Mariental weather in September

In September, Mariental sees average daytime highs of 29°C and overnight lows near 13°C, with 2 mm of rain across 0.3 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 28°C in the first days to 30°C by the end. The sky is clear or mostly clear about 86% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 30 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Mariental's 5th-clearest and 6th-windiest month. For the whole year in context, see Mariental's year-round climate.

Daytime high: 29°; 8th warmest
Overnight low: 13°; 5th coldest
Rainfall: 2 mm; 0.3 wet days
Daylight: 11 h 54 min; 6:47 AM – 6:38 PM
Cloud cover: 15%; 5th clearest
Wind: 14 km/h; 6th windiest
Solar energy: 6.7 kWh/m²
Travel score: 7.4; out of 10

Mariental is town in Namibia.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← August Mariental year-round climate October →Best places to visit in September

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 28°C in the first days to 30°C by the end.

A typical September day in Mariental reaches about 29°C in the afternoon and slips back to 13°C overnight — a 16°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 34°C. Set against its neighbours, September runs about 4°C warmer than August and about 3°C cooler than October.

	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
Avg high (°C)	28	28	28	28	28	28	28	29	29	29	29	29	29	29	29	29	29	29	30	30	30	30	30	30	30	30	30	30	30	31
Avg low (°C)	11	11	11	11	11	12	12	12	12	12	12	13	13	13	13	13	13	13	14	14	14	14	14	14	14	14	14	15	15	15

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

How September really feels in Mariental

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Mariental weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 9th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	34° / 22°	44	7.4	13.4	3.3
Feb	33° / 22°	53	8	12.9	3.7
Mar	32° / 20°	30	5.6	12.2	4.7
Apr	29° / 16°	17	3.4	11.4	6.8
May	26° / 11°	3	0.6	10.8	9.0
Jun	23° / 7°	1	0.3	10.5	9.5
Jul	23° / 6°	1	0.3	10.6	9.4
Aug	25° / 8°	0	0.1	11.1	9.5
Sep	29° / 13°	2	0.3	11.8	7.4
Oct	32° / 17°	6	1.1	12.6	5.3
Nov	33° / 19°	9	2.1	13.2	4.3
Dec	35° / 21°	25	3.7	13.5	3.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 86% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 8% of September, with mostly cloudy or overcast conditions the remaining 7%. Skies tend to cloud over as the month goes on.

	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
Clearer (%)	95	95	95	95	95	95	94	94	94	93	93	93	93	93	93	93	93	92	92	92	92	92	92	92	94	93	93	93	93	93
Cloudier (%)	5	5	5	5	5	5	6	6	6	7	7	7	7	7	7	7	7	8	8	8	8	8	8	8	6	7	7	7	7	7

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

Chance of precipitation in September

Any precipitation

Mariental gets around 2 mm of rain over 0.3 wet days in September. The line is the day-by-day chance of measurable precipitation.

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

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

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September 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
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

	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

Wind in September

Winds average 14 km/h in September.

Across September, daily wind ranges from about 14 km/h on the calmest days to 14 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
Wind speed (km/h)	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	14	light breeze
2	14	light breeze
3	14	light breeze
4	14	light breeze
5	14	light breeze
6	14	light breeze
7	14	light breeze
8	14	light breeze
9	14	light breeze
10	14	light breeze
11	14	light breeze
12	14	light breeze
13	14	light breeze
14	14	light breeze
15	14	light breeze
16	14	light breeze
17	14	light breeze
18	14	light breeze
19	14	light breeze
20	14	light breeze
21	14	light breeze
22	14	light breeze
23	14	light breeze
24	14	light breeze
25	14	light breeze
26	14	light breeze
27	14	light breeze
28	14	light breeze
29	14	light breeze
30	14	light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 30 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over September. Sunrise moves from 7:03 AM to 6:31 AM, and sunset from 6:33 PM to 6:44 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
Daylight (h)	11.5	11.5	11.5	11.6	11.6	11.6	11.6	11.7	11.7	11.7	11.7	11.8	11.8	11.8	11.8	11.9	11.9	11.9	11.9	12.0	12.0	12.0	12.0	12.1	12.1	12.1	12.1	12.2	12.2	12.2
Sunrise (AM)	7:03	7:02	7:01	7:00	6:59	6:58	6:57	6:56	6:54	6:53	6:52	6:51	6:50	6:49	6:48	6:47	6:46	6:44	6:43	6:42	6:41	6:40	6:39	6:38	6:37	6:36	6:35	6:34	6:32	6:31
Sunset (PM)	6:33	6:33	6:33	6:34	6:34	6:35	6:35	6:35	6:36	6:36	6:36	6:37	6:37	6:37	6:38	6:38	6:39	6:39	6:39	6:40	6:40	6:40	6:41	6:41	6:42	6:42	6:42	6:43	6:43	6:44

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.5	7:03	6:33
2	11.5	7:02	6:33
3	11.5	7:01	6:33
4	11.6	7:00	6:34
5	11.6	6:59	6:34
6	11.6	6:58	6:35
7	11.6	6:57	6:35
8	11.7	6:56	6:35
9	11.7	6:54	6:36
10	11.7	6:53	6:36
11	11.7	6:52	6:36
12	11.8	6:51	6:37
13	11.8	6:50	6:37
14	11.8	6:49	6:37
15	11.8	6:48	6:38
16	11.9	6:47	6:38
17	11.9	6:46	6:39
18	11.9	6:44	6:39
19	11.9	6:43	6:39
20	12.0	6:42	6:40
21	12.0	6:41	6:40
22	12.0	6:40	6:40
23	12.0	6:39	6:41
24	12.1	6:38	6:41
25	12.1	6:37	6:42
26	12.1	6:36	6:42
27	12.1	6:35	6:42
28	12.2	6:34	6:43
29	12.2	6:32	6:43
30	12.2	6:31	6:44

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.7 kWh/m².

