Indianapolis
Indiana, USA
Long-term weather forecast
Long-term weather forecast
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May weather forecast and Climate
Indianapolis, IN

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The magnificent Monument Circle in Indianapolis, Indiana with the surrounding cityscape, and a perfect blue night sky
The magnificent Monument Circle in Indianapolis, Indiana with the surrounding cityscape, and a perfect blue night sky
May is the wettest month of the year in Indianapolis with an average rainfall of 5" (127mm). The daily sunshine is around 8.5 hours, which keeps the average temperatures in the warm 53.1°F (11.7°C) to 73°F (22.8°C) range and sees visitors despite the rain. Spring is the season of blooming flowers, abundant freshwater flowing in the rivers and creeks, and the sweet aroma of the soil.
The long 14-hour days are free of snow, and the landscape is green everywhere. For a few people, the spring season is the time of allergies with pollen circulating in the air.
Overall, the May weather is comfortable except for the rain.
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  • The average high temperature in May: 72.8°F

The warmest month (with the highest average high temperature) is July (85°F).
The month with the lowest average high temperature is January (35.6°F).

  • The average low temperature in May: 52.6°F

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).

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  • The average humidity in May: 67.1%

The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is April (65.6%).

  • The average rainfall in May: 5.1"

The wettest month (with the highest rainfall) is May (5.1").
The driest month (with the lowest rainfall) is February (2.3").

  • The average rainfall days in May: 13.1 days

The month with the highest number of rainy days is May (13.1 days).
The month with the lowest number of rainy days is September (8.1 days).

  • The average snowfall in May: 0"

The month with the highest snowfall is January (8.6").
Months with the lowest snowfall are May, June, July, August and September (0").

  • The average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (7.5 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

  • The average daylight in May: 14h

Months with the longest days are June and July (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9h).

  • The average sunshine in May: 8.5h

The month with most sunshine is June (Average sunshine: 9.6h).
The month with least sunshine is December (Average sunshine: 3.3h).

  • The average UV index in May: 8

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January, November and December (UV index 2).

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