Siena Weather in January
In Siena, January brings low daytime temperatures around 10°C (50°F), with nights cooling to 2°C (36°F). Some rainfall is to be expected.
Rainfall in Siena in January
Based on our climate data of the past 30 years, about 13 days of rain are anticipated, with 59 mm (2.3 in) on average. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in Siena in January
Siena in January gets highs of 10°C (50°F) during the day and drops to 2°C (36°F) at night. The month of January belongs to the winter season. The days stay cool from start to finish. Layering up well will make outdoor time much more comfortable. Nights drop to 2°C (36°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet. Expect the coolest temperatures of the year during January.
Sunshine in Siena in January
The city usually sees around 120 hours of sunlight, indicating a moderately sunny period.If you're looking for dry conditions and comfortable temperatures, January may not be the ideal month to visit Siena. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Italy, check out our Siena's climate page.
Siena Temperature in January
Min Temperature
2°C (36°F)
Max Temperature
10°C (50°F)
Chance of Rain
44%
Precipitation
59 mm (2.3 in)
Rainy days
13 days
Sunshine
120 hours
Percentage Sunshine
Daily Historical Temperatures
51-year average (1976-2026)
Based on our historical records, temperatures in Siena typically stay consistent throughout January, with daily highs averaging around 10°C (50°F). Nights are cold, with lows around 3°C (37°F).
Average temperatures in January
Daily Historical Precipitation
51-year average (1976-2026)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in January
Historical weather for Siena in January
Browse day-by-day weather records for Siena spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Siena historical weather extremes in January
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Siena.
- Siena recorded its highest January temperature of 18°C (64°F) on January 18, 2024.
- On January 7, 1985, Siena saw its coldest January day with temperatures maxing out at -1°C (30°F).
Best Places in Italy in January
Find out more about the weather in Italy and which places have the best travel conditions in this month. See all of Italy in January →
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What to Wear in Siena in January
Dress warmly and in layers for your trip to Siena in January. A good base layer system works wonders. Start with good thermal underwear, add something warm like a fleece sweater, then finish with a waterproof jacket on top. Wet weather is likely, so pack waterproof gear for multiple rainy days. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Siena in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Italy, check out our Siena's climate page.
See the full Siena climate overview or explore weather in Italy.
