Climate and monthly weather forecastLebanon, OR
Climate and monthly weather forecast
The climate of Lebanon
Lebanon, Oregon, situated within the United States, showcases a warm-summer Mediterranean climate, denoted as 'Csb' under Köppen climate classification. A hint of predictability accompanies this climate, yet an intriguing spectrum of seasonal variations in weather conditions can be observed throughout the year.Temperature in Lebanon oscillates gently over the year. The heat peaks in July and August with an average high of 81.1°F (27.3°C), and descends to its low in December with average low of 34.2°F (1.2°C). The degree of humidity as well as cloud coverage can also fluctuate, with the highest recorded in December and January at 86% and the lowest in August at 66%. Such data indicates an air saturated with moisture during winters while relatively drier conditions during summers.
Precipitation patterns reveal interesting dynamics. Rainfall reaches its zenith in December with an average of 4.41" (112mm) spread over 18 days, and drops to its nadir in July with a meager 0.24" (6mm) on an average of 3.8 days. As with snowfall, the frequency and volume are minimal, with the maximum being 2.13" (54mm) in February, taking place over 2.5 days.
A peculiar sunshine duration pattern characterizes Lebanon. Longest daylight extends up to 15.5 hours in June, and shrinks to 8.9 hours in December. Correspondingly, sunshine hours peak in July through August, from 11.1 hours to 11.2 hours a day. On the other hand, wind speed remains relatively stable throughout the year, around 5mph (8km/h).
The best time to visit Lebanon
Ideal time to explore Lebanon would fall between June and August when the city experiences its warmest temperatures and enjoys the maximum sunlight duration. It is worth mentioning that during these months, rainfall is insignificant permitting outdoor activities without interruptions.The worst time to visit Lebanon
Travelers may want to avoid a trip to Lebanon between November and February. The region grapples with lower temperatures, diminished daylight hours, and increased precipitation, especially rain, during these months, which might hinder outdoor tourism activities.Spring weather in Lebanon
Spring arrives in Lebanon from March until May with temperatures slowly climbing from an average high of 51.6°F (10.9°C) in March to 65.3°F (18.5°C) by May. During this period, relative humidity drops and rainfall gradually decreases while sunshine duration increases, making conditions pleasant for outdoor activities.Summer weather in Lebanon
Summer, extending from June to August, underlines the peak of Lebanon's warm weather with temperatures reaching up to 81.1°F (27.3°C). It is the sunniest period of the year with maximum daylight hours reaching up to 15.5 hours in June. Additionally, during these months, Lebanon experiences the lowest precipitation, signifying a perfect time for outdoor activities.Autumn weather in Lebanon
Autumn in Lebanon, spanning from September to November, is identified by a gradual descent in temperatures down from an average high of 73.4°F (23°C) in September to a moderate 51.4°F (10.8°C) in November. Along with this, a noticeable increase in rainfall across the period can be observed.Winter weather in Lebanon
Winter in Lebanon, from December to February, showcases the coldest months with temperatures dropping to an average low of 34.2°F (1.2°C) in December. Together with lower temperatures, the duration of daylight shrinks to its minimum in December at 8.9 hours. Rainfall becomes more frequent in this season, whereas snowfall, however, remains quite minimal.Weather in January
Weather pattern in Lebanon, Oregon transitions into the new year with a continuation of cool temperatures, overcast skies, and plenty of precipitation. A rise in the average high temperature occurs, peaking at 47.7°F (8.7°C). Weather in January »Weather in February
February in Lebanon exhibits gradual alterations in weather patterns, while remaining predominantly cloudy and rain-laden. The most notable variation is observed in snowfall — from 1.02" (26mm) in January to 2.13" (54mm) in February. Weather in February »Weather in March
Switching to March, the chill in Lebanon's atmosphere begins to wane, paving the way for a warmer climate. Increase in average high and low temperatures by about 3°F (-16.1°C) from the prior month makes the transition apparent. Weather in March »Weather in April
As Spring advances in Lebanon, the town begins to experience a distinct shift in weather patterns. An increased average high temperature signals the waning of cooler temperatures, climbing from 51.6°F (10.9°C) in March to 57.6°F (14.2°C) in April. Weather in April »Weather in May
