Climate and average weather in Grootfontein
In Grootfontein, the summers are hot, fairly dry, and mostly clear and the winters are warm and clear.
Over the course of the year, the temperature in Grootfontein typically varies from 8°C to 32°C, and is rarely below 5°C or above 36°C. October is the hottest month of the year, while July is the coldest.
Based on the travel score, the best time of year to visit Grootfontein for warm-weather activities is from mid April to late August.
- Hottest
- Oct
- 32°
- Coldest
- Jul
- 8°
- Wettest
- Jan
- 165 mm
- Driest
- Jun
- 0 mm
- Rain / yr
- 675 mm
- 87 wet days
- Daylight
- 10.8–13.2 h
- shortest–longest
- Elevation
- 1,432 m
- 19.6°S
- Clearest
- Jun
- 7% cloud
Grootfontein is city in Namibia.
- Founded
- 1885
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Grootfontein 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 mid April to late August.
Temperature through the year
Daily average highs and lows in Grootfontein, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 3.6 months, from September 10 to December 29, with daily high temperatures above 30°C. The hottest month of the year in Grootfontein is October, with an average high of 32°C and low of 18°C.
The cool season lasts 2.1 months, from May 29 to July 30, with daily high temperatures below 24°C. The coldest month of the year in Grootfontein is July, with an average low of 8°C and high of 23°C.
Days typically run about 13°C warmer than nights, with the widest day–night swing (around 16°C) in August.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 28 | 28 | 27 | 25 | 23 | 23 | 27 | 30 | 32 | 31 | 30 |
| Avg low (°C) | 19 | 18 | 18 | 15 | 12 | 8 | 8 | 11 | 15 | 18 | 19 | 19 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 29 | 19 |
| Feb | 28 | 18 |
| Mar | 28 | 18 |
| Apr | 27 | 15 |
| May | 25 | 12 |
| Jun | 23 | 8 |
| Jul | 23 | 8 |
| Aug | 27 | 11 |
| Sep | 30 | 15 |
| Oct | 32 | 18 |
| Nov | 31 | 19 |
| Dec | 30 | 19 |
How hot and cold Grootfontein 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, Grootfontein feels like about 32°C (around October 12). About 26 days a year carry some heat stress, peaking in October.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels-like high (°C) | 29 | 28 | 28 | 27 | 25 | 23 | 23 | 27 | 30 | 32 | 31 | 30 |
| Air high (°C) | 29 | 28 | 28 | 27 | 25 | 23 | 23 | 27 | 30 | 32 | 31 | 30 |
| Feels-like low (°C) | 19 | 18 | 18 | 15 | 11 | 6 | 6 | 10 | 15 | 18 | 19 | 19 |
| Air low (°C) | 19 | 18 | 18 | 15 | 12 | 8 | 8 | 11 | 15 | 18 | 19 | 19 |
| Feels-like high (°C) | Air high (°C) | Feels-like low (°C) | Air low (°C) | |
|---|---|---|---|---|
| Jan | 29 | 29 | 19 | 19 |
| Feb | 28 | 28 | 18 | 18 |
| Mar | 28 | 28 | 18 | 18 |
| Apr | 27 | 27 | 15 | 15 |
| May | 25 | 25 | 11 | 12 |
| Jun | 23 | 23 | 6 | 8 |
| Jul | 23 | 23 | 6 | 8 |
| Aug | 27 | 27 | 10 | 11 |
| Sep | 30 | 30 | 15 | 15 |
| Oct | 32 | 32 | 18 | 18 |
| Nov | 31 | 31 | 19 | 19 |
| Dec | 30 | 30 | 19 | 19 |
Average hourly temperature in Grootfontein
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 October afternoons, near 32°C, and coldest before dawn in July, near 8°C.
Grootfontein 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 | 29° / 19° | 165 | 16.9 | 13 | 4.5 |
| Feb | 28° / 18° | 147 | 15.9 | 12.7 | 4.8 |
| Mar | 28° / 18° | 112 | 14.7 | 12.1 | 5.6 |
| Apr | 27° / 15° | 33 | 5.8 | 11.6 | 7.6 |
| May | 25° / 12° | 1 | 0.5 | 11.1 | 9.2 |
| Jun | 23° / 8° | 0 | 0 | 10.8 | 9.6 |
| Jul | 23° / 8° | 0 | 0 | 10.9 | 9.5 |
| Aug | 27° / 11° | 0 | 0.1 | 11.3 | 8.9 |
| Sep | 30° / 15° | 5 | 0.9 | 11.9 | 6.4 |
| Oct | 32° / 18° | 23 | 4.7 | 12.5 | 4.6 |
| Nov | 31° / 19° | 71 | 12.1 | 12.9 | 4.2 |
| Dec | 30° / 19° | 117 | 15.7 | 13.2 | 4.2 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Grootfontein gets about 675 mm of precipitation a year. On a typical day the chance of rain is some rain, but that rises and falls sharply with the seasons.
