Knysna, South Africa: vitamin D, best months and travel guide
Lagoon town on the Garden Route with forests and oysters. Best for: couples, families, road-trippers.
The best months for vitamin D in Knysna are December to March, when a full dose takes about 6 minutes at midday. Too cool from April to November.
Knysna month by month
| Month | Rating | Sun window | Peak UV | Full dose, age 30 | Afternoon high | Rainy days |
|---|---|---|---|---|---|---|
| January | Excellent | 8.3 h | 8.0 | 7 min | 25°C | 8/30 |
| February | Excellent | 8.3 h | 8.0 | 7 min | 25°C | 6/30 |
| March | Good | 7.1 h | 6.6 | 8 min | 24°C | 9/30 |
| April | Too cold | 5.2 h | 4.9 | 11 min | 21°C | 11/30 |
| May | Too cold | 4.4 h | 3.9 | 14 min | 21°C | 5/30 |
| June | Too cold | 3.3 h | 3.2 | 17 min | 19°C | 10/30 |
| July | Too cold | 3.4 h | 3.4 | 16 min | 16°C | 9/30 |
| August | Too cold | 5.0 h | 4.5 | 12 min | 19°C | 8/30 |
| September | Too cold | 6.3 h | 6.0 | 9 min | 18°C | 11/30 |
| October | Too cold | 7.8 h | 7.5 | 7 min | 21°C | 11/30 |
| November | Too cold | 8.6 h | 8.3 | 6 min | 21°C | 15/30 |
| December | Excellent | 9.1 h | 8.7 | 6 min | 24°C | 7/30 |
Sun window is the number of hours a day with UV Index 2.5 or higher. Full dose is the minutes at midday for about 1,000 IU of vitamin D with a quarter of the body bare, for skin type III. Rainy days are days with at least 1 mm out of 30.
What to expect in Knysna
Lagoon town on the Garden Route with forests and oysters. Mild, dry summers in the south-west (December to March), summer rain on the east coast, and a cool Atlantic sea near Cape Town. Self-driving is easy but take normal security care in cities.
In Knysna afternoon highs average from 16°C in July to 25°C in February. The wettest month is November (about 15 rainy days out of 30) and the driest is May (5). Midday UV peaks at 8.7 in December, which is very strong, so protect your skin.
More about South Africa · South Africa in December · Best places in December
Questions about Knysna
When is the best time to visit Knysna for vitamin D?
The best months for vitamin D in Knysna are December to March, when a full dose takes about 6 minutes at midday.
What is the weather like in Knysna?
Afternoon highs average from 16°C in July to 25°C in February. The wettest month is November, with about 15 rainy days out of 30.
Which months should I avoid in Knysna?
For a beach stay, avoid the months when it is too cool from April to November.