Mariental in Summer
In summer (December, January and February), Mariental sees average daytime highs around 34°C and overnight lows near 22°C, with 122 mm of rain over about 19 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 34°C. The sky is clear or mostly clear about 69% of the time across summer, and the air most often feels dry.
Summer is Mariental's weakest season of the year to visit on our travel score. For the whole year in context, see Mariental's year-round climate.
- Avg daytime high
- 34°C
- warmest season of the year
- Avg overnight low
- 22°C
- Rainfall
- 122 mm
- 19 wet days
- Avg wind
- 13 km/h
- Travel score
- 3.4
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Mariental in Summer
Across summer, daytime highs hold fairly steady around 34°C.
A typical summer day in Mariental reaches about 34°C and drops to 22°C overnight. The warmest of the three months is December, the coolest December.
How summer really feels in Mariental
Once humidity and wind are folded in, summer brings about 90 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Mariental weather by month
How the three summer months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| 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 Summer
The sky is clear or mostly clear about 69% of the time across summer.
Chance of precipitation in Summer
Mariental gets around 122 mm of rain over 19 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 13 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 24 min in early December to 12 h 36 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 8.0 kWh/m².
Is summer a good time to visit Mariental?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a weaker month for outdoor sightseeing in Mariental. The water and warmth also suit a beach or pool day.
What to pack for Mariental in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Mariental sees daytime highs around 34°C and nights near 22°C. Pack light clothes and sun protection. Worth having: rain gear. About 19 days see rain.
UV index in Mariental in Summer
Clear-sky midday UV across summer averages 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 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 Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer 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 |
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.
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.