Mild
Average highs are around 22°C, so days are mild rather than hot.
December verdict
Good for holiday weather
Average highs are around 22°C, so days are mild rather than hot. Sunshine averages 9.1h per day, so bright days are a strong part of the month. Rainfall averages 65mm, which is relatively low for holiday planning.

Monthly averages
Temp
22°C
Rain
65mm
Sun
9.1h
Sea
20°C
Weather score
62
Good
Mild
Average highs are around 22°C, so days are mild rather than hot.
Drier
Rainfall averages 65mm, which is relatively low for holiday planning.
Bright
Sunshine averages 9.1h per day, so bright days are a strong part of the month.
Cool sea
Sea temperatures average 20°C, so the water can feel cool.
Map
Compare Knysna, South Africa with nearby places by weather score, rain, sun, temperature, and swim conditions.
December22°C average high
December sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJanuary to March and December
This stretch sets the upper range for average daytime heat.
December65mm average rain
December is one of Knysna's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsJanuary to July and September to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
December9.1 hours average sun
December is one of Knysna's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsJanuary to February and November to December
This stretch has the strongest sunshine in the monthly averages.
December20°C average sea
December sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJanuary to March and December
Sea temperatures are usually near 21°C in this stretch, so swimming comfort is at its strongest.
December62 weather score
December scores above Knysna's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsJanuary to March and December
These months have the strongest weather score in the monthly averages.