Sun and glare index / Portland
Sun and glare in Portland right now
UV 0.5 · Low UV: air 50°F, feels like 50°F, least sun 17:00–19:00.
- Low UV: sunglasses right now are for glare, not UV
- Low sun on a wet road: the worst driving glare of the day; polarized lenses cut it
UV is MET Norway's clear-sky value with the hour's cloud taken out; the label is the WHO category. From 3 up, UV-rated sunglasses earn their place; glare (low sun, water, snow) is a separate question that polarized lenses answer.
Next 24 hours
| Time | Air | UV index |
|---|---|---|
| 11:00 PM | 50°F | 0.5 |
| 2:00 AM | 49°F | 0 |
| 5:00 AM | 47°F | 0 |
| 8:00 AM | 45°F | 0 |
| 11:00 AM | 43°F | 0 |
| 2:00 PM | 41°F | 0 |
| 5:00 PM | 42°F | 0.1 |
| 8:00 PM | 49°F | 0.6 |
Weather data: MET Norway · updated 11:30 PM · refreshes every 15 minutes
Sun and glare in Portland
Portland is moderate most of the year; the index moves with summer UV and with a low sun in the shoulder seasons, when glare on a wet road is the daily reason for sunglasses. The hour-by-hour table shows when the UV is lowest.
How the index works
MET Norway gives a clear-sky UV index for each hour; cloud takes up to 70% of it away, so the number here is for the sky you have. The WHO categories: low 0–2, moderate 3–5, high 6–7, very high 8–10, extreme 11+. Eyes take UV damage at any category over time (cataract and pterygium are the documented ones), so a UV400 lens matters more than how dark it is. Glare is reflected light and peaks with a low sun, water and snow; that is the polarized question, not the UV one.