Riley, IN Climate


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United States / Indiana / Terre Haute Metro Area / Vigo County / Riley / Zip Codes
Riley, IN has a humid continental climate, with four distinct seasons. Summers are hot and humid, with temperatures reaching up to the 90s. Winters are cold and snowy, with temperatures often dropping into the single digits. Spring brings heavy rains and the chance of flooding while fall brings cooler temperatures and beautiful foliage. Overall, Riley experiences moderate weather changes throughout the year, making it an ideal place to enjoy outdoor activities at any time of year.

Riley, Indiana gets 43 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Riley averages 17 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 188 sunny days per year in Riley. The US average is 205 sunny days.

Riley gets some kind of precipitation, on average, 115 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.

Weather Highlights

Summer High: the July high is around 87 degrees
Winter Low: the January low is 20
Rain: averages 43 inches of rain a year
Snow: averages 17 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Riley is 7.1 (10=best), which means it is more comfortable than most places in Indiana.

8.2 Summer - 5.2 Winter
September, June and May are the most pleasant months in Riley, while January and December are the least comfortable months.

  ClimateRiley, IndianaUnited States
    Unlock38.1 in.
  16.7 in.  Unlock
    Unlock106.2 days
  188 days  Unlock
  86.5°85.8°
    Unlock21.7°
  7.1  Unlock
    Unlock4.3
  568 ft.  Unlock
Climate
YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

July is the hottest month for Riley with an average high temperature of 86.5°, which ranks it as warmer than most places in Indiana. In Riley, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Riley are September, May and June.
In Riley, there are 21.2 days annually when the high temperature is over 90°, which is hotter than most places in Indiana.
January has the coldest nighttime temperatures for Riley with an average of 19.9°. This is warmer than most places in Indiana.
In Riley, there are 109.4 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Indiana.
In Riley, there are 3.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Indiana.
The humidity can be uncomfortably heavy or close in Riley during the summer months. July is the most humid month, though humidity is low for most of the year. July, August and June are the three most humid months in Riley.
May is the wettest month in Riley with 5.6 inches of rain, and the driest month is February with 2.1 inches. The wettest season is Summer with 30% of yearly precipitation and 16% occurs in Spring, which is the driest season. The annual rainfall of 42.6 inches in Riley means that it is about average compared to other places in Indiana.
May is the rainiest month in Riley with 11.7 days of rain, and September is the driest month with only 7.2 rainy days. There are 114.9 rainy days annually in Riley, which is less rainy than most places in Indiana. The rainiest season is Summer when it rains 29% of the time and the driest is Winter with only a 21% chance of a rainy day.
An annual snowfall of 16.7 inches in Riley means that it is less snowy than most places in Indiana. January is the snowiest month in Riley with 6.5 inches of snow, and 4 months of the year have significant snowfall.
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