Climate Insights for Trenggalek

The climate in Trenggalek is warm and mild. The average annual temperature is 25°C and approximately 137mm of precipitation falls per year. December is the wettest month, receiving around 33mm of rainfall. Trenggalek sits near the equator, so seasonal temperature differences are minimal throughout the year.

Trenggalek sees moderate temperature variation throughout the year, ranging from 16°C to 35°C. June is the hottest month, with daytime highs reaching 35°C and an average of 31°C. March is the coolest month, with minimum temperatures around 16°C and an average of 17°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between March and April, with a 7°C shift in average temperatures.

Trenggalek is a quite dry location, receiving approximately 137mm of precipitation annually, which averages out to around 11mm per month. The wettest month is August, averaging 33mm of rainfall. November and December also tend to see above-average precipitation. The driest month is June, with just 0mm. That's 33mm less than August, 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.

Trenggalek is relatively calm, with an average annual wind speed of 5km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 8km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 6km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans.

It is currently winter in Trenggalek, which began on June 21, 2026. Trenggalek sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in June at around 35°C, while the coldest stretch bottoms out in March near 16°C. Spring is next, beginning on September 23, 2026 — 23 days from now.

The best time to visit Trenggalek is during January, February, March and April, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 3mm per month. By contrast, June can be uncomfortably hot with temperatures reaching 35°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Trenggalek 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.