May weather forecast
Indianapolis, IN

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The magnificent Monument Circle in Indianapolis, Indiana with the surrounding cityscape
The magnificent Monument Circle in Indianapolis, Indiana with the surrounding cityscape

Weather in May

May brings with it the true essence of spring in Indianapolis. The climate attains a pleasant balance as temperatures hover around 71.8°F (22.1°C). Longer days provide ample sunshine to the city, ensuring beautiful days for picnics and walks in the parks. The rain washes the city, making the landscape sparkle with freshness. A perfect time to experience the charm of the city.

Temperature

With the transition into May, Indianapolis experiences an increase in average high-temperatures, moving up from a comfortable 61.5°F (16.4°C) in April to an agreeable 71.8°F (22.1°C). In the month of May, Indianapolis witnesses a consistent average low-temperature of 55.6°F (13.1°C).

Humidity

In Indianapolis, the average relative humidity in May is 79%.

Rainfall

May is the month with the most rainfall. Rain falls for 17.6 days and accumulates 2.68" (68mm) of precipitation.

Snowfall

May through October are months without snowfall in Indianapolis.

Daylight

The average length of the day in May is 14h and 23min.
On the first day of the month, sunrise is at 6:43 am and sunset at 8:39 pm. On the last day of May, sunrise is at 6:18 am and sunset at 9:06 pm EDT.

Sunshine

In May, the average sunshine in Indianapolis, Indiana, is 8.8h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.
Note: The UV index of 6 during May leads to these advisories:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Resources | Updated: Feb 12, 2024 | Published by: Weather U.S.

Frequently asked questions

What are the temperatures in Indianapolis in May?

In Indianapolis, 71.8°F (22.1°C) is the average high-temperature and 55.6°F (13.1°C) is the average low-temperature during May.

What is the average humidity in May in Indianapolis?

The average relative humidity in May in Indianapolis, Indiana, is 79%.

What is the wettest month in Indianapolis?

The month with the most rainfall in Indianapolis, Indiana, is May, when the rain falls for 17.6 days and typically aggregates up to 2.68" (68mm) of precipitation.

How many days does it rain in May in Indianapolis?

In Indianapolis, in May, it is raining for 17.6 days, with typically 2.68" (68mm) of accumulated precipitation.

When it does not snow in Indianapolis?

In Indianapolis, Indiana, snow does not fall in May through October.

Does it snow in Indianapolis in May?

In May, in Indianapolis, Indiana, it doesn't snow. April is the latest month when it typically snows.

What is the average length of the day in May in Indianapolis?

In May, the average day length is 14h and 23min.

When are sunrise and sunset in May in Indianapolis?

In May, on the first day of the month, sunrise is at 6:43 am and sunset at 8:39 pm. On the last day of the month, in Indianapolis, sunrise is at 6:18 am and sunset at 9:06 pm EDT.

How many hours of sunshine does Indianapolis have in May?

In May, the average sunshine duration in Indianapolis is 8.8h.

What is the month with the highest UV index in Indianapolis?

May through August, with an average maximum UV index of 6, are months with the highest UV index.

What is the UV index intensity in May in Indianapolis?

The average daily maximum UV index in May in Indianapolis is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Indianapolis, IN

Average temperature in May - Indianapolis, IN
  • Average high temperature in May: 71.8°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.4°F).

  • Average low temperature in May: 55.6°F

The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (21°F).

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Average pressure in May
Indianapolis, IN

Average pressure in May - Indianapolis, IN
  • Average pressure in May: 29.97"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in May
Indianapolis, IN

Average wind speed in May - Indianapolis, IN
  • Average wind speed in May: 7.8mph

The windiest months (with the highest average wind speed) are January and February (9.8mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).

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Average humidity in May
Indianapolis, IN

Average humidity in May - Indianapolis, IN
  • Average humidity in May: 79%

The month with the highest relative humidity is December (82%).
The month with the lowest relative humidity is October (73%).

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Average rainfall in May
Indianapolis, IN

Average rainfall in May - Indianapolis, IN
  • Average rainfall in May: 2.68"

The wettest month (with the highest rainfall) is May (2.68").
The driest month (with the least rainfall) is February (1.22").

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Average rainfall days in May
Indianapolis, IN

Average rainfall days in May - Indianapolis, IN
  • Average rainfall days in May: 17.6 days

The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is February (6.8 days).

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Average snowfall in May
Indianapolis, IN

Average snowfall in May - Indianapolis, IN
  • Average snowfall in May: 0"

The month with the highest snowfall is December (2.28").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in May
Indianapolis, IN

Average snowfall days in May - Indianapolis, IN
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is January (7.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in May /
Average sunshine in May
Indianapolis, IN

Average daylight in May / Average sunshine in May - Indianapolis, IN
  • Average daylight in May: 14h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in May: 8h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

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Average sunshine days in May
Indianapolis, IN

Average sunshine days in May - Indianapolis, IN
  • Average sunshine days in May: 11.1 days

The month with the most sunshine days is October (18.6 days).
The month with the least sunshine days is May (11.1 days).

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Average UV index in May
Indianapolis, IN

Average UV index in May - Indianapolis, IN
  • Average UV index in May: 6

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).

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Average cloud cover in May
Indianapolis, IN

Average cloud cover in May - Indianapolis, IN
  • Average cloud cover in May: 41

The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 29).

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Average visibility in May
Indianapolis, IN

Average visibility in May - Indianapolis, IN
  • Average visibility in May: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Indianapolis, Indiana, USA

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