At solar noon (12:53:59 PM) the sun reaches 41.2° above the horizon in Napa. Without clouds, that corresponds to a maximum UV index of about 4.1 (moderate). Clouds usually lower the real value; snow, sand, water and altitude can raise it.
UV index in Napa, next 14 days
| Date | Sun at noon | Clear-sky max | Forecast max |
|---|---|---|---|
| 41.2° | 4.1 Moderate | — | |
| 40.8° | 4.0 Moderate | — | |
| 40.5° | 4.0 Moderate | — | |
| 40.1° | 3.9 Moderate | — | |
| 39.8° | 3.8 Moderate | — | |
| 39.4° | 3.8 Moderate | — | |
| 39.1° | 3.7 Moderate | — | |
| 38.7° | 3.6 Moderate | — | |
| 38.4° | 3.6 Moderate | — | |
| 38.1° | 3.5 Moderate | — | |
| 37.7° | 3.5 Moderate | — | |
| 37.4° | 3.4 Moderate | — | |
| 37.1° | 3.3 Moderate | — | |
| 36.8° | 3.3 Moderate | — |
Clear-sky values are calculated from the sun's height at solar noon (cloud-free sky, average ozone). Forecast values from Open-Meteo include clouds and load in your browser.
High UV today? Sport sunscreen with SPF 100 stays on through sweat — essential for long outdoor activities.
View on Amazon →About Napa
Napa is a city located in the state of California. It covers an area of 46.7 square kilometres and sits along the banks of the Napa River. As of 2020, the population of the municipality was 79,246. The city features the COPIA museum, the Napa Valley Opera House, and the First Street Bridge among its notable structures. Formal relationships exist between the city and its twin towns of Iwanuma, Telavi, Launceston, and Casablanca. Local infrastructure includes the Goodman Library, Tulocay Cemetery, and the Uptown Theater, which serves as both a theatre building and a movie theatre for the area.
AI-assisted description based on geographic data and editorial notes.