Your September weather guide
WarmWeather in La Palma in September
September is a good choice for La Palma if you want warm days, comfortable sea swimming and little rain, rather than intense heat. Average highs of 23.7°C and night lows of 20.9°C mean light clothes should cover much of your stay, including evenings. The sea averages 24.1°C, so swimming is a clear reason to go. The main catch is humidity: the warmth may feel sticky even when the temperature looks modest.
Long-term climate averages for Los Llanos de Aridane, not a forecast · 1991-2020
La Palma, month by month
Your snapshot
At a glance
The useful details for Los Llanos de Aridane.
- Average daytime high
- 23.7°C
- 9 in 10 days stay below 25°C
- Average night-time low
- 20.9°C
- coldest 10% of nights: 19°C or lower
- Compared with London
- +5.1°C
- London averages 18.6°C in September
- Sea temperature
- 24.1°C
- year to year: 23°C to 25°C
- Sunshine per day (est.)
- 8.8h
- 72% of 12.2 h of daylight
- Rainy days (1 mm+)
- 1
- 4 mm over the month
- Humidity
- 76%
- Days over 25°C
- 13%
- 1% over 30°C
- Record high 1991-2020
- 35.8°C
- 2020-09-08
- Record low 1991-2020
- 16.1°C
- 2019-09-18
- Flight from London
- ≈ 4 h 24 min
- 2906 km, short-haul (estimate for a direct flight)
Records are observed extremes within 1991-2020, not typical holiday conditions. Warm-day percentages are shares of days, not day counts.
How September compares
September is the 2nd warmest month of the year in La Palma and ranks 117th of 134 destinations we compare for September - see where else is hot in September. Within Spain it is 84th of 87 (Spain in September). Against London's average high of 18.6°C in September, La Palma is 5.1°C warmer by day and 9.7°C warmer at night.
Daytime and night-time in September
The typical September day in La Palma peaks at 23.7°C, but that is an average: the warmest 10% of days reach 25.2°C or more. Roughly 1 in 8 days top 25°C and 1 in 111 pass 30°C. Nights average 20.9°C; one night in ten drops to 19.3°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest September day here reached 35.8°C (2020-09-08) and the coldest night 16.1°C (2019-09-18).
Rain in September
Dry (3 rainy days or fewer): about 1 days with 1 mm or more, 4 mm in total. Year to year it varies a lot - the wettest September was 2010 with 44 mm, the driest 1992 with 0 mm. Humidity averages 76%.
Sea temperature in September
The sea averages 24.1°C - warm enough to swim (22°c+). Depending on the year it ranges from 23.3°C to 24.7°C. This is the warmest the sea gets here all year.
Sunshine and daylight
Around 8.8 hours of sunshine a day (estimated from cloud cover), 12.2 hours of daylight: the sun rises about 07:57 and sets about 20:17 local time in mid-September. Average cloud cover is 27%.
Is September a good time to visit La Palma?
Yes - it is one of the better months: warm days, little rain and long sunny days. The best months for La Palma on our scoring are August, September, July.
Warmer than London, without reliably hot afternoons
La Palma is noticeably warmer than London in September, with average daytime highs 5.1°C higher. It is also among the island's warmest months, so this is not a cool-season compromise. Even so, expect warmth rather than dependable baking heat. That suits travellers who want to spend time outdoors without planning everything around very hot afternoons. Humidity averages 76%, which can make the air feel close; loose, breathable clothing is a sensible choice. Evenings stay mild on average, so heavy layers are unlikely to be your priority. Pack a light extra layer for cooler spells, and keep sun protection handy even when the air feels comfortable.
Good swimming weather, with little rain to plan around
The sea is warm enough for swimming, making September a good fit if time in the water matters more than high air temperatures. Sunshine averages about 8.8 hours a day out of 12.2 hours of daylight, leaving plenty of scope for outdoor plans without suggesting every hour will be cloudless. Rain is usually a minor concern, with about 1 rainy day during the month. You are unlikely to need a holiday built around wet-weather alternatives, though dry averages are not a guarantee. For packing, favour swimwear, light daytime clothes and sun protection over bulky rain gear. Take shade breaks around midday rather than judging sun exposure by temperature alone.
