UV Index in Walthamstow, United Kingdom — Today, 3 October

Q: What is the UV index in Walthamstow today?

The live value is shown at the top of the page; the hourly chart gives today's full forecast for Walthamstow (WHO scale 0–11+).

Q: What is the highest UV index in Walthamstow?

The calculated clear-sky maximum is ≈ 7.1 in June. Values of 11–12 do not occur here — only near the equator, in deserts and high mountains.

Q: When do I need SPF in Walthamstow?

The UV index reaches 6+ in May, June, July and August: use SPF 30–50+ on sunny days.

Q: Can I tan in Walthamstow?

The comfortable tanning window (UV 2–5) is February, March, September, October and November.

Q: What UV index is dangerous?

8 and above. In Walthamstow such levels are practically impossible (local max ≈ 7.1).

What is the UV index? The UV index (ultraviolet index) is the WHO scale 0–11+ of sunburn-risk intensity at the Earth's surface: 0–2 low, 3–5 moderate, 6–7 high, 8–10 very high, 11+ extreme. The higher the number — the faster skin burns. Below is the live value for Walthamstow today, 3 October.

UV index by month (clear sky)

Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
1.7	2.7	4.1	5.7	6.6	7.1	7	6.2	5	3.6	2.4	1.6

The table shows the calculated noon UV peak for latitude 51.5907° under clear sky. Real values vary with clouds, ozone and altitude — see the hourly chart for today's exact forecast.

UV climate of Walthamstow: local facts

Walthamstow sits at 51.5907° latitude (Northern hemisphere, temperate zone). The UV index here climbs from 1.6 in December to a peak of ≈ 7.1 in June; the annual average is ≈ 4.5. On a peak day, unprotected fair skin burns in about 17 minutes.

📈 Peak: ≈ 7.1 in June · calmest month: December (1.6).
🧴 SPF season (UV 6+): May, June, July and August — use SPF 30–50+ on sunny days.
🌤 Comfortable tanning window (UV 2–5): February, March, September, October and November — slower tan, no burn.
🌍 UV 11–12 here? Impossible: the local maximum is ≈ 7.1. Values of 11+ occur only near the equator, in deserts and high mountains.
💊 Vitamin D: from November to February the UV stays below 3 — skin does not synthesize vitamin D; get it from food or supplements.

What UV index 8, 10, 11 and 12 mean

Value	WHO category	Time to burn (fair skin)
8–10	Very high	15–25 minutes
11+	Extreme	5–10 minutes
12	Maximum at surface	under 10 min; tropics & mountains only

The highest UV index on Earth reaches 12–14 at sea level (equator, deserts, Australia) and above 20 in the Andes. In mid-latitudes summer peaks are 7–8, in the south 9–11. See the monthly table above for Walthamstow's peaks.

Sun protection tips for Walthamstow

🧴 SPF: at UV 3+ apply SPF 30+ 20 min before going out, reapply every 2 hours and after swimming.
🕶 Sunglasses: UV400 or 100% UV protection only.
👒 Hat: a brim of at least 7 cm during midday hours.
⛱ Shade: 11:00–16:00 whenever the index is 6+.

How the UV data for Walthamstow is calculated

Live hourly values come from Open-Meteo (ECMWF & NOAA models); the monthly table is a clear-sky calculation for latitude 51.5907° on the WHO 0–11+ scale. Real values vary with clouds, ozone and altitude.

Nearby cities

Leytonstone Tottenham Hale Chingford Woodford Green Tottenham Edmonton Stamford Hill Ponders End

FAQ: UV index in Walthamstow

What is the UV index in Walthamstow today, 3 October?

The live value is at the top of this page; the hourly chart shows today's full forecast, and the status block shows tomorrow's peak. The UV index (WHO scale 0–11+) measures sunburn intensity: the higher, the faster skin burns.

What is the highest UV index in Walthamstow?

The calculated clear-sky maximum is ≈ 7.1 in June. Values of 11–12 do not occur here — they are only possible near the equator, in deserts and high mountains (world records above 20 were set in the Andes).

When do I need SPF in Walthamstow?

The UV index reaches 6+ in May, June, July and August: use SPF 30–50+ on sunny days, reapply every 2 hours.

Can I tan in Walthamstow?

The most comfortable tanning window (UV 2–5) is February, March, September, October and November — the tan develops slower but lasts longer.

What UV index is dangerous?

8 and above: fair skin burns in 10–20 minutes; at 11+ in under 10. In Walthamstow such levels are practically impossible — the local maximum is ≈ 7.1.

What is the UV index tomorrow in Walthamstow?

The forecast peak for tomorrow is shown in the status block («tomorrow»); the hourly forecast for today is in the chart above.

Hourly UV in Walthamstow