Climate and average weather in Njombe
In Njombe, the weather is warm, wet, and partly cloudy and remarkably steady, with daytime highs holding near warm levels all year. The wettest stretch peaks around January.
Over the course of the year, the temperature in Njombe typically varies from 9°C to 24°C, and is rarely below 7°C or above 26°C. November is the hottest month of the year, while July is the coldest.
Based on the travel score, the best time of year to visit Njombe for warm-weather activities is from mid May to mid November.
- Hottest
- Nov
- 24°
- Coldest
- Jul
- 9°
- Wettest
- Jan
- 268 mm
- Driest
- Jul
- 2 mm
- Rain / yr
- 1112 mm
- 141 wet days
- Daylight
- 11.5–12.5 h
- shortest–longest
- Elevation
- 1,960 m
- 9.3°S
- Clearest
- Sep
- 43% cloud
Njombe is town in Njombe Region, Tanzania.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Njombe 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 May to mid November.
Temperature through the year
Daily average highs and lows in Njombe, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
Temperatures in Njombe stay fairly even through the year, without a distinct hot or cool season. The warmest month is November, with an average high of 24°C and low of 14°C; the coolest is July, with an average low of 9°C and high of 19°C.
Days typically run about 9°C warmer than nights, with the widest day–night swing (around 11°C) in September.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 23 | 23 | 22 | 21 | 21 | 20 | 19 | 20 | 22 | 24 | 24 | 23 |
| Avg low (°C) | 15 | 15 | 15 | 14 | 12 | 10 | 9 | 10 | 11 | 13 | 14 | 15 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 23 | 15 |
| Feb | 23 | 15 |
| Mar | 22 | 15 |
| Apr | 21 | 14 |
| May | 21 | 12 |
| Jun | 20 | 10 |
| Jul | 19 | 9 |
| Aug | 20 | 10 |
| Sep | 22 | 11 |
| Oct | 24 | 13 |
| Nov | 24 | 14 |
| Dec | 23 | 15 |
Average hourly temperature in Njombe
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 November afternoons, near 24°C, and coldest before dawn in July, near 9°C.
Njombe 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 | 23° / 15° | 268 | 26.5 | 12.5 | 4.1 |
| Feb | 23° / 15° | 260 | 23.6 | 12.3 | 4.1 |
| Mar | 22° / 15° | 228 | 27.2 | 12.1 | 4.0 |
| Apr | 21° / 14° | 83 | 18.6 | 11.8 | 5.1 |
| May | 21° / 12° | 18 | 5.4 | 11.6 | 7.1 |
| Jun | 20° / 10° | 3 | 0.8 | 11.5 | 7.7 |
| Jul | 19° / 9° | 2 | 0.4 | 11.5 | 7.7 |
| Aug | 20° / 10° | 4 | 0.9 | 11.7 | 7.9 |
| Sep | 22° / 11° | 4 | 0.9 | 11.9 | 8.3 |
| Oct | 24° / 13° | 18 | 5.5 | 12.2 | 7.8 |
| Nov | 24° / 14° | 54 | 10.5 | 12.4 | 6.8 |
| Dec | 23° / 15° | 171 | 20.8 | 12.5 | 5.0 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Njombe gets about 1112 mm of precipitation a year. On a typical day the chance of rain is often wet, but that rises and falls sharply with the seasons.
The wetter season lasts 5.2 months, from around Nov 21 to Apr 27, peaking in March at about 88% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 13.
January is the wettest month by volume, with 268 mm over about 27 wet days; July is the driest, with 2 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 85 | 85 | 87 | 62 | 18 | 3 | 2 | 3 | 4 | 17 | 36 | 67 |
| Rain days | 27 | 24 | 27 | 19 | 5 | 1 | 0 | 1 | 1 | 6 | 11 | 21 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 85 | 27 |
| Feb | 85 | 24 |
| Mar | 87 | 27 |
| Apr | 62 | 19 |
| May | 18 | 5 |
| Jun | 3 | 1 |
| Jul | 2 | 0 |
| Aug | 3 | 1 |
| Sep | 4 | 1 |
| Oct | 17 | 6 |
| Nov | 36 | 11 |
| Dec | 67 | 21 |
Monthly rainfall
Over a full year, Njombe collects about 1112 mm of rain across 141 wet days — roughly 93 mm in an average month.
