Koster weather in July

In July, Koster sees average daytime highs of 20°C and overnight lows near 5°C, with 3 mm of rain across 0.5 wet days and about 10.5 hours of daylight. It is the 12th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 20°C through the month. The sky is clear or mostly clear about 88% of the time in July, and the air most often feels dry.

Daylight stretches from about 10 h 24 min at the start of July to 10 h 48 min by month's end. Set against the rest of the year, July is Koster's 1st-clearest and 6th-windiest month. For the whole year in context, see Koster's year-round climate.

Daytime high: 20°; 12th warmest
Overnight low: 5°; 1st coldest
Rainfall: 3 mm; 0.5 wet days
Daylight: 10 h 30 min; 7:02 AM – 5:34 PM
Cloud cover: 12%; 1st clearest
Wind: 9 km/h; 6th windiest
Solar energy: 4.2 kWh/m²
Travel score: 8.5; 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.

← June Koster year-round climate August →Best places to visit in July

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 20°C through the month.

A typical July day in Koster reaches about 20°C in the afternoon and slips back to 5°C overnight — a 14°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 23°C. Set against its neighbours, July runs on par with June and about 3°C cooler than August.

	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)	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	20	20	20	20	20	20	20	20	20	20	20	20	21	21	21
Avg low (°C)	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	6	6	6	6	6	6	6	6	6	6	6

	Avg high (°C)	Avg low (°C)
1	19	5
2	19	5
3	19	5
4	19	5
5	19	5
6	19	5
7	19	5
8	19	5
9	19	5
10	19	5
11	19	5
12	19	5
13	19	5
14	19	5
15	19	5
16	19	5
17	20	5
18	20	5
19	20	5
20	20	5
21	20	6
22	20	6
23	20	6
24	20	6
25	20	6
26	20	6
27	20	6
28	20	6
29	21	6
30	21	6
31	21	6

Koster weather by month

How July compares with the rest of the year at a glance. July is the 12th-warmest and 12th-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 July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 88% of the time in July, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 6% of July, with mostly cloudy or overcast conditions the remaining 6%.

	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 (%)	92	92	92	92	92	91	91	92	92	93	93	93	94	94	94	95	95	95	95	95	95	96	96	96	96	95	95	95	95	95	94
Cloudier (%)	8	8	8	8	8	9	9	8	8	7	7	7	6	6	6	5	5	5	5	5	5	4	4	4	4	5	5	5	5	5	6

	Clearer (%)	Cloudier (%)
1	92	8
2	92	8
3	92	8
4	92	8
5	92	8
6	91	9
7	91	9
8	92	8
9	92	8
10	93	7
11	93	7
12	93	7
13	94	6
14	94	6
15	94	6
16	95	5
17	95	5
18	95	5
19	95	5
20	95	5
21	95	5
22	96	4
23	96	4
24	96	4
25	96	4
26	95	5
27	95	5
28	95	5
29	95	5
30	95	5
31	94	6

Chance of precipitation in July

Any precipitation

Koster gets around 3 mm of rain over 0.5 wet days in July, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 2% and peaks near 3% 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 (%)	3	3	3	3	3	3	3	2	2	2	2	2	1	1	1	1	1	1	1	1	1	1	2	2	2	2	2	3	3	3	3

	Rain chance (%)
1	3
2	3
3	3
4	3
5	3
6	3
7	3
8	2
9	2
10	2
11	2
12	2
13	1
14	1
15	1
16	1
17	1
18	1
19	1
20	1
21	1
22	1
23	2
24	2
25	2
26	2
27	2
28	3
29	3
30	3
31	3

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

Most of July feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, July lands in the dry band about 100% 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 (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

Wind in July

Winds average 9 km/h in July.

