Monday, October 19, 2026 · United States
Skin weather in Boston UV index & humidity today
What today’s weather in Boston 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 · Temperature2 to 13 °C
Low and high-
UV index
4.4
moderate
Peak UV index today: 4.4 – moderate.
From UV 3, the WHO recommends sun protection: sunscreen with SPF and shade around midday.
-
Humidity
32%indoors when heated
dry
Outdoors 79% humidity – heat it to 21 °C and only around 32% 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
29EAQI
fair
European Air Quality Index up to 29 – fair. Fine dust (PM2.5) averages 14.7 µg/m³.
Clean air – no extra cleansing needed.
Tomorrow
- 5 to 15 °C
- UV 3.6 · moderate
- 38% · dry
- Air quality: fair
Skin climate in Boston through the year
When the air in Boston is driest and when the sun is strongest – based on climate data from recent years.
- Indoor air in Boston is driest in January: heated to 21 °C, humidity indoors drops to around 18%.
- From October to May, 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 337 hours.
| Month | Sunshine | Midday sun | Humidity outdoors | Indoors when heated | Avg. high |
|---|---|---|---|---|---|
| Jan | 175 h | 26° | 67% | 18% | 3.2 °C |
| Feb | 187 h | 34° | 67% | 18% | 4.4 °C |
| Mar | 245 h | 45° | 64% | 24% | 9 °C |
| Apr | 262 h | 57° | 66% | 31% | 13.4 °C |
| May | 315 h | 66° | 70% | 47% | 18.7 °C |
| Jun | 325 h | 71° | 74% | – | 23.9 °C |
| Jul | 337 h | 69° | 77% | – | 26.9 °C |
| Aug | 331 h | 61° | 76% | – | 26 °C |
| Sep | 258 h | 50° | 78% | – | 22.3 °C |
| Oct | 231 h | 38° | 75% | 48% | 17.6 °C |
| Nov | 213 h | 29° | 66% | 29% | 11.3 °C |
| Dec | 170 h | 24° | 69% | 22% | 6 °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 Boston today?
Today (October 19) the UV index in Boston reaches up to 4.4 – moderate. From UV 3, the WHO recommends sun protection: sunscreen with SPF and shade around midday.
How dry is the air in Boston today?
Outdoors 79% humidity – heat it to 21 °C and only around 32% is left indoors. Dry air draws moisture from your skin – a richer moisturiser makes sense today.
When is the air driest in Boston?
Indoor air in Boston is driest in January: heated to 21 °C, humidity indoors drops to around 18%. From October to May, the average daily temperature stays below 15 °C – the time when heating is usually on.
When is UV strongest in Boston?
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 337 hours.
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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.