It doesn’t fall evenly. January is the wettest month with 268 mm, while July is the driest at just 2 mm. The three wettest months alone bring about 68% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 268 | 260 | 228 | 83 | 18 | 3 | 2 | 4 | 4 | 18 | 54 | 171 |
| Rain days | 27 | 24 | 27 | 19 | 5 | 1 | 0 | 1 | 1 | 6 | 11 | 21 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 268 | 27 |
| Feb | 260 | 24 |
| Mar | 228 | 27 |
| Apr | 83 | 19 |
| May | 18 | 5 |
| Jun | 3 | 1 |
| Jul | 2 | 0 |
| Aug | 4 | 1 |
| Sep | 4 | 1 |
| Oct | 18 | 6 |
| Nov | 54 | 11 |
| Dec | 171 | 21 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Njombe, 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 May 7 and lasts for 6.7 months, ending around November 26. The clearest month is September, when the sky is clear, mostly clear, or partly cloudy 72% of the time on average.
The cloudier part of the year begins around November 27 and lasts for 5.3 months, ending around May 6. The cloudiest month is February, when it is overcast or mostly cloudy 89% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 12 | 11 | 16 | 27 | 48 | 60 | 62 | 64 | 72 | 63 | 48 | 28 |
| Cloudier (%) | 88 | 89 | 84 | 73 | 52 | 40 | 38 | 36 | 28 | 37 | 52 | 72 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 12 | 88 |
| Feb | 11 | 89 |
| Mar | 16 | 84 |
| Apr | 27 | 73 |
| May | 48 | 52 |
| Jun | 60 | 40 |
| Jul | 62 | 38 |
| Aug | 64 | 36 |
| Sep | 72 | 28 |
| Oct | 63 | 37 |
| Nov | 48 | 52 |
| Dec | 28 | 72 |
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 12 h 30 min of light; the shortest, around May 21, only 11 h 30 min — a swing of roughly 1 hour.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.5 | 12.3 | 12.1 | 11.8 | 11.6 | 11.5 | 11.5 | 11.7 | 11.9 | 12.2 | 12.4 | 12.5 |
| Sunrise (AM) | 6:35 | 6:46 | 6:49 | 6:47 | 6:50 | 6:57 | 7:01 | 6:54 | 6:37 | 6:20 | 6:13 | 6:21 |
| Sunset (PM) | 7:05 | 7:05 | 6:52 | 6:35 | 6:24 | 6:25 | 6:32 | 6:36 | 6:34 | 6:32 | 6:39 | 6:53 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 12.5 | 6:35 | 7:05 |
| Feb | 12.3 | 6:46 | 7:05 |
| Mar | 12.1 | 6:49 | 6:52 |
| Apr | 11.8 | 6:47 | 6:35 |
| May | 11.6 | 6:50 | 6:24 |
| Jun | 11.5 | 6:57 | 6:25 |
| Jul | 11.5 | 7:01 | 6:32 |
| Aug | 11.7 | 6:54 | 6:36 |
| Sep | 11.9 | 6:37 | 6:34 |
| Oct | 12.2 | 6:20 | 6:32 |
| Nov | 12.4 | 6:13 | 6:39 |
| Dec | 12.5 | 6:21 | 6:53 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Njombe averages about 7 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 1 and 15 days.
The sunnier stretch runs 6.2 months, from around May 20 to Nov 25. The sunniest month is September, with roughly 14 sunny days (mixed).
The greyest month is April, down near 1 sunny days — about 89% fewer than the September peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 1 | 1 | 1 | 1 | 6 | 11 | 12 | 13 | 14 | 11 | 8 | 4 |
| Sky | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Mixed | Mixed | Mixed | Mixed | Mixed | Mixed | Gloomy |
| Sunny days | Sky | |
|---|---|---|
| Jan | 1 | Gloomy |
| Feb | 1 | Gloomy |
| Mar | 1 | Gloomy |
| Apr | 1 | Gloomy |
| May | 6 | Gloomy |
| Jun | 11 | Mixed |
| Jul | 12 | Mixed |
| Aug | 13 | Mixed |
| Sep | 14 | Mixed |
| Oct | 11 | Mixed |
| Nov | 8 | Mixed |
| Dec | 4 | 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 Njombe, how humid it feels changes noticeably over the year.