The wetter season lasts 5.4 months, from around Oct 28 to Apr 10, peaking in February at about 59% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jun 11.
January is the wettest month by volume, with 165 mm over about 17 wet days; June is the driest, with 0 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 55 | 56 | 47 | 19 | 2 | 0 | 0 | 0 | 3 | 15 | 40 | 50 |
| Rain days | 17 | 16 | 15 | 6 | 1 | 0 | 0 | 0 | 1 | 5 | 12 | 16 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 55 | 17 |
| Feb | 56 | 16 |
| Mar | 47 | 15 |
| Apr | 19 | 6 |
| May | 2 | 1 |
| Jun | 0 | 0 |
| Jul | 0 | 0 |
| Aug | 0 | 0 |
| Sep | 3 | 1 |
| Oct | 15 | 5 |
| Nov | 40 | 12 |
| Dec | 50 | 16 |
Monthly rainfall
Over a full year, Grootfontein collects about 675 mm of rain across 87 wet days — roughly 56 mm in an average month.
It doesn’t fall evenly. January is the wettest month with 165 mm, while June is the driest at just 0 mm. The three wettest months alone bring about 64% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 165 | 147 | 112 | 33 | 1 | 0 | 0 | 0 | 5 | 23 | 71 | 117 |
| Rain days | 17 | 16 | 15 | 6 | 1 | 0 | 0 | 0 | 1 | 5 | 12 | 16 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 165 | 17 |
| Feb | 147 | 16 |
| Mar | 112 | 15 |
| Apr | 33 | 6 |
| May | 1 | 1 |
| Jun | 0 | 0 |
| Jul | 0 | 0 |
| Aug | 0 | 0 |
| Sep | 5 | 1 |
| Oct | 23 | 5 |
| Nov | 71 | 12 |
| Dec | 117 | 16 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Grootfontein, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.
The clearer part of the year begins around April 9 and lasts for 6.6 months, ending around October 26. The clearest month is June, when the sky is clear, mostly clear, or partly cloudy 98% of the time on average.
The cloudier part of the year begins around October 27 and lasts for 5.4 months, ending around April 8. The cloudiest month is January, when it is overcast or mostly cloudy 60% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 40 | 47 | 55 | 82 | 96 | 98 | 96 | 96 | 93 | 84 | 63 | 47 |
| Cloudier (%) | 60 | 53 | 45 | 18 | 4 | 2 | 4 | 4 | 7 | 16 | 37 | 53 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 40 | 60 |
| Feb | 47 | 53 |
| Mar | 55 | 45 |
| Apr | 82 | 18 |
| May | 96 | 4 |
| Jun | 98 | 2 |
| Jul | 96 | 4 |
| Aug | 96 | 4 |
| Sep | 93 | 7 |
| Oct | 84 | 16 |
| Nov | 63 | 37 |
| Dec | 47 | 53 |
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 12 min of light; the shortest, around June 10, only 10 h 48 min — a swing of roughly 2 h 24 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.0 | 12.7 | 12.1 | 11.6 | 11.1 | 10.8 | 10.9 | 11.3 | 11.9 | 12.5 | 12.9 | 13.2 |
| Sunrise (AM) | 6:25 | 6:42 | 6:53 | 7:01 | 7:12 | 7:23 | 7:25 | 7:12 | 6:45 | 6:19 | 6:05 | 6:09 |
| Sunset (PM) | 7:29 | 7:22 | 7:01 | 6:34 | 6:16 | 6:13 | 6:21 | 6:32 | 6:39 | 6:46 | 7:01 | 7:19 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 13.0 | 6:25 | 7:29 |
| Feb | 12.7 | 6:42 | 7:22 |
| Mar | 12.1 | 6:53 | 7:01 |
| Apr | 11.6 | 7:01 | 6:34 |
| May | 11.1 | 7:12 | 6:16 |
| Jun | 10.8 | 7:23 | 6:13 |
| Jul | 10.9 | 7:25 | 6:21 |
| Aug | 11.3 | 7:12 | 6:32 |
| Sep | 11.9 | 6:45 | 6:39 |
| Oct | 12.5 | 6:19 | 6:46 |
| Nov | 12.9 | 6:05 | 7:01 |
| Dec | 13.2 | 6:09 | 7:19 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Grootfontein averages about 18 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 7 and 29 days.
