UV Index in Kolkata, India

Last updated: July 2, 2025

Understanding the UV Index in Kolkata, India is crucial for safeguarding your skin health and preventing sunburn. With a tropical climate characterized by high temperatures and humidity, residents and visitors alike face significant UV exposure risks, particularly during the midday hours when the index can peak at a staggering 13. By being aware of the UV levels—ranging from a moderate 3 in the early morning to an extreme 12 around noon—you can take proactive measures to protect yourself from harmful rays and enjoy the vibrant outdoors with confidence.

Hourly UV Index in Kolkata

The UV Index data throughout the day reveals a dynamic pattern of sun exposure. Starting at 07:00, the index is at a mild 3, but it quickly ramps up as the sun rises. By 09:00, it soars to 9, reaching its peak of 13 at 11:00, signaling the most intense solar radiation and a high risk of harm without protection. As the afternoon progresses, the index declines, dropping to 4 by 15:00, and continues to diminish to 0 by 19:00, making late evening safe for outdoor activities. For those planning outings, it’s clear that midday hours are best suited for caution and proper sun safety measures!

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	3	moderate	30 min
08:00	6	high	25 min
09:00	9	very high	15 min
10:00	12	extreme	10 min
11:00	13	extreme	10 min
12:00	12	extreme	10 min
13:00	10	very high	15 min
14:00	7	high	25 min
15:00	4	moderate	30 min
16:00	2	low	45 min
17:00	1	low	45 min
18:00	0	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Kolkata

Throughout the year, UV Index levels exhibit significant seasonal changes, with high-risk months typically occurring from March to October. The UV Index peaks during the summer, reaching 13 in July, August, and September, indicating extreme exposure, where the burn time is as little as 10 minutes. Visitors and residents alike should take precautions, especially in the late spring and summer months, by wearing sunscreen, protective clothing, and sunglasses, and seeking shade during peak sun hours. In contrast, January and December demonstrate moderate UV levels with an index of 5, offering more manageable risks, while November and February present high levels at 7. Overall, it is crucial to stay vigilant about UV exposure, particularly during the spring and summer months, to ensure skin health and safety.

Monthly Maximum UV Index for Kolkata, India

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

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

Kolkata's solar exposure compared to other cities in India. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Delhi UVI	5	6	9	10	10	10	12	12	9	8	5	5
Kolkata	5	7	9	10	12	12	13	13	13	11	7	5
Mumbai UVI	8	9	10	11	11	12	13	13	11	10	7	7
Ahmedabad UVI	7	8	10	12	11	12	13	13	11	10	7	6
Hyderabad UVI	10	11	12	11	13	13	15	14	13	11	8	8
Bengaluru UVI	11	13	13	14	13	14	14	14	14	12	11	10