Otjiwarongo weather in September

In September, Otjiwarongo sees average daytime highs of 31°C and overnight lows near 14°C, with 4 mm of rain across 1.2 wet days and about 11.9 hours of daylight. It is the 4th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 29°C in the first days to 32°C by the end. The sky is clear or mostly clear about 81% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 36 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Otjiwarongo's 5th-clearest and 2nd-windiest month. For the whole year in context, see Otjiwarongo's year-round climate.

Daytime high
31°
4th warmest
Overnight low
14°
5th coldest
Rainfall
4 mm
1.2 wet days
Daylight
11 h 54 min
6:51 AM – 6:44 PM
Cloud cover
18%
5th clearest
Wind
12 km/h
2nd windiest
Solar energy
6.72 kWh/m²
Travel score
6.2
out of 10

Otjiwarongo is city in Namibia.

Founded
1906

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 29°C in the first days to 32°C by the end.

A typical September day in Otjiwarongo reaches about 31°C in the afternoon and slips back to 14°C overnight — a 16°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 33°C. Set against its neighbours, September runs about 4°C warmer than August and about 2°C cooler than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12912
22913
32913
43013
53013
63013
73013
83013
93014
103014
113014
123014
133014
143114
153114
163114
173114
183115
193115
203115
213115
223115
233115
243115
253115
263215
273215
283216
293216
303216

How September really feels in Otjiwarongo

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
0
heat index over the day's high
Days feeling ≤ C
0
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.

Otjiwarongo weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 18°12114.213.14.3
Feb30° / 18°11814.312.74.5
Mar29° / 17°8312.712.15.4
Apr28° / 15°285.611.57.5
May26° / 12°20.4119.1
Jun24° / 0010.89.7
Jul24° / 00.110.99.6
Aug27° / 10°00.111.38.8
Sep31° / 14°41.211.96.2
Oct32° / 17°184.412.54.6
Nov32° / 18°428.3134.3
Dec32° / 18°8211.813.24.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 81% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 6%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1955
2955
3955
4955
5955
6946
7946
8946
9946
10946
11946
12946
13946
14946
15946
16946
17946
18946
19946
20946
21946
22946
23946
24946
25946
26946
27946
28946
29955
30955

Chance of precipitation in September

Any precipitation

Otjiwarongo gets around 4 mm of rain over 1.2 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 4% and peaks near 8% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
11
21
32
42
52
62
72
82
92
102
113
123
133
143
153
163
174
184
194
205
215
225
236
246
256
267
277
287
298
308

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.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
30991

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 36 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 36 minutes over September. Sunrise moves from 7:05 AM to 6:38 AM, and sunset from 6:41 PM to 6:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.67:056:41
211.67:056:41
311.67:046:41
411.67:036:42
511.77:026:42
611.77:016:42
711.77:006:42
811.76:596:42
911.76:586:43
1011.86:576:43
1111.86:566:43
1211.86:556:43
1311.86:546:44
1411.86:536:44
1511.96:526:44
1611.96:516:44
1711.96:506:45
1811.96:496:45
1911.96:486:45
2012.06:476:45
2112.06:466:45
2212.06:456:46
2312.06:446:46
2412.06:436:46
2512.16:426:46
2612.16:426:47
2712.16:416:47
2812.16:406:47
2912.16:396:47
3012.26:386:48

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.72 kWh/m².

For context, solar energy here swings from a low near 4.85 kWh/m² to a high of 7.42 kWh/m² in November across the year — September's 6.72 kWh/m² falls in the middle.

02468151015202530
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.4Intense
46.4Intense
56.5Intense
66.5Intense
76.5Intense
86.5Intense
96.6Intense
106.6Intense
116.6Intense
126.6Intense
136.7Intense
146.7Intense
156.7Intense
166.7Intense
176.8Intense
186.8Intense
196.8Intense
206.8Intense
216.9Intense
226.9Intense
236.9Intense
246.9Intense
257.0Intense
267.0Intense
277.0Intense
287.0Intense
297.0Intense
307.1Intense
Planning a trip in September

Is September a good time to visit Otjiwarongo?

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

6.2
Sightseeing
6th-best month of the year
8.8
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Otjiwarongo for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Otjiwarongo in September

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

In September, Otjiwarongo sees daytime highs around 31°C and nights near 14°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Otjiwarongo 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 Otjiwarongo peaks around January 15 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 7 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highVery highExtremeJan 15UV 16Jun 19UV 7
UV index (midday)Level
Jan16Extreme
Feb14Extreme
Mar14Extreme
Apr10Extreme
May8Very high
Jun7High
Jul7Very high
Aug9Very high
Sep10Very high
Oct12Extreme
Nov14Extreme
Dec14Extreme

Air quality in Otjiwarongo 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 Otjiwarongo is worst in October — around 19 µg/m³ PM2.5 (moderate), about 4.7× the cleanest month (May, 4 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateOct 1019 µg/m³May 154 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb10Good
Mar7Good
Apr4Good
May4Good
Jun5Good
Jul5Good
Aug11Good
Sep19Moderate
Oct19Moderate
Nov16Moderate
Dec13Moderate
Location & terrain

Where is Otjiwarongo?

Otjiwarongo sits at 20.5°S, 16.6°E, 1,475 m above sea level, in Namibia. The nearest listed city is Okahandja, 171 km away.

OkahandjaTsumebGrootfonteinKatuturaWindhoekOndangwaOngwedivaOshakati

Topography around Otjiwarongo

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

Within 3 km, the terrain around Otjiwarongo has only modest variations in elevation — a maximum elevation change of 59 m around an average of 1,466 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 402 m; within 80 km, large variations in elevation — a maximum elevation change of 1,016 m.

The land around Otjiwarongo is covered by shrubs (61%) and artificial surfaces (22%) within 3 km, shrubs (84%) within 16 km, and shrubs (92%) within 80 km.

3 km
59 m
16 km
402 m
80 km
1,016 m
treesshrubsgrasslandartificial surfacesbare terrain
September weather nearby: Okahandja 171 km · Tsumeb 175 km · Grootfontein 181 km · Katutura 233 km · Windhoek 237 km · Ondangwa 293 km · Ongwediva 313 km · Oshakati 314 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
Christian 98%unaffiliated 2%other 1%

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 Otjiwarongo (-20.4637°, 16.6477°, elevation 1,475 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).