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Sun and glare index
Do you need sunglasses right now, or just want them? We read the forecast for your city every half hour, take the cloud out of the clear-sky UV, and say which WHO category the hour falls in, when the sun sits low enough for glare, and the two daylight hours with the least sun.
- Night: no UV; clear lenses for driving, and blue-light glasses are a screen question, not a sun one
UV with the cloud taken out; the label is the WHO category. From 3 up, UV-rated sunglasses do a job; glare off water, snow and a low sun is the polarized question. Which frame suits your face →
Next 24 hours
| Time | Air | UV index |
|---|---|---|
| 11:00 PM | 46°F | 0 |
| 02:00 AM | 42°F | 0 |
| 05:00 AM | 40°F | 0 |
| 08:00 AM | 39°F | 0 |
| 11:00 AM | 38°F | 0 |
| 02:00 PM | 40°F | 0.3 |
| 05:00 PM | 47°F | 0.6 |
| 08:00 PM | 50°F | 0.3 |
Weather data: MET Norway · updated 11:11 PM
Sun and glare index by city
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 is for the sky you have. The label is the WHO category (low 0–2, moderate 3–5, high 6–7, very high 8–10, extreme 11+). UV is what sunglasses are for in the first place: the eye's lens and cornea take the same UV damage as skin, and a UV400 lens blocks wavelengths up to 400 nanometres whatever its tint. Dark lenses without a UV rating are worse than none, because the pupil opens behind them.
Glare is a different problem
Glare is reflected light: water, snow, wet road and car hoods. It peaks when the sun is low (morning and late afternoon driving) and on snow at any hour, so a low-UV winter day can be the worst day for glare. Polarized lenses cut reflected glare; they do nothing extra for UV, and they make some phone and dashboard screens go dark at an angle. Which frame suits your face →