UV Index in Grangeville, United States

Last updated: July 2, 2025

Staying informed about the UV Index is crucial for residents of Grangeville, United States, as it plays a vital role in safeguarding your skin health and preventing painful sunburns. With a climate that offers a mix of mild summers and cool, wet winters, understanding UV levels is essential—especially during peak times when the index can soar to 10 around noon. By knowing when UV exposure is at its highest, you can take proactive measures to protect yourself and enjoy the beautiful outdoors safely. Remember, knowledge is your best defense against the sun's harmful rays!

Hourly UV Index in Grangeville

At dawn, the UV Index starts off low at 1 at 07:00, making it a safe time for early risers. As the sun climbs higher, the index steadily increases, reaching 4 by 09:00. The real intensity hits around 11:00, peaking at 10 by 12:00 and 13:00, indicating a prime time for sun safety precautions like sunscreen and protective clothing. As the afternoon rolls in, the index begins to decline, dropping to 9 at 14:00 and then easing to 5 by 16:00. By 18:00, it falls to 2, and finally settles back at 1 by 19:00, allowing for safe post-sunset activities. Remember to check the UV Index throughout the day to stay protected!

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
Time	UVI	Category	Time to Burn
07:00	1	low	45 min
08:00	2	low	45 min
09:00	4	moderate	30 min
10:00	7	high	25 min
11:00	9	very high	15 min
12:00	10	very high	15 min
13:00	10	very high	15 min
14:00	9	very high	15 min
15:00	8	very high	15 min
16:00	5	moderate	30 min
17:00	3	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Grangeville

During the year, UV exposure varies significantly, with high-risk months typically occurring from March to September. The UV Index peaks at 10 in June and July, indicating an extremely high risk of harm from unprotected sun exposure, with a burn time of just 15 minutes. April and May also present considerable risk, featuring very high UV levels of 8 and 9 respectively. In contrast, the winter months of December, November, and January exhibit lower UV Index levels, with December registering a low index of 2 and a burn time of 45 minutes. Residents and visitors are advised to take necessary precautions, such as wearing sunscreen, protective clothing, and seeking shade during high UV Index months, especially when exposure can lead to skin damage in as little as 15 minutes.

Monthly Maximum UV Index for Grangeville, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Grangeville. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.

Data source: Statistical UV Index data for Grangeville, based on information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

Compare Grangeville UV Index with Other United States Cities

The table above highlights how UV exposure in Grangeville compares to other major locations across United States. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.

Grangeville's solar exposure compared to other cities in United States. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Grangeville	3	4	7	8	9	10	10	9	8	5	3	2
Chicago UVI	3	4	6	8	9	10	10	9	8	6	4	2
Brooklyn UVI	3	5	6	8	10	10	9	9	8	6	4	2
New York City UVI	3	5	6	8	10	10	9	9	8	6	4	2
Los Angeles UVI	4	6	8	9	10	11	11	10	10	7	5	4
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5