Climate and monthly weather forecast
Windham, NH

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The climate of Windham

Geographical positioning and climatic classification play a significant role in Windham, New Hampshire, USA's overall weather scenario. According to the Köppen climate classification, Windham falls under the Dfb category, which suggests a humid continental climate, with no dry season and a warm summer.

Travelling across the calendar year, a close inspection of the weather parameters shows a significant variation. The high temperatures range from a chilling 32.2°F (0.1°C) in January to a warm 81.7°F (27.6°C) in July. Low temperatures, too, shift from 20.3°F (-6.5°C) in the icy days of January to 63°F (17.2°C) during the balmy nights of July. Humidity levels remain quite steady, hovering around 74 to 79%, creating a relatively moist environment for the citizens.

Rainfall distribution follows a somewhat arbitrary pattern, with December clocking in the maximum average rainfall of 2.87" (73mm) and September the least with 1.3" (33mm). On average, Windham experience between 7.6 to 15.9 days of rain per month, keeping the region well hydrated. However, the winter months from December to February and March to a lesser extent bring occasional snowfall. It peaks in February with an average of 5.87" (149mm), giving the town a picturesque, snow-clad look.

The best time to visit Windham

Given the climate synopsis, the period from May to September can be considered as an optimal time to visit Windham. During these months, the city experiences pleasant high temperatures running from 66°F (18.9°C) to 81.7°F (27.6°C). Additionally, these months boast a considerable amount of daylight from 14.7 hours in May down to 12.5 hours in September. Combined with more sunshine hours, this period provides an ample opportunity for outdoor exploration and activities.

The worst time to visit Windham

Contrarily, January and February might prove to be challenging for visitors due to low temperatures and increased snowfall. High temperatures average between 32.2°F (0.1°C) to 34.9°F (1.6°C) and snowfall averages around 5.87" (149mm) in February. In addition to this, these months have the year's shortest daylight periods, with January seeing only 9.5 hours per day.

Spring weather in Windham

Spring in Windham spans from March to May, showcasing a gradual rise in temperature from 42.1°F (5.6°C) to 66°F (18.9°C). This period is characterized by a moderate level of rainfall, decreasing from 2.64" (67mm) in April to 1.97" (50mm) in May. The lengthening daylight from 12 hours in March to 14.7 hours in May ensures a bright and pleasant spring season.

Summer weather in Windham

Summer in Windham, from June through August, is typically warm with average high temperatures peaking in July at 81.7°F (27.6°C). The period also sees a slight drop in rainfall and an increased amount of daily sunshine, with 15.3 hours of daylight and 10.3 hours of sunshine in June. The region's relative humidity remains fairly consistent, contributing to the overall pleasantness of the season.

Autumn weather in Windham

Fall sees a cascade of changing temperatures from a comfortable 72.3°F (22.4°C) in September to a more crisp 48.2°F (9°C) come November. November also sees a slight resurgence in rainfall with 2.64" (67mm), adding a wet edge to the otherwise moderate weather. The drop in daylight hours from 12.5 to 9.8 hours supports the cooler atmosphere of the fall season.

Winter weather in Windham

Winter in Windham arrives in December and lasts until February. During this period, the temperatures drop drastically with high temperatures averaging between 37.9°F (3.3°C) to 34.9°F (1.6°C) from December to February. Moreover, snowfall begins in December, leading to an average of 8.5 days of snowfall in January. With only around 9 hours of daylight, the winter season in Windham could be categorized as long, cold, and typically cloudy, making it less ideal for outdoor activities.

Weather in January

Kicking off the year, January grapples with the hold of winter. The climate condition embraces a noticeable level of humidity, translating into frequent snowfall. The month receives 3.46" (88mm) of snow, accumulating over 8.5 days. Weather in January »

Weather in February

February brings forth minor relief to January's intense winter chill. Namely, the temperatures rise slightly, paving the way for more comfortable days, but do not quite escape the winter threshold. Notably, February observes an increase in snowfall with 5.87" (149mm) deposited over 7.7 days. Weather in February »

Weather in March

The first month of the spring, March, is also an icy month in Windham, New Hampshire, with an average temperature fluctuating between 28.6°F (-1.9°C) and 42.1°F (5.6°C). March's arrival signals a modest temperature shift, moving from a wintry 34.9°F (1.6°C) in February to a still cold 42.1°F (5.6°C). Weather in March »

Weather in April

April in Windham, New Hampshire, is a fresh spring month, with an average temperature varying between 38.8°F (3.8°C) and 54.7°F (12.6°C). April brings a rise in the average high-temperature, transitioning from March's cold 42.1°F (5.6°C) to a fresh 54.7°F (12.6°C). Weather in April »

Weather in May

As the calendar flips to May, spring is fully underway. The tantalizing smell of blooming flowers fills the air, coupled with a heightened comfort in temperatures. This month is indeed a break from the snowfall, with precipitation reduced to only 0.16" (4mm) contained within 0.1 days. Weather in May »

Weather in June

June brings forth the zenith of spring coupled with the first glimpses of summer. The outdoor scenery buzzes with life and vibrancy, and any potential remnants of snow have effectively disappeared. Moreover, this month marks the first without any snowfall. Weather in June »

