Siyabuswa in Summer
In summer (December, January and February), Siyabuswa sees average daytime highs around 31°C and overnight lows near 20°C, with 246 mm of rain over about 35 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 31°C. The sky is clear or mostly clear about 41% of the time across summer, and the air most often feels humid.
Summer is Siyabuswa's weakest season of the year to visit on our travel score. For the whole year in context, see Siyabuswa's year-round climate.
- Avg daytime high
- 31°C
- warmest season of the year
- Avg overnight low
- 20°C
- Rainfall
- 246 mm
- 35 wet days
- Avg wind
- 8 km/h
- Travel score
- 4.4
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Siyabuswa in Summer
Across summer, daytime highs hold fairly steady around 31°C.
A typical summer day in Siyabuswa reaches about 31°C and drops to 20°C overnight. The warmest of the three months is January, the coolest December.
Siyabuswa 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 | 31° / 20° | 91 | 12.4 | 13.4 | 4.3 |
| Feb | 31° / 20° | 66 | 9.2 | 12.9 | 4.6 |
| Mar | 30° / 19° | 61 | 8.3 | 12.2 | 5.6 |
| Apr | 28° / 15° | 32 | 4.7 | 11.4 | 7.5 |
| May | 25° / 11° | 13 | 2.2 | 10.8 | 8.9 |
| Jun | 23° / 7° | 4 | 0.8 | 10.5 | 9.2 |
| Jul | 23° / 7° | 3 | 0.5 | 10.6 | 9.2 |
| Aug | 26° / 10° | 4 | 1 | 11.1 | 9.1 |
| Sep | 29° / 14° | 12 | 2 | 11.8 | 7.0 |
| Oct | 30° / 17° | 47 | 7.2 | 12.6 | 5.5 |
| Nov | 30° / 18° | 82 | 11.2 | 13.2 | 4.8 |
| Dec | 31° / 20° | 89 | 13.2 | 13.5 | 4.4 |
Cloud cover in Summer
The sky is clear or mostly clear about 41% of the time across summer.
Chance of precipitation in Summer
Siyabuswa gets around 246 mm of rain over 35 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 8 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 24 min in early December to 12 h 36 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 6.6 kWh/m².
Hazard calendar for Siyabuswa
In summer, Siyabuswa overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Siyabuswa's rainy season runs October–March, when most of the year's rain falls.
Is summer a good time to visit Siyabuswa?
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 a reasonable time to visit Siyabuswa for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Siyabuswa in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Siyabuswa sees daytime highs around 31°C and nights near 20°C. Pack light clothes and sun protection. Worth having: rain gear. About 35 days see rain.
UV index in Siyabuswa in Summer
Clear-sky midday UV across summer averages around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Siyabuswa peaks around January 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 17 at about 5 (high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 14 | 13 | 12 | 8 | 6 | 5 | 6 | 7 | 9 | 10 | 11 | 14 |
| Level | Extreme | Extreme | Extreme | Very high | High | High | High | Very high | Very high | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 13 | Extreme |
| Mar | 12 | Extreme |
| Apr | 8 | Very high |
| May | 6 | High |
| Jun | 5 | High |
| Jul | 6 | High |
| Aug | 7 | Very high |
| Sep | 9 | Very high |
| Oct | 10 | Extreme |
| Nov | 11 | Extreme |
| Dec | 14 | Extreme |
Air quality in Siyabuswa 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 Siyabuswa is worst in July — around 48 µg/m³ PM2.5 (poor), about 4.8× the cleanest month (December, 10 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) | 10 | 13 | 17 | 27 | 40 | 45 | 48 | 43 | 34 | 20 | 13 | 10 |
| Level | Good | Moderate | Moderate | Moderate | Poor | Poor | Poor | Poor | Moderate | Moderate | Moderate | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 10 | Good |
| Feb | 13 | Moderate |
| Mar | 17 | Moderate |
| Apr | 27 | Moderate |
| May | 40 | Poor |
| Jun | 45 | Poor |
| Jul | 48 | Poor |
| Aug | 43 | Poor |
| Sep | 34 | Moderate |
| Oct | 20 | Moderate |
| Nov | 13 | Moderate |
| Dec | 10 | Good |
Where is Siyabuswa?
Siyabuswa sits at 25.1°S, 29.0°E, 935 m above sea level, in South Africa. The nearest listed city is Vaalbank, 20 km away.
Topography around Siyabuswa
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Siyabuswa.
Within 3 km, the terrain around Siyabuswa has only modest variations in elevation — a maximum elevation change of 84 m around an average of 925 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 457 m; within 80 km, large variations in elevation — a maximum elevation change of 1,139 m.
The land around Siyabuswa is covered by artificial surfaces (39%), shrubs (30%) and grassland (20%) within 3 km, shrubs (46%) and grassland (25%) within 16 km, and grassland (41%) and shrubs (32%) 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 Siyabuswa (-25.1132°, 29.0445°, elevation 935 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.