Cool
Average highs are around 15°C, so pack for cooler days.
December verdict
Sumter, South Carolina, United States in December
Weather score33Poor
Poor for holiday weather
Average highs are around 15°C, so pack for cooler days. Sunshine averages 5.5h per day, enough for a balanced month. Rainfall averages 79mm, which is relatively low for holiday planning.
December weather
Monthly averages
Temp
15°C
Rain
79mm
Sun
5.5h
Weather score
33
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 79mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 5.5h per day, enough for a balanced month.
Map
Weather map
Compare Sumter, South Carolina, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December15°C average high
December has some of the coolest average daytime highs of the year, so pack for fresher conditions.
Warmest monthsMay to September
This stretch sets the upper range for average daytime heat.
Rain
December79mm average rain
December sits on the drier side of Sumter's year, which helps with sightseeing and transfers.
Driest monthsApril to May and September to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December5.5 hours average sun
December is one of Sumter's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsApril to July
This stretch has the strongest sunshine in the monthly averages.
Weather score
December33 weather score
December is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsMay to September
These months have the strongest weather score in the monthly averages.
