Climate and monthly weather forecastLebanon, NH
Lebanon, New Hampshire, USA - Climate and weather forecast by month. Detailed climate information with charts - average monthly weather with temperature, pressure, humidity, precipitation, wind, daylight, sunshine, visibility, and UV index data. One prominent weather trait in Lebanon is the fluctuating daylight duration, spanning from 9 hours in the darker months of December and January, up to 15.4 hours in the sunny month of June. Daylight and sunshine hours also increase consistently during these months, making spring a pleasant time in Lebanon.
Climate and monthly weather forecast
The climate of Lebanon
Bearing the Dfb classification under the Köppen climate system, the city of Lebanon in New Hampshire, USA features a humid continental climate with no dry season and warm summers. This classification stems from its geographical location, nestled in the northeastern part of the country.Lebanon undergoes distinctive seasonal changes throughout the year, with varying temperatures, humidity, and precipitation levels. In terms of temperatures, the span starts from 77.9°F (25.5°C) at the peak of July's heat, dwindling down to 12.4°F (-10.9°C) in February's biting chill. Consequently, warmth in Lebanon primarily dwells from May through September, whilst the rest of the year tends towards the colder side.
Precipitation unfolds quite evenly distributed all year round, with October witnessing the heaviest rainfall at 2.87" (73mm). This regular rainfall maintains a relatively high humidity level, averaging from 75% in May to 86% in January and February. Notably, snowfalls punctuate the frigid months from November to April, peaking in February at about 9.29" (236mm).
One prominent weather trait in Lebanon is the fluctuating daylight duration, spanning from 9 hours in the darker months of December and January, up to 15.4 hours in the sunny month of June. Similarly, the city's sunshine hours vary, reaching the maximum of 10.1 hours in August and hitting the minimum of 3.6 hours in February.
The best time to visit Lebanon
Depending on visitor preferences and planned activities, the golden time to visit Lebanon varies. For those inclined towards warmer weather, seeking to enjoy outdoor activities, the sunny months of June, July, and August provide the most appealing conditions. These months bask in the warmest temperatures, ranging from 64.9°F (18.3°C) to 77.9°F (25.5°C). Add in the longest daylight hours, averaging from 14.7 hours to 15.4 hours, and the gracious presence of the sun, accumulating to up to 10.1 hours per day in August.The worst time to visit Lebanon
For those averse to frigid temperatures and snow, the period from late November through March encompasses the coldest months in Lebanon. The thermometer barely rises above freezing, with temperatures fluctuating from 21.6°F (-5.8°C) to 30.7°F (-0.7°C). Snow blankets the ground, the highest accumulation being in February where it reaches 9.29" (236mm). The daylight during this period is also notably short, averaging only about 9 hours.Spring weather in Lebanon
Spring in Lebanon spans from March through May, commencing with mild temperatures in March, 36.1°F (2.3°C). April and May progressively warm up to reach 50.4°F (10.2°C) and 64.9°F (18.3°C) respectively. Rainfall during this period elevates, reaching a peak of 2.44" (62mm) in April. Though snowfall is present at the beginning of spring, it gradually decreases to just 0.43" (11mm) in May. Daylight and sunshine hours also increase consistently during these months, making spring a pleasant time in Lebanon.Summer weather in Lebanon
Summer in Lebanon, running from June to August, brings warmth and abundant sunshine. Temperatures range from 68.7°F (20.4°C) to 77.9°F (25.5°C), with the longest daylight hours and the maximum hours of sunshine. Despite prevalent summer heat, the rainfall stays relatively high, reaching 2.64" (67mm) in June and averaging just below 2" (51mm) in the following months.Autumn weather in Lebanon
Autumn gradually cools down Lebanon from September to November. September witnesses a marked decrease in temperature to 68.7°F (20.4°C), thriving down to 42.3°F (5.7°C) by November. October experiences the heaviest rainfall, totaling 2.87" (73mm). Sunshine hours and daylight duration decrease compared to summer, yet remain consistent enough to enjoy the beautiful fall foliage.Winter weather in Lebanon
Winter in Lebanon is notably cold, with temperatures continually under freezing from December until February, varying between 12.4°F (-10.9°C) in February and 30.7°F (-0.7°C) in December. The city experiences snowfall during this period with profound accumulation, peaking in February at 9.29" (236mm). Daylight hours are at their shortest from 9.4 hours in January to 9.7 hours in December, and sunshine is also deficient at its lowest levels, reaching 4 hours per day.Weather in January
Declining daylight hours characterize January in Lebanon, New Hampshire, with the shortest daylight period of the year. January has abundant snowfall with up to 7.01" (178mm) accumulating during this winter month. Despite the heavy snowfall, the city's residents can still experience some sunshine, although it is minimal. Weather in January »Weather in February