The more humid part of the year lasts 4.4 months, from around December 8 to April 21. The muggiest month is March, when the air feels humid, muggy or worse about 27% of the time.
The most comfortable stretch runs from around April 22 to December 7, and June 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 (%) | 4 | 2 | 1 | 13 | 65 | 98 | 100 | 100 | 99 | 84 | 51 | 16 |
| Comfortable (%) | 79 | 76 | 72 | 75 | 34 | 2 | 0 | 0 | 1 | 16 | 47 | 74 |
| Humid (%) | 18 | 22 | 27 | 13 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 9 |
| Dry (%) | Comfortable (%) | Humid (%) | |
|---|---|---|---|
| Jan | 4 | 79 | 18 |
| Feb | 2 | 76 | 22 |
| Mar | 1 | 72 | 27 |
| Apr | 13 | 75 | 13 |
| May | 65 | 34 | 0 |
| Jun | 98 | 2 | 0 |
| Jul | 100 | 0 | 0 |
| Aug | 100 | 0 | 0 |
| Sep | 99 | 1 | 0 |
| Oct | 84 | 16 | 0 |
| Nov | 51 | 47 | 2 |
| Dec | 16 | 74 | 9 |
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.
Across the year, average wind speed in Njombe is typically calm, near 10 km/h, and varies moderately with the seasons.
The windier part of the year lasts 7.5 months, from around Apr 6 to Nov 18. The windiest month is July, averaging about 13 km/h (light breeze).
The calmer part of the year runs from around Nov 19 to Apr 5, with February the calmest month at about 6 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 6 | 6 | 8 | 11 | 12 | 12 | 13 | 13 | 13 | 12 | 11 | 8 |
| Feels | calm | calm | calm | calm | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 6 | calm |
| Feb | 6 | calm |
| Mar | 8 | calm |
| Apr | 11 | calm |
| May | 12 | light breeze |
| Jun | 12 | light breeze |
| Jul | 13 | light breeze |
| Aug | 13 | light breeze |
| Sep | 13 | light breeze |
| Oct | 12 | light breeze |
| Nov | 11 | calm |
| Dec | 8 | calm |
Hazard calendar for Njombe
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Njombe's monsoon runs December–March, when most of the year's rain falls.
Best time to visit Njombe
To characterize how pleasant the weather is in Njombe throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around late May, Njombe 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 Njombe for general outdoor tourist activities is from mid May to mid November, with a peak score in the third week of September.
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) | 4.1 | 4.1 | 4.0 | 5.1 | 7.1 | 7.7 | 7.7 | 7.9 | 8.3 | 7.8 | 6.8 | 5.1 |
| Rating | fair | fair | fair | fair | good | ideal | ideal | ideal | ideal | ideal | good | fair |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 4.1 | fair |
| Feb | 4.1 | fair |
| Mar | 4.0 | fair |
| Apr | 5.1 | fair |
| May | 7.1 | good |
| Jun | 7.7 | ideal |
| Jul | 7.7 | ideal |
| Aug | 7.9 | ideal |
| Sep | 8.3 | ideal |
| Oct | 7.8 | ideal |
| Nov | 6.8 | good |
| Dec | 5.1 | fair |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Njombe for hot-weather activities is from late August to late November, with a peak score in the third week of October.
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 Njombe, 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.
Njombe packs about the same all year — highs hold near 24°C. Across the year the things worth having are light clothes, rain gear and sun protection.
In November, Njombe sees daytime highs around 24°C and nights near 14°C. Pack sun protection. Worth having: light clothes and rain gear. About 11 days see rain.
UV index (midday) in Njombe 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 Njombe peaks around February 22 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 15 at about 10 (extreme).
