May weather forecast
Knysna, South Africa

Weather in May

The last month of the autumn, May, is also a moderately hot month in Knysna, South Africa, with an average temperature fluctuating between 23°C (73.4°F) and 10°C (50°F).

Temperature

In May, the average high-temperature is essentially the same as in April - a still moderately hot 23°C (73.4°F). In Knysna, South Africa, in May, the average low-temperature is 10°C (50°F).

Rainfall

In Knysna, in May, during 9 rainfall days, 39mm (1.54") of precipitation is typically accumulated. In Knysna, South Africa, during the entire year, the rain falls for 145 days and collects up to 719mm (28.31") of precipitation.

Sea temperature

In Knysna, South Africa, the average seawater temperature in May is 17.5°C (63.5°F).
Note: For most, swimming in 17.5°C (63.5°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

Daylight

The average length of the day in May is 10h and 22min.
On the first day of May in Knysna, sunrise is at 07:02 and sunset at 17:47. On the last day of the month, sunrise is at 07:24 and sunset at 17:26 SAST.

Sunshine

The months with the least sunshine in Knysna are May and June, with an average of 7h of sunshine.

UV index

May through July, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In May, the average maximum UV index of 3 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in May in Knysna?

In Knysna, in May, the average high-temperature is 23°C (73.4°F), and the average low-temperature is 10°C (50°F).

How much does it rain in Knysna in May?

In May, in Knysna, the rain falls for 9 days. Throughout May, 39mm (1.54") of precipitation is accumulated.

How cold is the water in May in Knysna?

In Knysna, the average seawater temperature in May is 17.5°C (63.5°F). For most, swimming in 17.5°C (63.5°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

What is the average length of the day in May in Knysna?

In Knysna, South Africa, the average day length in May is 10h and 22min.

What time are sunrise and sunset in May in Knysna?

In May, on the first day of the month, sunrise is at 07:02 and sunset at 17:47. On the last day of the month, in Knysna, South Africa, sunrise is at 07:24 and sunset at 17:26 SAST.

What are the months with the least sunshine in Knysna?

The months with the least sunshine in Knysna are May and June, with an average of 7h of sunshine.

How long on average sun shines in May in Knysna?

In Knysna, South Africa, the average sunshine duration in May is 7h.

What is the month with the lowest UV index in Knysna?

The months with the lowest UV index in Knysna are May through July, with an average maximum UV index of 3.

How high is the UV index in May in Knysna?

In May, the average daily maximum UV index in Knysna, South Africa, is 3. A UV Index estimate of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
Average rainfall days
Average sunshine
Average UV index

Average temperature in May
Knysna, South Africa

Average temperature in May - Knysna, South Africa
  • Average high temperature in May: 23°C

The warmest months (with the highest average high temperature) are January and February (26°C).
The months with the lowest average high temperature are June, July, August and September (21°C).

  • Average low temperature in May: 10°C

The month with the highest average low temperature is February (16°C).
The coldest month (with the lowest average low temperature) is July (7°C).

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Average rainfall in May
Knysna, South Africa

Average rainfall in May - Knysna, South Africa
  • Average rainfall in May: 38.5mm

The wettest month (with the highest rainfall) is November (93.7mm).
The driest month (with the least rainfall) is June (31.7mm).

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Average rainfall days in May
Knysna, South Africa

Average rainfall days in May - Knysna, South Africa
  • Average rainfall days in May: 9 days

The months with the highest number of rainy days are January, March and October (14 days).
The month with the least rainy days is May (9 days).

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Average sea temperature in May
Knysna, South Africa

Average sea temperature in May - Knysna, South Africa
  • Average sea temperature in May: 17.5°C

The best month for swimming (with the highest average sea temperature) is January (20.4°C).
The coldest months (with the lowest average sea temperature) are July and August (16.8°C).

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Average daylight in May /
Average sunshine in May
Knysna, South Africa

Average daylight in May / Average sunshine in May - Knysna, South Africa
  • Average daylight in May: 10h and 22min

The month with the longest days is December (Average daylight: 14h and 23min).
The month with the shortest days is June (Average daylight: 9h and 55min).

  • Average sunshine in May: 7h

The months with the most sunshine are January and February (Average sunshine: 10h).
The months with the least sunshine are May and June (Average sunshine: 7h).

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Average UV index in May
Knysna, South Africa

Average UV index in May - Knysna, South Africa
  • Average UV index in May: 3

The months with the highest UV index are January and December (UV index 12).
The months with the lowest UV index are May, June and July (UV index 3).

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