Climate and average weather in Mariental
In Mariental, the summers are sweltering, fairly dry, and clear and the winters are warm and clear.
Over the course of the year, the temperature in Mariental typically varies from 6°C to 35°C, and is rarely below 2°C or above 38°C. December is the hottest month of the year, while July is the coldest.
Based on the travel score, the best time of year to visit Mariental for warm-weather activities is from late April to mid September.
- Hottest
- Dec
- 35°
- Coldest
- Jul
- 6°
- Wettest
- Feb
- 53 mm
- Driest
- Aug
- 0 mm
- Rain / yr
- 191 mm
- 33 wet days
- Daylight
- 10.5–13.5 h
- shortest–longest
- Elevation
- 0 m
- 24.6°S
- Clearest
- Jul
- 8% cloud
Mariental is town in Namibia.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Mariental weather by month, at a glance
The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.
Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around late April to mid September.
Temperature through the year
Daily average highs and lows in Mariental, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 5.4 months, from October 11 to March 23, with daily high temperatures above 32°C. The hottest month of the year in Mariental is December, with an average high of 35°C and low of 21°C.
The cool season lasts 2.6 months, from May 28 to August 13, with daily high temperatures below 25°C. The coldest month of the year in Mariental is July, with an average low of 6°C and high of 23°C.
Days typically run about 14°C warmer than nights, with the widest day–night swing (around 17°C) in August.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 34 | 33 | 32 | 29 | 26 | 23 | 23 | 25 | 29 | 32 | 33 | 35 |
| Avg low (°C) | 22 | 22 | 20 | 16 | 11 | 7 | 6 | 8 | 13 | 17 | 19 | 21 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 34 | 22 |
| Feb | 33 | 22 |
| Mar | 32 | 20 |
| Apr | 29 | 16 |
| May | 26 | 11 |
| Jun | 23 | 7 |
| Jul | 23 | 6 |
| Aug | 25 | 8 |
| Sep | 29 | 13 |
| Oct | 32 | 17 |
| Nov | 33 | 19 |
| Dec | 35 | 21 |
How hot and cold Mariental really feels
The felt-temperature range through the year — heat index on the day's high (summer humidity), wind chill on the night's low (winter wind). The dashed lines are the plain thermometer; the gap is how much hotter or colder it really feels.
On the hottest afternoons, once humidity is folded in, Mariental feels like about 35°C (around December 16). About 157 days a year carry some heat stress, peaking in December.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels-like high (°C) | 34 | 33 | 32 | 29 | 26 | 23 | 22 | 25 | 29 | 32 | 33 | 35 |
| Air high (°C) | 34 | 33 | 32 | 29 | 26 | 23 | 23 | 25 | 29 | 32 | 33 | 35 |
| Feels-like low (°C) | 22 | 22 | 20 | 16 | 11 | 4 | 4 | 6 | 13 | 17 | 19 | 21 |
| Air low (°C) | 22 | 22 | 20 | 16 | 11 | 7 | 6 | 8 | 13 | 17 | 19 | 21 |
| Feels-like high (°C) | Air high (°C) | Feels-like low (°C) | Air low (°C) | |
|---|---|---|---|---|
| Jan | 34 | 34 | 22 | 22 |
| Feb | 33 | 33 | 22 | 22 |
| Mar | 32 | 32 | 20 | 20 |
| Apr | 29 | 29 | 16 | 16 |
| May | 26 | 26 | 11 | 11 |
| Jun | 23 | 23 | 4 | 7 |
| Jul | 22 | 23 | 4 | 6 |
| Aug | 25 | 25 | 6 | 8 |
| Sep | 29 | 29 | 13 | 13 |
| Oct | 32 | 32 | 17 | 17 |
| Nov | 33 | 33 | 19 | 19 |
| Dec | 35 | 35 | 21 | 21 |
Average hourly temperature in Mariental
A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on December afternoons, near 35°C, and coldest before dawn in July, near 6°C.
Mariental weather by month
Every month at a glance. Click a month for its detailed page.
| 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 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Mariental gets about 191 mm of precipitation a year. On a typical day the chance of rain is mostly dry, but that rises and falls sharply with the seasons.
