Erwin, TN Climate


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United States / Tennessee / Johnson City Metro Area / Unicoi County / Erwin / Zip Codes
Erwin, TN has a humid subtropical climate with hot and humid summers and mild winters. Rainfall is plentiful throughout the year, with the most occurring in May and June. In summer months, temperatures can reach into the 90s Fahrenheit (32 Celsius) while winter temperatures can drop to as low as freezing. The city experiences four distinct seasons; spring, summer, fall and winter, each season bringing its own unique weather patterns.

Erwin, Tennessee gets 44 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Erwin averages 10 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 197 sunny days per year in Erwin. The US average is 205 sunny days.

Erwin gets some kind of precipitation, on average, 135 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 86 degrees
Winter Low: the January low is 26
Rain: averages 44 inches of rain a year
Snow: averages 10 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Erwin is 7.6 (10=best), which means it is one of the most pleasant places in Tennessee.

8.6 Summer - 5.9 Winter
September, June and May are the most pleasant months in Erwin, while January and December are the least comfortable months.

  ClimateErwin, TennesseeUnited States
    Unlock38.1 in.
  10.4 in.  Unlock
    Unlock106.2 days
  197 days  Unlock
  85.5°85.8°
    Unlock21.7°
  7.6  Unlock
    Unlock4.3
  1673 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 Erwin with an average high temperature of 85.5°, which ranks it as cooler than most places in Tennessee. In Erwin, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Erwin are September, May and June.
In Erwin, there are 14.5 days annually when the high temperature is over 90°, which is cooler than most places in Tennessee.
January has the coldest nighttime temperatures for Erwin with an average of 25.7°. This is colder than most places in Tennessee.
In Erwin, there are 94.0 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Tennessee.
In Erwin, there are 0.7 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Tennessee.
The humidity is usually comfortable in Erwin but some summer months can be sticky or muggy. July is the most humid month, though humidity is low for most of the year. The most humid months are July, August and June.
July is the wettest month in Erwin with 5.3 inches of rain, and the driest month is October with 2.2 inches. The wettest season is Autumn with 32% of yearly precipitation and 19% occurs in Winter, which is the driest season. The annual rainfall of 44.0 inches in Erwin means that it is one of the driest places in Tennessee.
July is the rainiest month in Erwin with 13.0 days of rain, and October is the driest month with only 8.3 rainy days. There are 134.6 rainy days annually in Erwin, which is one of the rainiest places in Tennessee. The rainiest season is Autumn when it rains 27% of the time and the driest is Winter with only a 20% chance of a rainy day.
An annual snowfall of 10.4 inches in Erwin means that it is one of the snowiest places in Tennessee. January is the snowiest month in Erwin with 3.7 inches of snow, and 5 months of the year have significant snowfall.
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