Knysna records about 798mm of rain across roughly 82 wet days a year, which is a 22% chance on an average day. November is the wettest month at 72mm (9% of the annual total) and June the driest at 28mm. Local rain type: steady rain. Knysna on the Garden Route gets year-round rain — the indigenous forests depend on it. Summer is warmer but not significantly drier.
Chance of rain on an average day: 22%
Rainfall climatology for Knysna. The live hour-by-hour answer for today loads at the top of this page from Open-Meteo and refreshes through the day — the figures below describe a typical year, not today.
Last updated: · Live forecast data refreshes hourly.
| Annual rainfall | 798mm |
| Rain days per year | 82 |
| Odds on an average day | 22% |
| Wettest month | November — 72mm over 10 days |
| Driest month | June — 28mm over 4 days |
| Rain type | steady rain |
| Best dry window | February through April offers the warmest conditions. |
| Worst rain window | May through August brings cooler, wetter winter weather. |
November delivers 157% more rain than June (72mm vs 28mm). That gap is the difference between planning around showers and ignoring them.
No single month holds more than 9% of the annual total, so rain in Knysna is spread through the year — there is no season you can rely on being dry.
Knysna rain typically comes as discrete showers, so a compact umbrella and a flexible plan are usually enough.
Rain falls on about 10 days in November against 4 in June — the frequency swing matters more for planning than the millimetre totals.
Climate normals. Use them to judge whether today's live forecast at the top of the page is typical or unusual for the season.
| Month | Rainfall | Rain days | Chance on a given day | Highs |
|---|---|---|---|---|
| January | 52mm | 7 | 23% | 25°C |
| February | 48mm | 7 | 23% | 25°C |
| March | 55mm | 8 | 27% | 24°C |
| April | 58mm | 8 | 27% | 22°C |
| May | 42mm | 6 | 20% | 21°C |
| June | 28mm | 4 | 13% | 19°C |
| July | 28mm | 4 | 13% | 18°C |
| August | 38mm | 5 | 17% | 18°C |
| September | 42mm | 6 | 20% | 19°C |
| October | 62mm | 9 | 30% | 21°C |
| November | 72mm | 10 | 33% | 22°C |
| December | 68mm | 9 | 30% | 24°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Knysna we combine the hourly probability curve, expected volume in millimetres, and the city's own rainfall record into a single umbrella verdict.
| Factor | Weight | What it measures |
|---|---|---|
| Hourly probability | 40% | Peak and sustained chance of measurable rain across the next 24 hours. |
| Expected volume | 30% | Total millimetres, which separates a passing shower from a genuine soaking. |
| Timing & duration | 20% | When rain starts, when it eases, and the longest continuous dry window. |
| Local rain type | 10% | Drizzle, brief showers, thunderstorms or monsoon — each needs different gear. |
Live hourly values come from Open-Meteo and refresh through the day. Monthly rainfall figures are climate normals, so they describe a typical year rather than a forecast.
Knysna records rain on roughly 82 days a year — about a 22% chance on any given day — totalling around 798mm.
November, with about 72mm over 10 rain days. That is 9% of the entire year's rainfall in a single month.
June is the driest month at 28mm across roughly 4 days. February through April offers the warmest conditions.
Knysna on the Garden Route gets year-round rain — the indigenous forests depend on it. Summer is warmer but not significantly drier.
No. Probability is the chance that at least 0.2mm of rain falls at your location at some point in the period. Check the expected millimetres alongside it: 40% with 0.4mm is a passing shower, 40% with 12mm is a soaking.