May carries with it significantly warmer weather in Lebanon. It witnesses a dramatic reduction in rainfall from the preceding months, experiencing a substantial dip to 1.85" (47mm). The increasing temperature also makes itself evident, as it rises above the 60°F (15.6°C) mark for the average high. Weather in May »Weather in June
June is a transition period into the warmer months in Lebanon. From 65.3°F (18.5°C) to 70.9°F (21.6°C), the jump in the average high temperature is evident. This mid-year month wins the title for the longest days, with an abundance of sunshine and maximum daylight hours. Weather in June »Weather in July
The summer heat manifests fully in July as Lebanon witnesses the highest average temperatures of the year. Peaking at 79.5°F (26.4°C), the upward temperature trend from previous months reaches its zenith. Combined with this, July experiences minimum rainfall, reducing to a sweat 0.24" (6mm), thus becoming the driest month of the year. Weather in July »Weather in August
August continues to showcase the peak summer weather in Lebanon. The average high temperature rises slightly, registering a pinnacle at 81.1°F (27.3°C). Although the moisture content increases slightly with an increment to 0.31" (8mm) of rainfall, the weather remains predominantly dry and hot. Weather in August »Weather in September
Fall starts to make its presence known in September in Lebanon, as the weather starts cooling down. From 81.1°F (27.3°C) in August, a downturn in average high temperatures is noticeable, dropping to 73.4°F (23°C). Besides the temperature, the sunshine duration also dwindles, giving way to longer nights. Weather in September »Weather in October
Lebanon greets autumn in October with temperatures lowering yet further. The most remarkable feature of the month is a sharp increase in the average monthly rainfall to 2.68" (68mm). Cooler temperatures accompanied with decreased sunshine hours prevail, with many a leaf turning autumnal hues. Weather in October »Weather in November
As Lebanon, Oregon transitions into late Autumn, weather changes become more noticeable. Notably, the average high temperature further declines to 51.4°F (10.8°C), manifesting November as one of the cooler months in the year. Weather in November »Weather in December
December, the final month of the year, brings with it the coldest temperatures and the highest rainfall averages. The weather in December witnesses a significant increase in precipitation, leading to the peak monthly rainfall average of 4.41" (112mm). Weather in December »Updated: Aug 29, 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 through March and December, with an average relative humidity of 86%, are most humid months in Lebanon, Oregon.
In Lebanon, during the entire year, the rain falls for 163.3 days and collects up to 29.92" (760mm) of precipitation.
January through March, November and December are months with snowfall.
In Lebanon, during the entire year, snow falls for 5.6 days and aggregates up to 4.09" (104mm) of snow.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
The month with the most snowfall is February, when snow falls for 2.5 days and typically aggregates up to 2.13" (54mm) of snow.
The month with the least sunshine is February, with an average of 4.2h of sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.
In Lebanon, snow does not fall in April through October.
With an average of 15h and 30min of daylight, June has the longest days of the year.
July is the month with the least rainfall. Rain falls for 3.8 days and accumulates 0.24" (6mm) of precipitation.
The month with the highest UV index is July, with an average maximum UV index of 6.
August is the warmest month of the year, registering average temperatures as high as 81.1°F (27.3°C) and as low as 51.8°F (11°C).
With an average relative humidity of 66%, August is the least humid month.
August has the most sunshine of the year, with an average of 11.2h of sunshine.
The coldest month is December, with an average high-temperature of 45.3°F (7.4°C) and an average low-temperature of 34.2°F (1.2°C).
December is the month with the most rainfall. Rain falls for 18 days and accumulates 4.41" (112mm) of precipitation.
With an average of 8h and 54min of daylight, December has the shortest days of the year.
Average temperature
Lebanon, OR
The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (45.3°F).
The month with the highest average low temperature is August (51.8°F).
