Annual mean 18°C · wettest around September · prevailing wind SW
Warmest
25.0 °C
Coldest
16.5 °C
Wettest
77%
Windiest
3.4 m/s
Prevailing
SW
2.7 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Knysna over the whole year is 18°C. February is the hottest month, with highs of about 25°C; August is the coldest, with lows of about 10°C. Knysna has no sharply defined rainy season: the chance of rain on a given day runs from 34% in December, the driest month, to 56% in September, the wettest. Winds in Knysna are highest in October, averaging 2.3 m/s (8 km/h), and lightest in May, at 1.6 m/s (6 km/h). The prevailing wind is from the SW. The clearest skies in Knysna come in July, when the sky is typically 46% covered; January is the cloudiest month, at 61%.
Month by month Knysna climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
25°C
18°C
25°C
35%
61%
2.2 m/s
69
46
34
February
25°C
18°C
25°C
36%
58%
2.0 m/s
73
46
34
March
23°C
17°C
24°C
38%
59%
1.9 m/s
75
33
45
April
22°C
15°C
21°C
36%
56%
1.7 m/s
76
20
60
May
20°C
13°C
19°C
34%
50%
1.6 m/s
80
9
73
June
18°C
12°C
17°C
38%
47%
1.7 m/s
63
7
75
July
17°C
11°C
15°C
45%
46%
1.9 m/s
55
2
78
August
17°C
10°C
15°C
44%
48%
2.1 m/s
54
3
77
September
19°C
12°C
17°C
56%
55%
2.1 m/s
63
5
75
October
20°C
14°C
19°C
46%
58%
2.3 m/s
72
10
70
November
22°C
15°C
20°C
44%
58%
2.1 m/s
80
14
65
December
23°C
17°C
23°C
34%
60%
2.2 m/s
80
34
47
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Knysna weather by season
Year round, Knysna has days of about 17°C at their warmest in July, its coolest month, and 25°C in February, its warmest; the coolest hours of the day run from 10°C to 18°C through the year, and the average temperature over the year is 18°C around the clock. Rain is most likely around September and least likely around December. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Knysna weather in winterJune to August
High 18°CLow 11°CRain 42%
Winter in Knysna has typical daily highs of about 18°C and lows of about 11°C, with a 42% chance of rain on a given day.
Knysna weather in springSeptember to November
High 20°CLow 14°CRain 49%
Spring in Knysna has typical daily highs of about 20°C and lows of about 14°C, with a 49% chance of rain on a given day.
Knysna weather in summerDecember to February
High 24°CLow 18°CRain 35%
Summer in Knysna has typical daily highs of about 24°C and lows of about 18°C, with a 35% chance of rain on a given day.
Knysna weather in autumnMarch to May
High 22°CLow 15°CRain 36%
Autumn in Knysna has typical daily highs of about 22°C and lows of about 15°C, with a 36% chance of rain on a given day.
When is the rainy season in Knysna?
Knysna has no sharply defined rainy season: the chance of rain on a given day runs from 34% in December, the driest month, to 56% in September, the wettest.
What time of year is Knysna windiest?
Winds in Knysna are highest in October, averaging 2.3 m/s (8 km/h), and lightest in May, at 1.6 m/s (6 km/h). The prevailing wind is from the SW.
What is the average temperature in Knysna year round?
The average temperature in Knysna over the whole year is 18°C. February is the hottest month, with highs of about 25°C; August is the coldest, with lows of about 10°C.