Stonington

Stay up to date with the latest weather information for the city of Stonington. Below you will find current data, detailed forecasts, and helpful charts to help you plan your time.

The climate in Stonington, USA, is classified as temperate with four distinct seasons. Visitors can expect significant temperature fluctuations throughout the year, making the timing of your trip an important factor.

Winters in Stonington (December–February) are quite cold, with average temperatures around 0–3°C, occasionally dropping below freezing. In contrast, summers (June–August) are warm and pleasant, with average temperatures ranging from 20–24°C, with July being the warmest month. Spring (March–May) and autumn (September–November) are transitional periods featuring gradual warming and cooling, respectively.

Precipitation is distributed relatively evenly throughout the year, averaging 3–4 mm per month. The number of rainy days is also fairly constant, ranging from 9 to 13 days per month. This indicates that light or moderate precipitation is possible at any time of year, without a pronounced rainy season.

Stonington experiences a noticeable change of seasons with distinct temperature fluctuations throughout the year. The hottest months are usually July, with an average temperature of 23.9°C and maximums reaching an average of 27.7°C, and August, where the average temperature is 23.2°C with maximums around 26.9°C. The coldest period is winter, especially January, when the average temperature drops to 0.6°C and minimum nighttime temperatures can reach -2.8°C. February is also cold, with an average temperature of 1.7°C and minimums around -2.0°C.

Summer months in Stonington, from June to August, are characterized by pleasantly warm weather that can become quite hot. In June, the average temperature is around 20.1°C (low 15.9°C, high 24.3°C), gradually rising toward July, the warmest month. In August, the weather remains very warm. Daytime highs during this period generally range from 24°C to almost 28°C, creating comfortable conditions for outdoor activities. Summer night temperatures also stay fairly high, typically not dropping below 15.9°C in June and reaching 20°C in July.

Winter in Stonington, covering December, January, and February, brings cool and occasionally freezing weather. Average temperatures during these months range from 0.6°C in January to 2.9°C in December. At night, the mercury regularly drops below freezing, especially in January (averaging -2.8°C) and February (averaging -2.0°C), as well as in December (averaging -0.4°C). Daytime temperatures in winter usually stay slightly above zero, ranging from 4.1°C in January to 6.2°C in December. Fluctuations between day and night temperatures occur year-round, averaging 6–9°C, which is moderate and does not indicate sharp changes during the day.

Looking at the details of precipitation distribution in Stonington, the highest average amount of 4 mm occurs in January, March, April, July, September, October, and December. Slightly less, 3 mm each, falls in February, May, June, August, and November. July and August lead in the number of precipitation days, with an average of 13 such days each. The lowest number of rainy days, just 9, is typical for November. In other months, this figure varies from 10 to 12 days, highlighting the lack of sharp fluctuations in precipitation frequency throughout the year.

Given the temperature patterns, the nature of precipitation in Stonington changes depending on the season. In the winter months, when average daily minimum temperatures drop below freezing, precipitation often falls as snow. This is especially typical for January (minimum temperature -2.8°C), February (-2.0°C), and December (-0.4°C). In March, with a minimum temperature around 0.9°C, snowfall is also possible, particularly at the beginning of the month. During the warmer period from April to October, precipitation falls primarily as rain.

When planning a trip to Stonington, it's important to consider the variable weather throughout the year. In winter (from December to February), average temperatures hover around freezing, dropping to -2.8°C in January, so warm clothing—including a hat, gloves, a scarf, and a waterproof jacket—will be absolutely essential. Although the total precipitation is low (3–4 mm per month), there are quite a few rainy days (9–11 days), so light waterproof gear or an umbrella will be useful during this time as well.

In spring (from March to May) and autumn (from September to November), the weather in Stonington becomes milder but remains changeable. Average temperatures range from 5°C in March to 19.4°C in September. During these seasons, layering is recommended: a light jacket, sweater, or fleece, along with comfortable walking shoes, will come in very handy. Don't forget an umbrella or raincoat, as the number of rainy days remains consistently high (10–12 days per month).

Summer (from June to August) in Stonington is warm and pleasant, with average temperatures ranging from 20.1°C to 23.9°C, while maximums can reach 27.7°C. Light summer clothing is suitable for this time of year, but it's wise to have a light sweater or jacket for evening walks or cooler days. Given that there can be up to 13 rainy days per month even in summer, a compact umbrella or light raincoat won't go amiss. Also, don't forget sunscreen and a hat for sun protection. Regardless of the season, comfortable walking shoes will be your best companion for exploring the city.