Klamath Falls weather in May

In May, Klamath Falls sees average daytime highs of 65°F and overnight lows near 41°F, with 1.7 in of precipitation across 8.3 wet days and about 14.4 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 61°F in the first days to 69°F by the end. The sky is clear or mostly clear about 34% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 48 min at the start of May to 14 h 48 min by month's end. Set against the rest of the year, May is Klamath Falls's 6th-clearest and 2nd-windiest month. For the whole year in context, see Klamath Falls's year-round climate.

Daytime high
65°
5th warmest
Overnight low
41°
8th coldest
Precipitation
1.7 in
8.3 wet days
Daylight
14 h 24 min
4:52 AM – 7:15 PM
Cloud cover
54%
6th clearest
Wind
5 mph
2nd windiest
Solar energy
6.82 kWh/m²
Travel score
6.2
out of 10

Klamath Falls is city in and county seat of Klamath County, Oregon, United States.

Density
400/km²
people per km²
Founded
1905

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 61°F in the first days to 69°F by the end.

A typical May day in Klamath Falls reaches about 65°F in the afternoon and slips back to 41°F overnight — a 23°F spread between the day's warmth and the night's chill. On most days the high lands between 51°F and 79°F. Set against its neighbours, May runs about 10°F warmer than April and about 9°F cooler than June.

20°40°60°80°151015202531
Avg high (°F)Avg low (°F)
16138
26138
36138
46238
56239
66239
76239
86340
96340
106340
116440
126440
136441
146441
156441
166541
176542
186542
196542
206642
216642
226643
236743
246743
256743
266844
276844
286844
296944
306944
316945

How May really feels in Klamath Falls

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.

Klamath Falls weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan39° / 26°3.211.89.59.30.0
Feb43° / 27°2.5108.410.30.4
Mar48° / 30°2.812.1811.61.8
Apr55° / 34°2.010.14.513.13.5
May65° / 41°1.78.31.114.46.2
Jun74° / 47°0.94.70.1157.9
Jul84° / 55°0.32.1014.87.1
Aug83° / 55°0.41.8013.77.4
Sep76° / 48°0.52.6012.38.6
Oct62° / 40°1.45.7110.86.1
Nov47° / 32°2.79.75.59.61.4
Dec38° / 26°3.912.410.490.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 18% of May, with mostly cloudy or overcast conditions the remaining 48%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15248
25347
35347
45347
55347
65248
75248
85149
95050
105050
114951
125050
135050
144951
155050
164951
175050
185050
195050
205149
215248
225347
235446
245446
255545
265545
275644
285644
295743
305743
315743

Chance of precipitation in May

Any precipitationSnow

Klamath Falls gets around 1.7 in of rain and snow over 8.3 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 27% and peaks near 28% on the wettest days, and about 1 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1267
2256
3256
4256
5255
6255
7255
8265
9265
10265
11264
12274
13274
14274
15274
16284
17284
18284
19284
20283
21283
22283
23283
24282
25282
26272
27272
28271
29261
30261
31251

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 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in May

Winds average 5 mph in May.

Across May, daily wind ranges from about 5 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
15calm
26calm
36calm
46calm
56calm
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 13 h 48 min at the start of May to 14 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over May. Sunrise moves from 5:10 AM to 4:40 AM, and sunset from 6:59 PM to 7:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.85:106:59
213.95:097:00
313.95:077:01
413.95:067:02
514.05:057:03
614.05:037:04
714.15:027:05
814.15:017:06
914.15:007:08
1014.24:587:09
1114.24:577:10
1214.24:567:11
1314.34:557:12
1414.34:547:13
1514.44:537:14
1614.44:527:15
1714.44:517:16
1814.54:507:17
1914.54:497:18
2014.54:487:19
2114.64:477:20
2214.64:467:21
2314.64:457:22
2414.64:447:23
2514.74:447:24
2614.74:437:25
2714.74:427:26
2814.84:427:27
2914.84:417:28
3014.84:407:28
3114.84:407:29

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.82 kWh/m².

For context, solar energy here swings from a low near 1.73 kWh/m² to a high of 8.03 kWh/m² in July across the year — May's 6.82 kWh/m² falls in the middle.

02468151015202531
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.6Intense
46.6Intense
56.6Intense
66.6Intense
76.7Intense
86.7Intense
96.7Intense
106.7Intense
116.7Intense
126.7Intense
136.7Intense
146.7Intense
156.8Intense
166.8Intense
176.8Intense
186.8Intense
196.8Intense
206.9Intense
216.9Intense
226.9Intense
237.0Intense
247.0Intense
257.0Intense
267.1Intense
277.1Intense
287.1Intense
297.2Intense
307.2Intense
317.2Intense
Planning a trip in May

Hazard calendar for Klamath Falls

In seasonPeak

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

Klamath Falls's rainy season runs November–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 Klamath Falls?

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

6.2
Sightseeing
5th-best month of the year
2.3
Beach & pool
5th-best month of the year

May is a reasonable time to visit Klamath Falls for sightseeing.

What to pack for Klamath Falls in May

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

In May, Klamath Falls sees daytime highs around 65°F and nights near 41°F. Pack sun protection. Worth having: a warm layer and rain gear. About 8 days see rain.

sun protectiona warm layerrain gear

UV index in Klamath Falls in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Klamath Falls peaks around July 11 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 11UV 10Dec 12UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5High
Apr6High
May9Very high
Jun9Very high
Jul10Very high
Aug8Very high
Sep6High
Oct5Moderate
Nov2Low
Dec2Low

Air quality in Klamath Falls 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 Klamath Falls is worst in July — around 40 µg/m³ PM2.5 (poor), about 7.4× the cleanest month (January, 5 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodPoorModerateGoodJul 2139 µg/m³Jan 186 µg/m³
PM2.5 (µg/m³)Level
Jan5Good
Feb8Good
Mar9Good
Apr14Moderate
May9Good
Jun7Good
Jul40Poor
Aug33Moderate
Sep38Poor
Oct10Good
Nov8Good
Dec9Good
Location & terrain

Where is Klamath Falls?

Klamath Falls sits at 42.2°N, 121.8°W, 4,108 ft above sea level, in United States. The nearest listed city is Altamont, 2.5 mi away.

Topography around Klamath Falls

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

Within 2 miles, the terrain around Klamath Falls has significant variations in elevation — a maximum elevation change of 896 ft around an average of 4,259 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,126 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 7,894 ft.

The land around Klamath Falls is covered by grassland (47%) and artificial surfaces (29%) within 2 miles, grassland (44%) and trees (30%) within 10 miles, and trees (58%) and grassland (35%) within 50 miles.

2 miles
896 ft
10 miles
2,126 ft
50 miles
7,894 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Altamont 2.5 mi · Ashland 47 mi · Medford 57 mi · Central Point 59 mi · Grants Pass 81 mi · Roseburg 105 mi · Redding 117 mi · Bend 129 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 Klamath Falls (42.2249°, -121.7817°, elevation 4,108 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).