Galgamuwa's climate is characterized by a gentle warming trend throughout the year, with temperatures steadily increasing from January to April before peaking in March and April. The summer months of May to September see relatively stable temperatures, ranging from 22-34°C, while October marks the beginning of a slight cooling trend. November and December bring temperatures similar to those in January, indicating a return to cooler conditions. Overall, Galgamuwa experiences a mild climate with minimal extremes, making it suitable for year-round habitation. The temperature fluctuations are relatively subtle, with an average temperature range of around 10-12°C throughout the year.