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Contents
- The climate of Lebanon
- The best time to visit Lebanon
- The worst time to visit Lebanon
- Spring weather in Lebanon
- Summer weather in Lebanon
- Autumn weather in Lebanon
- Winter weather in Lebanon
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The climate of Lebanon
Lebanon, Pennsylvania, USA, finds itself tucked within a predominately humid subtropical zone (Cfa according to the Köppen climate classification). Climate in this city is characterized by no dry season and relatively high temperature throughout the year. Delving into the climate data, there is a noticeable yearly pattern.
Temperature ranges are fairly wide in Lebanon, with the highest average temperature reaching up to 82°F (27.8°C) in July and the coldest plunge to 21.6°F (-5.8°C) in January. Humidity remains constant all year round, with values ranging from 76% in April to 81% during the months of February, May, June, and October. Rainfall is a regular occurrence in this city, with the highest average monthly rainfall of 2.13" (54mm) reported in August and the lowest, 0.94" (24mm), in February.
A unique weather pattern emerges in Lebanon's snowfall. It is minimal or non-existent from May to October and starts to pick up from November, peaking at 1.97" (50mm) in January. Lebanon enjoys modest sunshine hours per day, stretching from about 4.5 to 10.4 hours. Despite these conditions, UV index maintains low levels, rarely exceeding 4, with highest reading of 6 in May, June, and July. Cloud coverage is highest in February and December with cloud percentage of 51%.
Temperature ranges are fairly wide in Lebanon, with the highest average temperature reaching up to 82°F (27.8°C) in July and the coldest plunge to 21.6°F (-5.8°C) in January. Humidity remains constant all year round, with values ranging from 76% in April to 81% during the months of February, May, June, and October. Rainfall is a regular occurrence in this city, with the highest average monthly rainfall of 2.13" (54mm) reported in August and the lowest, 0.94" (24mm), in February.
A unique weather pattern emerges in Lebanon's snowfall. It is minimal or non-existent from May to October and starts to pick up from November, peaking at 1.97" (50mm) in January. Lebanon enjoys modest sunshine hours per day, stretching from about 4.5 to 10.4 hours. Despite these conditions, UV index maintains low levels, rarely exceeding 4, with highest reading of 6 in May, June, and July. Cloud coverage is highest in February and December with cloud percentage of 51%.
The best time to visit Lebanon
Analysis of climatic markers suggests spring (April to June) as the most favourable period for visiting Lebanon. Temperatures climb steadily from an average low of 41.4°F (5.2°C) to a comfortable 58.6°F (14.8°C). Rainfall is quite moderate, making the environment quite lush. Sunshine hours reach their peak, at an average of 9.8 hours per day, coupled with the longest daylight periods, stretching up to 15 hours in June.
The worst time to visit Lebanon
Based on the observed climate pattern, January appears to be the toughest for visitors. The city is in the throes of winter with the lowest average temperatures, dipping down to 21.6°F (-5.8°C). Snowfalls peak at an average of 1.97" (50mm) for the month and daylight hours are the shortest, at an average of just 9.7 hours per day.
Spring weather in Lebanon
Spring in Lebanon marks the shift from the cold winters to pleasant conditions. Starting at an average low temperature of 31.1°F (-0.5°C) in March, temperatures quickly rise up, reaching an average high of 68.7°F (20.4°C) in May. Rainfall is quite consistent during this season, with the highest spring rainfall recorded in May at 1.61" (41mm). Snowfall largely dissipates, closing out at 0.04" (1mm) in April and May.
Summer weather in Lebanon
Summer weather in Lebanon is characteristic of humid subtropical climate. Average high temperatures peak at 82°F (27.8°C) in July before tapering off slightly. Relative humidity stays around the 80% mark, leading to the warm, muggy feel typical of summer in this region. Rainfall peaks at 2.13" (54mm) in August making it the wettest month. Despite the high humidity and rainfall, summer offers the longest daylight hours, ranging from 14.4 to 15 hours.
Autumn weather in Lebanon
Autumn in Lebanon is a period of transition, with temperatures gradually falling from an average high of 73.8°F (23.2°C) in September to a much cooler 49.5°F (9.7°C) in November. During this season, there is a significant drop in rainfall from 1.42" (36mm) in October to 1.22" (31mm) in November, leading to dry, comfortable conditions. Daylight hours also decrease to an average of 10 hours per day in November.