The sunnier stretch runs 6.2 months, from around Apr 11 to Oct 16. The sunniest month is June, with roughly 28 sunny days (brilliant).
The greyest month is January, down near 7 sunny days — about 76% fewer than the June peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 7 | 8 | 11 | 19 | 27 | 28 | 28 | 28 | 24 | 18 | 11 | 8 |
| Sky | Gloomy | Mixed | Mixed | Bright | Brilliant | Brilliant | Brilliant | Brilliant | Brilliant | Bright | Mixed | Gloomy |
| Sunny days | Sky | |
|---|---|---|
| Jan | 7 | Gloomy |
| Feb | 8 | Mixed |
| Mar | 11 | Mixed |
| Apr | 19 | Bright |
| May | 27 | Brilliant |
| Jun | 28 | Brilliant |
| Jul | 28 | Brilliant |
| Aug | 28 | Brilliant |
| Sep | 24 | Brilliant |
| Oct | 18 | Bright |
| Nov | 11 | Mixed |
| Dec | 8 | Gloomy |
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 Grootfontein, how humid it feels changes dramatically over the year.
The more humid part of the year lasts 4.7 months, from around November 21 to April 11. The muggiest month is February, when the air feels humid, muggy or worse about 56% of the time.
The most comfortable stretch runs from around April 12 to November 20, 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 (%) | 28 | 21 | 29 | 69 | 99 | 100 | 100 | 100 | 99 | 91 | 64 | 39 |
| Comfortable (%) | 21 | 23 | 23 | 16 | 1 | 0 | 0 | 0 | 1 | 8 | 22 | 27 |
| Humid (%) | 44 | 49 | 45 | 14 | 0 | 0 | 0 | 0 | 0 | 1 | 14 | 31 |
| Muggy (%) | 7 | 7 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| Jan | 28 | 21 | 44 | 7 |
| Feb | 21 | 23 | 49 | 7 |
| Mar | 29 | 23 | 45 | 2 |
| Apr | 69 | 16 | 14 | 0 |
| May | 99 | 1 | 0 | 0 |
| Jun | 100 | 0 | 0 | 0 |
| Jul | 100 | 0 | 0 | 0 |
| Aug | 100 | 0 | 0 | 0 |
| Sep | 99 | 1 | 0 | 0 |
| Oct | 91 | 8 | 1 | 0 |
| Nov | 64 | 22 | 14 | 0 |
| Dec | 39 | 27 | 31 | 4 |
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 Grootfontein is steady company: average speeds sit near 11 km/h — calm — 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) | 10 | 9 | 9 | 10 | 11 | 11 | 12 | 12 | 12 | 12 | 10 | 9 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 10 | calm |
| Feb | 9 | calm |
| Mar | 9 | calm |
| Apr | 10 | calm |
| May | 11 | calm |
| Jun | 11 | calm |
| Jul | 12 | calm |
| Aug | 12 | calm |
| Sep | 12 | calm |
| Oct | 12 | calm |
| Nov | 10 | calm |
| Dec | 9 | calm |
Hazard calendar for Grootfontein
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Grootfontein's rainy season runs December–March, when most of the year's rain falls.
Best time to visit Grootfontein
To characterize how pleasant the weather is in Grootfontein throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around late August, Grootfontein is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.
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 Grootfontein for general outdoor tourist activities is from mid April to late August, with a peak score in the first week of June.
