Climate Insights for Kertosono

The climate in Kertosono is hot. The average annual temperature is 26°C and approximately 97mm of precipitation falls per year. January is the wettest month, receiving around 33mm of rainfall. Kertosono sits near the equator, so seasonal temperature differences are minimal throughout the year.

Temperatures in Kertosono vary considerably across the year, with a 27°C difference between the coldest and warmest months. August is the hottest month, with daytime highs reaching 44°C and an average of 38°C. June is the coolest month, with minimum temperatures around 17°C and an average of 21°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows. The sharpest temperature change occurs between June and July, with a 9°C shift in average temperatures.

Kertosono is a quite dry location, receiving approximately 97mm of precipitation annually, which averages out to around 8mm per month. The wettest month is January, averaging 33mm of rainfall. June and April also tend to see above-average precipitation. The driest month is July, with just 0mm. That's 33mm less than January, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Kertosono is relatively calm, with an average annual wind speed of 6km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is May, averaging 8km/h, though still comfortable for most outdoor activities. The calmest conditions occur in February, with average winds dropping to 4km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 4km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans.

It is currently winter in Kertosono, which began on June 21, 2026. Kertosono sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in August at around 44°C, while the coldest stretch bottoms out in June near 17°C. Spring is next, beginning on September 23, 2026 — 22 days from now.

The best time to visit Kertosono is during January, February, March, April, May, June and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 14mm per month. By contrast, August can be uncomfortably hot with temperatures reaching 44°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Kertosono based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.