The climate of Siena
Positioned geographically in the heart of
Italy,
Siena conveys a blend of various weather patterns. As per the Köppen climate classification, it falls under the Cfa category, identified generally as a humid subtropical climate without a dry season. The year-round weather indicates notable variations following the shift of seasons.
Throughout the year, temperature swings from a low of 1.9°C (35.4°F) in winter to a high of 30.3°C (86.5°F) in summer. Humidity fluctuates relatively less, maintaining a level from 63% in summer to 85% in winter. Rainfall pattern in Siena is sporadic and can take place in any month, with
November being the wettest month with a substantial 50mm (1.97") of precipitation. The city also experiences occasional snowfall, peaking in
February with about 20mm (0.79") accumulation.
Daylight hours peak at 15.4 hours in
June, then taper off to a minimum of 9 hours in
December. Sunshine is abundant in Siena, with up to 23.9 days in
July and
August. The wind speed varies moderately from 7.1 to 10.8 Kph, with February marked as the breeziest month.
The best time to visit Siena
For an optimal experience in
Siena, consider planning visits from late
May to early
September. During this period, temperatures average between a comfortable 20.4°C (68.7°F) to 30.3°C (86.5°F), coupled with the lowest humidity level of the year.
June offers the longest daylight of up to 15.4 hours, enhancing sightseeing opportunities. Rainfall also reaches its lowest point in
August, with approximately 14mm (0.55") over 6 days.
The worst time to visit Siena
Due to the plunge in temperatures, the cold months from
December to
February might not be an ideal time to visit
Siena. Average low temperatures hover from 1.9°C (35.4°F) to 2.2°C (36°F), and while snowfall is minimal, it is prevalent during these months. This period also sees fewer sunshine days and reduced daylight time, which might restrict sightseeing activities.
Spring weather in Siena
Spring in
Siena, stretching from
March to
May, is a season of gradual warming. Temperatures rise steadily from 13.3°C (55.9°F) to 20.4°C (68.7°F), while the number of sunshine days increases to peak at 16.4 in May. However, the onset of spring also ushers in increased rainfall with 39mm (1.54") precipitation in May.
Summer weather in Siena
Summer, running from
June to
August, is the warmest season in
Siena. Daytime temperatures soar to an average high of 30.3°C (86.5°F), while nights cool down to an inviting 16.3°C (61.3°F). It also earns the distinction of being the driest season, with August seeing only 14mm (0.55") rainfall.
Autumn weather in Siena
Autumn signals a shift towards cooler temperatures, with the thermometer reading from 24.5°C (76.1°F) to 13.6°C (56.5°F) from
September to
November. Rainfall escalates during this period, culminating in November with a high of 50mm (1.97"), the highest precipitation level of the year.
Winter weather in Siena
Respecting the regular weather patterns,
Siena's winter, occurring in
December through
February, brings a chill in the air. With average temperatures ranging from 1.9°C (35.4°F) to 4.1°C (39.4°F), and the probability of 20mm (0.79") snowfall in February, it marks the coldest months. Alongside, daylight hours shrink to 9 hours, and sunshine days reduce to as low as 14.7 in December.
Weather in January
January in
Siena,
Italy, introduces the populace to the start of the calendar year with noticeably chilly temperatures. Despite the cold weather, the winter beauty of Siena captivates many tourists with frosted landscapes and quiet streets.
Weather in January » Weather in February
Moving into
February, a notable rise in temperature and snowfall can be observed in
Siena,
Italy. The weather transitions from the bitter cold of
January, making the city a more visitors-friendly destination. During this month, snowfall averages at 20mm (0.79") covering 1.4 days, making it ideal for winter sports enthusiasts.
Weather in February »Weather in March
March brings the charm of early spring to
Siena,
Italy, warming up the city after the snow-filled
February. The climate gradually begins to intensify, transforming the wintery landscapes into a scenery filled with blossoming flowers and lush greenery.
Weather in March »
Weather in April
April in
Siena,
Italy, presents an increase in temperature and rainfall, marking the arrival of spring in full bloom. With the complete dissipation of snow, the city flourishes under the mild warmth of the spring sun. Residents and tourists revel in the extended daylight hours of 13.4 hours per day, ushering in a period of outdoor festivities and cultural events.
Weather in April » Weather in May
The month of
May in
Siena,
Italy, showcases the city in the glory of late spring with rising temperatures and extended sunshine hours. The city comes alive with blossoming flora, making it an immensely attractive period for tourists.
Weather in May »Weather in June
June heralds the onset of summer in
Siena,
Italy, manifesting as a significant increase in temperature compared to the preceding spring months. The weather conditions during this period encourage locals and visitors alike to engage in outdoor pursuits.
Weather in June »
Weather in July
July in
Siena,
Italy, typically constitutes the heart of the summer, characterized by high temperatures and reduced rainfall. Seasoned with extensive daylight hours and minimum cloud coverage, the city offers its warmest welcome to tourists.
Weather in July » Weather in August
The month of
August represents the climax of the
Siena summer,
Italy, maintaining the heat of
July but with slightly more humid conditions. The weather, swaying between balmy and hot, ushers in a festive summer spirit, making historic city exploration an absolute delight.
Weather in August »Weather in September
Entering
September,
Siena,
Italy, begins to witness the onset of autumn, characterized by occasional rainfall and a marked decrease in temperature. The weather in September boasts a delightful blend of sun and rain, creating a picturesque backdrop.
Weather in September »
Weather in October
October in
Siena,
Italy, is a symbol of autumn's full swing, characterized by cooler temperatures, vibrant landscapes, and occasional showers. The dropping temperatures create a comfortable climate, providing relief from the summer heat.
Weather in October » Weather in November
November in
Siena,
Italy, showcases the subtle transition from autumn to winter, with a marked drop in temperature compared to
October. The city experiences higher rainfall during this period, enhancing the vibrancy of the landscape.
Weather in November » Weather in December
December in
Siena,
Italy, marks the arrival of winter with cold temperatures, rare snowfall, and minimal sunshine. The city decks itself up for the holiday season, adding a unique charm to the chilly weather. With a gradual drop in temperature to a low of 3.1°C (37.6°F), winter coats become indispensable.
Weather in December » [Resources]