Across July, daily wind ranges from about 9 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	9	9	9	9	9	9	9	9	9
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	9	calm
24	9	calm
25	9	calm
26	9	calm
27	9	calm
28	9	calm
29	9	calm
30	9	calm
31	9	calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 10 h 24 min at the start of July to 10 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over July. Sunrise moves from 7:04 AM to 6:56 AM, and sunset from 5:28 PM to 5:41 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)	10.4	10.4	10.4	10.4	10.4	10.4	10.4	10.4	10.5	10.5	10.5	10.5	10.5	10.5	10.5	10.5	10.5	10.6	10.6	10.6	10.6	10.6	10.6	10.6	10.7	10.7	10.7	10.7	10.7	10.7	10.8
Sunrise (AM)	7:04	7:04	7:04	7:04	7:04	7:04	7:04	7:04	7:03	7:03	7:03	7:03	7:03	7:03	7:02	7:02	7:02	7:02	7:01	7:01	7:01	7:00	7:00	6:59	6:59	6:58	6:58	6:57	6:57	6:56	6:56
Sunset (PM)	5:28	5:28	5:28	5:29	5:29	5:30	5:30	5:30	5:31	5:31	5:32	5:32	5:33	5:33	5:33	5:34	5:34	5:35	5:35	5:36	5:36	5:37	5:37	5:38	5:38	5:39	5:39	5:40	5:40	5:41	5:41

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	10.4	7:04	5:28
2	10.4	7:04	5:28
3	10.4	7:04	5:28
4	10.4	7:04	5:29
5	10.4	7:04	5:29
6	10.4	7:04	5:30
7	10.4	7:04	5:30
8	10.4	7:04	5:30
9	10.5	7:03	5:31
10	10.5	7:03	5:31
11	10.5	7:03	5:32
12	10.5	7:03	5:32
13	10.5	7:03	5:33
14	10.5	7:03	5:33
15	10.5	7:02	5:33
16	10.5	7:02	5:34
17	10.5	7:02	5:34
18	10.6	7:02	5:35
19	10.6	7:01	5:35
20	10.6	7:01	5:36
21	10.6	7:01	5:36
22	10.6	7:00	5:37
23	10.6	7:00	5:37
24	10.6	6:59	5:38
25	10.7	6:59	5:38
26	10.7	6:58	5:39
27	10.7	6:58	5:39
28	10.7	6:57	5:40
29	10.7	6:57	5:40
30	10.7	6:56	5:41
31	10.8	6:56	5:41

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 4.2 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 — July's 4.2 kWh/m² sits near the bottom.

	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)	3.9	3.9	4.0	4.0	4.0	4.0	4.0	4.0	4.0	4.1	4.1	4.1	4.1	4.2	4.2	4.2	4.2	4.2	4.3	4.3	4.3	4.3	4.4	4.4	4.4	4.4	4.5	4.5	4.5	4.5	4.5
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	3.9	Moderate
2	3.9	Moderate
3	4.0	Moderate
4	4.0	Moderate
5	4.0	Moderate
6	4.0	Moderate
7	4.0	Bright
8	4.0	Bright
9	4.0	Bright
10	4.1	Bright
11	4.1	Bright
12	4.1	Bright
13	4.1	Bright
14	4.2	Bright
15	4.2	Bright
16	4.2	Bright
17	4.2	Bright
18	4.2	Bright
19	4.3	Bright
20	4.3	Bright
21	4.3	Bright
22	4.3	Bright
23	4.4	Bright
24	4.4	Bright
25	4.4	Bright
26	4.4	Bright
27	4.5	Bright
28	4.5	Bright
29	4.5	Bright
30	4.5	Bright
31	4.5	Bright

Planning a trip in July

Hazard calendar for Koster

In seasonPeak

None of Koster's seasonal hazards are active in July. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Koster's rainy season runs November–March, when most of the year's rain falls.

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is July a good time to visit Koster?

Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

8.5

Sightseeing

3rd-best month of the year

4.1

Beach & pool

11th-best month of the year

July is one of the better times to visit Koster for general sightseeing.

What to pack for Koster in July

From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In July, Koster sees daytime highs around 20°C and nights near 5°C. Worth packing: a warm layer.

a warm layer

UV index in Koster in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 6 — enough to warrant sun protection. 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 July

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where July 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

Location & terrain

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.

3 km

168 m

grassland 50%

16 km

397 m

grassland 54%

80 km

868 m

grassland 58%

treesshrubsgrasslandcroplandartificial surfaces

← June Koster year-round climate August →Best places to visit in July

July weather nearby: Rustenburg 41 km · Ventersdorp 51 km · Marikana 61 km · Carletonville 75 km · Hartbeestfontein-A 77 km · Coligny 78 km · Bagale 78 km · Lichtenburg 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).

