Monday, October 19, 2026 · United States
Skin weather in Louisville UV index & humidity today
What today’s weather in Louisville does to your skin – based on current forecast data for UV, humidity and air quality.
Updated Oct 19, 2026, 4:10 AM local time
Today · Temperature5 to 19 °C
Low and high-
UV index
4.7
moderate
Peak UV index today: 4.7 – moderate.
From UV 3, the WHO recommends sun protection: sunscreen with SPF and shade around midday.
-
Humidity
37%indoors when heated
dry
Outdoors 70% humidity – heat it to 21 °C and only around 37% is left indoors.
Dry air draws moisture from your skin – a richer moisturiser makes sense today.
-
Pollen
–
No pollen forecast is available for this region.
-
Air quality
42EAQI
moderate
European Air Quality Index up to 42 – moderate. Fine dust (PM2.5) averages 5.7 µg/m³.
Fine dust settles on the skin – cleanse thoroughly but gently in the evening.
Tomorrow
- 7 to 22 °C
- UV 4.4 · moderate
- 34% · dry
- Air quality: moderate
Skin climate in Louisville through the year
When the air in Louisville is driest and when the sun is strongest – based on climate data from recent years.
- Indoor air in Louisville is driest in January: heated to 21 °C, humidity indoors drops to around 22%.
- 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.
- July brings the most sunshine, with around 354 hours.
| Month | Sunshine | Midday sun | Humidity outdoors | Indoors when heated | Avg. high |
|---|---|---|---|---|---|
| Jan | 171 h | 30° | 73% | 22% | 5.4 °C |
| Feb | 182 h | 38° | 67% | 24% | 7.8 °C |
| Mar | 235 h | 49° | 61% | 32% | 13.5 °C |
| Apr | 270 h | 61° | 65% | 43% | 19.3 °C |
| May | 312 h | 71° | 70% | – | 24.1 °C |
| Jun | 344 h | 75° | 69% | – | 28.8 °C |
| Jul | 354 h | 73° | 75% | – | 30.4 °C |
| Aug | 341 h | 66° | 74% | – | 30 °C |
| Sep | 283 h | 54° | 71% | – | 26.7 °C |
| Oct | 240 h | 42° | 69% | – | 20.1 °C |
| Nov | 193 h | 33° | 68% | 33% | 13 °C |
| Dec | 158 h | 28° | 74% | 29% | 7.5 °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 Louisville today?
Today (October 19) the UV index in Louisville reaches up to 4.7 – moderate. From UV 3, the WHO recommends sun protection: sunscreen with SPF and shade around midday.
How dry is the air in Louisville today?
Outdoors 70% humidity – heat it to 21 °C and only around 37% is left indoors. Dry air draws moisture from your skin – a richer moisturiser makes sense today.
When is the air driest in Louisville?
Indoor air in Louisville is driest in January: heated to 21 °C, humidity indoors drops to around 22%. From November to April, the average daily temperature stays below 15 °C – the time when heating is usually on.
When is UV strongest in Louisville?
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. July brings the most sunshine, with around 354 hours.
Your skin weather, every morning.
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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.