Climate and monthly weather forecast
Norwich, CT

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The climate of Norwich

Norwich, Connecticut resides firmly within the Dfb zone according to the Köppen climate classification, meaning it experiences a humid continental climate with no dry season and a warm summer. Geographically, its location in the Northeastern United States marks it as an area impacted by a range of weather conditions annually.

Temperature throughout the year in Norwich varies considerably, with high average temperatures ranging from 34.9°F (1.6°C) in January to 81.7°F (27.6°C) in July, while low average temperatures shift from 23.4°F (-4.8°C) during January to 64.6°F (18.1°C) in July. The humidity levels remain relatively uniform all year round, fluctuating from 72% to 78%. Precipitation patterns also maintain consistency, with monthly rainfall values ranging from 1.61" (41mm) to 3.7" (94mm). It is interesting to note that snowfall mainly occurs from December to March, with minimal to no snowfall recorded from May to November.

Daylight variations in Norwich provide a diverse range; shorter daylights of 9.2 hours in December extend to 15.1 hours in June. Sunshine duration follows a similar pattern, from 4.6 hours in December to 10.2 hours from July to August. Regarding wind, it maintains an average speed from 6.1 to 9.4mph (15.1km/h) with gust values reaching 14.5mph (23.3km/h).

The best time to visit Norwich

With a blend of mild temperatures and moderate rainfall, the period from late spring to early fall emerges as the optimum time to visit Norwich. This interval, specifically from May to September, shows average high temperatures ranging from 66.7°F (19.3°C) to 80.2°F (26.8°C) and low temperatures from 50°F (10°C) to 64.6°F (18.1°C). The rain averages from 2.56" (65mm) to 2.87" (73mm) with more extended daylight hours, peaking to a maximum of 15.1 hours in June.

The worst time to visit Norwich

The winter months, specifically from December to February, encapsulate what can be deemed as the least desirable time for a visit to Norwich. This period registers the coldest temperatures, plummeting to 23.4°F (-4.8°C) for the lows and only reaching up to 37.8°F (3.2°C) for the highs. Snowfall peaks around this time, reaching up to 3.43" (87mm) and the duration of daylight recedes to approximately 9.6 hours in January.

Spring weather in Norwich

Spring in Norwich heralds the commencement of warmer temperatures and escalating levels of precipitation. Average high temperatures elevate from 44.2°F (6.8°C) in March to 66.7°F (19.3°C) in May while lows see a hike from 31.1°F (-0.5°C) in March to 50°F (10°C) in May. Rainfall levels showcase a staggered increase from 2.83" (72mm) in March to a peak of 3.27" (83mm) in April before receding to 2.56" (65mm) by May-end.

Summer weather in Norwich

Summer in Norwich is defined by warm temperatures, higher humidity, and relatively lesser rainfall. The average highs and lows oscillate between 74.5°F (23.6°C) to 81.7°F (27.6°C) and 57.4°F (14.1°C) to 64.6°F (18.1°C) respectively. Rainfall fluctuates around the 2.83" (72mm) mark, with June receiving the highest rainfall.

Autumn weather in Norwich

Autumn witnesses a significant drop in temperatures, with average highs dwindling from 73.2°F (22.9°C) in September to 50.2°F (10.1°C) in November, and average lows dropping from 57.4°F (14.1°C) to 38.1°F (3.4°C). Precipitation rises gradually from 1.61" (41mm) in September, peaking to 3.23" (82mm) in October, before again declining to 2.95" (75mm) in November.

Winter weather in Norwich

Winter is Norwich's coldest season, with temperatures reaching their yearly lows. Average highs range from 50.2°F (10.1°C) in December to 34.9°F (1.6°C) in January and average lows drop from 29.8°F (-1.2°C) to 23.4°F (-4.8°C) in the same period. Snowfall is a staple feature of the season, with its peak in January at 3.43" (87mm), lessening by March.

Weather in January

Connecticut's velvet winters roll out in full swing during January in Norwich. Trees disrobe their foliage welcoming a snowy mantle with snowfall peaking at 2.52" (64mm). Slight chills escalate as this month experiences lower temperatures compared to December. Weather in January »

Weather in February

In Norwich, February heralds an atmosphere slightly warmer than January. It sees a slight uptick in temperatures but the snowfall inches up to 2.8" (71mm). With that, the city continues to embrace the winter chill, leaving streets aglow with shimmering snow. Weather in February »

Weather in March

The arrival of March in Norwich, Connecticut ushers in the delightful beginnings of the spring season. As compared to February, the temperatures rise steadily, however, snowfall reaches its zenith at an average of 3.43" (87mm). The winds start to lose their biting edge, giving rise to more sunny days. Weather in March »

Weather in April

April comes as a breath of fresh air in Norwich, with average temperatures climbing up to 55.9°F (13.3°C) during the day and dipping to 40.6°F (4.8°C) at night. It is quite the departure from the snowy March, with snowfall almost becoming negligible. Weather in April »

Weather in May

May brings along the true spirit of spring in Norwich, it's a delightful transition from the cooler April. There's a noticeable increase in temperatures, but the rainfall does catch the eye with 2.56" (65mm) on average. The city starts to buzz with outdoor activities, making the most of the increased daylight and sunshine hours. Weather in May »

Weather in June

June marks the onset of summers in Norwich. The temperatures spike up during this month, but it also sees a welcome increase in daylight hours. It is a month blessed with the longest sunshine duration, reaching its peak at 15.1 hours a day. Weather in June »

