Weather in Hilo

Planning your day in Hilo? Check out the freshest weather data, forecasts, and useful charts right in this section.

Hilo, located in the United States, is distinguished by a remarkably stable and warm climate, which can be described as humid tropical. Temperatures here remain at a comfortable level year-round: daily averages fluctuate mainly from 16.6°C to 20.0°C. This stability means there are no sharp seasonal temperature changes, making the weather in Hilo predictably warm at any time of year.

There are no clearly defined seasons in Hilo based on large temperature fluctuations, such as hot summers or cold winters. Instead, the main feature of the climate is constant high humidity and frequent rainfall. The number of "rainy days" remains high throughout the year, often exceeding 20 days per month, even if the total amount of precipitation is small. For example, in February and March, the number of rainy days reaches 25-28, while even in months that are relatively "dry" in terms of rainfall volume, like June or July (only 3 mm), there are still about 20 rainy days. This suggests that light rains or brief showers are a common occurrence for Hilo, contributing to the region's lush tropical vegetation.

Travellers planning a trip to Hilo should expect warm and comfortable weather regardless of the season. A key characteristic of the local climate is its high humidity and frequent rains. Although this does not always mean prolonged downpours, it is definitely worth being prepared for regular precipitation. It is precisely this constant moisture that nourishes the island's vibrant greenery and creates its unique atmosphere.

The weather in Hilo is characterized by a remarkably stable and mild temperature regime throughout the year. The annual range of average temperatures fluctuates slightly: from approximately 16.6°C in February, which is the coolest month, to 20.0°C in August and September – the warmest months. This creates comfortable conditions for visiting the city at practically any time of year, as sharp temperature drops are not observed here.

Summer months in Hilo, lasting from June to September, bring pleasant warmth. Average maximum temperatures during this period reach 22-23°C, while nights remain comfortable with minimum temperatures around 16-17°C. Winter, covering December, January, and February, is very mild here. Daytime temperatures usually hold around 20°C, dropping to 13-14°C at night. Frosts or severe cold are uncharacteristic for Hilo. Temperature fluctuations between day and night exist but are moderate, averaging 6-7°C, which ensures pleasant freshness in the evening and at night without sudden drops.

In Hilo, precipitation is a common occurrence, evenly distributed throughout the year. The city is known for a large number of rainy days in almost every month, which indicates constant high humidity. A clearly defined dry season, when rains are practically absent, is not observed here, although the intensity of precipitation varies from month to month.

According to the provided data, the highest amount of precipitation falls in February, when the volume reaches 13 mm. There are also periods, for example, in the middle of summer, when the total volume of precipitation noticeably decreases. However, it is important to note that even in these months with less fallen moisture, rainy weather persists quite often, which highlights the general humidity of the Hilo climate.

Given the warm climate of Hilo, all precipitation falls exclusively as rain; snow is uncharacteristic for this region. A feature of the local climate is the high frequency of rains with a comparatively small total monthly volume in some periods. This may mean that frequent, but not too intense or short-lived precipitation is typical for the city, possibly in the form of light rain or drizzle. This tendency towards frequent but not heavy rains is confirmed by statistics on the number of rainy days even in months with relatively low total precipitation levels.

When planning a trip to Hilo, it is important to consider its unique climate. The city is known for its high humidity and frequent, though not always heavy, rains throughout the year. The average annual temperature fluctuates in a comfortable range from 16°C to 23°C, which means you will not need heavy winter clothing. A key element of your wardrobe should be a good raincoat or a light waterproof jacket, as well as a compact umbrella. Given the large number of rainy days (from 18 to 28 per month), waterproof or quick-drying shoes will be very useful.

For everyday wear, light breathable fabrics are suitable: t-shirts, shorts, skirts, and light trousers. Since evenings and early mornings can be slightly cooler, especially in the winter months (from December to February, when the average temperature drops to 16-17°C), it is recommended to bring a few items for layering – for example, a light sweater, cardigan, or fleece. This will allow you to easily adapt to small temperature changes throughout the day.

Do not forget comfortable walking shoes, as there are many interesting places to explore in Hilo and its surroundings. Also, despite frequent rains, the sun can be quite active, so sunscreen, a hat, and sunglasses will be helpful. Insect repellent may also come in handy, especially if you plan to spend time in nature.