Weather in Williamsport

Planning a journey or a stroll through the city of Williamsport? Familiarise yourself with the current weather report and detailed forecasts below to be prepared for any conditions.

The climate in Williamsport can be described as humid continental with four distinct seasons. The weather here changes from frosty in winter to truly warm in summer, allowing tourists to enjoy the full diversity of nature. Overall, it is a classic example of the climate of the north-eastern USA, where each period of the year brings its unique colours and atmosphere.

Summer in the city is usually warm and pleasant: the hottest month, July, delights with average temperatures of around 23°C, whilst during the day the air often warms up to 28°C. Winter, conversely, brings the cold: from December to February, the thermometer regularly drops below zero, especially during the night hours. Spring and autumn act as mild transitional periods with moderate temperatures, which are ideal for exploring the city.

A characteristic feature of the weather in Williamsport is the remarkable stability of precipitation. There is no sharp division into "dry" and "wet" seasons here: rain (or snow in winter) is distributed very evenly throughout the year. Practically every month sees between 10 and 14 days with precipitation, so travellers are advised to carry an umbrella or raincoat regardless of the travel date, although prolonged downpours are infrequent here.

The climate in Williamsport is characterised by distinct seasonality, offering travellers diverse conditions depending on the time of year. The coldest month is traditionally January, when the average temperature drops to -1.9°C, and frosts down to -5.4°C frequently occur at night. Summer, on the other hand, brings confident warmth: the peak of high temperatures falls in July, when the air warms up to an average of 28.0°C during the day, creating ideal conditions for a summer holiday.

The summer season here can be described as pleasantly warm, but not extremely hot. From June to August, daytime readings hold steadily in the range of 25°C–28°C, allowing for comfortable time spent outdoors. Winter in the region feels moderately frosty: from December to February, the thermometer often fluctuates around zero, with regular night-time cooling, but during the day the temperature often rises to weak positive values, for example, up to 4.3°C in February.

Travellers should also take into account noticeable diurnal temperature fluctuations, especially in the warm season. The difference between the daily maximum and the nightly minimum in summer is about 10 degrees: after a hot July day comes a refreshing night with a temperature of around 18°C. Spring and autumn serve as mild transitional periods, whilst May and September delight with the most balanced weather with average values from 15°C to 18°C.

Precipitation in Williamsport is distributed quite evenly throughout the year, so it is difficult to single out a clearly defined dry season or rainy season. Humidity remains moderate year-round, and the number of days with precipitation varies insignificantly — from 10 to 14 days per month. This means that an umbrella or raincoat may come in handy for travellers at any time of the year.

The nature of the precipitation depends directly on the air temperature. In the winter months, especially in January and February, when the thermometer drops below zero, snow often falls. December and March are transitional periods when mixed precipitation in the form of sleet and rain is possible. With the arrival of steady warmth in April, precipitation shifts exclusively to rain.

The highest frequency of rainy days is usually observed in late spring: May is considered one of the wettest months, when precipitation can occur on up to 14 days. In summer and early autumn, rains continue with a regularity of about 13 days per month. A relatively drier period can be called November, when the number of inclement days decreases to the year's minimum (about 10 days), however, even at this time the weather remains changeable.

A trip to Williamsport requires a careful approach to packing your suitcase, as all four seasons are distinct here. A universal tip for any trip is the principle of layering. This will allow you to quickly adapt to weather changes, especially in spring and autumn, when morning cool is replaced by daytime warmth. Be sure to take comfortable flat shoes with you, as exploring the city will surely require long walks.

For a winter trip, when the temperature often drops below zero, a full warm wardrobe is necessary: a windproof down jacket, hat, scarf, and gloves. In the summer months, when the air can warm up to 28°C, give preference to light clothing made from natural fabrics, and do not forget sun cream and headwear for protection against the active sun.

Particular attention should be paid to protection from moisture. Statistics show that precipitation in Williamsport falls quite regularly throughout the year (on average 11–14 rainy days per month). Therefore, we strongly recommend packing a compact umbrella or a light raincoat in your luggage so that sudden rain does not interfere with your plans, regardless of which month you arrive.