Weather in Hagatna

Stay informed about the current weather conditions in the city of Hagatna. Below you will find up-to-date summaries, forecasts, and charts to help you plan your day effectively.

Hagatna's climate can be described as tropical marine, characterised by remarkably stable temperatures. Eternal summer reigns here: throughout the year, average thermometer readings stay within the comfortable range of +26°C to +28°C. Thanks to this, the ocean water always remains warm, and sudden cold snaps are completely uncharacteristic of this region.

There is a distinct seasonality in the weather, which depends not on air temperature but on rainfall. The first half of the year, especially from January to April, is considered the "dry" season: rain falls less frequently, and there are more sunny days, making this the most popular time for tourists. Starting from July through October, humidity rises, and the rainy season begins, with precipitation becoming frequent and abundant, reaching its peak at the end of summer.

A characteristic feature of the local climate is that even during the rainiest period, downpours are often intense but short-lived, quickly giving way to bright sunshine. Travellers should be prepared for high humidity year-round, although fresh ocean breezes help make the heat more bearable, ensuring a pleasant stay in Hagatna during any month.

The climate in Hagatna is distinguished by amazing stability, turning this city into a realm of eternal summer. Analysing annual figures, one can notice the absence of the sharp seasonal fluctuations familiar to many regions. Average temperatures throughout the year fluctuate within a very narrow range — from 26.5°C to 27.6°C. This makes Guam an ideal destination for those seeking warmth regardless of the calendar month.

The nominal "winter" here is felt only as a barely perceptible decrease in heat. February is considered the "coolest" month, with an average temperature of about 26.5°C. The summer period and early autumn bring a slight increase in readings: in June and November, the air warms up to an average of 27.5°C — 27.6°C. July and August see stable warm weather, which, combined with tropical humidity, creates an atmosphere of true resort heat.

A characteristic feature of Hagatna's temperature regime is the minimal difference between day and night readings. Judging by meteorological data, the gap between the average minimum and maximum is quite small, usually amounting to about 1.5–2 degrees (for example, in August from 26.2°C to 28.4°C). This means the nights here are just as warm and velvety as the days, so tourists are unlikely to need warm clothes for evening walks.

The climate in Hagatna is characterised by high humidity and regular rainfall throughout the year, which is typical for tropical latitudes. Nevertheless, a certain seasonality can be traced here. The most favourable time for those who prefer drier weather is the beginning of the year. The "driest" months are considered to be February and March, when minimum rainfall volume is recorded, and the number of rainy days drops to 15–16 per month.

The rainy season becomes noticeable in the second half of the year. The wettest months are July, August, September, and October. Statistics show that in July and August, precipitation can occur almost daily (up to 30 rainy days), and the peak rainfall volume usually falls in September. During this period, travellers should be prepared for frequent rains.

Towards the end of the year, in November and December, the intensity of precipitation begins to gradually decrease, although the number of wet days still remains significant (about 23–26 days). Since it is warm year-round in Guam, precipitation falls exclusively as rain. Tourists are advised to carry an umbrella or raincoat, especially if the trip is planned for the period from summer to mid-autumn.

Since eternal summer reigns in Hagatna with a stable average temperature of about +27°C, the foundation of your wardrobe should be light, loose clothing made from natural, breathable fabrics. Cotton T-shirts, shorts, linen shirts, and summer dresses will be the ideal choice for comfortable walks around the city. Be sure to take care of reliable protection against the active tropical sun: bring a wide-brimmed hat, high-quality sunglasses, and high-SPF cream, which will be useful in any month of the year.

Given the high humidity and regular rainfall, a compact umbrella or a light raincoat is a must-have in your suitcase. This is especially relevant for the period from July to October, when it rains almost daily, although brief downpours are possible even in the drier months (February-March). It is better to choose comfortable and quick-drying shoes, such as open sandals or trainers with good ventilation, which are not afraid of getting wet and are suitable for long walks.

Do not forget swimwear, as beach holidays are an integral part of a trip to Guam; special aqua shoes may be useful for entering the water to protect against corals. It is also worth noting that despite the heat outside, powerful air conditioners often operate in shopping centres, hotels, and transport. Therefore, a light jumper, windbreaker, or long-sleeved cardigan will make your stay indoors much more comfortable.