Winter weather in Lebanon
Winter in Lebanon comes with cold temperatures and a fair amount of snow. Average low temperatures drop to their lowest in January at 21.6°F (-5.8°C). Snowfall sees a gradual increase from 0.16" (4mm) in October to reach its peak at 1.97" (50mm) in January. Despite the cold, sunny periods are not completely absent with average daily sunshine of 4.6 hours in December and January. However, daylight hours are shortest, averaging only 9.3 in December.
Weather in January
The year starts off with January weather in Lebanon, Pennsylvania bearing the brunt of winter. Wintry conditions are the norm with the temperature hovering from 21.6°F (-5.8°C) to 33.8°F (1°C), making it one of the coldest months of the year. Weather in January »
Weather in February
February weather signifies a gradual transition from the winter chill as the temperature value sees a slight increase. Predominant cloudy conditions lead to February witnessing a relatively higher humidity, making the cold weather feel even more biting. Weather in February »
Weather in March
March signifies the onset of spring in Lebanon, Pennsylvania. There is a notable change in the weather pattern as it shifts towards warmer temperatures, up to 46.9°F (8.3°C). Increased daylight hours are observed in March, a sure sign of the transition period between winter and spring. Weather in March »
Weather in April
As April sets in, residents of Lebanon, Pennsylvania embrace a full-fledged spring experience. The mercury goes significantly upwards, and the weather starts warming up to a comforting 59.4°F (15.2°C). Rainfall frequency increases, indicating the familiar April showers synonymous with spring. Weather in April »
Weather in May
May brings in the beautiful sunshine and pleasing temperatures, making it an ideal time for outdoor activities in Lebanon, Pennsylvania. Weather conditions prove consistently warmer, with temperatures climbing to a pleasant 68.7°F (20.4°C). Weather in May »
Weather in June
June signifies the advent of summer in Lebanon, Pennsylvania with the temperatures pushing towards the hotter range, increasing to a balmy 76.6°F (24.8°C). Longer sunny stretches dominate the weather pattern indicative of the shift from spring to summer. Weather in June »
Weather in July
The weather in Lebanon, Pennsylvania reaches its hottest in July, with temperatures hitting a year-high of 82°F (27.8°C). The transition to the heart of summer is marked by extended daylight hours, providing ample opportunity for sun-soaked outdoor activities. Weather in July »
Weather in August
The peak summer continues into August in Lebanon, Pennsylvania, with temperatures slightly dropping to 79.9°F (26.6°C). It is an opportune time for water-based activities, with the weather offering bright, sunny climates. The latter part of August signals the onset of late summer, characterized by increased cloud cover and rain. Weather in August »
Weather in September
The commencement of September sees a welcoming reduction in temperature, signaling the onset of fall in Lebanon, Pennsylvania. Daytime temperatures drop to a comfortable 73.8°F (23.2°C), accompanied by shorter daylight hours. Weather in September »
Weather in October
October in Lebanon, Pennsylvania marks a full transition into fall with significant temperature drop to 61.7°F (16.5°C). The weather during this period showcases what can be rightly termed as "crisp autumn". Bright fall colors come to the forefront as the landscape transforms under frequent bouts of rainfall. Weather in October »
Weather in November
The transitional period of November brings the onset of winter, with temperatures taking a dip to a cooler 49.5°F (9.7°C). This period is marked by an increasing frequency of early frosts, emphasizing the shift from fall to winter. Weather in November »
Weather in December
The weather in December in Lebanon, Pennsylvania solidifies winter's hold, with temperatures decreasing noticeably to 40.3°F (4.6°C). It is a month distinguished by its overcast skies, shorter daylight hours, and a general wintry atmosphere. Weather in December »
Updated: Jun 4, 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
What are the coldest months?
January proves to be the coldest month, recording an average maximum temperature of 33.8°F (1°C) and a minimum temperature of 21.6°F (-5.8°C).
How many days does it rain?
In Lebanon, during the entire year, the rain falls for 137.4 days and collects up to 16.26" (413mm) of precipitation.
When does it snow?
January through May, October through December are months with snowfall.
What is the snowiest month?
January is the month with the most snowfall in Lebanon. Snow falls for 5.2 days and accumulates 1.97" (50mm) of snow.
How many days does it snow?
Throughout the year, there are 19.5 snowfall days, and 6.69" (170mm) of snow is accumulated.
When is the lowest UV index?