The coldest month (with the lowest average low temperature) is December (34.2°F).
Average pressure
Lebanon, OR
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
30.07"Hg - Average pressure in May:
30.03"Hg - Average pressure in June:
30.03"Hg
- Average pressure in July:
30.03"Hg - Average pressure in August:
30.01"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed
Lebanon, OR
- Average wind speed in January:
5.1mph - Average wind speed in February:
5mph - Average wind speed in March:
5.1mph - Average wind speed in April:
4.7mph - Average wind speed in May:
4.3mph - Average wind speed in June:
4.2mph
The windiest months (with the highest average wind speed) are January and March (5.1mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity
Lebanon, OR
The months with the highest relative humidity are January, February, March and December (86%).
The month with the lowest relative humidity is August (66%).
Average rainfall
Lebanon, OR
- Average rainfall in January:
4.09" - Average rainfall in February:
3.43" - Average rainfall in March:
3.7" - Average rainfall in April:
3.07" - Average rainfall in May:
1.85" - Average rainfall in June:
1.34"
- Average rainfall in July:
0.24" - Average rainfall in August:
0.31" - Average rainfall in September:
1.5" - Average rainfall in October:
2.68" - Average rainfall in November:
3.31" - Average rainfall in December:
4.41"
The wettest month (with the highest rainfall) is December (4.41").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days
Lebanon, OR
- Average rainfall days in January:
17.4 days - Average rainfall days in February:
16.9 days - Average rainfall days in March:
20.1 days - Average rainfall days in April:
17.8 days - Average rainfall days in May:
13.3 days - Average rainfall days in June:
11 days
- Average rainfall days in July:
3.8 days - Average rainfall days in August:
3.8 days - Average rainfall days in September:
8.8 days - Average rainfall days in October:
14.4 days - Average rainfall days in November:
18 days - Average rainfall days in December:
18 days
The month with the highest number of rainy days is March (20.1 days).
The months with the least rainy days are July and August (3.8 days).
Average snowfall
Lebanon, OR
The month with the highest snowfall is February (2.13").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Lebanon, OR
- Average snowfall days in January:
1.1 days - Average snowfall days in February:
2.5 days - Average snowfall days in March:
1 days - Average snowfall days in April:
0.2 days - Average snowfall days in May:
0 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 days - Average snowfall days in November:
0.1 days - Average snowfall days in December:
0.7 days
The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Lebanon, OR
- Average daylight in January:
9h and 18min - 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 48min - Average daylight in June:
15h and 30min
- Average daylight in July:
15h and 6min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 36min - Average daylight in December:
8h and 54min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in January:
4h and 18min - Average sunshine in February:
4h and 12min - Average sunshine in March:
5h and 36min - Average sunshine in April:
7h and 6min - Average sunshine in May:
8h and 30min - Average sunshine in June:
9h and 24min
- Average sunshine in July:
11h and 6min - Average sunshine in August:
11h and 12min - Average sunshine in September:
9h and 24min - Average sunshine in October:
5h and 30min - Average sunshine in November:
4h and 54min - Average sunshine in December:
4h and 18min
The month with the most sunshine is August (Average sunshine: 11h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days
Lebanon, OR
- Average sunshine days in January:
12.3 days - Average sunshine days in February:
9.5 days - Average sunshine days in March:
9.1 days - Average sunshine days in April:
10 days - Average sunshine days in May:
15.5 days - Average sunshine days in June:
17 days
- Average sunshine days in July:
25.6 days - Average sunshine days in August:
25.3 days - Average sunshine days in September:
19.3 days - Average sunshine days in October:
15.2 days - Average sunshine days in November:
11.1 days - Average sunshine days in December:
11.6 days
The month with the most sunshine days is July (25.6 days).
The month with the least sunshine days is March (9.1 days).
Average UV index
Lebanon, OR
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Lebanon, OR
The month with the most cloud cover is February (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility
Lebanon, OR
The months with the highest visibility are July, August and September (6mi).
The month with the lowest visibility is February (4mi).
