Njombe in Summer
In summer (December, January and February), Njombe sees average daytime highs around 23°C and overnight lows near 15°C, with 699 mm of rain over about 71 wet days across the season. It is the 2nd-warmest season and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 23°C. The sky is clear or mostly clear about 8% of the time across summer, and the air most often feels comfortable.
Summer is Njombe's weakest season of the year to visit on our travel score. For the whole year in context, see Njombe's year-round climate.
- Avg daytime high
- 23°C
- 2nd-warmest season
- Avg overnight low
- 15°C
- Rainfall
- 699 mm
- 71 wet days
- Avg wind
- 7 km/h
- Travel score
- 4.4
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Njombe in Summer
Across summer, daytime highs hold fairly steady around 23°C.
A typical summer day in Njombe reaches about 23°C and drops to 15°C overnight. The warmest of the three months is December, the coolest December.
Njombe 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 | 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 |
Cloud cover in Summer
The sky is clear or mostly clear about 8% of the time across summer.
Chance of precipitation in Summer
Njombe gets around 699 mm of rain over 71 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 7 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 30 min in early December to 12 h 12 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 5.2 kWh/m².
Hazard calendar for Njombe
In summer, Njombe overlaps its monsoon season. The full year is below, with each hazard's peak months called out.
Njombe's monsoon runs December–March, when most of the year's rain falls.
Is summer a good time to visit Njombe?
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 reasonable time to visit Njombe for sightseeing.
What to pack for Njombe in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Njombe sees daytime highs around 23°C and nights near 15°C. Pack rain gear. Worth having: light clothes and sun protection. About 71 days see rain.
UV index in Njombe 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 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 |
Air quality in Njombe 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 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 |
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.