Best Time to Visit Kos: Weather Month by Month

Q: What is the best time to visit Kos?

June is the best month with 27.0°C highs, 22.0°C lows, 10.0h of sunshine and 4.0% rainy days. The months of June & September offer comparable conditions.

Q: How many hours of sunshine does Kos get in June?

Kos averages 10.0 sunshine hours per day in June. It is the sunniest month with a climate score of 9.2/10.

Q: What is the rainiest month in Kos?

January is the most unfavourable month with January has the lowest climate score of the year and the lowest climate score of the year.

Q: What are the temperatures at night in Kos in June?

In June, overnight lows reach 22.0°C, while afternoon highs average 27.0°C.

Q: Is Kos good in winter?

In winter (December-February), Kos scores 5.2/10 on average — Difficult period — prefer the peak season.. The best month overall remains June with a score of 9.2/10.

Q: When should you avoid Kos?

January is the most difficult month to visit Kos, with January has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.

Decide

When to visit Kos?

The decision rests on several criteria. Climate score, tourist crowds and feasible activities.

Verdict: In Kos, June and September clearly stand out. January concentrates the least favourable conditions.

Top & avoid

🏆 June · 9.4 September · 9.2 May · 8.5 October · 8.4 ⚠️ January · 4.4

4.4

Jan

7.2

Feb

7.5

Mar

7.8

Apr

8.5

May

9.4

Jun

6.6

Jul

6.5

Aug

9.2

Sep

8.4

Oct

7.7

Nov

4.5

Dec

Best period · ≥ 7 Decent period · 4 – 7 Tough conditions · < 4

What you grasp in 5 seconds

Kos offers 8 comfortable months, without any month really to avoid. The gap stays moderate: 9.4 in June vs 4.4 in January.

What to check next

Your tolerance for crowds and budget. The best months concentrate tourist saturation and higher prices. Shoulder seasons offer a good compromise.

Next action

Scroll down to the detailed table to compare month by month, then open the page of the month that interests you.

Compare the 12 months By your project

How we calculate the score

The score combines 4 weighted criteria using 10 years of real climate data (ERA5).

Source : ERA5 · Open-Meteo · 10 years (2016–2025) · Full methodology →

Understand

Compare all 12 months

Month-by-month details: temperature, rain, sunshine, score and verdict.

✅ 8 comfortable months (Feb · Mar · Apr · May · Jun · Sep · Oct · Nov)

Month	T° min	T° max	Rain %	mm/day	Sun	Score	Verdict
🌥️ January →	11°C	15°C	29%	3.7mm	5.3h	4.4/10	Decent period
⛅ February →	12°C	16°C	22%	2.5mm	6.2h	7.2/10	Best period
☀️ March →	13°C	17°C	16%	1.7mm	7.2h	7.5/10	Best period
☀️ April →	15°C	19°C	12%	1.0mm	8.2h	7.8/10	Best period
☀️ May →	18°C	22°C	8%	0.5mm	9.2h	8.5/10	Best period
☀️ June →	22°C	27°C	4%	0.3mm	10.0h	9.4/10	Best period
⛅ July →	24°C	30°C	1%	0.0mm	10.0h	6.6/10	Decent period
⛅ August →	25°C	30°C	1%	0.0mm	9.4h	6.5/10	Decent period
☀️ September →	23°C	27°C	4%	0.2mm	8.5h	9.2/10	Best period
☀️ October →	19°C	23°C	9%	0.7mm	7.1h	8.4/10	Best period
☀️ November →	16°C	20°C	21%	2.7mm	6.2h	7.7/10	Best period
🌥️ December →	13°C	17°C	27%	3.7mm	5.4h	4.5/10	Decent period

Rain %29%

Decent period

Rain %22%

Best period

Rain %16%

Best period

Rain %12%

Best period

Best period

Best period

Decent period

Decent period

Best period

Best period

Rain %21%

Best period

Rain %27%

Decent period

📊 Quick read

Optimal window

Feb → Jun

Good transition

Jan · Jul · Aug · Dec

Tough period

none

🌡️ Detailed conditions (June)

🌡️ Feel

Warm

☀️ UV

8.0 · Very strong

💧 Humidity feel

18°C · Humid

☔ Rain

4% · 0.3 mm/day

🌅 Sunshine

10.0h/day

Week by week

Kos week by week: your odds of avoiding rain

For each week of the year: in how many years out of 10 it was mostly dry (at most 2 rainy days), 2016 to 2025.

Safest week: Jul 2 to Jul 8, mostly dry in 10 years out of 10 (0.0 rainy day(s) on average).