A little perspective
La Palma through the year
September is highlighted. See how it compares with the rest of the year.
| Month | Day | Night | Sea | Sun/day | Rain mm | Rainy days | Days 25°C+ |
|---|---|---|---|---|---|---|---|
| January | 17.3°C | 14.9°C | 20.0°C | 6.2 | 21 | 4 | 0% |
| February | 17.1°C | 14.7°C | 19.4°C | 6.9 | 30 | 4 | 1% |
| March | 17.6°C | 14.9°C | 19.3°C | 7.3 | 24 | 4 | 1% |
| April | 18.2°C | 15.5°C | 19.7°C | 7.9 | 12 | 3 | 0% |
| May | 19.6°C | 16.7°C | 20.4°C | 8.7 | 3 | 1 | 1% |
| June | 21.5°C | 18.7°C | 21.6°C | 10.4 | 2 | 1 | 3% |
| Julybest | 23.0°C | 20.2°C | 22.4°C | 11.5 | 0 | 0 | 10% |
| Augustbest | 24.0°C | 21.2°C | 23.3°C | 10.8 | 1 | 0 | 14% |
| SeptemberSelectedbest | 23.7°C | 20.9°C | 24.1°C | 8.8 | 4 | 1 | 13% |
| October | 22.1°C | 19.6°C | 23.8°C | 6.9 | 20 | 4 | 4% |
| November | 19.9°C | 17.7°C | 22.6°C | 5.8 | 26 | 5 | 2% |
| December | 18.3°C | 16.1°C | 21.1°C | 5.8 | 40 | 6 | 0% |
Day = average daytime high, night = average night-time low, 1991-2020.Sun is hours per day; rainy days count 1 mm or more.
Day, night and sea
Monthly average temperatures, 1991-2020
- Day
- Night
- Sea
Best months here
On warmth, low rainfall and sunshine, start with these.
Keep exploring
Similar in September
Closest matches on daytime temperature, sea temperature and sunshine, in other countries.
A little more detail
La Palma in September FAQs
Plain answers, grounded in the averages.
Is La Palma hot in September?
La Palma is warm in September: the average daytime high is 23.7°C and nights average 20.9°C. Roughly 1 in 8 September days reach 25°C.
Can you swim in the sea in La Palma in September?
The sea around La Palma averages 24.1°C in September, which is warm enough for most people to swim comfortably. Between 1991 and 2020 it ranged from 23°C to 25°C depending on the year.
How much does it rain in La Palma in September?
La Palma sees about 1 rainy days (1 mm or more) and 4 mm of rain in a typical September. The wettest September between 1991 and 2020 was 2010 (44 mm) and the driest was 1992 (0 mm).
How sunny is La Palma in September?
La Palma gets around 8.8 hours of sunshine a day in September out of 12.2 hours of daylight (estimated from average cloud cover).
How does La Palma compare with the UK in September?
La Palma is on average 5.1°C warmer than London by day in September (23.7°C against 18.6°C).
What is the hottest September on record in La Palma?
Between 1991 and 2020 the hottest September day in La Palma reached 35.8°C on 2020-09-08, and the coldest night dropped to 16.1°C on 2019-09-18.
How likely is very hot weather in September?
Very hot weather is unusual: just 1% of days reach 30°C, while 13% reach 25°C. September suits you better if you prefer moderate warmth to strong heat, though occasional hotter days remain possible.
Does the sea feel cold in September?
The sea averages 24.1°C, with a year-to-year range of 23°C to 25°C. That puts it comfortably in swimming territory rather than the bracing category. It is a good month to choose if a warmer sea is central to your holiday.
About these averages
ERA5-Land climate reanalysis via Open-Meteo (11 km grid) and NOAA Coral Reef Watch 5 km sea temperatures, 1991-2020
Averages computed from daily values at Los Llanos de Aridane. Sea temperature from the nearest 5 km sea cell, 3.8 km from that point. Sunshine hours are estimated from average cloud cover.Records are the highest and lowest daily values in that 30-year period, not all-time records. These are climate averages, not a forecast for your trip. How we measure holiday weather
- Hot · 25°C+
- Warm · 20°C to below 25°C
- Mild · 15°C to below 20°C
- Cool · below 15°C