Kos weather in April

In April, Kos sees average daytime highs of 17°C and overnight lows near 15°C, with 39 mm of rain across 5.8 wet days and about 12.9 hours of daylight. It is the 8th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 16°C in the first days to 18°C by the end. The sky is clear or mostly clear about 60% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 24 min at the start of April to 13 h 30 min by month's end. Set against the rest of the year, April is Kos's 7th-clearest and 9th-windiest month. For the whole year in context, see Kos's year-round climate.

Daytime high
17°
8th warmest
Overnight low
15°
5th coldest
Rainfall
39 mm
5.8 wet days
Daylight
12 h 54 min
5:43 AM – 6:39 PM
Cloud cover
34%
7th clearest
Wind
22 km/h
9th windiest
Solar energy
6.2 kWh/m²
Travel score
6.3
out of 10

Kos is city on the homonymous island in Aegean Sea, Greece.

Density
286/km²
people per km²

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

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 16°C in the first days to 18°C by the end.

A typical April day in Kos reaches about 17°C in the afternoon and slips back to 15°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 18°C. Set against its neighbours, April runs about 2°C warmer than March and about 3°C cooler than May.

10°13°15°18°20°151015202530
Avg high (°C)Avg low (°C)
11614
21614
31614
41614
51614
61614
71614
81614
91614
101615
111615
121715
131715
141715
151715
161715
171715
181715
191715
201715
211715
221716
231716
241816
251816
261816
271816
281816
291816
301817

Kos weather by month

How April compares with the rest of the year at a glance. April is the 8th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan14° / 12°17312.39.84.1
Feb14° / 12°12611.510.64.0
Mar15° / 13°788.311.75.0
Apr17° / 15°395.812.96.3
May20° / 18°163.113.98.0
Jun24° / 22°20.414.59.5
Jul26° / 24°00.114.39.6
Aug26° / 24°0013.49.4
Sep24° / 23°161.812.39.3
Oct22° / 20°624.9118.0
Nov19° / 17°1208.9106.5
Dec16° / 14°19012.89.54.7

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 60% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 16% of April, with mostly cloudy or overcast conditions the remaining 23%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17228
27327
37327
47327
57426
67525
77525
87624
97624
107624
117723
127723
137624
147723
157723
167723
177723
187723
197723
207723
217723
227822
237822
247822
257921
267921
277921
287921
298020
308020

Chance of precipitation in April

Any precipitation

Kos gets around 39 mm of rain over 5.8 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 19% and peaks near 27% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
127
227
327
426
526
626
725
825
924
1024
1124
1223
1322
1422
1521
1620
1719
1818
1917
2016
2115
2215
2314
2413
2512
2612
2711
2811
2910
3010

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the dry band about 61% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1792100
2782200
3772300
4762400
5752500
6742600
7722710
8712810
9702910
10693010
11683110
12663220
13653320
14643420
15643420
16633520
17613630
18603730
19593740
20583840
21563950
22563950
23544060
24524170
25494290
264743100
274444110
284245130
293946141
303747161

Wind in April

Winds average 22 km/h in April.

Across April, daily wind ranges from about 21 km/h on the calmest days to 24 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202530
Wind speed (km/h)Feels
124breezy
224breezy
324breezy
423breezy
523breezy
623breezy
723breezy
823breezy
923breezy
1023breezy
1123breezy
1223breezy
1323breezy
1423breezy
1523breezy
1623breezy
1723breezy
1823breezy
1923breezy
2023breezy
2122breezy
2222breezy
2322breezy
2422breezy
2522breezy
2621breezy
2721breezy
2821breezy
2921breezy
3021breezy

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 24 min at the start of April to 13 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over April. Sunrise moves from 6:05 AM to 5:24 AM, and sunset from 6:26 PM to 6:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:056:26
212.46:036:27
312.46:026:28
412.56:006:29
512.55:596:30
612.65:576:31
712.65:566:31
812.65:546:32
912.75:536:33
1012.75:516:34
1112.75:506:35
1212.85:486:36
1312.85:476:37
1412.95:466:38
1512.95:446:38
1612.95:436:39
1713.05:416:40
1813.05:406:41
1913.15:396:42
2013.15:376:43
2113.15:366:44
2213.25:356:45
2313.25:336:46
2413.25:326:47
2513.35:316:47
2613.35:296:48
2713.45:286:49
2813.45:276:50
2913.45:266:51
3013.55:246:52

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 6.2 kWh/m².

For context, solar energy here swings from a low near 2.2 kWh/m² to a high of 7.91 kWh/m² in June across the year — April's 6.2 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.6Bright
35.6Bright
45.7Bright
55.7Bright
65.8Bright
75.8Bright
85.8Bright
95.9Bright
105.9Bright
116.0Bright
126.0Intense
136.1Intense
146.1Intense
156.2Intense
166.2Intense
176.3Intense
186.3Intense
196.3Intense
206.4Intense
216.4Intense
226.5Intense
236.5Intense
246.5Intense
256.6Intense
266.6Intense
276.7Intense
286.7Intense
296.7Intense
306.8Intense
Planning a trip in April

Hazard calendar for Kos

In seasonPeak

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

Kos's rainy season runs November–February, when most of the year's rain falls.

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

Is April a good time to visit Kos?

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

6.3
Sightseeing
8th-best month of the year
1.4
Beach & pool
8th-best month of the year

April is a reasonable time to visit Kos for sightseeing.

What to pack for Kos in April

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

In April, Kos sees daytime highs around 17°C and nights near 15°C. Pack sun protection. Worth having: a warm layer and a windbreaker. About 6 days see rain.

sun protectiona warm layera windbreaker

Sea temperature near Kos in April

The nearest coast averages about 17°C in April — 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 25°C and coldest in March near 17°C.

It's comfortable for a long swim from May 23 to Nov 28 — about 6.2 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan17Cool
Feb17Cool
Mar17Cool
Apr17Cool
May19Cool
Jun22Refreshing
Jul24Refreshing
Aug25Warm
Sep24Warm
Oct23Refreshing
Nov21Refreshing
Dec19Cool

UV index in Kos in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Kos peaks around June 22 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 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 highModerateJun 22UV 9Jan 10UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar4Moderate
Apr8Very high
May8Very high
Jun10Very high
Jul9Very high
Aug9Very high
Sep8Very high
Oct5Moderate
Nov3Moderate
Dec2Moderate
Location & terrain

Where is Kos?

Kos sits at 36.9°N, 27.3°E, 10 m above sea level, in Greece. The nearest listed city is Turgutreis, 14 km away.

DidimMilasMarmarisYatağanSökeRhodes

Topography around Kos

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

Within 3 km, the terrain around Kos has only modest variations in elevation — a maximum elevation change of 196 m around an average of 22 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 830 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,389 m.

The land around Kos is covered by water (37%) and grassland (23%) within 3 km, water (74%) within 16 km, and water (74%) within 80 km.

3 km
196 m
16 km
830 m
80 km
1,389 m
treesshrubsgrasslandcroplandartificial surfaceswater
April weather nearby: Turgutreis 14 km · Bodrum 20 km · Didim 55 km · Milas 64 km · Marmaris 88 km · Yatağan 91 km · Söke 96 km · Rhodes 98 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 Kos (36.8929°, 27.2877°, elevation 10 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).