The wetter season lasts 4.9 months, from around Nov 24 to Apr 20, peaking in February at about 30% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Aug 14.
February is the wettest month by volume, with 53 mm over about 8 wet days; August is the driest, with 0 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 24 | 28 | 18 | 11 | 2 | 1 | 1 | 0 | 1 | 3 | 7 | 12 |
| Rain days | 7 | 8 | 6 | 3 | 1 | 0 | 0 | 0 | 0 | 1 | 2 | 4 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 24 | 7 |
| Feb | 28 | 8 |
| Mar | 18 | 6 |
| Apr | 11 | 3 |
| May | 2 | 1 |
| Jun | 1 | 0 |
| Jul | 1 | 0 |
| Aug | 0 | 0 |
| Sep | 1 | 0 |
| Oct | 3 | 1 |
| Nov | 7 | 2 |
| Dec | 12 | 4 |
Monthly rainfall
Over a full year, Mariental collects about 191 mm of rain across 33 wet days — roughly 16 mm in an average month.
It doesn’t fall evenly. February is the wettest month with 53 mm, while August is the driest at just 0 mm. The three wettest months alone bring about 67% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 44 | 53 | 30 | 17 | 3 | 1 | 1 | 0 | 2 | 6 | 9 | 25 |
| Rain days | 7 | 8 | 6 | 3 | 1 | 0 | 0 | 0 | 0 | 1 | 2 | 4 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 44 | 7 |
| Feb | 53 | 8 |
| Mar | 30 | 6 |
| Apr | 17 | 3 |
| May | 3 | 1 |
| Jun | 1 | 0 |
| Jul | 1 | 0 |
| Aug | 0 | 0 |
| Sep | 2 | 0 |
| Oct | 6 | 1 |
| Nov | 9 | 2 |
| Dec | 25 | 4 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Mariental, the average share of the sky covered by clouds shows moderate seasonal variation over the course of the year.
The clearer part of the year begins around April 15 and lasts for 5.8 months, ending around October 9. The clearest month is July, when the sky is clear, mostly clear, or partly cloudy 97% of the time on average.
The cloudier part of the year begins around November 6 and lasts for 5.3 months, ending around April 14. The cloudiest month is January, when it is overcast or mostly cloudy 18% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 82 | 84 | 88 | 91 | 94 | 95 | 97 | 96 | 93 | 91 | 90 | 88 |
| Cloudier (%) | 18 | 16 | 12 | 9 | 6 | 5 | 3 | 4 | 7 | 9 | 10 | 12 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 82 | 18 |
| Feb | 84 | 16 |
| Mar | 88 | 12 |
| Apr | 91 | 9 |
| May | 94 | 6 |
| Jun | 95 | 5 |
| Jul | 97 | 3 |
| Aug | 96 | 4 |
| Sep | 93 | 7 |
| Oct | 91 | 9 |
| Nov | 90 | 10 |
| Dec | 88 | 12 |
Daylight, sunrise and sunset
Hours of daylight through the year, with sunrise and sunset times.
The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around January 1, brings about 13 h 30 min of light; the shortest, around June 5, only 10 h 30 min — a swing of roughly 3 hours.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.4 | 12.9 | 12.2 | 11.4 | 10.8 | 10.5 | 10.6 | 11.1 | 11.8 | 12.6 | 13.2 | 13.5 |
| Sunrise (AM) | 6:16 | 6:37 | 6:52 | 7:06 | 7:20 | 7:34 | 7:35 | 7:18 | 6:47 | 6:16 | 5:57 | 5:59 |
| Sunset (PM) | 7:39 | 7:28 | 7:03 | 6:31 | 6:09 | 6:03 | 6:12 | 6:26 | 6:38 | 6:51 | 7:10 | 7:30 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 13.4 | 6:16 | 7:39 |
| Feb | 12.9 | 6:37 | 7:28 |
| Mar | 12.2 | 6:52 | 7:03 |
| Apr | 11.4 | 7:06 | 6:31 |
| May | 10.8 | 7:20 | 6:09 |
| Jun | 10.5 | 7:34 | 6:03 |
| Jul | 10.6 | 7:35 | 6:12 |
| Aug | 11.1 | 7:18 | 6:26 |
| Sep | 11.8 | 6:47 | 6:38 |
| Oct | 12.6 | 6:16 | 6:51 |
| Nov | 13.2 | 5:57 | 7:10 |
| Dec | 13.5 | 5:59 | 7:30 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Mariental averages about 24 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 20 and 29 days.
