UV Index in Lefors, United States

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents of Lefors, United States, where the climate can present distinct challenges related to sun exposure. With average UV levels peaking at 12 during midday hours, awareness of these levels is essential for protecting your skin from harmful rays and preventing sunburn. In this BSk climate zone, engaging in outdoor activities without proper sun protection can lead to long-term skin health issues. Stay informed about the UV Index to enjoy the sunny days of Lefors safely!

Hourly UV Index in Lefors

As the sun rises, the UV Index starts low at 1 at 07:00 and remains moderate until 09:00. However, by 10:00, the intensity escalates to a notable 5, marking the beginning of peak UV exposure. The highest readings occur between 12:00 and 14:00, where it reaches a staggering 12—an indication that protective measures are essential to avoid sunburn. As the day transitions towards evening, the index gradually declines, dropping to 8 at 16:00 and falling further to 1 by 19:00. This hourly UVI assessment clearly highlights the importance of sun safety during midday 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	1	low	45 min
09:00	3	moderate	30 min
10:00	5	moderate	30 min
11:00	8	very high	15 min
12:00	10	very high	15 min
13:00	12	extreme	10 min
14:00	12	extreme	10 min
15:00	10	very high	15 min
16:00	8	very high	15 min
17:00	5	moderate	30 min
18:00	3	moderate	30 min
19:00	1	low	45 min

Monthly UV Index Trends in Lefors

Throughout the year, the UV Index displays significant seasonal variations. The high-risk months, characterized by extreme UV levels and minimal burn times, are May through August, with June and July reaching a peak UV Index of 12 and an urgent burn time of just 10 minutes. As spring transitions to summer, the UV Index escalates from a moderate level of 4 in January to an extreme of 11 in May, then gradually declines again in fall and winter. Visitors and residents are advised to take precautions during these high-risk months, such as seeking shade, wearing protective clothing, and applying broad-spectrum sunscreen to minimize the risks of skin damage from UV exposure. In contrast, during the moderate months of November and December, exposure is less critical, but protective measures are still recommended. Stay informed and protect your skin year-round!

Monthly Maximum UV Index for Lefors, United States

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

The table above highlights how UV exposure in Lefors 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.

Lefors'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
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
Lefors	4	6	8	10	11	12	12	11	10	7	5	4
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5