	Avg high (°C)	Avg low (°C)
1	19	5
2	19	5
3	19	5
4	19	5
5	19	5
6	19	5
7	19	5
8	19	5
9	19	5
10	19	5
11	19	5
12	19	5
13	19	5
14	19	5
15	19	5
16	19	5
17	20	5
18	20	5
19	20	5
20	20	5
21	20	6
22	20	6
23	20	6
24	20	6
25	20	6
26	20	6
27	20	6
28	20	6
29	21	6
30	21	6
31	21	6

	Clearer (%)	Cloudier (%)
1	92	8
2	92	8
3	92	8
4	92	8
5	92	8
6	91	9
7	91	9
8	92	8
9	92	8
10	93	7
11	93	7
12	93	7
13	94	6
14	94	6
15	94	6
16	95	5
17	95	5
18	95	5
19	95	5
20	95	5
21	95	5
22	96	4
23	96	4
24	96	4
25	96	4
26	95	5
27	95	5
28	95	5
29	95	5
30	95	5
31	94	6

	Rain chance (%)
1	3
2	3
3	3
4	3
5	3
6	3
7	3
8	2
9	2
10	2
11	2
12	2
13	1
14	1
15	1
16	1
17	1
18	1
19	1
20	1
21	1
22	1
23	2
24	2
25	2
26	2
27	2
28	3
29	3
30	3
31	3

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°C)	Avg low (°C)
1	19	5
2	19	5
3	19	5
4	19	5
5	19	5
6	19	5
7	19	5
8	19	5
9	19	5
10	19	5
11	19	5
12	19	5
13	19	5
14	19	5
15	19	5
16	19	5
17	20	5
18	20	5
19	20	5
20	20	5
21	20	6
22	20	6
23	20	6
24	20	6
25	20	6
26	20	6
27	20	6
28	20	6
29	21	6
30	21	6
31	21	6

	Clearer (%)	Cloudier (%)
1	92	8
2	92	8
3	92	8
4	92	8
5	92	8
6	91	9
7	91	9
8	92	8
9	92	8
10	93	7
11	93	7
12	93	7
13	94	6
14	94	6
15	94	6
16	95	5
17	95	5
18	95	5
19	95	5
20	95	5
21	95	5
22	96	4
23	96	4
24	96	4
25	96	4
26	95	5
27	95	5
28	95	5
29	95	5
30	95	5
31	94	6

	Rain chance (%)
1	3
2	3
3	3
4	3
5	3
6	3
7	3
8	2
9	2
10	2
11	2
12	2
13	1
14	1
15	1
16	1
17	1
18	1
19	1
20	1
21	1
22	1
23	2
24	2
25	2
26	2
27	2
28	3
29	3
30	3
31	3

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°C)	Avg low (°C)
1	19	5
2	19	5
3	19	5
4	19	5
5	19	5
6	19	5
7	19	5
8	19	5
9	19	5
10	19	5
11	19	5
12	19	5
13	19	5
14	19	5
15	19	5
16	19	5
17	20	5
18	20	5
19	20	5
20	20	5
21	20	6
22	20	6
23	20	6
24	20	6
25	20	6
26	20	6
27	20	6
28	20	6
29	21	6
30	21	6
31	21	6

	Clearer (%)	Cloudier (%)
1	92	8
2	92	8
3	92	8
4	92	8
5	92	8
6	91	9
7	91	9
8	92	8
9	92	8
10	93	7
11	93	7
12	93	7
13	94	6
14	94	6
15	94	6
16	95	5
17	95	5
18	95	5
19	95	5
20	95	5
21	95	5
22	96	4
23	96	4
24	96	4
25	96	4
26	95	5
27	95	5
28	95	5
29	95	5
30	95	5
31	94	6

	Rain chance (%)
1	3
2	3
3	3
4	3
5	3
6	3
7	3
8	2
9	2
10	2
11	2
12	2
13	1
14	1
15	1
16	1
17	1
18	1
19	1
20	1
21	1
22	1
23	2
24	2
25	2
26	2
27	2
28	3
29	3
30	3
31	3

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100