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
What is the most humid month?
February, May and October, with an average relative humidity of 81%, are most humid months.
What is the driest month?
February is the month with the least rainfall. Rain falls for 7.8 days and accumulates 0.94" (24mm) of precipitation.
What is the month with the least sunshine?
With an average of 4.5h of sunshine, February has the least sunshine of the year.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Lebanon, 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?
With an average relative humidity of 76%, April is the least humid month in Lebanon.
What are the months with the highest UV index?
The months with the highest UV index are May through July, with an average maximum UV index of 6.
When it does not snow?
In Lebanon, snow does not fall in June through September.
When are the longest days?
With an average of 15h and 0min of daylight, June has the longest days of the year.
What time of the year is the hottest?
In Lebanon, July records the average highest temperatures, peaking at 82°F (27.8°C) and reaching a low of 63.1°F (17.3°C).
What month has the most sunshine?
July has the most sunshine of the year, with an average of 10.4h of sunshine.
What is the rainiest month?
August is the month with the most rainfall. Rain falls for 14.7 days and accumulates 2.13" (54mm) of precipitation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 24min of daylight.
Average temperature
Lebanon, PA
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.8°F).
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure
Lebanon, PA
- Average pressure in January:
30.09"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.99"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
Lebanon, PA
- Average wind speed in January:
8.5mph - Average wind speed in February:
8.6mph - Average wind speed in March:
8.8mph - Average wind speed in April:
8.6mph - Average wind speed in May:
6.6mph - Average wind speed in June:
6.1mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity
Lebanon, PA
The months with the highest relative humidity are February, May and October (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall
Lebanon, PA
- Average rainfall in January:
1.06" - Average rainfall in February:
0.94" - Average rainfall in March:
1.18" - Average rainfall in April:
1.26" - Average rainfall in May:
1.61" - Average rainfall in June:
1.38"
- Average rainfall in July:
1.93" - Average rainfall in August:
2.13" - Average rainfall in September:
1.02" - Average rainfall in October:
1.42" - Average rainfall in November:
1.22" - Average rainfall in December:
1.1"
The wettest month (with the highest rainfall) is August (2.13").
The driest month (with the least rainfall) is February (0.94").
Average rainfall days
Lebanon, PA
- Average rainfall days in January:
6.7 days - Average rainfall days in February:
7.8 days - Average rainfall days in March:
10.9 days - Average rainfall days in April:
12.7 days - Average rainfall days in May:
15.9 days - Average rainfall days in June:
14.8 days
- Average rainfall days in July:
15.6 days - Average rainfall days in August:
14.7 days - Average rainfall days in September:
10.5 days - Average rainfall days in October:
11.4 days - Average rainfall days in November:
7.2 days - Average rainfall days in December:
9.2 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (6.7 days).
Average snowfall
Lebanon, PA
- Average snowfall in January:
1.97" - Average snowfall in February:
1.5" - Average snowfall in March:
1.65" - Average snowfall in April:
0.04" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is January (1.97").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Lebanon, PA
- Average snowfall days in January:
5.2 days - Average snowfall days in February:
5.1 days - Average snowfall days in March:
4.2 days - Average snowfall days in April:
0.3 days - Average snowfall days in May:
0.2 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:
0.1 days - Average snowfall days in November:
1.1 days - Average snowfall days in December:
3.3 days
The month with the highest number of snowfall days is January (5.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Lebanon, PA
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 2min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
4h and 4min - Average sunshine in February:
4h and 3min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 1min - Average sunshine in May:
8h and 1min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
9h and 5min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 2min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days
Lebanon, PA
- Average sunshine days in January:
20.3 days - Average sunshine days in February:
15.3 days - Average sunshine days in March:
16.3 days - Average sunshine days in April:
15.3 days - Average sunshine days in May:
11.5 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
11.8 days - Average sunshine days in August:
13.4 days - Average sunshine days in September:
16.5 days - Average sunshine days in October:
17.5 days - Average sunshine days in November:
19.6 days - Average sunshine days in December:
18.7 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is May (11.5 days).
Average UV index
Lebanon, PA
The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
Lebanon, PA
The months with the most cloud cover are February and December (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility
Lebanon, PA
The months with the highest visibility are January, February, March, April, June, July, November and December (6mi).
The months with the lowest visibility are May, August, September and October (5mi).
Lebanon, Pennsylvania, USA
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