UV Index in Guatemala City Today
September 3, 2026 · Guatemala City, Guatemala
Capital994,938 people
See today's UV index in Guatemala City hour by hour below. The UV index shows how strong the sun's ultraviolet radiation is — the higher the number, the faster skin can burn. Values are calculated for Guatemala City's coordinates and updated daily.
UV has dropped for today
Hour by hour
Clouds cut the peak by ~22%Protection windowClear sky
Remember today
- Sunscreen SPF 50+
- Sunglasses
- Hat
- Shade at midday
- Cover up
Daylight: sunrise 05:51 – sunset 18:14
Tomorrow: UV 12 at its peak around 11:00
The UV index in Guatemala City peaks at 9 (very high) around 11:00 today. Sun protection is recommended between 08:21 and 14:54, while the index stays at 3 or above. Cloud cover is damping the peak by roughly 22% compared with a clear sky. Tomorrow the index is forecast to peak at 12 around 11:00.
UV index in Guatemala City hour by hour
| Time | UV index | Level |
|---|---|---|
| 05:00 | 0 | Low |
| 06:00 | 0.1 | Low |
| 07:00 | 0.5 | Low |
| 08:00 | 2.1 | Low |
| 09:00 | 4.7 | Moderate |
| 10:00 | 7.2 | High |
| 11:00 | 9.1 | Very high |
| 12:00 | 9.1 | Very high |
| 13:00 | 7.4 | High |
| 14:00 | 4.8 | Moderate |
| 15:00 | 2.8 | Low |
| 16:00 | 1.3 | Low |
| 17:00 | 0.4 | Low |
| 18:00 | 0 | Low |
| 19:00 | 0 | Low |
UV index in Guatemala City
Guatemala City lies at 15°N. The midday sun reaches 82.9° above the horizon in Guatemala City today, and twice a year it passes straight overhead. Elevation is what sets the ceiling for UV, and over Guatemala City it is so steep that the rays take the shortest possible path through the atmosphere, and the index can reach extreme values.
What is the UV index?
The UV index is an international scale describing the strength of the sun's ultraviolet radiation at ground level. It starts at 0 and is effectively open-ended — at mid-latitudes it rarely exceeds 8, while in the tropics and high in the mountains it can pass 11. The higher the number, the less time it takes to get sunburnt.
The UV index depends mainly on how high the sun is in the sky. That is why it peaks around solar noon and is greatest in summer near the longest day of the year. Clouds, ozone, altitude and reflection from snow or water also affect the value.
The WHO UV scale
| UV index | Level | Recommendation |
|---|---|---|
| 0–2 | Low | No special protection needed. |
| 3–5 | Moderate | Use sunscreen (SPF 30+), seek shade around midday. |
| 6–7 | High | Sunscreen, hat and sunglasses. Avoid the sun 12:00–15:00. |
| 8–10 | Very high | Extra protection. Limit midday sun exposure. |
| 11+ | Extreme | Avoid the sun at midday. Full protection required. |