Koster weather in January
In January, Koster sees average daytime highs of 28°C and overnight lows near 18°C, with 98 mm of rain across 14.4 wet days and about 13.4 hours of daylight. It is the 1st-warmest and 2nd-wettest month of the year here.
Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 38% of the time in January, and the air most often feels humid.
Daylight stretches from about 13 h 36 min at the start of January to 13 h 12 min by month's end. Set against the rest of the year, January is Koster's 11th-clearest and 7th-windiest month. For the whole year in context, see Koster's year-round climate.
- Daytime high
- 28°
- 1st warmest
- Overnight low
- 18°
- 12th coldest
- Rainfall
- 98 mm
- 14.4 wet days
- Daylight
- 13 h 30 min
- 5:38 AM – 7:05 PM
- Cloud cover
- 52%
- 11th clearest
- Wind
- 9 km/h
- 7th windiest
- Solar energy
- 6.65 kWh/m²
- Travel score
- 5.5
- out of 10
Koster is place in North West, South Africa.
- Founded
- 1860
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in January
Day-to-day highs hold fairly steady near 28°C through the month.
A typical January day in Koster reaches about 28°C in the afternoon and slips back to 18°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 32°C. Set against its neighbours, January runs on par with December and on par with February.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| Avg low (°C) | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 28 | 18 |
| 2 | 28 | 18 |
| 3 | 28 | 18 |
| 4 | 28 | 18 |
| 5 | 28 | 18 |
| 6 | 28 | 18 |
| 7 | 28 | 18 |
| 8 | 28 | 18 |
| 9 | 28 | 18 |
| 10 | 28 | 18 |
| 11 | 28 | 18 |
| 12 | 28 | 18 |
| 13 | 28 | 18 |
| 14 | 28 | 18 |
| 15 | 28 | 18 |
| 16 | 28 | 18 |
| 17 | 28 | 18 |
| 18 | 28 | 18 |
| 19 | 28 | 18 |
| 20 | 28 | 18 |
| 21 | 28 | 18 |
| 22 | 28 | 18 |
| 23 | 28 | 18 |
| 24 | 28 | 18 |
| 25 | 28 | 18 |
| 26 | 28 | 18 |
| 27 | 28 | 18 |
| 28 | 28 | 18 |
| 29 | 28 | 18 |
| 30 | 28 | 18 |
| 31 | 28 | 18 |
Koster weather by month
How January compares with the rest of the year at a glance. January is the 1st-warmest and 2nd-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 28° / 18° | 98 | 14.4 | 13.4 | 5.5 |
| Feb | 28° / 18° | 96 | 12.3 | 12.9 | 5.9 |
| Mar | 27° / 16° | 76 | 11.1 | 12.2 | 6.7 |
| Apr | 24° / 13° | 36 | 6.5 | 11.4 | 7.8 |
| May | 22° / 9° | 18 | 2.2 | 10.8 | 8.7 |
| Jun | 20° / 6° | 8 | 1.2 | 10.4 | 8.4 |
| Jul | 20° / 5° | 3 | 0.5 | 10.5 | 8.5 |
| Aug | 23° / 8° | 8 | 1.4 | 11.1 | 9.0 |
| Sep | 26° / 12° | 14 | 2.2 | 11.8 | 8.5 |
| Oct | 28° / 15° | 52 | 7.8 | 12.6 | 7.0 |
| Nov | 28° / 16° | 78 | 12.1 | 13.3 | 5.9 |
| Dec | 28° / 17° | 121 | 14.8 | 13.6 | 5.5 |
Cloud cover in January
The sky is clear or mostly clear about 38% of the time in January.
