the crush
October
Recommended19°8° at night
- 82 mm · 7 d
Busy, without the crush
November
Fair11°2° at night
- 88 mm · 8 d
Low season, lower prices
December
Not recommended5°-3° at night
- 74 mm · 8 d
Quiet, then the holidays
Read the twelve months in detail
January. Deep winter: 2 °C at the warmest of the day, -6 °C at night. Expect 9 days of rain in the month (79 mm). Low season: fewer people, lower prices.
February. Deep winter: 5 °C at the warmest of the day, -4 °C at night. Rain stays light: 62 mm over 7 days. Low season: fewer people, lower prices.
March. Cool: 11 °C at best, 1 °C at night. Expect 9 days of rain in the month (94 mm). Low season: fewer people, lower prices.
April. Mild, 18 °C in the afternoon and 6 °C early in the morning. Expect 10 days of rain in the month (110 mm). Low season: fewer people, lower prices.
May. Mild, 23 °C in the afternoon and 12 °C early in the morning. Expect 11 days of rain in the month (121 mm). Busy season, without the crush.
June. 28 °C in the afternoon and 17 °C at night. Expect 9 days of rain in the month (126 mm). Busy season, without the crush.
July. 30 °C in the afternoon and 19 °C at night. Expect 8 days of rain in the month (112 mm). Busy season, without the crush.
August. 29 °C in the afternoon and 18 °C at night. Rain stays light: 81 mm over 7 days. Busy season, without the crush.
September. 26 °C in the afternoon and 14 °C at night. Rain stays light: 80 mm over 6 days. Busy season, without the crush.
October. Mild, 19 °C in the afternoon and 8 °C early in the morning. Rain stays light: 82 mm over 7 days. Busy season, without the crush.
November. Cool: 11 °C at best, 2 °C at night. Expect 8 days of rain in the month (88 mm). Low season: fewer people, lower prices.
December. Deep winter: 5 °C at the warmest of the day, -3 °C at night. Expect 8 days of rain in the month (74 mm). Quiet at the start of the month, then busier as the holidays approach.
Same season, other ideas
Their best time overlaps with this one: worth comparing before you book.
Frequently asked questions
When is the best time to visit Indianapolis?
May to June and September to October: over these months, average highs range from 19 to 28 °C, with 8 days of rain a month on average (2015-2024 averages, Indianapolis Airport).
Which month should you avoid in Indianapolis?
March: it is the wettest of the months to avoid, with 94 mm over 9 days of rain on average over 2015-2024 at the reference point (Indianapolis Airport).
What is the hottest month in Indianapolis?
July, with 30 °C on average in the afternoon and 19 °C at night. 2015-2024 averages (Indianapolis Airport).
What is the coldest month in Indianapolis?
January, with 2 °C at best during the day and -6 °C at night. 2015-2024 averages (Indianapolis Airport).
What is the driest month in Indianapolis?
February: 62 mm over 7 days of rain, against 126 mm in June, the wettest month.
Does it get cold at night in Indianapolis?
The gap between day and night reaches 12 °C in April: 18 °C in the afternoon, 6 °C at dawn. Pack an extra layer, even in high season.
Plan this trip
📒 The free printable Indianapolis guide: itinerary, map, where to sleep→
🧭 When to visit the American West: the country overview→
🗓️ Best time to visit: all our destinations→
Compare with other destinations
Photos: Michael Barera / CC BY-SA 4.0 (Wikimedia Commons) · Dan Keck / CC0 (Wikimedia Commons) · Mike Steele / CC BY 2.0 (Wikimedia Commons) · Deb Nystrom / CC BY 2.0 (Wikimedia Commons) · Pam Broviak from Geneva, IL, USA / CC BY-SA 2.0 (Wikimedia Commons) · Missvain / CC BY 4.0 (Wikimedia Commons) · Daniel Schwen / CC BY-SA 4.0 (Wikimedia Commons) · w_lemay / CC BY-SA 2.0 (Wikimedia Commons)