Weather in July

July witnesses the peak of the summer season. Mid-year, Windham enjoys a stretch of unarguably warm weather complemented by extended daylight hours. The highest annual temperature, 81.7°F (27.6°C), is recorded in July. Meanwhile, the generous sunshine maximizes outdoor activities, while the retained mildness in wind conditions adds a refreshing balance to the increasing heat. Weather in July »

Weather in August

Despite the advent of August, the consistently warm trend continues unabated. The transition to a slightly more tolerable weather range is seen, though summer remains in full-swing. Regardless, August does not push the envelope much further than July, and the temperature is a close contender for the year's annual highest at 79.9°F (26.6°C). Weather in August »

Weather in September

September signifies the arrival of the late-summer to early-fall transitory phase. It heralds the gradual reduction of heat, though the weather still remains comfortably warm for the most part. In contrast to the preceding months, September offers no precipitation, marking the first month devoid of rainfall. Weather in September »

Weather in October

October encapsulates the heart of the fall season. The dropping temperatures deem it a joyful period for admirers of mild weather. However, the tenacity of Windham's climate is demonstrated with a minimal snowfall of 0.08" (2mm) occurring over 0.1 days. Weather in October »

Weather in November

November undeniably hints at the conclusion of fall, leading into the initial stages of winter. A coolness persistently lingers in the air, pointing towards the upcoming cold stretch. The snowfall from October carries forward to November, though in a minimal quantity of 0.91" (23mm) spread over 1.7 days. Weather in November »

Weather in December

Closing the year, December unabashedly ushers in the winter season. The cold is now an everyday reality, turning landscapes into beautiful frosted masterpieces. With December, the dominant snowfall returns, having accumulated 4.49" (114mm) over 5.3 days. Weather in December »
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Frequently asked questions

What is the coldest month in Windham?

With an average high-temperature of 32.2°F (0.1°C) and an average low-temperature of 20.3°F (-6.5°C), January is the coldest month in Windham, New Hampshire.

How much does it rain in Windham?

In Windham, New Hampshire, during the entire year, the rain falls for 144 days and collects up to 26.97" (685mm) of precipitation.

When does it snow in Windham?

January through May, October through December are months with snowfall in Windham.

How much does it snow in Windham?

Throughout the year, there are 31.9 snowfall days, and 20.94" (532mm) of snow is accumulated.

What is the month with the lowest UV index in Windham?

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

What is the most humid month in Windham?

With an average relative humidity of 79%, February is the most humid month.

What is the snowiest month in Windham?

The month with the most snowfall in Windham, New Hampshire, is February, when snow falls for 7.7 days and typically aggregates up to 5.87" (149mm) of snow.

What is the month with the least sunshine in Windham?

The month with the least sunshine in Windham, New Hampshire, is February, with an average of 4.7h of sunshine.

When is Daylight Saving Time (DST) in Windham?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Windham, New Hampshire, 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 Windham?

With an average relative humidity of 71%, April is the least humid month in Windham.

When it does not snow in Windham?

In Windham, New Hampshire, snow does not fall in June through September.

When are the longest days in Windham?

June has the longest days of the year, with an average of 15h and 18min of daylight.

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

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

What is the hottest time of year in Windham?

Windham's temperatures tend to reach their peak averages in July, with a high of 81.7°F (27.6°C) and a low of 63°F (17.2°C).

What month has the most sunshine in Windham?

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

What is the driest month in Windham?

The month with the least rainfall in Windham is September, when the rain falls for 10.6 days and typically collects 1.3" (33mm) of precipitation.

What is the wettest month in Windham?

The month with the most rainfall in Windham, New Hampshire, is December, when the rain falls for 10.6 days and typically aggregates up to 2.87" (73mm) of precipitation.

What is the month with the shortest days in Windham?

With an average of 9h and 6min of daylight, December has the shortest days of the year in Windham.

Average temperature
Windham, NH

Average temperature - Windham, NH

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (32.2°F).

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).

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Average pressure
Windham, NH

Average pressure - Windham, 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).

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Average wind speed
Windham, NH

Average wind speed - Windham, NH

The windiest month (with the highest average wind speed) is January (9.2mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

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Average rainfall
Windham, NH

Average rainfall - Windham, NH

The wettest month (with the highest rainfall) is December (2.87").
The driest month (with the least rainfall) is September (1.3").

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Average rainfall days
Windham, NH

Average rainfall days - Windham, NH

The month with the highest number of rainy days is May (15.9 days).
The months with the least rainy days are January and February (7.6 days).

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Average snowfall
Windham, NH

Average snowfall - Windham, NH

The month with the highest snowfall is February (5.87").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Windham, NH

Average snowfall days - Windham, NH

The month with the highest number of snowfall days is January (8.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Windham, NH

Average daylight / Average sunshine - Windham, 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 month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days
Windham, NH

Average sunshine days - Windham, NH

The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is May (13.5 days).

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Average UV index
Windham, NH

Average UV index - Windham, NH

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).

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Average visibility
Windham, NH

Average visibility - Windham, NH

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

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Windham, New Hampshire, USA

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