Sumter (SC) monthly weather averages

Contents

Average daytime temperature

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

Sumter average temperature chart (Celsius) Sumter average temperature chart (Fahrenheit)
Average monthly temperatures in Sumter (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 12.4 14.7 19.4 23.9 27.8 30.7 32.2 31.5 28.8 24 19.2 14.3
°F 54.3 58.4 66.9 75 82 87.3 90 88.7 83.8 75.1 66.6 57.7

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.

Sumter monthly rainfall chart (mm) Sumter monthly rainfall chart (inches)
Average monthly rainfall in Sumter (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 95 93 112 77 90 136 142 130 91 75 63 79
inches 3.8 3.7 4.4 3 3.5 5.3 5.6 5.1 3.6 2.9 2.5 3.1
Rainy days 10 9 10 8 9 10 12 11 8 6 7 9

Average annual rainfall in Sumter: 1135.4mm (447 inches)

Average daily sunshine

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

Sumter average daily sunshine chart
Average daily sunshine Sumter
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 6.2 7 8.2 9.6 10 10 9.8 9 8.3 8 6.9 6.2

Day / night temperatures

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

Sumter average minimum / maximum temperatures (Celsius) Sumter average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Sumter (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 0.1 1.6 5.9 9.6 14.1 18.4 20.3 20 16.7 9.9 5.3 1.6
Max °C 12.7 15 19.7 24.3 28.1 31.1 32.5 31.8 29.1 24.3 19.6 14.6
Min °F 32.2 34.9 42.6 49.2 57.4 65 68.5 68 62.1 49.8 41.5 34.9
Max °F 43.5 46.9 55 62.4 70 76.5 79.5 78.6 73.2 62.8 54.3 46.6

Sea temperature

The graph below shows the average sea temperature.

Sumter average sea temperature chart (Celsius) Sumter average sea temperature chart (Fahrenheit)
Average sea temperature around Sumter in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 19.7 19.1 18.9 19.7 22.7 26 27.9 28.2 27.3 24.7 22.1 20.7
°F 67.4 66.3 65.9 67.5 72.8 78.8 82.2 82.7 81.1 76.5 71.7 69.3

Wind speed

The graph below shows the average wind speed.

Sumter average winspeed by month (km/h) Sumter average winspeed by month (mph)
Average wind speed in Sumter (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 14 15 15 15 13 13 12 11 12 12 12 13
mph 9 9 9 9 8 8 7 7 7 7 8 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.

Sumter relative humidity averages
Average relative humidity in Sumter
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
69% 66% 66% 64% 70% 72% 74% 77% 76% 73% 72% 71%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Sumter weather stats

Sumter weather statistics
Hottest month: July 32.2°C 90°F
Driest month: November 63mm 2.5ins
Sunniest month: April 9.6hrs
Coldest month: January 12.4°C 54.3°F
Wettest month: July 142mm 5.6ins
Warmest sea: August 28.2°C 82.8°F
Map showing location of Sumter (33.92044, -80.34147) Sumter map pin © Google

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