30YearWeather
Siena
When to avoid visiting Siena, Italy
Seasonal Comparison

Least Favorable Months in Siena

Based on 30 years of NASA satellite data, Siena enjoys relatively good weather year-round. However, if you're comparing months, January, November, December are the least favorable — though still perfectly visitable.

January63/100November63/100December63/100

Good news: Siena has no truly bad months!

With a score of 63/100, even January(the "worst" month) is still a reasonable time to visit. These months are simply the least favorable compared to other months in Siena, not objectively bad. Many travelers enjoy visiting during these periods and benefit from lower prices and fewer crowds.

Why January is the Least Favorable (But Still Okay) Time to Visit Siena

Is January a Good Time to Visit Siena?

👌A reasonable choice for your trip
Short Answer

Cold but characterful January in Siena: 9°C daytime temperatures, fewer crowds, and January-specific atmosphere. Not for sun-seekers, but ideal for cozy indoor experiences.

Decision Factors

Vaccinations required

Yellow Fever

Very high humidity

82% average humidity

Health precautions needed

Be aware of: Leptospirosis, Leishmaniasis, Hantavirus

Shoulder season - balanced conditions

52% of peak - good value with moderate crowds

Rich cultural heritage

4 UNESCO World Heritage sites nearby

Exceptional dining scene

23 Michelin-listed restaurants

Good For

  • 🏛️
    Cultural tourists

    Comfortable conditions for exploring museums and sites

  • 💼
    Business travelers

    Climate-controlled meetings unaffected by weather

Who Should Avoid

  • 👴
    Elderly travelers

    82% humidity creates difficult conditions

930 observations30-year historical data
Confidence: 95%

Key Challenges During These Months

Challenging Conditions

Weather conditions may limit outdoor activities and sightseeing options

Months to Avoid: Detailed Breakdown

Worst63

January

Very high humidity

View details
2nd Worst63

November

Very high humidity

View details
3rd Worst63

December

Very high humidity

View details

Looking for the Best Time Instead?

Discover the optimal months to visit Siena with ideal weather conditions, fewer crowds, and better prices.

Best Time to Visit Siena

Frequently Asked Questions

When should I avoid visiting Siena?

Based on 30 years of data, the most challenging months are January, November, December. Primary concerns include: very high humidity.

What is the worst month to visit Siena?

January is typically the most challenging month, scoring only 63/100 in our travel conditions analysis.

Can I still visit during these months?

Yes, many travelers still visit during challenging months. Come prepared with appropriate gear, flexible bookings, and backup plans. Lower prices and fewer tourists can offset the weather challenges.

Are hotels cheaper during these months?

Often yes. Low season typically means reduced hotel rates, easier reservations, and fewer crowds at popular attractions. Some travelers prefer this trade-off.