Climate and monthly weather forecast
Durham, NH

Share

The climate of Durham

Durham, a town located in New Hampshire, USA, predominantly experiences a Dfb climate according to the Köppen climate classification, indicating a humid continental climate with no dry season and warm summers. A journey through the climatic data reveals a pattern of shifting temperatures, fluctuating humidity levels, diverse rainfall occurrences and varying daylight hours that define the weather profile of this region.

Throughout the year, Durham sees a fairly regular temperature shift with its highest average temperatures in July at 77.4°F (25.2°C) and lowest in January at 19.8°F (-6.8°C). This range from the peak of summer to the depth of winter is reflective of the continental climate and marks the region's noteworthy temperature variability. Humidity levels show a minimal fluctuation, staying relatively high throughout the year, averaging from 75% to 80%.

Rainfall varies moderately throughout the year with the highest incidence in December and October both with 2.87" (73mm) and the least rainfall recorded in September, at 1.46" (37mm). There is an observable shift in the number of rainy days from a peak of 15 days in May to a low of 7.6 days in February, aligning with the overall rainfall pattern. This, coupled with data on snowfall that suggests a concentration of snow in the winter months - from 4.53" (115mm) in December to 3.9" (99mm) in January - explains the seasonal water precipitation variations in Durham.

The best time to visit Durham

The most amicable weather conditions for visiting Durham can be found in the months from May to September, encompassing late spring, summer and early autumn. During these months, one can expect the highest average temperatures, ranging from 62.2°F (16.8°C) to 77.4°F (25.2°C). Additionally, it is during this period that Durham experiences the longest daylight hours, with up to 15.3 hours of daylight in June and July. These factors contribute to a pleasant overall weather experience, suitable for outdoor activities and sightseeing.

The worst time to visit Durham

Conversely, winter months, particularly December, January and February, might prove challenging for visitors due to the colder climate and higher snowfall. Temperatures during this period average between 19.8°F (-6.8°C) and 33.6°F (0.9°C), representing the coldest months in Durham. Snowfall peaks in December and January with 4.53" (115mm) and 3.9" (99mm) of snow respectively. Shorter daylight hours, from 9.4 hours to 9.1 hours, also contribute to less optimal conditions for outdoor leisure activities.

Spring weather in Durham

Spring in Durham, unfolding from March to May, witnesses a steady rise in temperatures. The average high temperature fluctuates between 40.3°F (4.6°C) and 62.2°F (16.8°C), while the low temperatures range from 28.2°F (-2.1°C) to 47.1°F (8.4°C). Rainfall sees a slight peak in April, with an average of 2.52" (64mm). The length of daylight gradually increases with 12 hours in March and reaches 14.7 hours by the end of May, providing greater opportunity for outdoor exploration.

Summer weather in Durham

Summer in Durham, extending from June through August, is characterized by the city's highest temperatures. Average high temperatures fall from 70.2°F (21.2°C) to 76.8°F (24.9°C) and lows range from 55.2°F (12.9°C) to 61.3°F (16.3°C). Rainfall is not uncommon in the summer, although it sees a slight decrease, with the lowest average precipitation recorded in August at 1.97" (50mm). Daylight hours peak at 15.3 hours in June, slowly tapering off to 13.9 hours by August.

Autumn weather in Durham

Autumn in Durham, spanning from September to November, sees a gradual decrease in temperatures. September brings highs around 69.6°F (20.9°C) and lows around 55°F (12.8°C), but by November, highs fall to 46.6°F (8.1°C) with lows around 35.8°F (2.1°C). Rainfall increases throughout the autumn months, with November receiving an average of 2.52" (64mm) of rainfall. The shrinkage of daylight hours continues, with 12.5 hours in September and down to 9.7 hours by November.

Winter weather in Durham

Winter in Durham, stretching from December to February, exhibits the most extreme weather. Low temperatures average between 19.8°F (-6.8°C) in January, the coldest month, and reach 27.3°F (-2.6°C) by February. The average high and low temperatures range from 31.5°F (-0.3°C) to 33.6°F (0.9°C) and from 19.8°F (-6.8°C) to 21°F (-6.1°C) respectively. Snowfall is highest in December with 4.53" (115mm) on average. Daylight hours are at their shortest in December, with 9.1 hours, gradually increasing to 10.5 hours in February.

Weather in January

January marks the beginning of winter in Durham, New Hampshire, presenting a frigid climate. Compared to the later February, January exhibits a lower average temperature, with temperatures flowing from a high of 31.5°F (-0.3°C) to a cold low of 19.8°F (-6.8°C). Weather in January »

Weather in February

As February takes hold, Durham experiences a slight increase in temperature, creating a somewhat warmer atmosphere compared to the preceding January. Between 21°F (-6.1°C) as the lowest and 33.6°F (0.9°C) as the highest, the temperatures remain in the low range. Weather in February »

Weather in March

March typically brings the initial signs of spring to Durham. The temperatures start to rise gradually, and the amount of daylight begins to increase. The city experiences peak rainfall in March with precipitation amounting to 2.36" (60mm). Weather in March »

Weather in April

In April, Durham witnesses very clear signs of Spring. Compared to March, April promises milder temperatures and more sunshine hours. The month, however, can be quite humid, with relative humidity marked at 75%. The occurrence of snowfall reduces significantly, allowing spring flowers to bloom in full. Weather in April »

Weather in May

Moving into May, Durham continues to enjoy the warmth and beauty of spring. Compared to the previous month's moderate conditions, May's temperatures climb higher. As for noteworthy conditions, May records the lowest rainfall at 2.01" (51mm), making it one of the driest months. Weather in May »

