Oia weather in May

In May, Oia sees average daytime highs of 20°C and overnight lows near 18°C, with 8 mm of rain across 1.6 wet days and about 13.9 hours of daylight. It is the 6th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 18°C in the first days to 21°C by the end. The sky is clear or mostly clear about 75% of the time in May, and the air most often feels humid.

Daylight stretches from about 13 h 30 min at the start of May to 14 h 18 min by month's end. Set against the rest of the year, May is Oia's 5th-clearest and 12th-windiest month. For the whole year in context, see Oia's year-round climate.

Daytime high
20°
6th warmest
Overnight low
18°
7th coldest
Rainfall
8 mm
1.6 wet days
Daylight
13 h 54 min
5:17 AM – 7:13 PM
Cloud cover
24%
5th clearest
Wind
21 km/h
12th windiest
Solar energy
7.22 kWh/m²
Travel score
8.1
out of 10

Oia is village in Thira, Greece.

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 18°C in the first days to 21°C by the end.

A typical May day in Oia reaches about 20°C in the afternoon and slips back to 18°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 21°C. Set against its neighbours, May runs about 3°C warmer than April and about 3°C cooler than June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11817
21817
31817
41817
51817
61917
71917
81917
91918
101918
111918
121918
131918
141918
152018
162018
172018
182019
192019
202019
212019
222019
232019
242019
252119
262119
272119
282120
292120
302120
312120

Oia weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan14° / 13°6911.39.84.2
Feb14° / 13°589.310.64.3
Mar15° / 13°396.411.75.2
Apr17° / 15°153.112.96.6
May20° / 18°81.613.98.1
Jun23° / 22°10.314.49.5
Jul25° / 24°0014.29.7
Aug25° / 24°00.113.49.6
Sep24° / 23°51.112.29.4
Oct21° / 20°253.911.18.0
Nov18° / 17°366.210.16.7
Dec16° / 14°589.69.65.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 75% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 12% of May, with mostly cloudy or overcast conditions the remaining 14%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18416
28416
38416
48515
58515
68515
78614
88614
98614
108614
118614
128614
138614
148515
158515
168515
178515
188515
198515
208515
218614
228614
238713
248713
258713
268812
278812
289010
299010
30919
31928

Chance of precipitation in May

Any precipitation

Oia gets around 8 mm of rain over 1.6 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 5% and peaks near 6% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
16
26
36
45
55
65
75
85
95
104
114
124
134
144
154
164
174
184
194
204
215
225
235
245
255
265
275
285
294
304
314

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the humid band about 43% of days. Sticky, muggy-or-worse air turns up on roughly 5% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13353140
23153160
32854180
42655190
52455210
62255230
72154250
81953271
91852291
101751311
111551331
121448362
131347382
141245403
151044433
16942454
17840484
18738505
19736525
20633556
21631576
22529597
23527608
24425629
254236310
264226311
273206413
283196414
293176416
303166318
313156220

Wind in May

Winds average 21 km/h in May, the calmest month.

Across May, daily wind ranges from about 20 km/h on the calmest days to 22 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
122breezy
222breezy
322breezy
422breezy
522breezy
622breezy
722breezy
822breezy
922breezy
1021breezy
1121breezy
1221breezy
1321breezy
1421breezy
1521breezy
1621breezy
1721breezy
1820breezy
1920breezy
2020breezy
2120breezy
2220breezy
2320breezy
2420breezy
2520breezy
2620breezy
2720breezy
2821breezy
2921breezy
3021breezy
3121breezy

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 30 min at the start of May to 14 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over May. Sunrise moves from 5:32 AM to 5:07 AM, and sunset from 7:00 PM to 7:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:327:00
213.55:307:01
313.55:297:02
413.65:287:02
513.65:277:03
613.65:267:04
713.75:257:05
813.75:247:06
913.75:237:07
1013.85:227:08
1113.85:217:09
1213.85:207:09
1313.85:197:10
1413.95:187:11
1513.95:187:12
1613.95:177:13
1714.05:167:14
1814.05:157:14
1914.05:147:15
2014.05:147:16
2114.15:137:17
2214.15:127:18
2314.15:127:18
2414.15:117:19
2514.25:107:20
2614.25:107:21
2714.25:097:21
2814.25:097:22
2914.25:087:23
3014.35:087:24
3114.35:077:24

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 7.22 kWh/m².

For context, solar energy here swings from a low near 2.21 kWh/m² to a high of 7.91 kWh/m² in June across the year — May's 7.22 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
16.9Intense
26.9Intense
36.9Intense
47.0Intense
57.0Intense
67.0Intense
77.0Intense
87.0Intense
97.1Intense
107.1Intense
117.1Intense
127.1Intense
137.2Intense
147.2Intense
157.2Intense
167.2Intense
177.3Intense
187.3Intense
197.3Intense
207.3Intense
217.3Intense
227.4Intense
237.4Intense
247.4Intense
257.4Intense
267.5Intense
277.5Intense
287.5Intense
297.5Intense
307.6Intense
317.6Intense
Planning a trip in May

Is May a good time to visit Oia?

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

8.1
Sightseeing
5th-best month of the year
3.9
Beach & pool
6th-best month of the year

May is one of the better times to visit Oia for general sightseeing.

What to pack for Oia in May

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

In May, Oia sees daytime highs around 20°C and nights near 18°C. Pack sun protection. Worth having: a windbreaker.

sun protectiona windbreaker

Sea temperature near Oia in May

The nearest coast averages about 19°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 24°C and coldest in February near 16°C.

It's comfortable for a long swim from May 28 to Nov 12 — about 5.6 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb16Cool
Mar16Cool
Apr17Cool
May19Cool
Jun22Refreshing
Jul24Refreshing
Aug24Warm
Sep24Refreshing
Oct22Refreshing
Nov20Cool
Dec18Cool

UV index in Oia in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Oia peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 11 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highHighModerateJul 15UV 9Jan 11UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5Moderate
Apr8Very high
May7Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Moderate
Location & terrain

Where is Oia?

Oia sits at 36.5°N, 25.4°E, 0 m above sea level, in Greece. The nearest listed city is Fira, 7.0 km away.

NaxosParosMykonosHeraklionRethymnoChaniaKos

Topography around Oia

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Oia.

Within 3 km, the terrain around Oia has significant variations in elevation — a maximum elevation change of 322 m around an average of 22 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 548 m; within 80 km, large variations in elevation — a maximum elevation change of 971 m.

The land around Oia is covered by water (72%) and grassland (21%) within 3 km, water (89%) within 16 km, and water (93%) within 80 km.

3 km
322 m
16 km
548 m
80 km
971 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Fira 7.0 km · Naxos 71 km · Paros 72 km · Mykonos 109 km · Heraklion 128 km · Rethymno 146 km · Chania 161 km · Kos 177 km

Greece travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 60% of US
price level, 2025
GDP per capita
$26,948
2025
Happiness
5.7 / 10
World Happiness, 2025
Safe drinking water
97%
of population, 2024
Homicide rate
0.8
per 100k, 2023
Road deaths
8.3
per 100k/yr, 2019
Income group
High
World Bank
English
High
EF EPI 592
Religion
other 3%Muslim 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 Oia (36.4626°, 25.3764°, elevation 0 m), 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).