Kisumu's climate is hot and humid year-round, characteristic of tropical lakeside locations. The city's location on Lake Victoria creates a warm, humid environment with substantial annual rainfall.
Temperature
Kisumu experiences consistently high temperatures throughout the year, with average temperatures ranging from approximately 20 degrees Celsius (68 Fahrenheit) at night to 28-32 degrees Celsius (82-90 Fahrenheit) during the day. Daily temperature variation is modest.
Humidity
Humidity is characteristically high due to Kisumu's lakeside location. Humidity levels often exceed 70 percent, creating sticky, uncomfortable conditions, particularly during the warmest hours.
Rainfall Patterns
Kisumu receives substantial rainfall distributed across two seasons: the long rains (March-May) and the short rains (October-December). Annual rainfall is approximately 1,500 to 2,000 millimeters (59 to 79 inches).
Seasonal Variation
Seasons are primarily distinguished by rainfall patterns rather than temperature variation. The rainy seasons bring cloudier weather and reduced sunshine. The dry seasons (June-September and January-February) are sunnier and slightly cooler.
Lake Victoria Influence
Lake Victoria moderates climate and influences local weather patterns. The large water body affects wind patterns, moisture, and local rainfall.
Malaria Risk
The warm, humid climate and standing water near the lake create ideal conditions for mosquito breeding. Malaria is endemic and remains a significant health concern, particularly during and after rainy seasons.
Heat Stress
The consistent heat and humidity create heat stress challenges, particularly for physical laborers. Dehydration and heat-related illness are concerns.
Agricultural Impact
The rainfall and humidity support agricultural production, particularly in surrounding areas. However, flooding during heavy rains can damage crops and infrastructure.
Climate Change Impacts
Climate change is altering Kisumu's rainfall patterns, creating uncertainty in water availability for agriculture and domestic use. Changing patterns affect farming livelihoods.
Seasonal Living
Kisumu residents adapt their activities to seasonal patterns, with adjustments to clothing, work schedules, and social activities depending on rainfall and temperature.
See Also
Kisumu Timeline Kisumu Founding Lake Victoria Kisumu Luo Kisumu Economy Kisumu Port