Decatur (TN) monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Decatur

Decatur average temperature chart (Celsius) Decatur average temperature chart (Fahrenheit)
Average monthly temperatures in Decatur (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 7.6 10.2 15.8 21.3 25.2 29.1 30.6 30.2 27 21.4 15.4 9.8
°F 45.7 50.4 60.5 70.3 77.4 84.4 87.1 86.4 80.6 70.6 59.7 49.6

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Decatur monthly rainfall chart (mm) Decatur monthly rainfall chart (inches)
Average monthly rainfall in Decatur (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 117 113 146 107 116 98 126 97 98 80 114 130
inches 4.6 4.5 5.8 4.2 4.6 3.9 5 3.8 3.9 3.1 4.5 5.1
Rainy days 11 10 12 10 11 10 11 10 8 8 10 11

Average annual rainfall in Decatur: 1293.533mm (509.3 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Decatur

Decatur average daily sunshine chart
Average daily sunshine Decatur
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 4.9 5.7 6.9 8.6 9.5 9.9 9.4 9.1 8.1 7.5 5.5 4.6

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Decatur average minimum / maximum temperatures (Celsius) Decatur average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Decatur (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -3.1 -1.5 3.1 7.4 11.9 16.4 18.9 18.5 15.1 7.9 3.3 -1.1
Max °C 7.9 10.5 16.2 21.6 25.6 29.4 30.9 30.5 27.3 21.8 15.7 10.1
Min °F 26.5 29.3 37.5 45.3 53.3 61.5 66 65.3 59.2 46.1 37.9 30.1
Max °F 36.3 40.1 49.3 58.1 65.7 73.2 76.8 76.1 70.2 58.6 49.1 40.1

Sea temperature

The graph below shows the average sea temperature.

Decatur average sea temperature chart (Celsius) Decatur average sea temperature chart (Fahrenheit)
Average sea temperature around Decatur in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 12.1 11.3 11.7 13.6 17.2 21.9 25.5 26.4 24.8 20.9 16.9 14
°F 53.8 52.4 53 56.4 63 71.4 77.9 79.5 76.6 69.6 62.5 57.2

Wind speed

The graph below shows the average wind speed.

Decatur average winspeed by month (km/h) Decatur average winspeed by month (mph)
Average wind speed in Decatur (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 13 14 14 13 12 10 10 9 9 10 12 13
mph 8 9 9 8 7 7 6 6 6 6 7 8

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Decatur relative humidity averages
Average relative humidity in Decatur
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
71% 68% 65% 63% 71% 73% 75% 76% 76% 73% 72% 73%

Other monthly averages

UV index Best time to go?

Decatur weather stats

Decatur weather statistics
Hottest month: July 30.6°C 87.1°F
Driest month: October 80mm 3.1ins
Sunniest month: June 9.9hrs
Coldest month: January 7.6°C 45.7°F
Wettest month: March 146mm 5.7ins
Warmest sea: August 26.4°C 79.5°F
Map showing location of Decatur (35.51479, -84.79022) Decatur map pin © Google

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