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 | 16 | 16 | 15 | 11 | 10 | 11 | 12 | 13 | 15 | 14 | 14 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 16 | Extreme |
| Feb | 16 | Extreme |
| Mar | 16 | Extreme |
| Apr | 15 | Extreme |
| May | 11 | Extreme |
| Jun | 10 | Extreme |
| Jul | 11 | Extreme |
| Aug | 12 | Extreme |
| Sep | 13 | Extreme |
| Oct | 15 | Extreme |
| Nov | 14 | Extreme |
| Dec | 14 | Extreme |
Average hourly UV index in Njombe
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 February the burn window is concentrated in the middle of the day: about 8.5 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) | 8.5 | 8.5 | 8.5 | 8 | 7.5 | 7 | 7.5 | 7.5 | 8 | 8.5 | 8.5 | 8.5 |
| UV ≥ 6 (h/day) | 7 | 7 | 7 | 6.5 | 5.5 | 5 | 5.5 | 6 | 6 | 6.5 | 6.5 | 6.5 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 8.5 | 7 |
| Feb | 8.5 | 7 |
| Mar | 8.5 | 7 |
| Apr | 8 | 6.5 |
| May | 7.5 | 5.5 |
| Jun | 7 | 5 |
| Jul | 7.5 | 5.5 |
| Aug | 7.5 | 6 |
| Sep | 8 | 6 |
| Oct | 8.5 | 6.5 |
| Nov | 8.5 | 6.5 |
| Dec | 8.5 | 6.5 |
Air quality in Njombe 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 Njombe is worst in October — around 21 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (May, 7 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) | 11 | 11 | 10 | 8 | 7 | 8 | 11 | 14 | 17 | 21 | 17 | 10 |
| Level | Good | Good | Good | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 11 | Good |
| Mar | 10 | Good |
| Apr | 8 | Good |
| May | 7 | Good |
| Jun | 8 | Good |
| Jul | 11 | Good |
| Aug | 14 | Moderate |
| Sep | 17 | Moderate |
| Oct | 21 | Moderate |
| Nov | 17 | Moderate |
| Dec | 10 | Good |
Growing season
Njombe 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. Njombe banks about 2,660 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around November.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 273 | 247 | 267 | 237 | 203 | 146 | 131 | 163 | 199 | 251 | 269 | 276 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 273 |
| Feb | 247 |
| Mar | 267 |
| Apr | 237 |
| May | 203 |
| Jun | 146 |
| Jul | 131 |
| Aug | 163 |
| Sep | 199 |
| Oct | 251 |
| Nov | 269 |
| Dec | 276 |
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.
Njombe receives about 5.4 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 4.7 and 6.7 kWh/m².
The brighter stretch of the year lasts 4.0 months, from around Aug 15 to Dec 15. The brightest month is October, averaging about 6.6 kWh/m² (intense).
The dimmest month is April, down near 4.7 kWh/m² — roughly 29% less than the October peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.1 | 5.2 | 5.0 | 4.7 | 4.8 | 4.8 | 4.9 | 5.4 | 6.3 | 6.7 | 6.3 | 5.4 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Intense | Intense | Intense | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 5.1 | Bright |
| Feb | 5.2 | Bright |
| Mar | 5.0 | Bright |
| Apr | 4.7 | Bright |
| May | 4.8 | Bright |
| Jun | 4.8 | Bright |
| Jul | 4.9 | Bright |
| Aug | 5.4 | Bright |
| Sep | 6.3 | Intense |
| Oct | 6.7 | Intense |
| Nov | 6.3 | Intense |
| Dec | 5.4 | Bright |
Where is Njombe?
Njombe sits at 9.3°S, 34.8°E, 1,960 m above sea level, in Tanzania. The nearest listed city is Mtwango, 37 km away.
Topography around Njombe
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Njombe.
Within 3 km, the terrain around Njombe has only modest variations in elevation — a maximum elevation change of 221 m around an average of 1,902 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 563 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,440 m.
The land around Njombe is covered by artificial surfaces (31%) and cropland (24%) within 3 km, trees (30%), grassland (28%) and shrubs (21%) within 16 km, and shrubs (32%), trees (31%) and grassland (20%) within 80 km.
Tanzania travel facts
- Travel advisory
- Level 3
- Reconsider Travel
- Power plugs
- Type D / G
- 230 V · 50 Hz
- Prices
- ≈ 29% of US
- price level, 2025
- GDP per capita
- $1,319
- 2025
- Happiness
- 3.9 / 10
- World Happiness, 2025
- Safe drinking water
- 31%
- of population, 2024
- Homicide rate
- 3.7
- per 100k, 2020
- Road deaths
- 31.1
- per 100k/yr, 2019
- Income group
- Lower middle
- World Bank
- English
- Low
- EF EPI 479
- 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 Njombe (-9.3492°, 34.7717°, elevation 1,960 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).