Knysna weather by month

Check out Knysna weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature
Rainfall
Sunshine & UV index

Temperature in Knysna (°C)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	23	24	22	22	20	19	18	18	18	19	21	22
Min temperature (night-time)	16	16	15	14	12	10	9	10	10	12	13	15
Heat & Humidity	0	0	0	0	0	0	0	0	0	0	0	0
Sea temperature	21	21	20	19	18	17	17	17	17	17	19	20

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & UV index in Knysna

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daily hours of sunshine	9	8	7	7	6	6	7	7	7	8	8	9
Daily hours of daylight	14	13	12	11	10	10	10	11	12	13	14	14
UV Index (Maximum)	11	11	9	6	3	3	3	4	6	8	11	11

Rainfall in Knysna

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Number of days with some rain	10	10	10	9	9	9	8	10	11	12	10	11
Average monthly rainfall (mm)	68	62	73	78	71	69	67	95	75	90	74	65

More about Knysna

Knysna by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for South Africa

Fred Olsen: Top cruise offers for 2026/2027

Sale

Explore latest offers on Fred Olsen Cruises in 2026/2027
Find last minute deals or early bird discounts
Filter offers by price, destination, ship & departure point

Go to Fred Olsen deal >>

View all Fred Olsen offers

Cruise deal finder

Destination

The climate guide for South Africa (Knysna) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Knysna?

Knysna has a temperate climate with warm summers and some rainfall in all months.

Knysna weather in January

Expect daytime maximum temperatures of 23°C in Knysna, South Africa in January based on long-term weather averages. There are 9 hours of sunshine per day on average with 10 days with some rainfall and typically 68 mm of rainfall in the month.

23
23°C max day temperature
9
9 hours of sunshine per day
10
10 days with some rainfall
16
16°C min night temperature
14
14 hours of daylight per day
0
No heat & humidity
68
68 mm of monthly rainfall
11
11+ (Extreme) UV index
21
21°C sea temperature

Back to months

Knysna weather in February

Expect daytime maximum temperatures of 24°C in Knysna, South Africa in February based on long-term weather averages. There are 8 hours of sunshine per day on average with 10 days with some rainfall and typically 62 mm of rainfall in the month.

24
24°C max day temperature
8
8 hours of sunshine per day
10
10 days with some rainfall
16
16°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
62
62 mm of monthly rainfall
11
11 (Extreme) UV index
21
21°C sea temperature

Back to months

Knysna weather in March

Expect daytime maximum temperatures of 22°C in Knysna, South Africa in March based on long-term weather averages. There are 7 hours of sunshine per day on average with 10 days with some rainfall and typically 73 mm of rainfall in the month.

22
22°C max day temperature
7
7 hours of sunshine per day
10
10 days with some rainfall
15
15°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
73
73 mm of monthly rainfall
9
9 (Very High) UV index
20
20°C sea temperature

Back to months

Knysna weather in April

Expect daytime maximum temperatures of 22°C in Knysna, South Africa in April based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 78 mm of rainfall in the month.

22
22°C max day temperature
7
7 hours of sunshine per day
9
9 days with some rainfall
14
14°C min night temperature
11
11 hours of daylight per day
0
No heat & humidity
78
78 mm of monthly rainfall
6
6 (High) UV index
19
19°C sea temperature

Back to months

Knysna weather in May

Expect daytime maximum temperatures of 20°C in Knysna, South Africa in May based on long-term weather averages. There are 6 hours of sunshine per day on average with typically 71 mm of rainfall in the month.

20
20°C max day temperature
6
6 hours of sunshine per day
9
9 days with some rainfall
12
12°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
71
71 mm of monthly rainfall
3
3 (Moderate) UV index
18
18°C sea temperature

Back to months

Knysna weather in June

Expect daytime maximum temperatures of 19°C in Knysna, South Africa in June based on long-term weather averages. There are 6 hours of sunshine per day on average with typically 69 mm of rainfall in the month.

19
19°C max day temperature
6
6 hours of sunshine per day
9
9 days with some rainfall
10
10°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
69
69 mm of monthly rainfall
3
3 (Moderate) UV index
17
17°C sea temperature

Back to months

Knysna weather in July

Expect daytime maximum temperatures of 18°C in Knysna, South Africa in July based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 67 mm of rainfall in the month.

18
18°C max day temperature
7
7 hours of sunshine per day
8
8 days with some rainfall
9
9°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
67
67 mm of monthly rainfall
3
3 (Moderate) UV index
17
17°C sea temperature

Back to months

Knysna weather in August

Expect daytime maximum temperatures of 18°C in Knysna, South Africa in August based on long-term weather averages. There are 7 hours of sunshine per day on average with 10 days with some rainfall and typically 95 mm of rainfall in the month.

18
18°C max day temperature
7
7 hours of sunshine per day
10
10 days with some rainfall
10
10°C min night temperature
11
11 hours of daylight per day
0
No heat & humidity
95
95 mm of monthly rainfall
4
4 (Moderate) UV index
17
17°C sea temperature

Back to months

Knysna weather in September

Expect daytime maximum temperatures of 18°C in Knysna, South Africa in September based on long-term weather averages. There are 7 hours of sunshine per day on average with 11 days with some rainfall and typically 75 mm of rainfall in the month.

18
18°C max day temperature
7
7 hours of sunshine per day
11
11 days with some rainfall
10
10°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
75
75 mm of monthly rainfall
6
6 (High) UV index
17
17°C sea temperature

Back to months

Knysna weather in October

Expect daytime maximum temperatures of 19°C in Knysna, South Africa in October based on long-term weather averages. There are 8 hours of sunshine per day on average with 12 days with some rainfall and typically 90 mm of rainfall in the month.

19
19°C max day temperature
8
8 hours of sunshine per day
12
12 days with some rainfall
12
12°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
90
90 mm of monthly rainfall
8
8 (Very High) UV index
17
17°C sea temperature

Back to months

Knysna weather in November

Expect daytime maximum temperatures of 21°C in Knysna, South Africa in November based on long-term weather averages. There are 8 hours of sunshine per day on average with 10 days with some rainfall and typically 74 mm of rainfall in the month.

21
21°C max day temperature
8
8 hours of sunshine per day
10
10 days with some rainfall
13
13°C min night temperature
14
14 hours of daylight per day
0
No heat & humidity
74
74 mm of monthly rainfall
11
11 (Extreme) UV index
19
19°C sea temperature

Back to months

Knysna weather in December

Expect daytime maximum temperatures of 22°C in Knysna, South Africa in December based on long-term weather averages. There are 9 hours of sunshine per day on average with 11 days with some rainfall and typically 65 mm of rainfall in the month.

22
22°C max day temperature
9
9 hours of sunshine per day
11
11 days with some rainfall
15
15°C min night temperature
14
14 hours of daylight per day
0
No heat & humidity
65
65 mm of monthly rainfall
11
11+ (Extreme) UV index
20
20°C sea temperature

Back to months