Kos · December
Low seasonGreece · Europe
Climate Overview
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ø day, range from coolest to warmest dayØ dayrange | 15° (59°)7– (45–)18 (64) | 15° (59°)8– (46–)18 (64) | 17° (63°)12– (54–)21 (70) | 20° (68°)15– (59–)26 (79) | 25° (77°)19– (66–)30 (86) | 29° (84°)24– (75–)34 (93) | 32° (90°)28– (82–)36 (97) | 32° (90°)28– (82–)36 (97) | 29° (84°)24– (75–)34 (93) | 24° (75°)18– (64–)28 (82) | 20° (68°)14– (57–)25 (77) | 16° (61°)9– (48–)21 (70) |
Ø night, range from coldest to warmest nightØ nightrange | 9° (48°)1– (34–)15 (59) | 10° (50°)2– (36–)14 (57) | 11° (52°)2– (36–)15 (59) | 14° (57°)8– (46–)17 (63) | 17° (63°)12– (54–)20 (68) | 21° (70°)17– (63–)25 (77) | 23° (73°)20– (68–)26 (79) | 24° (75°)20– (68–)26 (79) | 21° (70°)16– (61–)24 (75) | 18° (64°)12– (54–)21 (70) | 14° (57°)6– (43–)19 (66) | 11° (52°)3– (37–)16 (61) |
☀️Sunshine | 6h UV 5 | 8h UV 6 | 9h UV 7 | 11h UV 9 | 12h UV 9 | 13h UV 10 | 13h UV 10 | 12h UV 9 | 11h UV 8 | 9h UV 6 | 7h UV 5 | 6h UV 4 |
🌊Water Temp | 18° (64°) | 17° (63°) | 17° (63°) | 18° (64°) | 20° (68°) | 23° (73°) | 24° (75°) | 26° (79°) | 25° (77°) | 24° (75°) | 22° (72°) | 20° (68°) |
🌧Rain Days | 9d89mm (3.5") | 5d68mm (2.7") | 5d61mm (2.4") | 1d7mm (0.3") | 2d23mm (0.9") | 0d2mm (0.1") | 0d0mm (0") | 0d0mm (<0.1") | 1d12mm (0.5") | 2d22mm (0.9") | 4d45mm (1.8") | 8d85mm (3.3") |
Best travel time current monthØ = average · small figures = range: coolest–warmest day / coldest–warmest nightClimate data 2005–2025 · Source: ERA5 + station data
Off-season — lowest travel prices with still acceptable climate.
December in Kos is on the cool side — with highs around 16°C (61°F) it's less suited for a beach holiday, but good for sightseeing away from the high season.
Daytime highs average 16°C (61°F), cooling to 11°C (52°F) at night (daily average: 14°C (57°F)). Peaks reach around 21°C (70°F), the coldest nights around 3°C (37°F). With 6 sunshine hours per day and 8 rain days (85 mm (3.3 in)), this is one of the cloudier months. The sea is 20°C (68°F) — refreshing and manageable for confident swimmers.
Pack warm clothing and sturdy footwear. Cool temperatures make hiking and cultural trips enjoyable — beaches are off the agenda.
Winter on a Greek island: mild at 14 to 16°C (57 to 61°F), but much of it closed. Kos Town carries on because people live here year-round — you get the Asklepieion and the Plane Tree of Hippocrates practically to yourself.
Packing list for Kos in December
- Long-sleeved shirts and light trousers
- Light jacket
- Swimwear (the water is still a little fresh)
- Sunscreen
- Sunglasses
- Light umbrella or rain poncho
- Travel first-aid kit
Frequently Asked Questions
- Is December a good time to visit Kos?
- December is not an optimal month for Kos (Score: 39/100), but it is manageable. For better conditions, consider May, June, July, August, September, and October.
- How warm is it in Kos in December?
- In December, Kos sees daily highs of 16°C (61°F). Nights cool to 11°C (52°F), with a daily average of 14°C (57°F). Peaks reach around 21°C (70°F), the coldest nights around 3°C (37°F).
- How much rain falls in Kos in December?
- In December, Kos receives an average of 85 mm (3.3 in) of rain over 8 rain days. An umbrella may occasionally be needed.
- How many sunshine hours does Kos get in December?
- Kos averages 6 sunshine hours per day in December — below the annual average.
- How warm is the water in Kos in December?
- Water temperature in Kos in December averages 20°C (68°F) — refreshing but slightly cool for sensitive swimmers.