Lebanon weather in May

In May, Lebanon sees average daytime highs of 66°F and overnight lows near 47°F, with 2.7 in of rain across 9.9 wet days and about 14.6 hours of daylight. It is the 5th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 63°F in the first days to 69°F by the end. The sky is clear or mostly clear about 22% of the time in May, and the air most often feels dry.

Daylight stretches from about 14 hours at the start of May to 15 h 06 min by month's end. Set against the rest of the year, May is Lebanon's 6th-clearest and 12th-windiest month. For the whole year in context, see Lebanon's year-round climate.

Daytime high
66°
5th warmest
Overnight low
47°
8th coldest
Rainfall
2.7 in
9.9 wet days
Daylight
14 h 36 min
4:50 AM – 7:26 PM
Cloud cover
64%
6th clearest
Wind
5 mph
12th windiest
Solar energy
5.67 kWh/m²
Travel score
6.0
out of 10

Lebanon is city in Oregon, USA.

Density
917/km²
people per km²
Founded
1878

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 63°F in the first days to 69°F by the end.

A typical May day in Lebanon reaches about 66°F in the afternoon and slips back to 47°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 56°F and 78°F. Set against its neighbours, May runs about 7°F warmer than April and about 6°F cooler than June.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
16344
26344
36344
46444
56445
66445
76445
86445
96545
106546
116546
126546
136546
146647
156647
166647
176647
186647
196747
206748
216748
226748
236748
246848
256849
266849
276849
286949
296949
306949
316949

How May really feels in Lebanon

Once humidity and wind are folded in, May averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Lebanon weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan48° / 36°6.616.31.491.4
Feb51° / 37°5.114.51.210.12.1
Mar55° / 39°5.716.60.711.62.9
Apr59° / 42°4.215.2013.24.0
May66° / 47°2.79.9014.66.0
Jun72° / 51°1.46.9015.37.2
Jul82° / 56°0.31.80157.8
Aug82° / 56°0.42013.97.6
Sep76° / 52°1.44.7012.38.0
Oct64° / 45°3.710.9010.75.6
Nov53° / 40°6.516.40.29.42.4
Dec47° / 36°7.516.71.38.71.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 15% of May, with mostly cloudy or overcast conditions the remaining 63%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13862
23862
33862
43961
54060
64060
74060
83961
93862
103862
113862
123664
133664
143664
153664
163565
173565
183565
193466
203565
213565
223664
233664
243763
253763
263862
273961
283961
294060
304060
314060

Chance of precipitation in May

Any precipitation

Lebanon gets around 2.7 in of rain over 9.9 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 33% and peaks near 38% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
138
237
336
435
534
633
733
833
932
1032
1132
1232
1332
1432
1532
1633
1733
1833
1933
2033
2133
2233
2332
2432
2531
2631
2731
2830
2930
3030
3130

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May lands in the dry band about 94% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19721
29721
39721
49721
59721
69721
79631
89631
99631
109541
119541
129541
139451
149550
159550
169460
179361
189361
199361
209271
219271
229271
239271
249271
259271
269271
279181
289181
299181
309181
319271

Wind in May

Winds average 5 mph in May, the calmest month.

Across May, daily wind ranges from about 5 mph on the calmest days to 5 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 hours at the start of May to 15 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over May. Sunrise moves from 5:10 AM to 4:37 AM, and sunset from 7:08 PM to 7:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.05:107:08
214.05:087:09
314.15:077:10
414.15:057:12
514.15:047:13
614.25:037:14
714.25:017:15
814.35:007:16
914.34:597:18
1014.44:577:19
1114.44:567:20
1214.44:557:21
1314.54:537:22
1414.54:527:23
1514.64:517:25
1614.64:507:26
1714.64:497:27
1814.74:487:28
1914.74:477:29
2014.74:467:30
2114.84:457:31
2214.84:447:32
2314.84:437:33
2414.94:427:35
2514.94:417:36
2614.94:407:37
2715.04:407:38
2815.04:397:38
2915.04:387:39
3015.04:377:40
3115.14:377:41

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.67 kWh/m².

For context, solar energy here swings from a low near 1.14 kWh/m² to a high of 7.23 kWh/m² in July across the year — May's 5.67 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.4Bright
45.4Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.9Bright
295.9Bright
305.9Bright
315.9Bright
Planning a trip in May

Hazard calendar for Lebanon

In seasonPeak

None of Lebanon's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Lebanon's rainy season runs October–April, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Lebanon?

Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.0
Sightseeing
5th-best month of the year
2.5
Beach & pool
5th-best month of the year

May is a reasonable time to visit Lebanon for sightseeing.

What to pack for Lebanon in May

From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In May, Lebanon sees daytime highs around 66°F and nights near 47°F. Worth packing: rain gear and sun protection. About 10 days see rain.

rain gearsun protection

UV index in Lebanon in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Lebanon peaks around July 16 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 16UV 8Dec 18UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5High
May8Very high
Jun7Very high
Jul8Very high
Aug7Very high
Sep5Moderate
Oct4Moderate
Nov1Low
Dec1Low

Air quality in Lebanon in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in Lebanon is worst in September — around 40 µg/m³ PM2.5 (poor), about 7.1× the cleanest month (January, 6 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodSep 1537 µg/m³Jan 186 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb8Good
Mar10Good
Apr11Good
May11Good
Jun8Good
Jul8Good
Aug16Moderate
Sep40Poor
Oct11Good
Nov11Good
Dec9Good
Location & terrain

Where is Lebanon?

Lebanon sits at 44.5°N, 122.9°W, 354 ft above sea level, in United States. The nearest listed city is Albany, 12 mi away.

Topography around Lebanon

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Lebanon.

Within 2 miles, the terrain around Lebanon has significant variations in elevation — a maximum elevation change of 902 ft around an average of 377 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,916 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 6,129 ft.

The land around Lebanon is covered by trees (35%), grassland (26%) and artificial surfaces (20%) within 2 miles, trees (42%) and cropland (36%) within 10 miles, and trees (74%) within 50 miles.

2 miles
902 ft
10 miles
1,916 ft
50 miles
6,129 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Albany 12 mi · Corvallis 17 mi · Four Corners 27 mi · Salem 29 mi · Hayesville 31 mi · Keizer 32 mi · Dallas 33 mi · Springfield 34 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Lebanon (44.5365°, -122.907°, elevation 354 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).