Rethymno weather in April

In April, Rethymno sees average daytime highs of 17°C and overnight lows near 12°C, with 34 mm of rain across 6 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 19°C by the end. The sky is clear or mostly clear about 53% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 18 min at the start of April to 13 h 24 min by month's end. Set against the rest of the year, April is Rethymno's 7th-clearest and 10th-windiest month. For the whole year in context, see Rethymno's year-round climate.

Daytime high
17°
8th warmest
Overnight low
12°
5th coldest
Rainfall
34 mm
6 wet days
Daylight
12 h 54 min
5:56 AM – 6:49 PM
Cloud cover
40%
7th clearest
Wind
8 km/h
10th windiest
Solar energy
6.26 kWh/m²
Travel score
6.5
out of 10

Rethymno is city in Crete, Greece.

Density
82/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 19°C by the end.

A typical April day in Rethymno reaches about 17°C in the afternoon and slips back to 12°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 21°C. Set against its neighbours, April runs about 3°C warmer than March and about 4°C cooler than May.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11610
21610
31610
41611
51611
61611
71611
81711
91711
101711
111711
121711
131711
141712
151712
161812
171812
181812
191812
201812
211812
221812
231812
241812
251913
261913
271913
281913
291913
301913

Rethymno 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 daysSnow daysDaylight (hours)Travel score
Jan13° / 9714.10.59.93.2
Feb13° / 8712.30.610.73.3
Mar14° / 629.50.211.74.4
Apr17° / 12°346012.96.5
May22° / 15°233.7013.88.2
Jun26° / 19°61.3014.39.1
Jul27° / 22°30.6014.19.0
Aug28° / 22°30.7013.38.9
Sep26° / 20°172.8012.28.7
Oct22° / 16°486.4011.17.6
Nov18° / 13°699.6010.15.8
Dec14° / 10°10113.70.19.73.8

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 18% of April, with mostly cloudy or overcast conditions the remaining 29%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16139
26337
36337
46337
56535
66634
76733
86832
96931
106931
117030
127129
137030
147129
157129
167129
177228
187327
197327
207327
217327
227426
237426
247525
257624
267624
277723
287723
297822
307822

Chance of precipitation in April

Any precipitation

Rethymno gets around 34 mm of rain over 6 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 20% and peaks near 31% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
131
230
330
429
528
627
726
825
924
1023
1122
1221
1320
1419
1518
1618
1717
1817
1916
2016
2116
2216
2315
2415
2514
2614
2714
2813
2913
3013

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

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
23991
24991
25991
26991
27982
28982
29982
30982

Wind in April

Winds average 8 km/h in April.

Across April, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 18 min at the start of April to 13 h 24 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 6:17 AM to 5:38 AM, and sunset from 6:37 PM to 7:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:176:37
212.46:156:38
312.46:146:38
412.46:126:39
512.56:116:40
612.56:096:41
712.66:086:42
812.66:076:42
912.66:056:43
1012.76:046:44
1112.76:026:45
1212.76:016:46
1312.86:006:47
1412.85:586:47
1512.95:576:48
1612.95:566:49
1712.95:546:50
1813.05:536:51
1913.05:526:52
2013.05:506:52
2113.15:496:53
2213.15:486:54
2313.15:466:55
2413.25:456:56
2513.25:446:57
2613.25:436:57
2713.35:426:58
2813.35:406:59
2913.35:397:00
3013.45:387:01

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 6.26 kWh/m².

For context, solar energy here swings from a low near 2.22 kWh/m² to a high of 7.92 kWh/m² in June across the year — April's 6.26 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.7Bright
45.7Bright
55.8Bright
65.8Bright
75.8Bright
85.9Bright
96.0Bright
106.0Intense
116.1Intense
126.1Intense
136.2Intense
146.2Intense
156.3Intense
166.3Intense
176.3Intense
186.4Intense
196.4Intense
206.5Intense
216.5Intense
226.5Intense
236.6Intense
246.6Intense
256.7Intense
266.7Intense
276.7Intense
286.8Intense
296.8Intense
306.8Intense
Planning a trip in April

Hazard calendar for Rethymno

In seasonPeak

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

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

Rethymno sees seasonal dust haze (May), heaviest in May.

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

Is April a good time to visit Rethymno?

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

6.5
Sightseeing
7th-best month of the year
1.9
Beach & pool
7th-best month of the year

April is a reasonable time to visit Rethymno for sightseeing.

What to pack for Rethymno in April

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

In April, Rethymno sees daytime highs around 17°C and nights near 12°C. Pack sun protection. About 6 days see rain.

sun protection

Sea temperature near Rethymno 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 26°C and coldest in February near 16°C.

It's comfortable for a long swim from May 25 to Nov 24 — about 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
Jul25Warm
Aug26Warm
Sep25Warm
Oct23Refreshing
Nov21Refreshing
Dec18Cool

UV index in Rethymno in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April 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 Rethymno peaks around July 13 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 11 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highHighModerateJul 13UV 10Jan 11UV 3
UV index (midday)Level
Jan3Moderate
Feb3Moderate
Mar6High
Apr8Very high
May8Very high
Jun10Very high
Jul10Very high
Aug10Very high
Sep8Very high
Oct6High
Nov3Moderate
Dec3Moderate

Air quality in Rethymno in April

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Rethymno is worst in April — around 15 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (September, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1215 µg/m³Sep 218 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar14Moderate
Apr15Moderate
May12Good
Jun9Good
Jul9Good
Aug10Good
Sep8Good
Oct8Good
Nov11Good
Dec8Good
Location & terrain

Where is Rethymno?

Rethymno sits at 35.4°N, 24.5°E, 14 m above sea level, in Greece. The nearest listed city is Chania, 44 km away.

ChaniaHeraklionFiraOiaParosNaxosMykonosSparta

Topography around Rethymno

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

Within 3 km, the terrain around Rethymno has significant variations in elevation — a maximum elevation change of 329 m around an average of 64 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 842 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,432 m.

The land around Rethymno is covered by water (44%) and trees (29%) within 3 km, water (47%), trees (25%) and grassland (21%) within 16 km, and water (66%) within 80 km.

3 km
329 m
16 km
842 m
80 km
2,432 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: Chania 44 km · Heraklion 60 km · Fira 145 km · Oia 146 km · Paros 200 km · Naxos 209 km · Mykonos 243 km · Sparta 265 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 Rethymno (35.3655°, 24.4823°, elevation 14 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. 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).