Kasulu in Summer
In summer (December, January and February), Kasulu sees average daytime highs around 25°C and overnight lows near 17°C, with 682 mm of rain over about 82 wet days across the season. It is the coldest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 25°C. The sky is clear or mostly clear about 3% of the time across summer, and the air most often feels humid.
Summer is Kasulu's weakest season of the year to visit on our travel score. For the whole year in context, see Kasulu's year-round climate.
- Avg daytime high
- 25°C
- coldest season of the year
- Avg overnight low
- 17°C
- Rainfall
- 682 mm
- 82 wet days
- Avg wind
- 4 km/h
- Travel score
- 3.9
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Kasulu in Summer
Across summer, daytime highs hold fairly steady around 25°C.
A typical summer day in Kasulu reaches about 25°C and drops to 17°C overnight. The warmest of the three months is February, the coolest December.
Kasulu 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 | 25° / 17° | 235 | 28.3 | 12.2 | 3.8 |
| Feb | 26° / 17° | 189 | 24.3 | 12.1 | 4.0 |
| Mar | 26° / 17° | 214 | 27.3 | 12 | 4.0 |
| Apr | 25° / 17° | 172 | 23.7 | 11.9 | 4.3 |
| May | 26° / 17° | 68 | 11.1 | 11.8 | 6.4 |
| Jun | 27° / 16° | 14 | 3 | 11.7 | 7.6 |
| Jul | 27° / 16° | 3 | 0.8 | 11.8 | 7.9 |
| Aug | 29° / 17° | 11 | 1.8 | 11.9 | 6.8 |
| Sep | 29° / 18° | 36 | 6.4 | 12 | 5.7 |
| Oct | 28° / 18° | 136 | 17 | 12.1 | 4.9 |
| Nov | 26° / 17° | 231 | 25.5 | 12.2 | 4.0 |
| Dec | 25° / 17° | 257 | 28.9 | 12.3 | 3.8 |
Cloud cover in Summer
The sky is clear or mostly clear about 3% of the time across summer.
Chance of precipitation in Summer
Kasulu gets around 682 mm of rain over 82 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 4 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 12 min in early December to 12 h 06 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 5.3 kWh/m².
Hazard calendar for Kasulu
In summer, Kasulu overlaps its cyclone and rainy season season. The full year is below, with each hazard's peak months called out.
Kasulu sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Kasulu's rainy season runs October–April, when most of the year's rain falls.
Is summer a good time to visit Kasulu?
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 Kasulu.
What to pack for Kasulu in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Kasulu sees daytime highs around 25°C and nights near 17°C. Pack rain gear. Worth having: light clothes and sun protection. About 82 days see rain.
UV index in Kasulu in Summer
Clear-sky midday UV across summer averages around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Kasulu peaks around March 14 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near August 14 at about 8 (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) | 10 | 15 | 16 | 15 | 12 | 10 | 11 | 8 | 13 | 14 | 13 | 12 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Extreme | Very high | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Extreme |
| Feb | 15 | Extreme |
| Mar | 16 | Extreme |
| Apr | 15 | Extreme |
| May | 12 | Extreme |
| Jun | 10 | Very high |
| Jul | 11 | Extreme |
| Aug | 8 | Very high |
| Sep | 13 | Extreme |
| Oct | 14 | Extreme |
| Nov | 13 | Extreme |
| Dec | 12 | Extreme |
Air quality in Kasulu 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 Kasulu is worst in July — around 47 µg/m³ PM2.5 (poor), about 3.3× the cleanest month (April, 14 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) | 20 | 20 | 17 | 14 | 18 | 35 | 47 | 43 | 36 | 23 | 17 | 16 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Poor | Poor | Poor | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 20 | Moderate |
| Feb | 20 | Moderate |
| Mar | 17 | Moderate |
| Apr | 14 | Moderate |
| May | 18 | Moderate |
| Jun | 35 | Moderate |
| Jul | 47 | Poor |
| Aug | 43 | Poor |
| Sep | 36 | Poor |
| Oct | 23 | Moderate |
| Nov | 17 | Moderate |
| Dec | 16 | Moderate |
Where is Kasulu?
Kasulu sits at 4.6°S, 30.1°E, 1,310 m above sea level, in Tanzania. The nearest listed city is Mwandiga, 57 km away.
Topography around Kasulu
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Kasulu.
Within 3 km, the terrain around Kasulu has significant variations in elevation — a maximum elevation change of 288 m around an average of 1,320 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 629 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,720 m.
The land around Kasulu is covered by artificial surfaces (29%), cropland (27%) and trees (21%) within 3 km, grassland (49%) and cropland (28%) within 16 km, and grassland (35%), cropland (22%) and trees (21%) 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 Kasulu (-4.5767°, 30.1025°, elevation 1,310 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.