Beyond those clear spells, partly cloudy skies cover about 24% of January, with mostly cloudy or overcast conditions the remaining 37%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 61 | 61 | 61 | 61 | 62 | 62 | 62 | 62 | 63 | 63 | 62 | 63 | 63 | 62 | 63 | 63 | 63 | 62 | 62 | 63 | 63 | 64 | 63 | 63 | 64 | 64 | 64 | 65 | 65 | 65 | 65 |
| Cloudier (%) | 39 | 39 | 39 | 39 | 38 | 38 | 38 | 38 | 37 | 37 | 38 | 37 | 37 | 38 | 37 | 37 | 37 | 38 | 38 | 37 | 37 | 36 | 37 | 37 | 36 | 36 | 36 | 35 | 35 | 35 | 35 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 61 | 39 |
| 2 | 61 | 39 |
| 3 | 61 | 39 |
| 4 | 61 | 39 |
| 5 | 62 | 38 |
| 6 | 62 | 38 |
| 7 | 62 | 38 |
| 8 | 62 | 38 |
| 9 | 63 | 37 |
| 10 | 63 | 37 |
| 11 | 62 | 38 |
| 12 | 63 | 37 |
| 13 | 63 | 37 |
| 14 | 62 | 38 |
| 15 | 63 | 37 |
| 16 | 63 | 37 |
| 17 | 63 | 37 |
| 18 | 62 | 38 |
| 19 | 62 | 38 |
| 20 | 63 | 37 |
| 21 | 63 | 37 |
| 22 | 64 | 36 |
| 23 | 63 | 37 |
| 24 | 63 | 37 |
| 25 | 64 | 36 |
| 26 | 64 | 36 |
| 27 | 64 | 36 |
| 28 | 65 | 35 |
| 29 | 65 | 35 |
| 30 | 65 | 35 |
| 31 | 65 | 35 |
Chance of precipitation in January
Koster gets around 98 mm of rain over 14.4 wet days in January. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 47% and peaks near 49% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 45 | 44 | 44 | 44 | 44 | 44 | 44 | 45 | 45 | 45 | 46 | 46 | 47 | 47 | 48 | 48 | 48 | 48 | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 48 | 48 | 48 |
| Rain chance (%) | |
|---|---|
| 1 | 45 |
| 2 | 44 |
| 3 | 44 |
| 4 | 44 |
| 5 | 44 |
| 6 | 44 |
| 7 | 44 |
| 8 | 45 |
| 9 | 45 |
| 10 | 45 |
| 11 | 46 |
| 12 | 46 |
| 13 | 47 |
| 14 | 47 |
| 15 | 48 |
| 16 | 48 |
| 17 | 48 |
| 18 | 48 |
| 19 | 49 |
| 20 | 49 |
| 21 | 49 |
| 22 | 49 |
| 23 | 49 |
| 24 | 49 |
| 25 | 49 |
| 26 | 49 |
| 27 | 49 |
| 28 | 49 |
| 29 | 48 |
| 30 | 48 |
| 31 | 48 |
Humidity in January
Most of January feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, January lands in the humid band about 47% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 13 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 11 |
| Comfortable (%) | 36 | 36 | 36 | 36 | 36 | 37 | 37 | 37 | 38 | 37 | 37 | 37 | 36 | 35 | 35 | 34 | 34 | 33 | 33 | 33 | 34 | 34 | 34 | 34 | 35 | 35 | 35 | 36 | 36 | 37 | 38 |
| Humid (%) | 43 | 42 | 42 | 42 | 42 | 41 | 41 | 42 | 42 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 51 | 51 | 51 | 51 | 52 | 51 | 51 | 51 | 50 | 49 | 48 | 48 |
| Muggy (%) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 17 | 36 | 43 | 5 |
| 2 | 17 | 36 | 42 | 5 |
| 3 | 17 | 36 | 42 | 5 |
| 4 | 17 | 36 | 42 | 5 |
| 5 | 17 | 36 | 42 | 5 |
| 6 | 17 | 37 | 41 | 5 |
| 7 | 16 | 37 | 41 | 5 |
| 8 | 16 | 37 | 42 | 5 |
| 9 | 16 | 38 | 42 | 5 |
| 10 | 16 | 37 | 42 | 5 |
| 11 | 15 | 37 | 43 | 5 |
| 12 | 15 | 37 | 44 | 4 |
| 13 | 15 | 36 | 45 | 4 |
| 14 | 15 | 35 | 46 | 4 |
| 15 | 14 | 35 | 47 | 4 |
| 16 | 14 | 34 | 48 | 4 |
| 17 | 13 | 34 | 49 | 4 |
| 18 | 13 | 33 | 50 | 4 |
| 19 | 12 | 33 | 51 | 4 |
| 20 | 12 | 33 | 51 | 4 |
| 21 | 11 | 34 | 51 | 4 |
| 22 | 11 | 34 | 51 | 4 |
| 23 | 11 | 34 | 51 | 4 |
| 24 | 10 | 34 | 52 | 4 |
| 25 | 10 | 35 | 51 | 4 |
| 26 | 10 | 35 | 51 | 4 |
| 27 | 10 | 35 | 51 | 4 |
| 28 | 10 | 36 | 50 | 4 |
| 29 | 10 | 36 | 49 | 4 |
| 30 | 11 | 37 | 48 | 4 |
| 31 | 11 | 38 | 48 | 4 |
Wind in January
Winds average 9 km/h in January.
