Riversdale in Summer
In summer (December, January and February), Riversdale sees average daytime highs around 28°C and overnight lows near 17°C, with 78 mm of rain over about 16 wet days across the season. It is the warmest season of the year and the driest season of the year.
Across summer, daytime highs hold fairly steady around 28°C. The sky is clear or mostly clear about 54% of the time across summer, and the air most often feels comfortable.
Summer is Riversdale's 3rd-best season to visit on our travel score. For the whole year in context, see Riversdale's year-round climate.
- Avg daytime high
- 28°C
- warmest season of the year
- Avg overnight low
- 17°C
- Rainfall
- 78 mm
- 16 wet days
- Avg wind
- 11 km/h
- Travel score
- 7.3
- 3rd-best season
- Months
- Dec · Jan · Feb
Temperature in Riversdale in Summer
Across summer, daytime highs hold fairly steady around 28°C.
A typical summer day in Riversdale reaches about 28°C and drops to 17°C overnight. The warmest of the three months is February, the coolest December.
Riversdale weather by month
How the three summer months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 28° / 17° | 27 | 5.3 | 14 | 7.4 |
| Feb | 28° / 17° | 23 | 5.3 | 13.3 | 7.1 |
| Mar | 27° / 16° | 37 | 6.4 | 12.3 | 7.4 |
| Apr | 24° / 13° | 35 | 5.9 | 11.2 | 7.7 |
| May | 22° / 10° | 28 | 5.2 | 10.3 | 7.6 |
| Jun | 19° / 7° | 26 | 5.4 | 9.8 | 7.2 |
| Jul | 19° / 7° | 27 | 5.6 | 10 | 7.1 |
| Aug | 20° / 8° | 30 | 5.8 | 10.7 | 7.2 |
| Sep | 21° / 10° | 23 | 5 | 11.8 | 7.5 |
| Oct | 24° / 12° | 38 | 5.8 | 12.9 | 7.7 |
| Nov | 25° / 14° | 43 | 6.1 | 13.8 | 7.7 |
| Dec | 27° / 16° | 28 | 5.3 | 14.2 | 7.5 |
Cloud cover in Summer
The sky is clear or mostly clear about 54% of the time across summer.
Chance of precipitation in Summer
Riversdale gets around 78 mm of rain over 16 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 11 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 06 min in early December to 12 h 48 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 7.0 kWh/m².
Is summer a good time to visit Riversdale?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is one of the better times to visit Riversdale for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Riversdale in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Riversdale sees daytime highs around 28°C and nights near 17°C. Pack light clothes and sun protection. About 16 days see rain.
Sea temperature near Riversdale in Summer
The nearest coast averages about 21°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 33 km away) is warmest in February at about 22°C and coldest in July near 15°C.
It's comfortable for a long swim from Dec 13 to Mar 25 — about 3.4 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 21 | 22 | 21 | 19 | 17 | 16 | 15 | 16 | 16 | 17 | 19 | 20 |
| Comfort | Refreshing | Refreshing | Refreshing | Cool | Cool | Cool | Cool | Cool | Cool | Cool | Cool | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 21 | Refreshing |
| Feb | 22 | Refreshing |
| Mar | 21 | Refreshing |
| Apr | 19 | Cool |
| May | 17 | Cool |
| Jun | 16 | Cool |
| Jul | 15 | Cool |
| Aug | 16 | Cool |
| Sep | 16 | Cool |
| Oct | 17 | Cool |
| Nov | 19 | Cool |
| Dec | 20 | Refreshing |
UV index in Riversdale in Summer
Clear-sky midday UV across summer averages around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Riversdale peaks around January 14 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 13 | 10 | 10 | 6 | 4 | 3 | 3 | 4 | 6 | 10 | 12 | 12 |
| Level | Extreme | Very high | Very high | High | Moderate | Moderate | Moderate | Moderate | High | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 10 | Very high |
| Mar | 10 | Very high |
| Apr | 6 | High |
| May | 4 | Moderate |
| Jun | 3 | Moderate |
| Jul | 3 | Moderate |
| Aug | 4 | Moderate |
| Sep | 6 | High |
| Oct | 10 | Extreme |
| Nov | 12 | Extreme |
| Dec | 12 | Extreme |
Where is Riversdale?
Riversdale sits at 34.1°S, 21.3°E, 121 m above sea level, in South Africa. The nearest listed city is Swellendam, 76 km away.
Topography around Riversdale
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Riversdale.
Within 3 km, the terrain around Riversdale has only modest variations in elevation — a maximum elevation change of 160 m around an average of 142 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,339 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,273 m.
The land around Riversdale is covered by cropland (39%) and shrubs (24%) within 3 km, cropland (40%), shrubs (26%) and grassland (24%) within 16 km, and shrubs (32%), grassland (28%) and water (23%) within 80 km.
South Africa travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / M / N
- 230 V · 50 Hz
- Prices
- ≈ 41% of US
- price level, 2025
- GDP per capita
- $6,598
- 2025
- Happiness
- 5.0 / 10
- World Happiness, 2025
- Safe drinking water
- 68%
- of population, 2024
- Homicide rate
- 43.7
- per 100k, 2022
- Road deaths
- 22.2
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Very high
- EF EPI 602
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Riversdale (-34.0934°, 21.2572°, elevation 121 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.