Kasulu climate
Kasulu (Tanzania) has a tropical savanna (dry winter) climate (Köppen Aw). The average temperature over the year is 22 °C71 °F, and about 1,167 mm46 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Kasulu climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 2678 | 1762 | 2170 | 1746.9 |
| Feb | 2679 | 1762 | 2271 | 1335.2 |
| Mar | 2679 | 1762 | 2271 | 1546.1 |
| Apr | 2678 | 1762 | 2170 | 1485.8 |
| May | 2679 | 1660 | 2170 | 532.1 |
| Jun | 2780 | 1457 | 2068 | 70.3 |
| Jul | 2781 | 1355 | 2068 | 50.2 |
| Aug | 2984 | 1559 | 2271 | 120.5 |
| Sep | 3086 | 1763 | 2475 | 301.2 |
| Oct | 2985 | 1864 | 2374 | 793.1 |
| Nov | 2680 | 1763 | 2271 | 1967.7 |
| Dec | 2678 | 1762 | 2170 | 1777.0 |
| Year | 3086 | 1355 | 2271 | 1,16746 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 80% | 83% | 5.1 | 12:21 |
| Feb | 79% | 79% | 5.5 | 12:16 |
| Mar | 80% | 80% | 5.4 | 12:08 |
| Apr | 82% | 80% | 5.3 | 12:01 |
| May | 76% | 62% | 5.4 | 11:55 |
| Jun | 68% | 40% | 5.6 | 11:51 |
| Jul | 62% | 30% | 5.8 | 11:53 |
| Aug | 56% | 41% | 5.9 | 11:58 |
| Sep | 55% | 57% | 6.0 | 12:05 |
| Oct | 63% | 76% | 5.6 | 12:13 |
| Nov | 77% | 84% | 5.0 | 12:20 |
| Dec | 80% | 84% | 4.8 | 12:23 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Kasulu is like
The warmest month is September, with an average high of 30 °C86 °F and a low of 17 °C63 °F. The coldest is July, when highs average 27 °C81 °F and lows 13 °C55 °F. Seasonal differences are small — just 3.6 °C6.6 °F between the warmest and the coolest month.
It is wet, with about 1,167 mm46 in of precipitation per year. The wettest three-month stretch is November–January, which brings 47% of the annual total. Months with less than 20 mm0.8 in on average: June–August. The wettest month is November (196 mm7.7 in), the driest is July (5 mm0.2 in).
Relative humidity ranges from 55% in September to 82% in April. The clearest skies (lowest average cloud amount, 30%) are typical of July. Average wind speed near the ground ranges from 1 km/h (1 mph) in December to 4 km/h (2 mph) in August.
Best time to visit Kasulu
Based on these averages, the most comfortable months for sightseeing and outdoor activities are May–August: average highs of 26 °C79 °F to 29 °C84 °F with 5 mm0.2 in to 53 mm2.1 in of precipitation per month.
The most challenging month is November, which is very wet (196 mm7.7 in) and humid (77% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Kasulu
- Wetter months (November–April) — highs around 26 °C78 °F, lows around 17 °C62 °F, about 164 mm6.4 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
- Drier months (May–October) — highs 2679 to 30 °C86 °F, lows 1355 to 18 °C64 °F, about 31 mm1.2 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
How Kasulu compares
Compared with Bujumbura, about 156 km to the northwest, Kasulu is on average 4 °C7.3 °F cooler and receives 35% less precipitation (1,167 mm46 in vs 1,808 mm71 in). The difference is largest in February (4.6 °C8.2 °F cooler).
Of the 34 places in Tanzania covered by World Climates, Kasulu is the 25th warmest by annual mean temperature and the 15th wettest by annual precipitation. See all of them on the Tanzania climate page.
Places in other countries with the most similar temperature and rainfall pattern: Valparaíso de Goiás (Brazil, Aw), Gama (Brazil, Aw) and Brasília (Brazil, Aw).
Nearby places
- Kigoma 62 km · 26 °C79 °F · 1,183 mm47 in
- Gitega 129 km · 19 °C66 °F · 1,339 mm53 in
- Bujumbura 156 km · 26 °C78 °F · 1,808 mm71 in
- Kalemie 183 km · 26 °C79 °F · 1,143 mm45 in
- Mpanda 224 km · 23 °C74 °F · 1,008 mm40 in
- Bukavu 271 km · 20 °C68 °F · 1,705 mm67 in
- Kahama 289 km · 23 °C73 °F · 1,003 mm39 in
- Kigali 292 km · 20 °C68 °F · 1,291 mm51 in
Frequently asked questions
What is the warmest month in Kasulu?
September is the warmest month in Kasulu, with an average high of 30 °C (86 °F) and an average low of 17 °C (63 °F).
What is the coldest month in Kasulu?
July is the coldest month, with an average high of 27 °C (81 °F) and an average low of 13 °C (55 °F).
When does it rain the most in Kasulu?
November is the wettest month with about 196 mm (7.7 in) of precipitation; July is the driest with about 5 mm (0.2 in).
What is the best time to visit Kasulu?
Judging by long-term averages, the most comfortable months are May–August.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.