Weather in Hyannis

Stay up to date with the current weather conditions in the city of Hyannis to ensure your journey is as comfortable as possible. Below, you will find the latest data, charts, and forecasts to help you plan your day effectively.

The climate of Hyannis can be described as temperate, with four clearly defined seasons. Thanks to its coastal location on the Cape Cod peninsula, the ocean has a noticeable moderating effect on the weather. Scorching heat or extremely severe frosts are rare here, creating comfortable conditions for travellers throughout most of the year.

Summer is the most popular time to visit: warm weather sets in from June to August. July is considered the hottest month, with an average temperature of about 24°C, and on some days the air warms up to 30°C. Winters here are cool but not freezing: in January and February, average temperatures stay just below zero, dropping to -2°C.

The transitional seasons have their own unique characteristics. Spring arrives gradually, but tourists should be prepared for precipitation: according to statistics, May is the wettest month with the highest number of inclement days. Early autumn, especially September, often delights with mild and pleasant weather with temperatures around 19-20°C, which is excellent for walks before the noticeable cooling begins in October.

The weather in Hyannis, located in the USA, is characterised by a temperate climate with distinct seasonal changes. The coldest months are January and February, when the daily average temperature drops to -1.4°C and -2.2°C respectively, and night-time lows can reach -7.7°C. On the other hand, the warmest months are July and August, with average temperatures around 24.1°C and 23.1°C. At the peak of summer, daytime highs often exceed 30°C, creating comfortable conditions for beach holidays and water sports.

Summer in Hyannis is usually pleasant and warm, without exhausting heat, making it ideal for walking and outdoor activities. Winter months, conversely, are cool, with temperatures around zero and below, sometimes accompanied by snowfall, creating a cosy winter atmosphere. The transitional seasons — spring and autumn — are distinguished by moderate temperatures, gradually rising from March to May and falling from September to November.

Throughout the year in Hyannis, noticeable temperature fluctuations are observed between day and night hours, usually within the range of 9-13°C. This means that even on warm days, evenings can be significantly cooler, so it is recommended to carry light outerwear, especially if you plan late walks or outdoor dinners.

Precipitation in Hyannis is distributed unevenly throughout the year, and its nature depends directly on the season. In the winter months, especially in January and February, when the average temperature drops below zero, snow often falls. December, although one of the "driest" months in terms of the number of inclement days (only about 5), can also bring snowfalls or freezing rain due to transitional temperatures.

Spring marks the beginning of a wetter period. The rainiest month of the year in terms of precipitation frequency is May: up to 14 rainy days are recorded at this time. April can also be quite overcast, counting about 10 days with precipitation, so an umbrella will become an important accessory for a spring trip.

In summer and early autumn, the weather becomes more stable, but rains do not disappear completely. In June and July, precipitation falls on average 9 days a month, often in the form of short-term showers that are quickly replaced by sunshine. The most favourable period in terms of low precipitation frequency is autumn: in September, October, and November, the number of rainy days decreases to six.

When packing for Hyannis in the summer season, opt for light clothing made from natural fabrics, as in July and August the air often warms up to 30°C. Do not forget swimwear, sunglasses, and high SPF cream for a comfortable beach holiday. However, given the city's coastal location, evenings can be fresh and windy, so a light windbreaker or a cosy hoodie should definitely be in your suitcase.

Spring and autumn require a more careful selection of wardrobe due to changeable weather. The best solution will be the principle of layering: T-shirts, jumpers, and jackets that can be easily combined. Pay special attention to moisture protection if you plan a trip in spring: in May, the number of rainy days reaches a maximum (up to 14 days), so a high-quality raincoat, waterproof jacket, and reliable umbrella will become your best helpers. Comfortable closed shoes are also necessary for long walks in the off-season.

Winter months in Hyannis are frosty, with average temperatures around zero and drops to -7°C. For a trip during this period, be sure to take a warm down jacket or coat, as well as a hat, scarf, and gloves. It is recommended to use thermal underwear to feel comfortable during outdoor excursions. Shoes should be warm and have non-slip soles, as frosts and icing of sidewalks are possible.