The sunnier stretch runs 5.7 months, from around Apr 18 to Oct 7. The sunniest month is July, with roughly 28 sunny days (brilliant).
The greyest month is February, down near 20 sunny days — about 29% fewer than the July peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 21 | 18 | 23 | 24 | 27 | 27 | 29 | 28 | 26 | 24 | 23 | 23 |
| Sky | Bright | Bright | Bright | Brilliant | Brilliant | Brilliant | Brilliant | Brilliant | Brilliant | Brilliant | Brilliant | Bright |
| Sunny days | Sky | |
|---|---|---|
| Jan | 21 | Bright |
| Feb | 18 | Bright |
| Mar | 23 | Bright |
| Apr | 24 | Brilliant |
| May | 27 | Brilliant |
| Jun | 27 | Brilliant |
| Jul | 29 | Brilliant |
| Aug | 28 | Brilliant |
| Sep | 26 | Brilliant |
| Oct | 24 | Brilliant |
| Nov | 23 | Brilliant |
| Dec | 23 | Bright |
Humidity comfort
Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.
Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.
In Mariental, how humid it feels changes dramatically over the year.
The more humid part of the year lasts 3.7 months, from around December 20 to April 12. The muggiest month is February, when the air feels humid, muggy or worse about 29% of the time.
The most comfortable stretch runs from around April 13 to December 19, and May is the most comfortable month — the air is dry or comfortable 100% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 68 | 60 | 70 | 84 | 99 | 100 | 100 | 100 | 100 | 98 | 94 | 86 |
| Comfortable (%) | 11 | 11 | 13 | 11 | 1 | 0 | 0 | 0 | 0 | 1 | 3 | 6 |
| Humid (%) | 13 | 18 | 13 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 5 |
| Muggy (%) | 8 | 11 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| Jan | 68 | 11 | 13 | 8 |
| Feb | 60 | 11 | 18 | 11 |
| Mar | 70 | 13 | 13 | 4 |
| Apr | 84 | 11 | 5 | 1 |
| May | 99 | 1 | 0 | 0 |
| Jun | 100 | 0 | 0 | 0 |
| Jul | 100 | 0 | 0 | 0 |
| Aug | 100 | 0 | 0 | 0 |
| Sep | 100 | 0 | 0 | 0 |
| Oct | 98 | 1 | 0 | 0 |
| Nov | 94 | 3 | 2 | 0 |
| Dec | 86 | 6 | 5 | 2 |
Wind
Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.
This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.
Wind in Mariental is steady company: average speeds sit near 14 km/h — light breeze — in every month of the year, with no meaningful windy or calm season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 13 | 12 | 12 | 13 | 13 | 13 | 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 |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 13 | light breeze |
| Feb | 12 | light breeze |
| Mar | 12 | light breeze |
| Apr | 13 | light breeze |
| May | 13 | light breeze |
| Jun | 13 | light breeze |
| Jul | 14 | light breeze |
| Aug | 14 | light breeze |
| Sep | 14 | light breeze |
| Oct | 14 | light breeze |
| Nov | 14 | light breeze |
| Dec | 14 | light breeze |
Best time to visit Mariental
To characterize how pleasant the weather is in Mariental throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around early May, Mariental is still near the start of its best-weather window — great conditions with the peak-season crowds not yet at full swing.
Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.
The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Mariental for general outdoor tourist activities is from late April to mid September, with a peak score in the first week of August.
The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Travel score (0–10) | 3.3 | 3.7 | 4.7 | 6.8 | 8.9 | 9.4 | 9.4 | 9.4 | 7.4 | 5.4 | 4.2 | 3.3 |
| Rating | poor | fair | fair | good | ideal | ideal | ideal | ideal | good | fair | fair | poor |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 3.3 | poor |
| Feb | 3.7 | fair |
| Mar | 4.7 | fair |
| Apr | 6.8 | good |
| May | 8.9 | ideal |
| Jun | 9.4 | ideal |
| Jul | 9.4 | ideal |
| Aug | 9.4 | ideal |
| Sep | 7.4 | good |
| Oct | 5.4 | fair |
| Nov | 4.2 | fair |
| Dec | 3.3 | poor |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best times of year to visit Mariental for hot-weather activities run from mid March to early June and again from late July to late November, with a peak score in the second week of September.
