Constantia Weather in September
Constantia in September sees moderate temperatures, with highs around 18°C (64°F) and overnight lows of 13°C (55°F). Around 55 mm (2.2 in) of rainfall is typical, so a light rain jacket is a sensible addition to your bag.
Rainfall in Constantia in September
Analyzing past climate data, one can expect approximately 11 days of rain, averaging 55 mm (2.2 in). Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.
Temperature in Constantia in September
September in Constantia sees highs of 18°C (64°F) and lows of 13°C (55°F) overnight. The difference between afternoon and evening temperatures is usually noticeable. With lows of 13°C (55°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.
Sunshine in Constantia in September
There are approximately 225 hours of sunshine this month, resulting in mostly clear days.
Wind Speed in Constantia in September
September has wind speeds averaging 5 m/s (10 knots). You can expect gentle to moderate winds that move small trees and make flags wave steadily on typical days. Conditions typically range from light breezes to moderate winds.
Average water temperature in September
The water temperature is 15°C (59°F) — chilly, but perfectly fine for a swim if you're not too sensitive to cold water. A short wetsuit can make longer sessions more comfortable.If you prefer enjoying temperate temperatures and rain-free days, January, February, March, April, November and December typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Africa, check out our Constantia's climate page.
Constantia Temperature in September
Min Temperature
13°C (55°F)
Max Temperature
18°C (64°F)
Water Temperature
15°C (59°F) *
Chance of Rain
36%
Precipitation
55 mm (2.2 in)
Rainy days
11 days
Humidity
77% *
Windspeed
5 m/s (10 knots) *
Sunshine
225 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Constantia typically stay consistent throughout September, with daily highs averaging around 18°C (64°F). Nights are cool, with lows around 10°C (50°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Constantia in September
Browse day-by-day weather records for Constantia spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Constantia historical weather extremes in September
The extremes listed below come from historical weather data collected in Constantia from 1976 through 2025.
- The warmest day in September was on September 12, 1997, with a maximum of 33°C (91°F).
- Constantia experienced its chilliest September day on September 20, 2013, reaching only 12°C (54°F).
- The lowest overnight temperature recorded in September was 2°C (36°F) (September 1, 1990).
Best Places in South Africa in September
Find out more about the weather in South Africa and which places have the best travel conditions in this month. See all of South Africa in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Constantia in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. The water temperature sits at about 15°C (59°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Constantia in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Africa, check out our Constantia's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Constantia climate overview or explore weather in South Africa.