As the city moves deeper into winter, February follows January's trend of cold, snowy conditions. Snow increases during February, reaching a peak of 9.29" (236mm). However, the city still experiences a sufficient amount of sunshine hours despite the additional blanket of snow. Weather in February »Weather in March
March indicates the commencement of a transition period from winter to spring in Lebanon. With a decrease in snowfall to 6.22" (158mm), signs of a thawing landscape begin to emerge gradually. An increased daylight duration brightens up the city compared to the preceding winter months. Weather in March »Weather in April
April follows the spring weather trend, witnessing a noticeable rise in temperatures. The snow gives way to rainfall, which peaks at 2.44" (62mm) in April. Concurrently, the hours of daylight continue to extend, allowing more time for outdoor activities. Weather in April »Weather in May
May sees further continuation of the spring season in Lebanon, with milder weather settling in. The drop of snowfall to a barely traceable 0.43" (11mm) confirms the winter's conclusion. Longer daylight hours grace the city, warming the atmosphere and helping the vegetation to flourish. Weather in May »Weather in June
June in Lebanon marks the arrival of summer, with longer daylight hours and higher temperatures. The absence of snowfall in June confirms the complete transition into the summer season. Extended sunshine hours provide plenty of warmth, making it perfect for outdoor activities. Weather in June »Weather in July
July represents the height of summer in Lebanon, with temperatures peaking at this time of the year. The city warms further with the mercury touching 77.9°F (25.5°C), providing the perfect weather for those looking to soak up the sun. Weather in July »Weather in August
August is similar to July in terms of weather, with high temperatures and long daylight hours. Nevertheless, there is a slight cooling with the highest temperature dipping to 76.5°F (24.7°C). August continues to deliver generous sunshine hours, ensuring plenty of warmth and light. Weather in August »Weather in September
September signals the beginning of fall in Lebanon, with a gentle decrease in temperature. However, the city continues to remain snow-free in September, marking an extension of the summer warmth. The daylight duration begins its downward trend, eventually matching the average hours of darkness. Weather in September »Weather in October
October sees a significant shift in weather as the heart of autumn sets in Lebanon. The city experiences a dramatic escalation in rainfall, peaking at 2.87" (73mm) this month. Despite the increased rainfall, October still provides an ample amount of sunshine, brightening the colorful fall foliage. Weather in October »Weather in November
November brings a stark transition from fall to winter in Lebanon. As the temperatures continue to cool, the month witnesses a snowfall of 3.31" (84mm), an indicator of the impending winter season. The landscape shifts from vibrant to a frosty façade braided with sporadic snowfall. Weather in November »Weather in December
Rounding off the year, December in Lebanon marks the onset of winter. The city witnesses a growing frequency of snowfall, reaching up to 6.3" (160mm). Daylight diminishes further, making way for longer nights and a marked evening chill. Weather in December »Updated: Jul 24, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January is the month when Lebanon sees the average lowest temperatures, with a high of 25.2°F (-3.8°C) and a low of 12.4°F (-10.9°C).
January and February, with an average relative humidity of 86%, are most humid months in Lebanon, New Hampshire.
In Lebanon, New Hampshire, during the entire year, the rain falls for 156.4 days and collects up to 26.14" (664mm) of precipitation.
January through May, October through December are months with snowfall.
Throughout the year, there are 74.2 snowfall days, and 35.67" (906mm) of snow is accumulated.
February is the month with the most snowfall. Snow falls for 15.9 days and accumulates 9.29" (236mm) of snow.
With an average of 3.6h of sunshine, February has the least sunshine of the year.
February and December, with an average maximum UV index of 1, are months with the lowest UV index.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, 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.
With an average relative humidity of 75%, May is the least humid month.
May through August, with an average maximum UV index of 5, are months with the highest UV index.
June through September are months without snowfall.
With an average of 15h and 24min of daylight, June has the longest days of the year.
Lebanon's July weather, marked by an average high temperature of 77.9°F (25.5°C) and an average low temperature of 56.1°F (13.4°C), is the warmest in the year.
With an average of 10.1h of sunshine, August has the most sunshine of the year.
September is the month with the least rainfall. Rain falls for 11.3 days and accumulates 1.77" (45mm) of precipitation.
