Santorini Weather in December

🇬🇷 Greece

15°C

High

12°C

Low

Rain Days

Sunshine

65%

Humidity

Europe › 🇬🇷 Greece › Santorini

Updated: March 2026

Is December a Good Time to Visit Santorini?

5/10

Fair

December is a fair time to visit Santorini (5/10). With 7 daily sunshine hours and only 9 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 12th sunniest of the year in Santorini. Culture-focused travellers and those who prefer lighter crowds will find December a practical choice, with prices running lower than peak June without sacrificing all the good weather. January offers a similar profile at lower hotel rates if dates are flexible. The main practical note: Santorini's popular sites are busiest between 10am and 3pm regardless of season. Arriving at opening time or after 4pm makes a significant difference to the experience. Planning tips: accommodation is generally available without long lead times, and flight prices are typically lower than peak season. Flexible travellers will find the best deals by booking 2-4 weeks ahead. Mid-week arrivals consistently unlock lower hotel rates than weekend check-ins.

vs November:18°C avg high

The single most important thing to know about visiting Santorini in December: conditions are genuinely cooperative, with 15°C highs and only 9 wet days making this one of the more straightforward months to plan around. Precipitation totals 54mm for the month, spread across roughly 9 days, and 7 sunshine hours per day give you a reliable window for outdoor plans.

15°C

Avg High

12°C

Avg Low

9 days

Rain Days

Sunshine

65%

Humidity

Temperature in Santorini in December

The narrow 3°C gap between daytime and overnight temperatures, characteristic of coastal cities with maritime moderation, means a single mid-layer works across the whole day. Humidity averages 65%, which is comfortable for most visitors. On warmer days, lighter fabrics help with the mild stickiness in the afternoon. The UV index of 2 is low, meaning sun exposure is minimal concern and sunscreen is largely optional. Average wind speeds of 35 km/h add a meaningful windchill factor, making the 15°C temperature feel cooler than it reads. In Fahrenheit: 59°F average high, 54°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).

Temperature in December

Monthly Precipitation (mm)

What to Wear in Santorini in December

Morning12°CBefore the day warms up

Afternoon15°CPeak daytime temperature

Evening15°CAfter sunset cools down

Packing for Santorini in December means dressing for 15°C days and 12°C evenings. A mid-weight jacket over a sweater handles 15°C daytime temperatures; the combination stays comfortable all day without overheating. Evening temperatures settle at 12°C, a modest 3°C drop that a light cardigan or denim jacket covers. European cobblestones reward low-profile walking shoes over flip-flops or heels, with cushioned trainers or leather walking shoes being the practical choice. A compact foldable umbrella weighs almost nothing and earns its keep across 9 potential rainy days.

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Local tip: Many of Santorini's museums and galleries maintain cool interior temperatures regardless of outdoor conditions. A compact layer in your daypack lets you move between warm streets and chilled exhibition halls without discomfort.

Events in Santorini in December

December has no major festivals or public holidays in Santorini, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.

What to Pack for Santorini in December

Based on 15°C average highs and 9 rainy days

Warm jacket (down or fleece)
Merino wool base layer (regulates temperature and resists odour)
Sweaters and lined trousers
Scarf and lightweight gloves
Compact folding umbrella
Waterproof outer layer or packable rain jacket
Quick-dry clothing that recovers fast after a shower
Comfortable walking shoes (a second pair lets the first air out overnight)
Universal travel adapter
Small day pack for city exploration
Reusable water bottle

Best Activities in Santorini in December

Explore the old town's cobblestone backstreetsMorning (9-11am)At 15°C, conditions are pleasant for unhurried exploration on foot
Visit hilltop viewpoints for panoramic city viewsLate afternoon (4-6pm)Low sun angle creates dramatic light for photography while temperatures remain comfortable
Bicycle rental for a half-day city circuitMid-morning startMild 15°C temperatures are ideal for extended cycling without excessive effort
Boat tour of the river, bay, or canal networkLate morning departureComfortable weather makes open-deck boats viable without wind-chill concerns
Afternoon in a world-class museum or galleryAfternoon (2-5pm)Pairs well with outdoor morning activities and provides a mid-day rest from sightseeing
Coffee-house or traditional cafe culture experienceMid-morning or post-lunchA cultural ritual in this region that rewards slow appreciation regardless of weather
Evening live music, theatre, or opera performanceEvening shows typically at 7-9pmConsistent evening temperatures make getting to and from evening venues comfortable
Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningDecember brings distinct seasonal changes to public green spaces worth exploring
Warm up with traditional hot dishes: local stew, fondue, or braised specialities at a neighbourhood restaurantLunch (12-2pm) or dinner (7-9pm)Cold-weather cuisine is a genuine cultural experience and the best local restaurants serve their heartiest dishes in cooler months

Why is Santorini mild in December?

