Nashua, New Hampshire UV Index
Nashua UV index today — burn time, EPA scale, and sun-protection guidance
Nashua, NH · UV Index right now
Skin burns in ~24 min
UV 5.5Extreme
A UV index of 5.5 means unprotected skin can begin to burn in roughly 16 minutes for the most sun-sensitive skin types (Fitzpatrick type I).
Peak UV today: 10:52 AM–2:52 PM
Estimated from today’s sunrise and sunset: UV is strongest in the two hours either side of solar noon (12:52 PM local time).
EPA UV Index scale
Current reading: UV 5.5 — Extreme.
Sun protection right now
- SPF & cover-up
- Take all precautions: SPF 50+ broad-spectrum sunscreen, protective clothing, and minimize sun exposure midday.
- Reapply
- Reapply every two hours and after swimming or heavy sweating.
- Safe exposure
- Unprotected fair-to-medium (Fitzpatrick III) skin can begin to burn in about 24 minutes at this UV level. Sunscreen, shade, and cover-up extend that window.
EPA / WHO sun-safety guidance; type III skin baseline. Current band: Extreme.
Burn time by skin type
The current UV index is 5.5 (Extreme) — unprotected skin can begin to redden fastest for the fairest (Fitzpatrick type I) skin and slowest for the darkest (type VI).
See the full minutes-to-burn table for every UV level and all six skin types in the sunburn-time guide.
Sun protection for today's UV
- EltaMD UV Clear SPF 46 Face Sunscreen
Broad-spectrum mineral-chemical face sunscreen. Lightweight, non-greasy — the dermatologist standby for daily high-UV exposure.
- La Roche-Posay Anthelios SPF 60 Body Sunscreen
Broad-spectrum SPF 60 for arms, shoulders, and legs. Water-resistant for 80 minutes — reapply after swimming or heavy sweat.
- Coolibar UPF 50+ Long-Sleeve Swim Shirt
UPF 50+ rash guard blocks ~98% of UV. A physical layer outperforms any sunscreen on the skin it covers — no reapplication needed.
- Wallaroo UPF 50+ Wide-Brim Sun Hat
A 3-inch+ brim shades the face, ears, and neck — the spots people forget to re-apply sunscreen and where most skin cancers start.
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UV through the year in Nashua
This far north the sun sits low for much of the year, so UV in Nashua is concentrated in the high-summer months and peaks in June, when the estimated clear-sky peak UV index reaches about 11 around solar noon. At that peak the noon sun reaches about 71° above the horizon. Each month below pairs the noon sun elevation with the estimated peak UV and how fast unprotected skin can begin to redden.
| Month | Noon sunelevation | Peak UVclear-sky est. | Type Imin to burn | Type IIImin to burn | Type VImin to burn |
|---|---|---|---|---|---|
| January | 26° | 2 | — | — | — |
| February | 35° | 3 | 30 | 44 | 148 |
| March | 45° | 5 | 18 | 27 | 89 |
| April | 57° | 8 | 11 | 17 | 56 |
| May | 66° | 10 | 9 | 13 | 44 |
| June | 71° | 11 | 8 | 12 | 40 |
| July | 69° | 11 | 8 | 12 | 40 |
| August | 61° | 9 | 10 | 15 | 49 |
| September | 50° | 7 | 13 | 19 | 63 |
| October | 39° | 4 | 22 | 33 | 111 |
| November | 29° | 2 | — | — | — |
| December | 24° | 1 | — | — | — |
Clear-sky estimate from sun angle and elevation — day-to-day clouds and ozone shift the real index up or down. Burn times are first-redness approximations for unprotected skin, not a safe-exposure budget.
Frequently asked
- When is UV strongest in Nashua?
- In Nashua the sun rides highest around June, when the estimated clear-sky peak UV index reaches about 11. Within any day it peaks near solar noon — roughly 10 a.m. to 4 p.m. local time. It is also stronger at higher elevation and near reflective surfaces like water, sand, and snow.
- Can you get sunburned on a cloudy day in Nashua?
- Yes. Up to about 80% of UV radiation passes through clouds, so you can still burn in Nashua on an overcast day. The WHO notes that thin or scattered cloud offers little protection — check the UV Index, not the sky.
UV & sun-safety guides
See how the UV Index works — including why clouds are no shield — plus evergreen guides to burn time, vitamin D, skin-cancer risk, and when UV is strongest, collected on the UV Index hub.
More for Nashua
See the full Nashua, NH weather forecast — hour-by-hour outlook, NOAA radar, satellite, and air quality.