Kos weather by month & the best time to visit
🇬🇷 Greece · beach resort · Mediterranean climate
The best time to visit Kos is July — its sunniest month (Sunshine Score 98/100), with August and June close behind. Kos averages about 3,218 hours of sunshine a year. Daytime highs around 26°C / 79°F and roughly 1 mm of rain in July.
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- Sun hours / year
- 3,218
- Sunniest month
- July
- Peak score
- 98/100
- Rain / year
- 632 mm
- Midday UV at peak
- 10 (very high)
- Sea at warmest
- 26°C / 79°F
- Population
- 19k
- Elevation
- 120 m
When is the best time to visit Kos?
For sunshine, the best time to visit Kos is July, then August and June. The dullest month is January (37/100, 134 mm of rain). The full month-by-month picture is in the table below.
How sunny is Kos?
Kos is one of the sunniest places on Earth: about 3,218 hours of sunshine a year. 61 Sunshine Score points separate July (98) from January (37), so the month you pick matters. Kos is the sunniest of the 40 destinations tracked in Greece. Rain has a clear season: the wettest stretch, around January, carries about 57% of the annual 632 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 37 | 14° / 57°F | 12° / 54°F | 134 mm | 2 | 19° / 66°F |
| February | 40 | 14° / 57°F | 12° / 54°F | 99 mm | 3 | 18° / 64°F |
| March | 51 | 15° / 59°F | 13° / 55°F | 58 mm | 5 | 18° / 64°F |
| April | 69 | 17° / 63°F | 15° / 59°F | 37 mm | 6 | 18° / 64°F |
| May | 94 | 20° / 68°F | 18° / 64°F | 21 mm | 8 | 20° / 68°F |
| June | 97 | 24° / 75°F | 21° / 70°F | 5 mm | 9 | 23° / 73°F |
| July | 98 | 26° / 79°F | 23° / 73°F | 1 mm | 10 | 25° / 77°F |
| August | 98 | 27° / 81°F | 24° / 75°F | 1 mm | 9 | 26° / 79°F |
| September | 95 | 25° / 77°F | 22° / 72°F | 18 mm | 7 | 26° / 79°F |
| October | 90 | 22° / 72°F | 19° / 66°F | 43 mm | 5 | 25° / 77°F |
| November | 68 | 18° / 64°F | 16° / 61°F | 88 mm | 3 | 23° / 73°F |
| December | 44 | 15° / 59°F | 13° / 55°F | 127 mm | 2 | 21° / 70°F |
Sea temperature in Kos by month
The sea off Kos is warmest in August at around 26°C / 79°F, and coolest in February at 18°C / 64°F. The water sits at a comfortable 21°C or warmer roughly 7 months a year. Month-by-month sea-surface temperatures are in the Sea column of the table above.
See Kos on the interactive sunshine globe →
Nearby places for sunshine
- Bodrum Türkiye · 72 km · best in Jul · 3,195 h sun/yr
- Rhodes Greece · 99 km · best in Jul · 3,201 h sun/yr
- Samos Greece · 101 km · best in Jul · 3,081 h sun/yr
- Santorini Greece · 150 km · best in Jun · 3,012 h sun/yr
- Dalaman Türkiye · 152 km · best in Jun · 3,202 h sun/yr
- Karpathos Greece · 153 km · best in Jul · 3,177 h sun/yr
Nearest destinations
- Kalymnos Greece · 23 km · 3,101 h sun/yr · best in Jun
- Leros Greece · 51 km · 3,080 h sun/yr · best in Jul
- Astypalaia Greece · 68 km · 3,100 h sun/yr · best in Jun
Head-to-head
How Kos compares month by month: Kos vs Rhodes · Kos vs Bodrum · Kos vs Samos · Kos vs Karpathos · all comparisons
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