Today
Mon, Jun 22
Light drizzle
12°8°
- Rain chance
- 15%
- Precip
- 0.1 mm
- Max wind
- 18 km/h
Koster air quality
North West, South Africa · Johannesburg time · -25.86°, 26.90°
Current conditions · 2:45 AM local
Current conditions in Koster
8°C
Overcast
Feels like 6°C
- Humidity
- 100%
- Wind
- 13 km/h N
- Gusts
- 22 km/h
- UV index
- 0
- Visibility
- 0.6 km
Air quality
24
Good
US AQI · European AQI 16
Air quality in Koster is currently good, with a US AQI of 24 (European AQI 16). The dominant pollutant right now is ozone. Air quality is healthy; no precautions needed. Fine particulate matter (PM2.5) measures 5.5 µg/m³.
Pollutants
- PM2.5
- 5.5 µg/m³
- PM10
- 5.9 µg/m³
- Ozone (O₃)
- 39 µg/m³
- NO₂
- 4 µg/m³
- SO₂
- 4.4 µg/m³
- CO
- 127 µg/m³
- Dust
- 0 µg/m³
AQI computed from the CAMS air quality model via Open-Meteo. Bands follow the US EPA scale.
Right now
Right now in Koster, it's overcast with the temperature at 8 °C. It feels colder than it reads, more like 6 °C. Wind is from the N at 13 km/h. Humidity stands at 100% with sea-level pressure near 1027 hPa.
At a glance
Today
12° / 8°Light drizzle
Tomorrow
16° / 6°Overcast
Upcoming · to Sunday
20° / 7°A steady stretch: highs near 20°, lows around 7°, and no day above a 12% rain chance through Sunday.
Ad · 728×90
Next 3 days
Today brings light drizzle with a high of 12 °C and a low of 8 °C. Expect overcast tomorrow, between 6 °C and 16 °C. Wednesday looks like overcast; temperatures run from 8 °C up to 20 °C.
Tomorrow
Tue, Jun 23
Overcast
16°6°
- Rain chance
- 0%
- Precip
- 0 mm
- Max wind
- 17 km/h
Wednesday
Wed, Jun 24
Overcast
20°9°
- Rain chance
- 6%
- Precip
- 0 mm
- Max wind
- 10 km/h
Next 48 hours
- 12 AM9°15%14 km/h
- 1 AM8°7%14 km/h
- 2 AM8°2%13 km/h
- 3 AM8°0%13 km/h
- 4 AM8°0%12 km/h
- 5 AM8°0%11 km/h
- 6 AM8°0%11 km/h
- 7 AM8°0%10 km/h
- 8 AM8°0%12 km/h
- 9 AM9°0%12 km/h
- 10 AM10°0%14 km/h
- 11 AM11°0%16 km/h
- 12 PM12°0%17 km/h
- 1 PM12°0%18 km/h
- 2 PM12°0%18 km/h
- 3 PM12°0%16 km/h
- 4 PM12°0%17 km/h
- 5 PM11°0%17 km/h
- 6 PM10°0%14 km/h
- 7 PM9°0%13 km/h
- 8 PM9°0%12 km/h
- 9 PM8°0%10 km/h
- 10 PM8°0%8 km/h
- 11 PM8°0%8 km/h
- 12 AM7°0%7 km/h
- 1 AM7°0%6 km/h
- 2 AM7°0%7 km/h
- 3 AM7°0%9 km/h
- 4 AM7°0%9 km/h
- 5 AM7°0%10 km/h
- 6 AM6°0%10 km/h
- 7 AM6°0%11 km/h
- 8 AM7°0%11 km/h
- 9 AM9°0%12 km/h
- 10 AM11°0%14 km/h
- 11 AM13°0%15 km/h
- 12 PM14°0%16 km/h
- 1 PM16°0%16 km/h
- 2 PM16°0%17 km/h
- 3 PM16°0%16 km/h
- 4 PM15°0%16 km/h
- 5 PM13°0%13 km/h
- 6 PM11°0%7 km/h
- 7 PM10°0%6 km/h
- 8 PM9°0%6 km/h
- 9 PM9°0%6 km/h
- 10 PM9°0%6 km/h
- 11 PM9°0%8 km/h
In depth
The weather picture for Koster opens with overcast; it's 8 °C out, feeling like 6 °C. Today's forecast calls for light drizzle, topping out near 12 °C before falling back to 8 °C overnight. Winds blow mainly from the N around 18 km/h, with gusts up to 33 km/h. A warming trend takes daytime highs from 12 to 20 °C over the coming week. No meaningful rain shows up in the seven-day outlook, so dry conditions should dominate. Tomorrow brings overcast with a high of 16 °C and a 0% chance of precipitation. Sunrise comes at 06:58 and sunset at 17:29, giving 10.5 hours of daylight. Current humidity sits at 100% with pressure near 1027 hPa. Looking further out, Friday shows overcast with a high around 16 °C, while Sunday ends the week at 17 °C. Forecast details are refreshed throughout the day as new model runs arrive, so check back for the latest figures.
