Weather in Florence 🇮🇹
Monthly weather averages & travel planning
September
Avg Temp
25°C
Rain Days
9 days
Sun Hours
10 hrs
Humidity
65%
Europe › 🇮🇹 Italy › Florence
Updated: March 2026
Is September a Good Time to Visit Florence?
6/10
Good
September is a good time to visit Florence (6/10). With 10 daily sunshine hours and only 9 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 6th sunniest of the year in Florence. Culture-focused travellers and those who prefer lighter crowds will find September a practical choice, with prices running lower than peak July without sacrificing all the good weather. October offers a similar profile at lower hotel rates if dates are flexible. The main practical note: Florence'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 August:30°C avg high
Florence in September rewards travelers with average highs of 25°C and overnight lows around 15°C. Expect around 9 rainy days, so a compact umbrella is worth carrying. With 10 daily sunshine hours on average, conditions are comfortable for sightseeing at a relaxed pace.
25°C
77°F
Avg High
15°C
59°F
Avg Low
9 days
86 mm total
Rain Days
10h
per day avg
Sunshine
65%
Moderate
Humidity
Temperature in Florence in September
The 10°C day-night temperature range is typical for continental climates: a light jacket in the morning that you shed by midday and need again after sunset. Humidity averages 65%, which is comfortable for most visitors. On warmer days, lighter fabrics help with the mild stickiness in the afternoon. UV index averages 6 this month, classed as moderate. Sunscreen is a sensible precaution for extended outdoor time, particularly at midday. Winds are calm at an average 12 km/h, so wind-chill is not a factor in planning your clothing. In Fahrenheit: 77°F average high, 59°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).
Temperature Trends
High
Low
Rainfall (mm)
0-20 mm21-50 mm51-100 mm100+ mm
What to Wear in Florence in September
Morning15°CBefore the day warms up
Afternoon25°CPeak daytime temperature
Evening18°CAfter sunset cools down
Packing for Florence in September means dressing for 25°C days and 15°C evenings. A light cotton tee with a casual overshirt works well at 25°C, the overshirt doubles as a layer for air-conditioned venues. Evening temperatures settle at 15°C, a modest 10°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.
Local tip: Many of Florence'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 Florence in September
September has no major festivals or public holidays in Florence, 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 Florence in September
Based on 25°C average highs and 9 rainy days
- Light layers for morning and evening
- Breathable T-shirts and comfortable trousers
- UV-protective sunglasses
- Compact folding umbrella
- Waterproof outer layer or packable rain jacket
- Quick-dry clothing that recovers fast after a shower
- SPF 30+ sunscreen
- 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 Florence in September
- Explore outdoor markets and street food stallsMid-morning (10am-12pm)At 25°C, the temperature is ideal for extended walking without overheating
- Guided walking tour of the historic centreMorning or late afternoonComfortable temperatures allow several hours on foot without fatigue
- Visit rooftop viewpoints and observation decksGolden hour (1 hour before sunset)Warm clear evenings provide exceptional visibility for panoramic photography
- Day trip to the surrounding countryside or coastFull day (depart by 8am)September is reliably dry enough for rural day trips without weather risk
- 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 morningSeptember brings distinct seasonal changes to public green spaces worth exploring
- Try the seasonal farmer's market for local produce and street foodSaturday morning markets typically 8am-1pmSeptember seasonal produce is at peak availability, offering dishes not found at other times of year
Why is Florence warm in September?
Florence's September weather is dominated by the Azores High, a semi-permanent subtropical anticyclone that blocks Atlantic rain systems from reaching the Mediterranean. As a result, September delivers reliably sunny, dry conditions with temperatures averaging 25°C. The sea moderates extreme heat and keeps overnight lows around 15°C, making the city noticeably more comfortable than inland Mediterranean destinations. 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
Florence in September
In September, Florence experiences average highs of 25°C (77°F) and lows of 15°C (59°F). Expect around 9 rainy days and 10 hours of sunshine per day, with humidity averaging 65%. The 10°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 index averages 6, so sun protection is advisable on clear days.
Florence typically sees 9 rainy days in September, with total precipitation of around 86mm. 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 Florence typically sees 4-6 fewer rain days than September.
Pack light layers, a light jacket for evenings, comfortable walking shoes, and sunscreen for Florence in September. Daytime temperatures of 25°C are pleasant, but the evening drop to 15°C means a jacket is essential if you plan to be out after dark. With 9 rainy days, bring a compact umbrella or waterproof jacket for unexpected showers. Comfortable walking shoes are a priority given the amount of ground most visitors cover.
Yes, September is an excellent time to visit Florence. With 10 daily sunshine hours and only 9 rainy days, conditions are ideal for sightseeing and outdoor activities. Temperatures averaging 25°C during the day are comfortable for long walks and outdoor dining. This is peak travel season, so booking accommodation in advance and arriving at popular attractions early in the morning helps avoid the busiest periods.
The average high temperature in Florence in September is 25°C (77°F), and the average low is 15°C (59°F). The mean daily temperature is approximately 20°C (68°F). The day-to-night range of 10°C is moderate, meaning a single light jacket covers most situations. 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 Florence is generally July. July offers the most sunshine at 14 hours per day and only 4 rainy days. Average temperatures reach 30°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around July gives you the best chance of dry, bright weather.
September is shoulder or low season in Florence, meaning fewer tourists and generally lower prices than peak months. With 10 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 September, Florence suits a range of activities thanks to mild temperatures around 25°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 10 hours of sunshine, parks and waterfront walks are particularly enjoyable.
September ranks 6th sunniest of the year in Florence, with an average 10 daily sunshine hours. The driest months are July, August, and June. July is the hottest month (30°C avg high); January is the coolest (9°C). From here, temperatures fall 6°C into October. Compared to last month (August: 30°C high, 5 rain days), September is cooler and wetter. September sits in the middle of the annual sunshine ranking for Florence, offering a reasonable balance of good weather and manageable crowds.
Year-Round Climate
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | 9°C | 2°C | 10 | 6h | View |
| February | 11°C | 2°C | 10 | 7h | View |
| March | 14°C | 4°C | 10 | 9h | View |
| April | 18°C | 7°C | 12 | 10h | View |
| May | 22°C | 11°C | 10 | 12h | View |
| June | 27°C | 16°C | 7 | 13h | View |
| July | 30°C | 18°C | 4 | 14h | View |
| August | 30°C | 19°C | 5 | 12h | View |
| September | 25°C | 15°C | 9 | 10h | View |
| October | 19°C | 11°C | 12 | 8h | View |
| November | 14°C | 7°C | 13 | 6h | View |
| December | 10°C | 3°C | 12 | 6h | View |
January
10 rain days, 6h sun
9°2°
February
10 rain days, 7h sun
11°2°
March
10 rain days, 9h sun
14°4°
April
12 rain days, 10h sun
18°7°
May
10 rain days, 12h sun
22°11°
June
7 rain days, 13h sun
27°16°
July
4 rain days, 14h sun
30°18°
August
5 rain days, 12h sun
30°19°
September
9 rain days, 10h sun
25°15°
October
12 rain days, 8h sun
19°11°
November
13 rain days, 6h sun
14°7°
December
12 rain days, 6h sun
10°3°
Other Months in Florence
Plan Your Trip to Florence
Nearby Destinations
Cities within 500 km with comparable weather conditions
Data Sources for Florence
Climate normals represent 30-year averages (1991-2020). Individual years may vary.