Staten Island is part of New York City, but due to its geographical characteristics as an island and its proximity to the Atlantic Ocean, it exhibits slightly different weather patterns compared to other boroughs in New York City. Understanding the weather and seasonal characteristics of this area in advance can greatly assist in planning your activities.

Staten Island falls under a humid continental climate, which is a mix of the northeastern United States' continental and maritime climates. The four seasons are distinct, with hot and humid summers and cold, snowy winters. The average annual temperature is around 55°F (13°C), which is similar to the overall average for New York City. However, the influence of the surrounding waters tends to moderate extreme temperature changes compared to inland areas.

Spring (March to May) is one of the most beautiful seasons in Staten Island. March is still chilly, with average temperatures ranging from 40 to 50°F (4 to 10°C), and late snowfalls can occur. Starting in April, flowers begin to bloom, and temperatures rise to 50 to 60°F (10 to 16°C), making outdoor activities more pleasant. By May, temperatures reach 60 to 70°F (16 to 21°C), creating ideal weather for trail hiking or park strolls. However, spring tends to be rainy, with average monthly precipitation around 3 to 4 inches (approximately 75 to 100 mm). This is also the season when the greenery of Staten Island's greenbelt shines the brightest.

Summer (June to August) is hot and humid. The average temperature in June is around 70°F (21°C), while in July and August, it rises to 75 to 80°F (24 to 27°C). The high humidity often makes it feel warmer than it actually is, and particularly in late July, heat waves can push the perceived temperature above 95°F (35°C). Summer rainfall averages about 3 to 4 inches per month, distributed relatively evenly throughout the year, with sudden thunderstorms occasionally occurring. Staten Island's summer feels slightly cooler than inland areas due to the sea breeze, but humidity remains high.

Autumn (September to November) is considered the most pleasant season in New York. In September, the summer heat gradually subsides, with temperatures starting to drop to 65 to 70°F (18 to 21°C). October is the peak season for fall foliage in Staten Island's greenbelt, where the red and yellow leaves create a stunning view across the island. The average temperature in October is around 55 to 60°F (13 to 16°C). By November, temperatures drop sharply, and preparations for winter begin. Autumn features relatively low precipitation and many clear days, making it the ideal season for outdoor activities.

Winter (December to February) is cold. The average temperature in December is around 35 to 40°F (2 to 4°C), while January and February are the coldest months, with average temperatures dropping to 30 to 35°F (-1 to 2°C). On windy days, the perceived temperature can fall below -10°C. A storm known as a 'Nor'easter,' which particularly affects Staten Island, can bring heavy snowfall in a short period.

In terms of snowfall, Staten Island is similar to the average for New York City, but there can be some differences depending on the northern and southern parts of the island. The average annual snowfall is about 25 to 30 inches (63 to 76 cm), with most snow falling between December and February. In the winters of 2010, 2011, and 2016, heavy snowfalls of 60 to 70 inches (over 150 cm) caused significant disruptions to local transportation. During heavy snowfalls, bridge access may be restricted, causing particular inconvenience for island residents.

During hurricane season (June to November), Staten Island can also be affected. Hurricane Sandy in 2012 caused extensive damage to Staten Island, particularly in the eastern coastal areas such as Oakwood Beach and Grasmere, which experienced severe flooding and storm surge damage. Following this event, some residents in certain coastal areas of Staten Island received relocation assistance. It is now important to refer to flood risk maps when choosing where to live.

Fog is a relatively common weather phenomenon in Staten Island. Due to its island nature, there are days when sea fog occurs, especially during the transitional seasons of spring and fall. This can affect Staten Island ferry operations, but prolonged severe fog is not very common.

If you plan to live in or visit Staten Island, it is advisable to prepare adequately considering the seasonal characteristics. In summer, light clothing along with sunscreen and insect repellent are necessary, while in winter, warm clothing and snow removal tools are essential. Regardless of the season you visit, you can fully enjoy Staten Island's natural environment and local culture, but different preparations are needed for each season.