Weather in Semarang

Planning your day or a trip to Semarang? In this section, you will find up-to-date weather data, detailed forecasts, and clear charts to ensure your journey is as comfortable as possible.

The climate in Semarang, located in Indonesia, is classified as tropical monsoon. This means the city enjoys warm weather all year round, with the average air temperature steadily staying in the 26-28°C range. Fluctuations between minimum and maximum temperatures throughout the year are insignificant, ensuring consistently comfortable conditions for your stay.

There are two distinct seasons in Semarang: wet and dry. The wet season typically lasts from November to April. During these months, especially from January to March, the number of rainy days reaches a maximum – precipitation can occur almost daily. However, it is important to note that despite the high frequency, the total monthly rainfall remains low (for example, about 15 mm in January, about 12 mm in March), indicating mostly light or moderate rains rather than prolonged heavy downpours. The dry season covers the period from May to October. At this time, precipitation decreases sharply, especially in July, August, and September, when rain becomes a rare occurrence (1-2 mm per month). The weather becomes sunnier and less humid, creating ideal conditions for sightseeing and outdoor activities.

Even in the driest months of the dry season, isolated short rains are possible, but they do not significantly affect the overall weather picture. The sea water temperature off the coast of Semarang remains warm and comfortable for swimming throughout the year. Thus, when planning a trip to Semarang, it is recommended to consider these seasonal features to choose the most suitable time for your visit depending on your preferences.

The temperature regime in the city of Semarang, located in Indonesia, is characterized by consistently high figures throughout the year. Seasonal fluctuations here are minimal, creating a feeling of eternal summer. The hottest months are usually August, September, and October. During this period, the average daytime temperature often reaches 30.3-30.5°C (for example, in August and September, the maximum average temperature is 30.3°C and 30.5°C respectively), and monthly average values hover around 27.1-27.6°C. Even in the "coolest" months, such as February, the average temperature remains at a comfortable level of 25.9°C, and night temperatures rarely drop below 24.2°C.

The conditional "summer" or hottest season in Semarang lasts approximately from May to October. During these months, daytime highs hold steadily in the range of 29.4°C - 30.5°C, and nights remain very warm, with temperatures usually not lower than 23.5°C - 24.9°C. The "winter" or, more accurately, the wetter and slightly less sultry period falls on the months from November to April. At this time, average temperatures are about 26-27°C. Daytime temperature peaks in this season range from 27.6°C to 29.1°C, and night lows – from 24.2°C to 24.6°C. This period is also characterized by a large amount of precipitation, which increases the feeling of high humidity.

Daily temperature fluctuations in Semarang are small but perceptible. The difference between daytime maximum and nighttime minimum temperatures is usually between 3.4°C (in February) and 6.5°C (in August). The most noticeable changes are observed in months with less rainfall, such as July and August, when nights can bring relative coolness after the daytime heat. Overall, the climate of Semarang can be described as constantly hot and humid, with insignificant temperature variations throughout the year, making the city attractive for lovers of tropical warmth at any time.

In Semarang, as in many regions of Indonesia, there is a distinct change between wet and dry seasons during the year. Precipitation here falls mainly in the form of rain, which is characteristic of the tropical climate. Understanding these seasonal fluctuations will help you better plan your trip and choose suitable clothing.

The most wet period in Semarang lasts approximately from November to April. January is the rainiest month, when an average of about 15 mm of precipitation falls, and it rains almost daily (about 30 days). February (14 mm, 28 rainy days), March (12 mm, 30 rainy days), and December (12 mm, 29 rainy days) are also distinguished by high humidity and frequent precipitation. During these months, one should expect frequent, but judging by the total amount of precipitation, not always torrential rains.

The dry season usually sets in from May to October, bringing with it a significant decrease in the amount of precipitation and the number of rainy days. The driest months are considered July and August, when only about 1 mm of precipitation falls, and the number of days with rain is reduced to 5-6 per month. May, June, and September are also characterized by a small amount of precipitation (about 2 mm) and a noticeably smaller number of rainy days (from 6 to 14), making this period more comfortable for walks and outdoor activities.

When planning a trip to Semarang, it is important to consider its tropical climate with high humidity and warm temperatures year-round. The average annual temperature fluctuates between 26-28°C, so the basis of your wardrobe should be light, breathable clothing made from natural fabrics such as cotton or linen. Do not forget comfortable shoes for walking, as you will surely want to explore the city on foot. High SPF sunscreen, a hat, and sunglasses are also mandatory attributes for protection against the active sun.

Semarang has a clearly defined rainy season, which usually lasts from November to April, reaching a peak in rainfall and rainy days from January to March. During this period, be sure to take a light raincoat or a compact umbrella, as well as clothes that dry quickly. A second pair of shoes may also be useful in case one gets wet. From May to October, rainfall decreases significantly, especially in July and August, but even in the dry season, short downpours are not excluded, so a small umbrella may still prove useful. The principle of layering clothing here is not so much for warmth as for protection from rain and sun, as well as for comfort in air-conditioned rooms.

Besides clothing, do not forget insect repellent, especially if you plan to spend time in nature or outdoors in the evening. A light scarf or shawl may come in handy for visiting religious sites where it is required to cover shoulders, or for cool evenings, although the temperature rarely drops significantly. In general, your luggage should be oriented towards hot and humid weather, with special preparation for the rainy season if your trip falls during this period.