Robertson in Summer
In summer (December, January and February), Robertson sees average daytime highs around 28°C and overnight lows near 15°C, with 75 mm of rain over about 14 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 65% of the time across summer, and the air most often feels dry.
Summer is Robertson's 3rd-best season to visit on our travel score. For the whole year in context, see Robertson's year-round climate.
- Avg daytime high
- 28°C
- warmest season of the year
- Avg overnight low
- 15°C
- Rainfall
- 75 mm
- 14 wet days
- Avg wind
- 10 km/h
- Travel score
- 7.0
- 3rd-best season
- Months
- Dec · Jan · Feb
Temperature in Robertson in Summer
Across summer, daytime highs hold fairly steady around 28°C.
A typical summer day in Robertson reaches about 28°C and drops to 15°C overnight. The warmest of the three months is January, the coolest December.
Robertson 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 | 29° / 15° | 26 | 5 | 14 | 6.8 |
| Feb | 29° / 16° | 24 | 4.5 | 13.3 | 6.8 |
| Mar | 27° / 14° | 34 | 6 | 12.3 | 7.5 |
| Apr | 24° / 11° | 32 | 5.5 | 11.2 | 7.9 |
| May | 21° / 8° | 28 | 5 | 10.3 | 7.4 |
| Jun | 17° / 6° | 33 | 6.6 | 9.8 | 6.3 |
| Jul | 17° / 5° | 35 | 6 | 10 | 6.1 |
| Aug | 18° / 6° | 34 | 6.5 | 10.7 | 6.5 |
| Sep | 20° / 8° | 23 | 5.6 | 11.8 | 7.2 |
| Oct | 23° / 10° | 37 | 5.6 | 12.9 | 7.8 |
| Nov | 25° / 12° | 38 | 5.5 | 13.8 | 7.9 |
| Dec | 28° / 14° | 25 | 4.9 | 14.2 | 7.5 |
Cloud cover in Summer
The sky is clear or mostly clear about 65% of the time across summer.
Chance of precipitation in Summer
Robertson gets around 75 mm of rain over 14 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 10 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 7.6 kWh/m².
Is summer a good time to visit Robertson?
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 Robertson for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Robertson in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Robertson sees daytime highs around 28°C and nights near 15°C. Pack light clothes and sun protection. About 14 days see rain.
UV index in Robertson 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 Robertson peaks around January 13 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 |
Air quality in Robertson in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Robertson is worst in June — around 17 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (January, 6 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 6 | 8 | 9 | 10 | 16 | 17 | 17 | 16 | 13 | 9 | 7 | 8 |
| Level | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 6 | Good |
| Feb | 8 | Good |
| Mar | 9 | Good |
| Apr | 10 | Good |
| May | 16 | Moderate |
| Jun | 17 | Moderate |
| Jul | 17 | Moderate |
| Aug | 16 | Moderate |
| Sep | 13 | Moderate |
| Oct | 9 | Good |
| Nov | 7 | Good |
| Dec | 8 | Good |
Where is Robertson?
Robertson sits at 33.8°S, 19.9°E, 187 m above sea level, in South Africa. The nearest listed city is Ashton, 16 km away.
Topography around Robertson
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Robertson.
Within 3 km, the terrain around Robertson has significant variations in elevation — a maximum elevation change of 273 m around an average of 209 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,558 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,214 m.
The land around Robertson is covered by shrubs (42%) and cropland (21%) within 3 km, shrubs (54%) and grassland (26%) within 16 km, and grassland (44%), shrubs (30%) and cropland (21%) 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 Robertson (-33.8034°, 19.8854°, elevation 187 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.