Kasulu in Spring
In spring (September, October and November), Kasulu sees average daytime highs around 28°C and overnight lows near 18°C, with 402 mm of rain over about 49 wet days across the season. It is the warmest season of the year and the 3rd-wettest season.
Over the season highs ease from about 29°C in early September to 25°C by late November. The sky is clear or mostly clear about 10% of the time across spring, and the air most often feels humid.
Spring is Kasulu's 3rd-best season to visit on our travel score. For the whole year in context, see Kasulu's year-round climate.
- Avg daytime high
- 28°C
- warmest season of the year
- Avg overnight low
- 18°C
- Rainfall
- 402 mm
- 49 wet days
- Avg wind
- 6 km/h
- Travel score
- 4.9
- 3rd-best season
- Months
- Sep · Oct · Nov
Temperature in Kasulu in Spring
Over the season highs ease from about 29°C in early September to 25°C by late November.
A typical spring day in Kasulu reaches about 28°C and drops to 18°C overnight. The warmest of the three months is September, the coolest November.
Kasulu weather by month
How the three spring months (September, October and November) 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 Spring
The sky is clear or mostly clear about 10% of the time across spring.
Chance of precipitation in Spring
Kasulu gets around 402 mm of rain over 49 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 6 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 54 min in early September to 12 h 12 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 5.7 kWh/m².
Hazard calendar for Kasulu
In spring, 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 spring a good time to visit Kasulu?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is a reasonable time to visit Kasulu for sightseeing.
What to pack for Kasulu in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Kasulu sees daytime highs around 28°C and nights near 18°C. Pack light clothes, rain gear and sun protection. About 49 days see rain.
UV index in Kasulu in Spring
Clear-sky midday UV across spring 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 Spring
Average fine-particle pollution (PM2.5) through the year — so you can see where spring 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.