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
What to pack for Mariental, by month
Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.
For a warm-season trip around December (highs near 35°C), the essentials are light clothes and sun protection. In the cold season around July (highs near 23°C), pack light clothes, a warm layer and sun protection.
In December, Mariental sees daytime highs around 35°C and nights near 21°C. Pack light clothes and sun protection. About 4 days see rain.
UV index (midday) in Mariental by month
Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.
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 |
Average hourly UV index in Mariental
Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.
The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
UV falls off far faster than brightness as the sun drops, so even in January the burn window is concentrated in the middle of the day: about 9 hours a day reach index 3 (protection recommended), and 7.5 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV ≥ 3 (h/day) | 9 | 8.5 | 8 | 7 | 6 | 5 | 5.5 | 6 | 7.5 | 8.5 | 9 | 9 |
| UV ≥ 6 (h/day) | 7.5 | 7 | 6.5 | 4.5 | 2.5 | 0 | 1.5 | 3.5 | 5 | 6.5 | 7 | 7.5 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 9 | 7.5 |
| Feb | 8.5 | 7 |
| Mar | 8 | 6.5 |
| Apr | 7 | 4.5 |
| May | 6 | 2.5 |
| Jun | 5 | 0 |
| Jul | 5.5 | 1.5 |
| Aug | 6 | 3.5 |
| Sep | 7.5 | 5 |
| Oct | 8.5 | 6.5 |
| Nov | 9 | 7 |
| Dec | 9 | 7.5 |
Air quality in Mariental by month
Average fine-particle pollution (PM2.5) through the year — so you can see which months the air is worst, not just the yearly 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 |
Growing season
Mariental is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 100 | 100 | 100 | 100 | 100 | 99 | 97 | 99 | 100 | 100 | 100 | 100 |
| Frost nights | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 100 | 0 |
| Feb | 100 | 0 |
| Mar | 100 | 0 |
| Apr | 100 | 0 |
| May | 100 | 0 |
| Jun | 99 | 0 |
| Jul | 97 | 0 |
| Aug | 99 | 0 |
| Sep | 100 | 0 |
| Oct | 100 | 0 |
| Nov | 100 | 0 |
| Dec | 100 | 0 |
Growing degree days
Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Mariental banks about 4,506 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around January.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 560 | 488 | 495 | 377 | 273 | 149 | 138 | 209 | 330 | 447 | 486 | 555 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 560 |
| Feb | 488 |
| Mar | 495 |
| Apr | 377 |
| May | 273 |
| Jun | 149 |
| Jul | 138 |
| Aug | 209 |
| Sep | 330 |
| Oct | 447 |
| Nov | 486 |
| Dec | 555 |
Solar energy
Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.
Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.
Mariental receives about 6.5 kWh/m² a day of solar energy on average — intense — with a clear seasonal swing between 4.3 and 8.6 kWh/m².
The brighter stretch of the year lasts 6.2 months, from around Sep 12 to Mar 20. The brightest month is December, averaging about 8.5 kWh/m² (intense).
The dimmest month is June, down near 4.3 kWh/m² — roughly 49% less than the December peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 8.1 | 7.4 | 6.7 | 5.6 | 4.8 | 4.3 | 4.5 | 5.5 | 6.7 | 7.7 | 8.3 | 8.5 |
| Level | Intense | Intense | Intense | Bright | Bright | Bright | Bright | Bright | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 8.1 | Intense |
| Feb | 7.4 | Intense |
| Mar | 6.7 | Intense |
| Apr | 5.6 | Bright |
| May | 4.8 | Bright |
| Jun | 4.3 | Bright |
| Jul | 4.5 | Bright |
| Aug | 5.5 | Bright |
| Sep | 6.7 | Intense |
| Oct | 7.7 | Intense |
| Nov | 8.3 | Intense |
| Dec | 8.5 | Intense |
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. 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).