Across January, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 9 | calm |
| 2 | 9 | calm |
| 3 | 9 | calm |
| 4 | 9 | calm |
| 5 | 9 | calm |
| 6 | 9 | calm |
| 7 | 9 | calm |
| 8 | 9 | calm |
| 9 | 9 | calm |
| 10 | 9 | calm |
| 11 | 9 | calm |
| 12 | 9 | calm |
| 13 | 9 | calm |
| 14 | 9 | calm |
| 15 | 9 | calm |
| 16 | 9 | calm |
| 17 | 9 | calm |
| 18 | 9 | calm |
| 19 | 9 | calm |
| 20 | 9 | calm |
| 21 | 9 | calm |
| 22 | 9 | calm |
| 23 | 8 | calm |
| 24 | 8 | calm |
| 25 | 8 | calm |
| 26 | 8 | calm |
| 27 | 8 | calm |
| 28 | 8 | calm |
| 29 | 8 | calm |
| 30 | 8 | calm |
| 31 | 8 | calm |
Sunrise & sunset in January
Daylight runs from about 13 h 36 min at the start of January to 13 h 12 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 24 minutes over January. Sunrise moves from 5:28 AM to 5:49 AM, and sunset from 7:03 PM to 7:02 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.2 | 13.2 |
| Sunrise (AM) | 5:28 | 5:28 | 5:29 | 5:30 | 5:30 | 5:31 | 5:32 | 5:32 | 5:33 | 5:34 | 5:35 | 5:35 | 5:36 | 5:37 | 5:37 | 5:38 | 5:39 | 5:40 | 5:40 | 5:41 | 5:42 | 5:43 | 5:43 | 5:44 | 5:45 | 5:46 | 5:46 | 5:47 | 5:48 | 5:49 | 5:49 |
| Sunset (PM) | 7:03 | 7:04 | 7:04 | 7:04 | 7:04 | 7:04 | 7:05 | 7:05 | 7:05 | 7:05 | 7:05 | 7:05 | 7:05 | 7:05 | 7:05 | 7:05 | 7:05 | 7:05 | 7:05 | 7:05 | 7:05 | 7:05 | 7:04 | 7:04 | 7:04 | 7:04 | 7:04 | 7:03 | 7:03 | 7:03 | 7:02 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.6 | 5:28 | 7:03 |
| 2 | 13.6 | 5:28 | 7:04 |
| 3 | 13.6 | 5:29 | 7:04 |
| 4 | 13.6 | 5:30 | 7:04 |
| 5 | 13.6 | 5:30 | 7:04 |
| 6 | 13.6 | 5:31 | 7:04 |
| 7 | 13.5 | 5:32 | 7:05 |
| 8 | 13.5 | 5:32 | 7:05 |
| 9 | 13.5 | 5:33 | 7:05 |
| 10 | 13.5 | 5:34 | 7:05 |
| 11 | 13.5 | 5:35 | 7:05 |
| 12 | 13.5 | 5:35 | 7:05 |
| 13 | 13.5 | 5:36 | 7:05 |
| 14 | 13.5 | 5:37 | 7:05 |
| 15 | 13.5 | 5:37 | 7:05 |
| 16 | 13.5 | 5:38 | 7:05 |
| 17 | 13.4 | 5:39 | 7:05 |
| 18 | 13.4 | 5:40 | 7:05 |
| 19 | 13.4 | 5:40 | 7:05 |
| 20 | 13.4 | 5:41 | 7:05 |
| 21 | 13.4 | 5:42 | 7:05 |
| 22 | 13.4 | 5:43 | 7:05 |
| 23 | 13.4 | 5:43 | 7:04 |
| 24 | 13.3 | 5:44 | 7:04 |
| 25 | 13.3 | 5:45 | 7:04 |
| 26 | 13.3 | 5:46 | 7:04 |
| 27 | 13.3 | 5:46 | 7:04 |
| 28 | 13.3 | 5:47 | 7:03 |
| 29 | 13.3 | 5:48 | 7:03 |
| 30 | 13.2 | 5:49 | 7:03 |
| 31 | 13.2 | 5:49 | 7:02 |
Solar energy in January
Average shortwave solar energy reaching the ground each day in January, about 6.65 kWh/m².
