UV Index in Mattawa, United States

Last updated: July 2, 2025

In Mattawa, United States, awareness of the UV Index is crucial for safeguarding your skin and overall health. Understanding UV levels is essential not only for preventing sunburn but also for minimizing the long-term risks associated with skin damage. With a BSk climate, Mattawa experiences considerable UV exposure, especially during peak hours. During midday, the UV Index can soar to 10, indicating a very high risk of harm from unprotected sun exposure. Stay informed and protect yourself—knowing the UV Index can make all the difference in enjoying the sunshine safely!

Hourly UV Index in Mattawa

From 07:00 to 08:00, the UV Index starts off mild with a maximum of 1 to 2, making it a safe time for early outdoor activities. As the sun climbs higher, the UV levels rise sharply, reaching 4 by 09:00 and hitting 6 by 10:00. The intensity peaks at 13:00 with a significant 10, indicating high exposure risk, perfect for applying sunscreen and seeking shade. As we move into the afternoon, levels gradually decrease, tapering to 9 by 14:00 and falling back to a more manageable 4 by 17:00. By evening, UV levels drop to 2 at 18:00 and retreat to 1 by 19:00, marking a safe return for those looking to enjoy twilight outdoors. Remember, it's essential to stay vigilant during those peak hours!

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	6	high	25 min
11:00	8	very high	15 min
12:00	9	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	6	high	25 min
17:00	4	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Mattawa

The UV Index experiences significant seasonal fluctuations, with the highest risk occurring from May through August. During this period, the UV Index reaches very high levels of 8 to 10, necessitating caution as the burn time is reduced to just 15 minutes. April also marks a transition into high-risk months with an index of 6 and a burn time of 25 minutes. In contrast, January and December present the lowest UV exposure, categorized as low with burn times of 45 minutes. For visitors and residents, it is crucial to practice sun safety by seeking shade, wearing protective clothing, and applying sunscreen, especially during the high-risk months of May to August when UV levels peak.

Monthly Maximum UV Index for Mattawa, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Mattawa. 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 Mattawa, 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 Mattawa UV Index with Other United States Cities

The table above highlights how UV exposure in Mattawa 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.

Mattawa'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
Mattawa	2	3	5	6	8	9	10	9	7	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