Weather in June

Come June, the weather transitions from spring to summer in Durham. In comparison to May, temperatures increase yet again, offering warmer days. Alongside, daylight hours crest to their highest, providing longer sunny days. June's distinctive weather pattern makes it an optimum time for outdoor activities and events. Weather in June »

Weather in July

July showcases typical summer weather for Durham, representing the height of the warm season. With temperatures reaching the peak at 77.4°F (25.2°C) to 61.5°F (16.4°C) and keeping the mercury high, July is indeed the hottest month. Weather in July »

Weather in August

As August commences, weather conditions continue to stay characteristic of summer but are noticeably less intense than those in July. While temperatures are still high, there is a slight decrease compared to the previous month. The extended daylight hours ensure that Durhamites can still enjoy their outdoor activities. Weather in August »

Weather in September

September ushers in the early signs of fall in Durham. Compared to August, the temperatures in September show a decline but remain comfortably warm. The month of September marks a substantial decrease in rainfall, measuring at 1.46" (37mm). Weather in September »

Weather in October

October in Durham introduces crisp fall weather with cooler temperatures, especially when compared to the previous month. The noticeable shift in weather brings about the peak of the fall season. Although rainfall rises to 2.87" (73mm), the pleasant weather allows for fantastic views of autumn colors. Weather in October »

Weather in November

November establishes the onset of winter in Durham with a marked drop in temperature compared to October. Winter winds start to gather strength, causing temperatures to drop further. November brings an increase in snowfall, registering 0.98" (25mm), signifying the coming winter. Weather in November »

Weather in December

December in Durham ushers in the full swing of winter. Compared to the transitional November, temperatures in December remain consistently low. Maximum snowfall is recorded in this month at 4.53" (115mm), transforming Durham into a winter wonderland. Weather in December »
Updated: Feb 13, 2024 | Published by: Weather U.S. | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What month is the coldest in Durham?

The coldest temperatures occur during January, when averages reach a peak of 31.5°F (-0.3°C) and a low of 19.8°F (-6.8°C).

What is the most humid month in Durham?

January and February, with an average relative humidity of 80%, are most humid months.

How many days does it rain in Durham?

In Durham, New Hampshire, during the entire year, the rain falls for 144.8 days and collects up to 27.24" (692mm) of precipitation.

When does it snow in Durham?

Months with snowfall in Durham are January through April, October through December.

How many days does it snow in Durham?

Throughout the year, in Durham, there are 35.1 snowfall days, and 18.78" (477mm) of snow is accumulated.

When is the lowest UV index in Durham?

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

What is the month with the least sunshine in Durham?

The months with the least sunshine in Durham are February and December, with an average of 4.8h of sunshine.

When is Daylight Saving Time (DST) in Durham?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Durham, 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 are the least humid months in Durham?

April and November, with an average relative humidity of 75%, are the least humid months in Durham.

When it does not snow in Durham?

May through September are months without snowfall in Durham, New Hampshire.

When are the longest days in Durham?

The month with the longest days in Durham is June, with an average of 15h and 18min of daylight.

What are the warmest months in Durham?

Durham, New Hampshire, experiences its highest temperatures in July, with an average peak of 77.4°F (25.2°C) and a low of 61.5°F (16.4°C).

What is the month with the highest UV index in Durham?

July and August, with an average maximum UV index of 6, are months with the highest UV index.

What month has the most sunshine in Durham?

August has the most sunshine of the year in Durham, New Hampshire, with an average of 10.6h of sunshine.

What is the driest month in Durham?

The month with the least rainfall in Durham, New Hampshire, is September, when the rain falls for 11.4 days and typically collects 1.46" (37mm) of precipitation.

What is the rainiest month in Durham?

The wettest months in Durham, New Hampshire, are October and December, with an average 2.87" (73mm) of rainfall.

When does it snow the most in Durham?

The month with the most snowfall in Durham is December, when snow falls for 7.3 days and typically aggregates up to 4.53" (115mm) of snow.

What is the month with the shortest days in Durham?

The month with the shortest days in Durham, New Hampshire, is December, with an average of 9h and 6min of daylight.

Average temperature
Durham, NH

Average temperature - Durham, NH

The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is January (31.5°F).

The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

Average pressure
Durham, NH

Average pressure - Durham, NH

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed
Durham, NH

Average wind speed - Durham, NH

The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).

Average humidity
Durham, NH

Average humidity - Durham, NH

The months with the highest relative humidity are January and February (80%).
The months with the lowest relative humidity are April and November (75%).

Average rainfall
Durham, NH

Average rainfall - Durham, NH

The wettest months (with the highest rainfall) are October and December (2.87").
The driest month (with the least rainfall) is September (1.46").

Average rainfall days
Durham, NH

Average rainfall days - Durham, NH

The month with the highest number of rainy days is May (15 days).
The month with the least rainy days is February (7.6 days).

Average snowfall
Durham, NH

Average snowfall - Durham, NH

The month with the highest snowfall is December (4.53").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days
Durham, NH

Average snowfall days - Durham, NH

The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight / Average sunshine
Durham, NH

Average daylight / Average sunshine - Durham, NH

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).

Average sunshine days
Durham, NH

Average sunshine days - Durham, NH

The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is April (13.2 days).

Average UV index
Durham, NH

Average UV index - Durham, NH

The months with the highest UV index are 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
Durham, NH

Average visibility - Durham, NH

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

Durham, New Hampshire, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location