For context, solar energy here swings from a low near 4.31 kWh/m² to a high of 8.54 kWh/m² in December across the year — September's 6.7 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
Solar energy (kWh/m²)	6.2	6.2	6.2	6.3	6.3	6.3	6.4	6.4	6.4	6.5	6.5	6.5	6.6	6.6	6.7	6.7	6.7	6.8	6.8	6.9	6.9	6.9	7.0	7.0	7.1	7.1	7.1	7.2	7.2	7.3
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

	Solar energy (kWh/m²)	Level
1	6.2	Intense
2	6.2	Intense
3	6.2	Intense
4	6.3	Intense
5	6.3	Intense
6	6.3	Intense
7	6.4	Intense
8	6.4	Intense
9	6.4	Intense
10	6.5	Intense
11	6.5	Intense
12	6.5	Intense
13	6.6	Intense
14	6.6	Intense
15	6.7	Intense
16	6.7	Intense
17	6.7	Intense
18	6.8	Intense
19	6.8	Intense
20	6.9	Intense
21	6.9	Intense
22	6.9	Intense
23	7.0	Intense
24	7.0	Intense
25	7.1	Intense
26	7.1	Intense
27	7.1	Intense
28	7.2	Intense
29	7.2	Intense
30	7.3	Intense

Planning a trip in September

Is September a good time to visit Mariental?

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

7.4

Sightseeing

5th-best month of the year

9.2

Beach & pool

1st-best month of the year

September is one of the better times to visit Mariental for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Mariental in September

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

In September, Mariental sees daytime highs around 29°C and nights near 13°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Mariental in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mariental peaks around January 15 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 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)	16	14	13	9	7	5	6	8	10	13	14	14
Level	Extreme	Extreme	Extreme	Very high	High	High	High	Very high	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	16	Extreme
Feb	14	Extreme
Mar	13	Extreme
Apr	9	Very high
May	7	High
Jun	5	High
Jul	6	High
Aug	8	Very high
Sep	10	Extreme
Oct	13	Extreme
Nov	14	Extreme
Dec	14	Extreme

Air quality in Mariental in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Mariental is worst in December — around 15 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (April, 9 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)	12	11	10	9	9	12	12	12	13	14	15	15
Level	Moderate	Good	Good	Good	Good	Good	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	12	Moderate
Feb	11	Good
Mar	10	Good
Apr	9	Good
May	9	Good
Jun	12	Good
Jul	12	Moderate
Aug	12	Moderate
Sep	13	Moderate
Oct	14	Moderate
Nov	15	Moderate
Dec	15	Moderate

Location & terrain

Where is Mariental?

Mariental sits at 24.6°S, 18.0°E, 0 m above sea level, in Namibia. The nearest listed city is Rehoboth, 171 km away.

Topography around Mariental

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Mariental.

Within 3 km, the terrain around Mariental has only modest variations in elevation — a maximum elevation change of 44 m around an average of 1,105 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 150 m; within 80 km, significant variations in elevation — a maximum elevation change of 454 m.

The land around Mariental is covered by bare terrain (35%) and grassland (20%) within 3 km, grassland (52%) and bare terrain (24%) within 16 km, and grassland (71%) within 80 km.

3 km

44 m

bare terrain 35%

16 km

150 m

grassland 52%

80 km

454 m

grassland 71%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwetland

← August Mariental year-round climate October →Best places to visit in September

September weather nearby: Rehoboth 171 km · Keetmanshoop 217 km · Windhoek 247 km · Katutura 251 km · Gobabis 263 km · Okahandja 314 km · Lüderitz 360 km · Walvis Bay 398 km

Namibia travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type D / M; 220 V · 50 Hz
Prices: ≈ 41% of US; price level, 2025
GDP per capita: $4,876; 2025
Happiness: 4.8 / 10; World Happiness, 2025
Homicide rate: 11.2; per 100k, 2021
Road deaths: 34.8; per 100k/yr, 2019
Income group: Lower middle; World Bank
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 Mariental (-24.6271°, 17.9647°, elevation 0 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	28	11
2	28	11
3	28	11
4	28	11
5	28	11
6	28	12
7	28	12
8	29	12
9	29	12
10	29	12
11	29	12
12	29	13
13	29	13
14	29	13
15	29	13
16	29	13
17	29	13
18	29	13
19	30	14
20	30	14
21	30	14
22	30	14
23	30	14
24	30	14
25	30	14
26	30	14
27	30	14
28	30	15
29	30	15
30	31	15

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

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

	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

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

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

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

	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

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

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

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

	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