Sun & UV
- Sunrise
- 6:58 AM
- Sunset
- 5:29 PM
- Daylight
- 10h 31m
- Max UV
- 4.9 Moderate
Wind
- Wind
- 13 km/h
- Gusts
- 22 km/h
- Direction
- N (349°)
Farming weather
Soil temperatures today read surface 6.8 °C, 6 cm 8.3 °C, 18 cm 11.4 °C, 54 cm 12.5 °C. Soil moisture sits at 0-1 cm at 0.13 m³/m³, 3-9 cm at 0.13 m³/m³, 27-81 cm at 0.14 m³/m³. For wheat, the root-zone reading is below the ideal 0.2-0.35 m³/m³ band. Reference evapotranspiration totals 15 mm against only 0 mm of expected rain — a 15 mm deficit, so irrigation will be needed this week. A suitable spraying window opens around 07:00 on 2026-06-22, with winds at or below 15 km/h and no rain expected. Projected growing degree days over the next week: wheat 53, maize 15.
- Topsoil moisture
- 0.14 m³/m³
- Soil temp
- 9°C
- ET₀ today
- 1.3 mm
- Spray window
- ~5:00
- Rain (next 7d)
- 0.1 mm
- Wind
- 13 km/h
- Humidity
- 100%
Advisory summary
No weather alert thresholds are crossed for Koster in the current forecast (derived from forecast data, not official warnings). Conditions may still change — check back for updates.
Ad · 300×250
All data for Koster
| Variable | Value |
|---|---|
| City | Koster, North West, South Africa |
| Coordinates | -25.86301, 26.89756 |
| Elevation | 1620 m |
| Timezone | Africa/Johannesburg |
| Population | 23,361 |
| Observed at (local) | 2:45 AM |
| Temperature (2 m) | 8°C |
| Apparent temperature | 6°C |
| Relative humidity (2 m) | 100% |
| Dew point (2 m) | 9°C |
| Precipitation (last hour) | 0 mm |
| Rain | 0 mm |
| Showers | 0 mm |
| Snowfall | 0 cm |
| Weather code (WMO) | 3 |
| Cloud cover | 100% |
| Surface pressure | 847 hPa |
| Sea-level pressure | 1027 hPa |
| Wind speed (10 m) | 13 km/h |
| Wind gusts (10 m) | 22 km/h |
| Wind direction (10 m) | 349° (N) |
| Visibility | 0.6 km |
| UV index | 0 |
| Day / night | Night |
| Today max / min | 12°C / 8°C |
| Today feels-like max / min | 9°C / 5°C |
| Today precipitation sum | 0.1 mm |
| Today rain sum | 0 mm |
| Today snowfall sum | 0 cm |
| Today max precip probability | 15% |
| Today max wind / gusts | 18 km/h / 33 km/h |
| Dominant wind direction | 358° (N) |
| Sunrise / sunset | 6:58 AM / 5:29 PM |
| Daylight duration | 10h 31m |
| Sunshine duration | 7h 51m |
| Max UV index | 4.9 |
| Reference evapotranspiration (ET₀) | 1.3 mm |
| Topsoil moisture (0–1 cm) | 0.14 m³/m³ |
| Surface soil temperature | 9°C |
| US AQI | 24 |
| European AQI | 16 |
| PM2.5 | 5.5 µg/m³ |
| PM10 | 5.9 µg/m³ |
| Ozone (O₃) | 39 µg/m³ |
| Nitrogen dioxide (NO₂) | 4 µg/m³ |
| Sulphur dioxide (SO₂) | 4.4 µg/m³ |
| Carbon monoxide (CO) | 127 µg/m³ |
| Dust | 0 µg/m³ |
Weather widget
Preview widget →Add live Koster weather to your own site — paste this snippet anywhere HTML is allowed. It stays in sync automatically.
<iframe src="https://weathertomorrow.cloud/embed/city/za/north-west/koster" width="320" height="180" frameborder="0" title="Koster weather" loading="lazy"></iframe>Frequently asked questions
Will it rain in Koster tomorrow?
Rain is unlikely in Koster tomorrow; the precipitation chance stays around 0%.
What is the temperature in Koster today?
Today Koster sees light drizzle with a high of 12 °C and a low of 8 °C.
How hot will it be in Koster tomorrow?
Tomorrow's high in Koster is forecast at 16 °C with overcast.
Is it windy in Koster today?
No, not especially; gusts only reach up to 33 km/h today.
What is the UV index in Koster today?
The UV index peaks at 5 today, which is moderate.
What time is sunrise and sunset in Koster today?
The sun rises at 06:58 and sets at 17:29 local time.
Is the air quality in Koster good today?
Air quality is good right now, with a US AQI reading of 24.