In December, the Azores High weakens and retreats southward, allowing Atlantic storm tracks to cross the Mediterranean and bring the city its seasonal rainfall. Temperatures average 15°C during the day and drop to 12°C at night as cold continental air occasionally pushes in from the north. This is the rainy season that keeps the region's landscape green through spring. Climate data: Open-Meteo ERA5 (1991–2020).

Sunshine Hours

The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.

UV Index

A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate -- wear sunscreen. UV 6-7: High -- hat and SPF 30+ essential. UV 8-10: Very High -- limit midday exposure. UV 11+: Extreme -- seek shade between 10am-4pm.

Rain Days

A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.

Humidity

Relative humidity as a percentage. Below 40%: Dry -- skin and throat may feel parched. 40-60%: Comfortable -- ideal for most people. 60-80%: Sticky -- light, breathable fabrics recommended. Above 80%: Muggy -- heat feels more intense; quick-dry clothing is essential.

Frequently Asked Questions: Santorini in December

In December, Santorini experiences average highs of 15°C (59°F) and lows of 12°C (54°F). Expect around 9 rainy days and 7 hours of sunshine per day, with humidity averaging 65%. The 3°C gap between daytime and overnight temperatures is worth planning around: light layers work for most visitors during the day, but an overshirt or cardigan handles the cooler evenings. UV exposure is moderate at index 2.

Santorini typically sees 9 rainy days in December, with total precipitation of around 54mm. Rain is moderate and manageable. Showers tend to pass quickly, and a light rain layer or foldable umbrella is sufficient protection for most days. For context, the driest month in Santorini typically sees 4-6 fewer rain days than December.

Pack a warm jacket, sweaters, and layering pieces for Santorini in December. Temperatures can drop to 12°C at night, so thermal underlayers are advisable for evening outings. Waterproof footwear is important with 9 rainy days expected. A scarf, hat, and gloves handle the windchill on clear cold days, which often feel colder than the thermometer reads.

December is a reasonable time to visit Santorini. Expect 9 rainy days, so pack a light rain layer for flexibility. Average temperatures of 15°C make outdoor exploration comfortable during the dry periods. With 7 daily sunshine hours, there are reliable windows of good weather to plan outdoor activities around, even if the month is not the driest on the calendar.

The average high temperature in Santorini in December is 15°C (59°F), and the average low is 12°C (54°F). The mean daily temperature is approximately 14°C (56°F). The day-to-night range of 3°C is narrow, typical of coastal or maritime cities. These are 30-year climate normals based on the 1991 to 2020 reference period; individual years will vary, particularly in transitional months like spring and autumn.

The best month to visit Santorini is generally June. June offers the most sunshine at 13 hours per day and only 1 rainy days. Average temperatures reach 24°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around June gives you the best chance of dry, bright weather.

December is shoulder or low season in Santorini, meaning fewer tourists and generally lower prices than peak months. With 7 sunshine hours and 9 rainy days, the weather is less of a draw for mass tourism. This is an advantage for travellers who prefer a quieter, more relaxed experience with shorter queues and easier accommodation availability.

In December, Santorini suits a range of activities thanks to cool conditions around 15°C. Mix of indoor and outdoor activities works well given the moderate chance of rain. Top options include exploring historic neighbourhoods, visiting museums and galleries, local food markets, and day trips to surrounding areas. With 7 hours of sunshine, parks and waterfront walks are particularly enjoyable.

December ranks 12th sunniest of the year in Santorini, with an average 7 daily sunshine hours. The driest months are July, August, and June. August is the hottest month (27°C avg high); January is the coolest (13°C). From here, temperatures fall 2°C into January. Compared to last month (November: 18°C high, 6 rain days), December is cooler and wetter. December is one of the least sunny months, but that often means lower prices and fewer fellow tourists.

Year-Round Climate

Month	High	Low	Rain Days	Sun	Details
January	13°C	11°C	10	8h	View
February	14°C	11°C	9	9h	View
March	15°C	12°C	7	10h	View
April	17°C	14°C	4	11h	View
May	21°C	17°C	2	12h	View
June	24°C	21°C	1	13h	View
July	26°C	23°C	0	13h	View
August	27°C	24°C	0	13h	View
September	25°C	22°C	1	11h	View
October	22°C	18°C	4	10h	View
November	18°C	15°C	6	8h	View
December	15°C	12°C	9	7h	View

Other Months in Santorini

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

Plan Your Trip to Santorini

Best Time to Visit Santorini Santorini vs Athens in December Santorini vs Mykonos in December

Nearby Destinations with Similar Weather

These cities are within 500 km and experience broadly comparable weather conditions during the same calendar month, making them practical standalone alternatives or worthwhile additions to a longer regional itinerary.

Athens🇬🇷 Greece234 km away

13°C7°C low

Mykonos🇬🇷 Greece118 km away

14°C12°C low

Data Sources for Santorini

Santorini on Wikipedia Open-Meteo Climate API NOAA National Centers UK Met Office WMO GeoNames

Climate normals represent 30-year averages (1991-2020). Individual years may vary.