El Hierro: The smallest Canary island without mass tourism
Mainly nature lovers and those seeking tranquility go to El Hierro. The island is know for its beautiful mountains and you can wonder around for days here.
San Antonio Weather in September
September is one of the excellent months to visit San Antonio, with daytime temperatures of 28°C (82°F) and lows of 22°C (72°F) at night. Some rainfall is typical for this time of year.
Rainfall in San Antonio in September
You can typically expect 6 days of rain this month, averaging around 45 mm (1.8 in). Rainfall tends to arrive in short, intense showers this month. Rain days are few, but the showers can be surprisingly heavy.
Temperature in San Antonio in September
September is a good time to be in San Antonio. Days are excellent, reaching 28°C (82°F), with nights around 22°C (72°F). This kind of day-to-night contrast is typical for this time of year. With overnight lows of 22°C (72°F), evenings stay pleasantly warm.
Sunshine in San Antonio in September
Expect sunny days throughout the month, with an estimated 240 hours of sunshine. This makes it a pleasant time to visit San Antonio.
Average water temperature in September
The water temperature is 25°C (77°F), which most people find very comfortable. A good month for swimming and water sports.If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit San Antonio.
San Antonio Temperature in September
Min Temperature
22°C (72°F)
Max Temperature
28°C (82°F)
Water Temperature
25°C (77°F) *
Chance of Rain
21%
Precipitation
45 mm (1.8 in)
Rainy days
6 days
Humidity
72% *
Sunshine
240 hours *
Percentage Sunshine
63% *
* Data from: Ibiza, Spain (14 KM, 8 Miles).
San Antonio Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in San Antonio - and find the best time to visit.
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in San Antonio typically drop from around 29°C (84°F) at the start of September to approximately 26°C (79°F) by the end. Nights are warm, with lows typically ranging from 18°C (64°F) to 22°C (72°F).
Average temperatures in September
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for San Antonio in September
Browse day-by-day weather records for San Antonio spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
San Antonio historical weather extremes in September
According to our 27 years of weather records for San Antonio, the following extremes were recorded between 1998 and 2025.
- On September 5, 2016, temperatures climbed to 37°C (99°F), marking the warmest September day on record.
- On September 18, 2005, San Antonio saw its coldest September day with temperatures maxing out at 20°C (68°F).
- The lowest overnight temperature recorded in September was 13°C (55°F) (September 28, 2007).
Best Places in Spain in September
Find out more about the weather in Spain and which places have the best travel conditions in this month. See all of Spain in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in San Antonio in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Rain gear is recommended, you can expect wet weather on multiple days. With water temperatures around 25°C (77°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
What To Do in San Antonio in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
-
Swimming10/10 -
Cycling8/10 -
Walking8/10 -
Barbeque10/10 -
Camping10/10 -
Outdoor sports8/10
San Antonio 3-Day Forecast
More climate data for San Antonio
Temperature Rainfall Sunshine Humidity Water Temp
See the full San Antonio climate overview or explore weather in Spain.
Popular in September
Where to go in September - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
El Hierro: The smallest Canary island without mass tourism
Spain in October: Where Is It Warmest and Sunniest?
Discover where Spain is warmest in October, with climate comparisons for Seville, Alicante, Málaga, Tenerife, Madrid and Barcelona.
Visit national Park El Teide
This national park is truly a unique place that you should not miss. You will find landscapes that seem to come from another plane and you will feel tiny in these impressive surroundings.
Sevilla: A Blend of Tradition, Culture, and Hidden Gems
Experience Sevilla in spring with Semana Santa processions and Feria de Abril festivities, set against the city's iconic landmarks and vibrant culture.