October is the month with the most rainfall. Rain falls for 15.2 days and accumulates 2.87" (73mm) of precipitation.
The month with the shortest days is December, with an average of 9h and 0min of daylight.
Average temperature
Lebanon, NH
The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is January (25.2°F).
The month with the highest average low temperature is July (56.1°F).
The coldest month (with the lowest average low temperature) is January (12.4°F).
Average pressure
Lebanon, NH
- Average pressure in January:
30.02"Hg - Average pressure in February:
30"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.99"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.04"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Lebanon, NH
- Average wind speed in January:
7.3mph - Average wind speed in February:
7.3mph - Average wind speed in March:
7.3mph - Average wind speed in April:
7.4mph - Average wind speed in May:
6.3mph - Average wind speed in June:
5.5mph
- Average wind speed in July:
5.1mph - Average wind speed in August:
4.8mph - Average wind speed in September:
5.2mph - Average wind speed in October:
6mph - Average wind speed in November:
6.5mph - Average wind speed in December:
6.8mph
The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity
Lebanon, NH
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is May (75%).
Average rainfall
Lebanon, NH
- Average rainfall in January:
1.85" - Average rainfall in February:
1.89" - Average rainfall in March:
1.93" - Average rainfall in April:
2.44" - Average rainfall in May:
2.28" - Average rainfall in June:
2.64"
- Average rainfall in July:
2.32" - Average rainfall in August:
1.89" - Average rainfall in September:
1.77" - Average rainfall in October:
2.87" - Average rainfall in November:
2.01" - Average rainfall in December:
2.24"
The wettest month (with the highest rainfall) is October (2.87").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days
Lebanon, NH
- Average rainfall days in January:
8.6 days - Average rainfall days in February:
8.8 days - Average rainfall days in March:
11.8 days - Average rainfall days in April:
15.9 days - Average rainfall days in May:
16.3 days - Average rainfall days in June:
15.4 days
- Average rainfall days in July:
15.7 days - Average rainfall days in August:
15.4 days - Average rainfall days in September:
11.3 days - Average rainfall days in October:
15.2 days - Average rainfall days in November:
11.4 days - Average rainfall days in December:
10.6 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is January (8.6 days).
Average snowfall
Lebanon, NH
- Average snowfall in January:
7.01" - Average snowfall in February:
9.29" - Average snowfall in March:
6.22" - Average snowfall in April:
2.8" - Average snowfall in May:
0.43" - Average snowfall in June:
0"
The month with the highest snowfall is February (9.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Lebanon, NH
- Average snowfall days in January:
16.3 days - Average snowfall days in February:
15.9 days - Average snowfall days in March:
14.3 days - Average snowfall days in April:
5.4 days - Average snowfall days in May:
0.6 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
1.1 days - Average snowfall days in November:
6.5 days - Average snowfall days in December:
14.1 days
The month with the highest number of snowfall days is January (16.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Lebanon, NH
- Average daylight in January:
9h and 24min - Average daylight in February:
10h and 30min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 30min - Average daylight in May:
14h and 42min - Average daylight in June:
15h and 24min
- Average daylight in July:
15h and 6min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 42min - Average daylight in December:
9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in January:
3h and 54min - Average sunshine in February:
3h and 36min - Average sunshine in March:
5h and 0min - Average sunshine in April:
7h and 6min - Average sunshine in May:
8h and 12min - Average sunshine in June:
8h and 36min
- Average sunshine in July:
9h and 48min - Average sunshine in August:
10h and 6min - Average sunshine in September:
8h and 18min - Average sunshine in October:
5h and 18min - Average sunshine in November:
4h and 54min - Average sunshine in December:
4h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days
Lebanon, NH
- Average sunshine days in January:
11.8 days - Average sunshine days in February:
9.8 days - Average sunshine days in March:
9.7 days - Average sunshine days in April:
11.2 days - Average sunshine days in May:
12.3 days - Average sunshine days in June:
12 days
- Average sunshine days in July:
13.4 days - Average sunshine days in August:
13.2 days - Average sunshine days in September:
16.3 days - Average sunshine days in October:
12.3 days - Average sunshine days in November:
13.5 days - Average sunshine days in December:
11.8 days
The month with the most sunshine days is September (16.3 days).
The month with the least sunshine days is March (9.7 days).
Average UV index
Lebanon, NH
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover
Lebanon, NH
The month with the most cloud cover is February (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility
Lebanon, NH
The months with the highest visibility are April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are January, February, March and September (4mi).