For context, solar energy here swings from a low near 3.91 kWh/m² to a high of 6.8 kWh/m² in December across the year — January's 6.65 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.7 | 6.7 | 6.7 | 6.7 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.8 | Intense |
| 2 | 6.8 | Intense |
| 3 | 6.8 | Intense |
| 4 | 6.8 | Intense |
| 5 | 6.8 | Intense |
| 6 | 6.8 | Intense |
| 7 | 6.8 | Intense |
| 8 | 6.8 | Intense |
| 9 | 6.8 | Intense |
| 10 | 6.8 | Intense |
| 11 | 6.7 | Intense |
| 12 | 6.7 | Intense |
| 13 | 6.7 | Intense |
| 14 | 6.7 | Intense |
| 15 | 6.6 | Intense |
| 16 | 6.6 | Intense |
| 17 | 6.6 | Intense |
| 18 | 6.6 | Intense |
| 19 | 6.6 | Intense |
| 20 | 6.5 | Intense |
| 21 | 6.5 | Intense |
| 22 | 6.5 | Intense |
| 23 | 6.5 | Intense |
| 24 | 6.5 | Intense |
| 25 | 6.5 | Intense |
| 26 | 6.5 | Intense |
| 27 | 6.5 | Intense |
| 28 | 6.5 | Intense |
| 29 | 6.5 | Intense |
| 30 | 6.5 | Intense |
| 31 | 6.5 | Intense |
Hazard calendar for Koster
In January, Koster sits inside its rainy season season. The full year is below, with each hazard's peak months called out.
Koster's rainy season runs November–March, when most of the year's rain falls.
Is January a good time to visit Koster?
Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
January is a reasonable time to visit Koster for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Koster in January
From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In January, Koster sees daytime highs around 28°C and nights near 18°C. Pack light clothes, rain gear and sun protection. About 14 days see rain.
UV index in Koster in January
Clear-sky midday UV in January peaks around 15 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Koster peaks around January 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 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) | 15 | 13 | 12 | 9 | 6 | 5 | 6 | 8 | 9 | 11 | 12 | 14 |
| Level | Extreme | Extreme | Extreme | Very high | High | High | High | Very high | Very high | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 13 | Extreme |
| Mar | 12 | Extreme |
| Apr | 9 | Very high |
| May | 6 | High |
| Jun | 5 | High |
| Jul | 6 | High |
| Aug | 8 | Very high |
| Sep | 9 | Very high |
| Oct | 11 | Extreme |
| Nov | 12 | Extreme |
| Dec | 14 | Extreme |
Air quality in Koster in January
Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.
Air quality in Koster is worst in June — around 69 µg/m³ PM2.5 (unhealthy), about 5.0× the cleanest month (December, 14 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) | 15 | 22 | 31 | 46 | 62 | 69 | 66 | 53 | 47 | 28 | 17 | 14 |
| Level | Moderate | Moderate | Moderate | Poor | Unhealthy | Unhealthy | Unhealthy | Poor | Poor | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 15 | Moderate |
| Feb | 22 | Moderate |
| Mar | 31 | Moderate |
| Apr | 46 | Poor |
| May | 62 | Unhealthy |
| Jun | 69 | Unhealthy |
| Jul | 66 | Unhealthy |
| Aug | 53 | Poor |
| Sep | 47 | Poor |
| Oct | 28 | Moderate |
| Nov | 17 | Moderate |
| Dec | 14 | Moderate |
Where is Koster?
Koster sits at 25.9°S, 26.9°E, 1,620 m above sea level, in South Africa. The nearest listed city is Rustenburg, 41 km away.
Topography around Koster
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Koster.
Within 3 km, the terrain around Koster has only modest variations in elevation — a maximum elevation change of 168 m around an average of 1,581 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 397 m; within 80 km, large variations in elevation — a maximum elevation change of 868 m.
The land around Koster is covered by grassland (50%) and cropland (31%) within 3 km, grassland (54%) and cropland (26%) within 16 km, and grassland (58%) 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 Koster (-25.863°, 26.8976°, elevation 1,620 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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).