Monday, October 19, 2026 · Spain
Skin weather in San Sebastián UV index, humidity & pollen today
What today’s weather in San Sebastián does to your skin – based on current forecast data for UV, humidity, pollen and air quality.
Updated Oct 19, 2026, 10:10 AM local time
Today · Temperature10 to 13 °C
Low and high-
UV index
1.2
low
Peak UV index today: 1.2 – low.
Up to UV 2, the WHO says most people need no sun protection.
-
Humidity
43%indoors when heated
balanced
Outdoors 78% humidity – heat it to 21 °C and only around 43% is left indoors.
Balanced humidity – your usual routine works well.
-
Pollen
None
No significant pollen today.
-
Air quality
26EAQI
fair
European Air Quality Index up to 26 – fair. Fine dust (PM2.5) averages 5.2 µg/m³.
Clean air – no extra cleansing needed.
Tomorrow
- 11 to 17 °C
- UV 3.8 · moderate
- 43% · balanced
- Pollen: none
- Air quality: fair
Skin climate in San Sebastián through the year
When the air in San Sebastián is driest and when the sun is strongest – based on climate data from recent years.
- Indoor air in San Sebastián is driest in January: heated to 21 °C, humidity indoors drops to around 39%.
- From November to April, the average daily temperature stays below 15 °C – the time when heating is usually on.
- From April to September, the midday sun climbs higher than 45° – your shadow is then shorter than you are. According to the WHO shadow rule, UV is then usually high.
- July brings the most sunshine, with around 349 hours.
| Month | Sunshine | Midday sun | Humidity outdoors | Indoors when heated | Avg. high |
|---|---|---|---|---|---|
| Jan | 180 h | 25° | 79% | 39% | 12.5 °C |
| Feb | 204 h | 33° | 77% | 42% | 14.5 °C |
| Mar | 267 h | 44° | 74% | 44% | 15.5 °C |
| Apr | 292 h | 56° | 77% | 48% | 16.7 °C |
| May | 341 h | 65° | 81% | – | 19.3 °C |
| Jun | 311 h | 70° | 84% | – | 23.1 °C |
| Jul | 349 h | 68° | 82% | – | 24.3 °C |
| Aug | 328 h | 60° | 82% | – | 25.1 °C |
| Sep | 275 h | 49° | 79% | – | 23.4 °C |
| Oct | 241 h | 37° | 78% | – | 21.7 °C |
| Nov | 177 h | 28° | 80% | 51% | 16.2 °C |
| Dec | 171 h | 23° | 81% | 45% | 14.3 °C |
Indoors when heated = humidity when outdoor air is warmed to 21 °C (only months with a daily average below 15 °C). Midday sun = sun angle in mid-month.
Frequently asked questions
What is the UV index in San Sebastián today?
Today (October 19) the UV index in San Sebastián reaches up to 1.2 – low. Up to UV 2, the WHO says most people need no sun protection.
How dry is the air in San Sebastián today?
Outdoors 78% humidity – heat it to 21 °C and only around 43% is left indoors. Balanced humidity – your usual routine works well.
How high is the pollen count in San Sebastián today?
No significant pollen today.
When is the air driest in San Sebastián?
Indoor air in San Sebastián is driest in January: heated to 21 °C, humidity indoors drops to around 39%. From November to April, the average daily temperature stays below 15 °C – the time when heating is usually on.
When is UV strongest in San Sebastián?
From April to September, the midday sun climbs higher than 45° – your shadow is then shorter than you are. According to the WHO shadow rule, UV is then usually high. July brings the most sunshine, with around 349 hours.
Your skin weather, every morning.
Lumée reads UV, humidity, pollen and air quality for your location and turns them into skincare that fits this exact day.
Skin weather nearby
All cities →Data: WDTEC GmbH’s own weather servers – temperature, UV index and humidity from weather models, air quality and pollen from the Copernicus Atmosphere Monitoring Service (CAMS). Ratings: UV per WHO, air quality per European Air Quality Index, pollen per NAB. Skincare tips are general recommendations and do not replace medical advice.