Weather in Barcelona 🇪🇸
Monthly weather averages & travel planning
September
Avg Temp
24°C
Rain Days
11 days
Sun Hours
10 hrs
Humidity
65%
Europe › 🇪🇸 Spain › Barcelona
Updated: March 2026
Is September a Good Time to Visit Barcelona?
7/10
Good
September is a good time to visit Barcelona (7/10). With 10 daily sunshine hours and only 11 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 7th sunniest of the year in Barcelona. Culture-focused travellers and those who prefer lighter crowds will find September a practical choice, with prices running lower than peak June without sacrificing all the good weather. La Merce Festival takes place this month, adding cultural value for those planning around it. The main practical note: Barcelona'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:28°C avg high
Based on 30-year climate normals (1991 to 2020), September in Barcelona averages 24°C by day and 18°C overnight, a range that places it firmly in the warmer tier of the annual calendar. The month records approximately 10 sunshine hours per day and 79mm of total rainfall across 11 wet days, giving it a sunshine-to-rain ratio that is broadly workable for most itineraries.
24°C
75°F
Avg High
18°C
64°F
Avg Low
11 days
79 mm total
Rain Days
10h
per day avg
Sunshine
65%
Moderate
Humidity
Temperature in Barcelona in September
The 6°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. Wind averages 16 km/h, light enough to be refreshing on warm days but noticeable in open coastal areas or elevated viewpoints. In Fahrenheit: 75°F average high, 64°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 Barcelona in September
Morning18°CBefore the day warms up
Afternoon24°CPeak daytime temperature
Evening21°CAfter sunset cools down
Packing for Barcelona in September means dressing for 24°C days and 18°C evenings. A light cotton tee with a casual overshirt works well at 24°C, the overshirt doubles as a layer for air-conditioned venues. Evening temperatures settle at 18°C, a modest 6°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 11 potential rainy days.
Local tip: Barcelona's cobbled streets turn slippery in the rain. Waterproof walking shoes with a non-slip sole outperform fashionable footwear on wet stone, and you'll cover significantly more ground in comfort.
Events in Barcelona in September
La Merce Festival
FestivalAround September 24
Barcelona's biggest free festival. Human towers, giant puppet parades, free concerts, and fireworks across the city.
BarcelonaWhat to Pack for Barcelona in September
Based on 24°C average highs and 11 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 Barcelona in September
- Explore outdoor markets and street food stallsMid-morning (10am-12pm)At 24°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
- Attend La Merce FestivalCheck specific event datesA once-yearly event that defines this city in this month and draws visitors from around the world
- 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 Barcelona mild in September?
Barcelona'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 24°C. The sea moderates extreme heat and keeps overnight lows around 18°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
Barcelona in September
In September, Barcelona experiences average highs of 24°C (75°F) and lows of 18°C (64°F). Expect around 11 rainy days and 10 hours of sunshine per day, with humidity averaging 65%. The 6°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.
Barcelona typically sees 11 rainy days in September, with total precipitation of around 79mm. 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 Barcelona typically sees 4-6 fewer rain days than September.
Pack light layers, a light jacket for evenings, comfortable walking shoes, and sunscreen for Barcelona in September. Daytime temperatures of 24°C are pleasant, but the evening drop to 18°C means a jacket is essential if you plan to be out after dark. With 11 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 Barcelona. With 10 daily sunshine hours and only 11 rainy days, conditions are ideal for sightseeing and outdoor activities. Temperatures averaging 24°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 Barcelona in September is 24°C (75°F), and the average low is 18°C (64°F). The mean daily temperature is approximately 21°C (70°F). The day-to-night range of 6°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 Barcelona is generally June. June offers the most sunshine at 13 hours per day and only 6 rainy days. Average temperatures reach 25°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.
September is shoulder or low season in Barcelona, meaning fewer tourists and generally lower prices than peak months. With 10 sunshine hours and 11 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, Barcelona suits a range of activities thanks to mild temperatures around 24°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 7th sunniest of the year in Barcelona, with an average 10 daily sunshine hours. The driest months are July, January, and February. August is the hottest month (28°C avg high); January is the coolest (13°C). From here, temperatures fall 3°C into October. Compared to last month (August: 28°C high, 7 rain days), September is cooler and wetter. September sits in the middle of the annual sunshine ranking for Barcelona, offering a reasonable balance of good weather and manageable crowds.
Year-Round Climate
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | 13°C | 5°C | 6 | 8h | View |
| February | 13°C | 5°C | 6 | 9h | View |
| March | 16°C | 7°C | 7 | 10h | View |
| April | 17°C | 10°C | 9 | 11h | View |
| May | 21°C | 13°C | 7 | 12h | View |
| June | 25°C | 17°C | 6 | 13h | View |
| July | 27°C | 20°C | 5 | 13h | View |
| August | 28°C | 21°C | 7 | 12h | View |
| September | 24°C | 18°C | 11 | 10h | View |
| October | 21°C | 14°C | 10 | 9h | View |
| November | 16°C | 9°C | 8 | 8h | View |
| December | 13°C | 6°C | 6 | 7h | View |
January
6 rain days, 8h sun
13°5°
February
6 rain days, 9h sun
13°5°
March
7 rain days, 10h sun
16°7°
April
9 rain days, 11h sun
17°10°
May
7 rain days, 12h sun
21°13°
June
6 rain days, 13h sun
25°17°
July
5 rain days, 13h sun
27°20°
August
7 rain days, 12h sun
28°21°
September
11 rain days, 10h sun
24°18°
October
10 rain days, 9h sun
21°14°
November
8 rain days, 8h sun
16°9°
December
6 rain days, 7h sun
13°6°
Other Months in Barcelona
Plan Your Trip to Barcelona
Nearby Destinations
Cities within 500 km with comparable weather conditions
Data Sources for Barcelona
Climate normals represent 30-year averages (1991-2020). Individual years may vary.