Most exposed: Dec 3 to Dec 9, mostly dry in 5 years out of 10 (2.5 rainy days on average).

Number = years out of 10 with at most 2 rainy days in the week. Source: ERA5 reanalysis (ECMWF) via Open-Meteo, daily data 2016-2025. Rainy day = at least 1 mm, as everywhere on the site.
Jan	Jan 16/1016°C	Jan 85/1015°C	Jan 156/1015°C	Jan 228/1013°C	Jan 298/1015°C
Feb	Feb 57/1014°C	Feb 127/1015°C	Feb 197/1015°C	Feb 269/1016°C
Mar	Mar 57/1016°C	Mar 129/1016°C	Mar 1910/1016°C	Mar 268/1018°C
Apr	Apr 27/1018°C	Apr 98/1019°C	Apr 169/1020°C	Apr 2310/1020°C	Apr 3010/1021°C
May	May 710/1022°C	May 1410/1024°C	May 2110/1024°C	May 289/1024°C
Jun	Jun 410/1026°C	Jun 1110/1027°C	Jun 1810/1028°C	Jun 2510/1029°C
Jul	Jul 210/1030°C	Jul 910/1030°C	Jul 1610/1030°C	Jul 2310/1030°C	Jul 3010/1030°C
Aug	Aug 610/1030°C	Aug 1310/1029°C	Aug 2010/1029°C	Aug 2710/1029°C
Sep	Sep 310/1028°C	Sep 1010/1028°C	Sep 1710/1027°C	Sep 249/1026°C
Oct	Oct 110/1025°C	Oct 810/1024°C	Oct 159/1023°C	Oct 229/1023°C	Oct 299/1022°C
Nov	Nov 510/1022°C	Nov 128/1020°C	Nov 196/1019°C	Nov 266/1018°C
Dec	Dec 35/1017°C	Dec 106/1017°C	Dec 179/1016°C	Dec 247/1015°C

A specific date? The app computes the same figure day by day.

10-year trend

Annual temperatures — Kos

Min/max temperature curves observed over the past 10 years (ERA5). Shows climate stability and trend.

Tailor

For your trip

A few angles depending on what kind of trip you are planning.

🏖️ Beaches: Jun-Sept🌊 Swell: Sept-Mar🚤 Water activities

Book

Plan your trip

Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.

🏨

Stay

Hotels & rentals · Kos

Expedia →

🎟️

Activities

Tours, tickets, experiences

See ↓

✈️

Flights

Multi-airline comparator

Kiwi →

🎟️ Activities & tours · Kos

GetYourGuide selection · free cancellation

See all →

Affiliate link · GetYourGuide

Practical info

What you need to know before you go

Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a beach holiday.

Country · Greece

🗣️LanguageGreek

💶CurrencyEuro (€)

🚗DrivingRight-hand

🛡️Safety ⓘVery safe · 1/5

💰Cost of living ⓘModerate · 3/5

🌡️ Climate

🌍Climate typeTemperate oceanic

📈Climate trend ⓘStable

🔥Hottest monthJuly · 30°C

❄️Coolest monthJanuary · 15°C

🌧️Rainiest month ⓘJanuary · 29%

🏖️ Beach holiday

📅Peak seasonJuin → Sept

🏖️Swell (Sept–Mar) ⓘModérée

🛂VisaSchengen · 90 days

Explore

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World ranking 2026See →

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Winter sunSee →

Where to go in JulySee →

🗺️ Climate map of 754 destinations

Location

Where is Kos ?

Global position + regional geographic context.

🌍 World

🔍 Geographic context

Temperate oceanic climate with a 9.4 → 4.4 gap between best and worst month. 10 years of ERA5 data to choose by project.

36.89°N · 27.09°E

Questions

Frequently asked questions

What is the best time to visit Kos?

June is the best month with 27.0°C highs, 22.0°C lows, 10.0h of sunshine and 4.0% rainy days. The months of June & September offer comparable conditions.

How many hours of sunshine does Kos get in June?

Kos averages 10.0 sunshine hours per day in June. It is the sunniest month with a climate score of 9.2/10.

What is the rainiest month in Kos?

January is the most unfavourable month with January has the lowest climate score of the year and the lowest climate score of the year.

What are the temperatures at night in Kos in June?

In June, overnight lows reach 22.0°C, while afternoon highs average 27.0°C.

Is Kos good in winter?

In winter (December-February), Kos scores 5.2/10 on average — Difficult period — prefer the peak season.. The best month overall remains June with a score of 9.2/10.

When should you avoid Kos?

January is the most difficult month to visit Kos, with January has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.