Monday, October 19, 2026 · Japan
Skin weather in Sendai UV index & humidity today
What today’s weather in Sendai does to your skin – based on current forecast data for UV, humidity and air quality.
Updated Oct 19, 2026, 5:10 PM local time
Today · Temperature13 to 22 °C
Low and high-
UV index
1.7
low
Peak UV index today: 1.7 – low.
Up to UV 2, the WHO says most people need no sun protection.
-
Humidity
79%outdoors
humid
Average humidity today: 79%.
Humid air – lighter textures often feel more comfortable today.
-
Pollen
–
No pollen forecast is available for this region.
-
Air quality
27EAQI
fair
European Air Quality Index up to 27 – fair. Fine dust (PM2.5) averages 13.9 µg/m³.
Clean air – no extra cleansing needed.
Tomorrow
- 14 to 18 °C
- UV 0.7 · low
- 96% · humid
- Air quality: fair
Skin climate in Sendai through the year
When the air in Sendai is driest and when the sun is strongest – based on climate data from recent years.
- Indoor air in Sendai is driest in January: heated to 21 °C, humidity indoors drops to around 21%.
- From November to April, the average daily temperature stays below 15 °C – the time when heating is usually on.
- From March 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.
- August brings the most sunshine, with around 278 hours.
| Month | Sunshine | Midday sun | Humidity outdoors | Indoors when heated | Avg. high |
|---|---|---|---|---|---|
| Jan | 236 h | 30° | 74% | 21% | 5.5 °C |
| Feb | 234 h | 38° | 70% | 21% | 6.8 °C |
| Mar | 261 h | 49° | 69% | 28% | 11.9 °C |
| Apr | 276 h | 61° | 69% | 41% | 17.5 °C |
| May | 273 h | 71° | 74% | – | 21.5 °C |
| Jun | 268 h | 75° | 81% | – | 25.6 °C |
| Jul | 266 h | 73° | 83% | – | 29.9 °C |
| Aug | 278 h | 66° | 84% | – | 30.6 °C |
| Sep | 233 h | 54° | 84% | – | 26.9 °C |
| Oct | 220 h | 42° | 80% | – | 20.4 °C |
| Nov | 232 h | 33° | 77% | 40% | 15.1 °C |
| Dec | 218 h | 28° | 77% | 26% | 8.1 °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 Sendai today?
Today (October 19) the UV index in Sendai reaches up to 1.7 – low. Up to UV 2, the WHO says most people need no sun protection.
How dry is the air in Sendai today?
Average humidity today: 79%. Humid air – lighter textures often feel more comfortable today.
When is the air driest in Sendai?
Indoor air in Sendai is driest in January: heated to 21 °C, humidity indoors drops to around 21%. From November to April, the average daily temperature stays below 15 °C – the time when heating is usually on.
When is UV strongest in Sendai?
From March 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. August brings the most sunshine, with around 278 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.