Monday, October 19, 2026 · Germany
Skin weather in Siegen UV index, humidity & pollen today
What today’s weather in Siegen 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 · Temperature8 to 14 °C
Low and high-
UV index
3
moderate
Peak UV index today: 3 – moderate.
From UV 3, the WHO recommends sun protection: sunscreen with SPF and shade around midday.
-
Humidity
41%indoors when heated
balanced
Outdoors 79% humidity – heat it to 21 °C and only around 41% is left indoors.
Balanced humidity – your usual routine works well.
-
Pollen
None
No significant pollen today.
-
Air quality
24EAQI
fair
European Air Quality Index up to 24 – fair. Fine dust (PM2.5) averages 12.2 µg/m³.
Clean air – no extra cleansing needed.
Tomorrow
- 5 to 12 °C
- UV 2.6 · moderate
- 35% · dry
- Pollen: none
- Air quality: fair
Skin climate in Siegen through the year
When the air in Siegen is driest and when the sun is strongest – based on climate data from recent years.
- Indoor air in Siegen is driest in January: heated to 21 °C, humidity indoors drops to around 26%.
- From October to May, the average daily temperature stays below 15 °C – the time when heating is usually on.
- From April to August, 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.
- June brings the most sunshine, with around 364 hours.
| Month | Sunshine | Midday sun | Humidity outdoors | Indoors when heated | Avg. high |
|---|---|---|---|---|---|
| Jan | 84 h | 18° | 89% | 26% | 4.2 °C |
| Feb | 134 h | 26° | 83% | 29% | 7.1 °C |
| Mar | 230 h | 36° | 73% | 28% | 10.8 °C |
| Apr | 266 h | 49° | 72% | 32% | 12.9 °C |
| May | 332 h | 58° | 71% | 44% | 18.2 °C |
| Jun | 364 h | 62° | 69% | – | 23 °C |
| Jul | 341 h | 61° | 72% | – | 23.1 °C |
| Aug | 329 h | 53° | 74% | – | 23.7 °C |
| Sep | 255 h | 41° | 80% | – | 19.7 °C |
| Oct | 154 h | 30° | 87% | 47% | 14.4 °C |
| Nov | 99 h | 20° | 90% | 34% | 8.1 °C |
| Dec | 64 h | 16° | 91% | 30% | 5.3 °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 Siegen today?
Today (October 19) the UV index in Siegen reaches up to 3 – moderate. From UV 3, the WHO recommends sun protection: sunscreen with SPF and shade around midday.
How dry is the air in Siegen today?
Outdoors 79% humidity – heat it to 21 °C and only around 41% is left indoors. Balanced humidity – your usual routine works well.
How high is the pollen count in Siegen today?
No significant pollen today.
When is the air driest in Siegen?
Indoor air in Siegen is driest in January: heated to 21 °C, humidity indoors drops to around 26%. From October to May, the average daily temperature stays below 15 °C – the time when heating is usually on.
When is UV strongest in Siegen?
From April to August, 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. June brings the most sunshine, with around 364 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.