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) | 4.5 | 4.8 | 5.7 | 7.6 | 9.2 | 9.6 | 9.5 | 8.9 | 6.4 | 4.7 | 4.2 | 4.2 |
| Rating | fair | fair | good | ideal | ideal | ideal | ideal | ideal | good | fair | fair | fair |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 4.5 | fair |
| Feb | 4.8 | fair |
| Mar | 5.7 | good |
| Apr | 7.6 | ideal |
| May | 9.2 | ideal |
| Jun | 9.6 | ideal |
| Jul | 9.5 | ideal |
| Aug | 8.9 | ideal |
| Sep | 6.4 | good |
| Oct | 4.7 | fair |
| Nov | 4.2 | fair |
| Dec | 4.2 | fair |
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 Grootfontein for hot-weather activities run from mid April to mid June and again from late July to mid October, with a peak score in the first 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 Grootfontein, 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 October (highs near 32°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 October, Grootfontein sees daytime highs around 32°C and nights near 18°C. Pack light clothes and sun protection. About 5 days see rain.
UV index (midday) in Grootfontein 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 Grootfontein peaks around January 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 7 (very 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 | 14 | 14 | 10 | 9 | 7 | 7 | 9 | 9 | 12 | 13 | 14 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | Very high | Very high | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 14 | Extreme |
| Mar | 14 | Extreme |
| Apr | 10 | Extreme |
| May | 9 | Very high |
| Jun | 7 | Very high |
| Jul | 7 | Very high |
| Aug | 9 | Very high |
| Sep | 9 | Very high |
| Oct | 12 | Extreme |
| Nov | 13 | Extreme |
| Dec | 14 | Extreme |
Average hourly UV index in Grootfontein
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 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 | 7.5 | 6.5 | 6 | 6 | 7 | 7 | 8 | 8.5 | 9 |
| UV ≥ 6 (h/day) | 7 | 6.5 | 6.5 | 5 | 4 | 3 | 3 | 4.5 | 5 | 6 | 6.5 | 7 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 9 | 7 |
| Feb | 8.5 | 6.5 |
| Mar | 8 | 6.5 |
| Apr | 7.5 | 5 |
| May | 6.5 | 4 |
| Jun | 6 | 3 |
| Jul | 6 | 3 |
| Aug | 7 | 4.5 |
| Sep | 7 | 5 |
| Oct | 8 | 6 |
| Nov | 8.5 | 6.5 |
| Dec | 9 | 7 |
Growing season
Grootfontein 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 | 100 | 100 | 100 | 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 | 100 | 0 |
| Jul | 100 | 0 |
| Aug | 100 | 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. Grootfontein banks about 4,158 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around October.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 432 | 372 | 391 | 329 | 263 | 170 | 168 | 270 | 383 | 475 | 450 | 454 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 432 |
| Feb | 372 |
| Mar | 391 |
| Apr | 329 |
| May | 263 |
| Jun | 170 |
| Jul | 168 |
| Aug | 270 |
| Sep | 383 |
| Oct | 475 |
| Nov | 450 |
| Dec | 454 |
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.
Grootfontein receives about 6.1 kWh/m² a day of solar energy on average — intense — with a clear seasonal swing between 4.9 and 7.3 kWh/m².
The brighter stretch of the year lasts 6.1 months, from around Aug 25 to Feb 25. The brightest month is October, averaging about 7.3 kWh/m² (intense).
The dimmest month is June, down near 4.9 kWh/m² — roughly 32% less than the October peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.5 | 6.3 | 5.8 | 5.6 | 5.3 | 4.9 | 5.1 | 5.9 | 6.8 | 7.3 | 7.1 | 6.9 |
| Level | Intense | Intense | Bright | Bright | Bright | Bright | Bright | Bright | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 6.5 | Intense |
| Feb | 6.3 | Intense |
| Mar | 5.8 | Bright |
| Apr | 5.6 | Bright |
| May | 5.3 | Bright |
| Jun | 4.9 | Bright |
| Jul | 5.1 | Bright |
| Aug | 5.9 | Bright |
| Sep | 6.8 | Intense |
| Oct | 7.3 | Intense |
| Nov | 7.1 | Intense |
| Dec | 6.9 | Intense |
Where is Grootfontein?
Grootfontein sits at 19.6°S, 18.1°E, 1,432 m above sea level, in Namibia. The nearest listed city is Tsumeb, 54 km away.
Topography around Grootfontein
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Grootfontein.
Within 3 km, the terrain around Grootfontein has only modest variations in elevation — a maximum elevation change of 86 m around an average of 1,447 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 376 m; within 80 km, large variations in elevation — a maximum elevation change of 956 m.
The land around Grootfontein is covered by shrubs (64%) within 3 km, shrubs (82%) within 16 km, and shrubs (93%) 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 Grootfontein (-19.5733°, 18.1003°, elevation 1,432 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).