Weather in July

The month of July holds the crown as the warmest month in Norwich, with temperatures soaring to an average high of 81.7°F (27.6°C). Rainfall sees a minor increase, clocking in at 2.87" (73mm) in total. Residents find a welcome respite in the form of brief, sporadic showers which temper the scorching summer days. Weather in July »

Weather in August

In Norwich, August presents a continuation of July's typical summer weather, but begins its gradual transition towards fall. The temperatures exhibit a slight decline compared to July, however, still remain quite high. The rainfall also sees a decrease from the previous month. Weather in August »

Weather in September

Norwich transitions from summer to fall in September, with temperatures starting to cool down. The rainfall sees a decrease, marking the lowest in the year at 1.61" (41mm). Days start to shorten, paving the way for longer and cooler nights. Weather in September »

Weather in October

October brings along the full glory of the autumn season in Norwich, Connecticut. A drop in temperatures is witnesses as compared to September, although rainfall shows an upward trend with an average of 3.23" (82mm). The trees are full of vibrant autumnal colors of orange and red, contrasting beautifully with the clear, blue skies. Weather in October »

Weather in November

November witnesses a steep drop in temperatures, signaling the advent of winter in Norwich. The weather markedly shifts from the warm October days with snowfall making an appearance after a long hiatus. Despite bringing in the cold, it spoils residents and visitors with long sunshine hours, reaching up to 17.4 days. Weather in November »

Weather in December

The frigid winter takes center stage in Norwich, Connecticut come December. There's a stark contrast in weather from the end of November, with the mercury dipping even further and snowfall settling at 1.73" (44mm). The shortest daylight duration of the year takes over the city, resulting in longer and chillier nights. Weather in December »
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the coldest in Norwich?

The lowest temperatures in Norwich, Connecticut, are recorded in January, with averages reaching a high of 34.9°F (1.6°C) and a low of 23.4°F (-4.8°C).

How many days does it rain in Norwich?

In Norwich, during the entire year, the rain falls for 156.4 days and collects up to 33.54" (852mm) of precipitation.

When does it snow in Norwich?

January through May, November and December are months with snowfall.

How many days does it snow in Norwich?

In Norwich, Connecticut, during the entire year, snow falls for 26.4 days and aggregates up to 11.14" (283mm) of snow.

When is the lowest UV index in Norwich?

The months with the lowest UV index in Norwich are January through March, November and December, with an average maximum UV index of 2.

What is the most humid month in Norwich?

The months with the highest humidity in Norwich, Connecticut, are February, June, July and September, with an average relative humidity of 78%.

When does it snow the most in Norwich?

March is the month with the most snowfall in Norwich. Snow falls for 6 days and accumulates 3.43" (87mm) of snow.

When is Daylight Saving Time (DST) in Norwich?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Norwich, Connecticut, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.

What is the least humid month in Norwich?

The least humid month is April, with an average relative humidity of 72%.

When it does not snow in Norwich?

June through October are months without snowfall.

When are the longest days in Norwich?

June has the longest days of the year, with an average of 15h and 6min of daylight.

What are the months with the highest UV index in Norwich?

The months with the highest UV index are June through August, with an average maximum UV index of 6.

What month is the hottest in Norwich?

In Norwich, Connecticut, the average highest temperatures are observed in July, with a high of 81.7°F (27.6°C) and a low of 64.6°F (18.1°C).

What are the months with the most sunshine in Norwich?

The months with the most sunshine in Norwich, Connecticut, are July and August, with an average of 10.2h of sunshine.

What is the driest month in Norwich?

September is the month with the least rainfall. Rain falls for 11.8 days and accumulates 1.61" (41mm) of precipitation.

What is the rainiest month in Norwich?

The month with the most rainfall in Norwich, Connecticut, is December, when the rain falls for 11.3 days and typically aggregates up to 3.7" (94mm) of precipitation.

What is the month with the shortest days in Norwich?

With an average of 9h and 12min of daylight, December has the shortest days of the year in Norwich.

What is the month with the least sunshine in Norwich?

With an average of 4.6h of sunshine, December has the least sunshine of the year in Norwich.

Average temperature
Norwich, CT

Average temperature - Norwich, CT

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (34.9°F).

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

Average pressure
Norwich, CT

Average pressure - Norwich, CT

The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed
Norwich, CT

Average wind speed - Norwich, CT

The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).

Average humidity
Norwich, CT

Average humidity - Norwich, CT

The months with the highest relative humidity are February, June, July and September (78%).
The month with the lowest relative humidity is April (72%).

Average rainfall
Norwich, CT

Average rainfall - Norwich, CT

The wettest month (with the highest rainfall) is December (3.7").
The driest month (with the least rainfall) is September (1.61").

Average rainfall days
Norwich, CT

Average rainfall days - Norwich, CT

The months with the highest number of rainy days are May and July (16.3 days).
The month with the least rainy days is January (9 days).

Average snowfall
Norwich, CT

Average snowfall - Norwich, CT

The month with the highest snowfall is March (3.43").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days
Norwich, CT

Average snowfall days - Norwich, CT

The month with the highest number of snowfall days is February (7.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight / Average sunshine
Norwich, CT

Average daylight / Average sunshine - Norwich, CT

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).

The months with the most sunshine are July and August (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).

Average sunshine days
Norwich, CT

Average sunshine days - Norwich, CT

The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is June (11.6 days).

Average UV index
Norwich, CT

Average UV index - Norwich, CT

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average visibility
Norwich, CT

Average visibility - Norwich, CT

The months with the highest visibility are January, February, March, April, September, October, November and December (6mi).
The months with the lowest visibility are May, June, July and August (5mi).

Norwich, Connecticut, USA

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