Isiro climate
Isiro (DR Congo) has a tropical monsoon climate (Köppen Am). The average temperature over the year is 23 °C74 °F, and about 1,959 mm77 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Isiro climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 2984 | 1864 | 2374 | 381.5 |
| Feb | 3087 | 1966 | 2576 | 652.5 |
| Mar | 2883 | 2068 | 2475 | 1706.7 |
| Apr | 2780 | 2068 | 2374 | 2439.5 |
| May | 2679 | 2068 | 2374 | 2238.8 |
| Jun | 2679 | 1967 | 2373 | 1777.0 |
| Jul | 2679 | 1966 | 2373 | 1596.2 |
| Aug | 2679 | 1966 | 2373 | 2017.9 |
| Sep | 2679 | 1967 | 2373 | 2168.5 |
| Oct | 2678 | 2067 | 2373 | 25710 |
| Nov | 2679 | 1967 | 2373 | 1616.3 |
| Dec | 2882 | 1865 | 2373 | 522.0 |
| Year | 3087 | 1864 | 2374 | 1,95977 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 73% | 70% | 5.6 | 11:59 |
| Feb | 73% | 78% | 5.6 | 12:02 |
| Mar | 83% | 84% | 5.5 | 12:06 |
| Apr | 89% | 84% | 5.4 | 12:10 |
| May | 90% | 82% | 5.3 | 12:15 |
| Jun | 89% | 86% | 4.5 | 12:17 |
| Jul | 88% | 85% | 4.4 | 12:16 |
| Aug | 88% | 85% | 4.6 | 12:12 |
| Sep | 89% | 83% | 5.3 | 12:08 |
| Oct | 91% | 85% | 5.1 | 12:03 |
| Nov | 89% | 80% | 5.1 | 11:59 |
| Dec | 81% | 71% | 5.3 | 11:58 |
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 Isiro is like
The warmest month is February, with an average high of 30 °C87 °F and a low of 19 °C66 °F. The coldest is August, when highs average 26 °C79 °F and lows 19 °C66 °F. Temperatures barely change through the year: the warmest and the coolest month differ by only 2.1 °C3.7 °F.
It is wet, with about 1,959 mm77 in of precipitation per year. The wettest three-month stretch is August–October, which brings 34% of the annual total. The wettest month is October (257 mm10 in), the driest is January (38 mm1.5 in).
Relative humidity ranges from 73% in February to 91% in October. The clearest skies (lowest average cloud amount, 70%) are typical of January. Average wind speed near the ground ranges from 0 km/h (0 mph) in March to 1 km/h (0 mph) in January.
Best time to visit Isiro
Based on these averages, the most comfortable months for sightseeing and outdoor activities are December and January: average highs of 28 °C82 °F to 29 °C84 °F with 38 mm1.5 in to 52 mm2.0 in of precipitation per month.
The most challenging month is October, which is very wet (257 mm10 in) and humid (91% 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 Isiro
- Wetter months (March–June, August–October) — highs 2678 to 28 °C83 °F, lows 1966 to 20 °C68 °F, about 212 mm8.4 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and a good rain jacket or umbrella and quick-drying shoes.
- Drier months (November–February, July) — highs 2679 to 30 °C87 °F, lows 1864 to 19 °C67 °F, about 95 mm3.7 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
How Isiro compares
Compared with Bunia, about 323 km to the southeast, Isiro is on average 1.1 °C2 °F warmer and receives 74% more precipitation (1,959 mm77 in vs 1,128 mm44 in). The difference is largest in November (1.8 °C3.3 °F warmer).
Of the 36 places in the DR Congo covered by World Climates, Isiro is the 26th warmest by annual mean temperature and the wettest by annual precipitation. See all of them on the DR Congo climate page.
Places in other countries with the most similar temperature and rainfall pattern: Mbale (Uganda, Am), Ébolowa (Cameroon, Aw) and Yaoundé (Cameroon, Aw).
Nearby places
- Bakwa 152 km · 25 °C76 °F · 1,593 mm63 in
- Bunia 323 km · 22 °C71 °F · 1,128 mm44 in
- Beni 327 km · 22 °C72 °F · 1,585 mm62 in
- Butembo 347 km · 19 °C66 °F · 1,532 mm60 in
- Kisangani 368 km · 25 °C78 °F · 1,587 mm62 in
- Yei 370 km · 26 °C78 °F · 1,164 mm46 in
- Kasese 398 km · 24 °C76 °F · 1,198 mm47 in
- Hoima 441 km · 24 °C75 °F · 1,063 mm42 in
Frequently asked questions
What is the warmest month in Isiro?
February is the warmest month in Isiro, with an average high of 30 °C (87 °F) and an average low of 19 °C (66 °F).
What is the coldest month in Isiro?
August is the coldest month, with an average high of 26 °C (79 °F) and an average low of 19 °C (66 °F).
When does it rain the most in Isiro?
October is the wettest month with about 257 mm (10.1 in) of precipitation; January is the driest with about 38 mm (1.5 in).
What is the best time to visit Isiro?
Judging by long-term averages, the most comfortable months are December and January.
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.