Live Weather & Forecast
Weather in Welwyn
Hertfordshire, United Kingdom · Real-time conditions & 3-day outlook
13°C
Feels like 11°C
56°F / Feels 52°F
Overcast
Welwyn, Hertfordshire
🌞 Daytime
Updated: 2026-04-16 11:00
Humidity
72%
Wind
21.2 km/h WSW
Wind Gust
25.3 km/h
Pressure
1018 mb
Visibility
10 km
UV Index
2.1
(Low)
Precipitation
0.04 mm
Cloud Cover
100%
Dew Point
7°C
Wind Degree
236°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
155.9 μg/m³
NO₂
7.1 μg/m³
O₃
73 μg/m³
SO₂
1.4 μg/m³
PM 2.5
6 μg/m³
PM 10
13.6 μg/m³
Today's Hourly Forecast
24-hour breakdown for Welwyn, Hertfordshire
12 AM
8°
Partly Cloudy
1 AM
9°
Partly Cloudy
2 AM
9°
Overcast
3 AM
9°
Overcast
4 AM
8°
Cloudy
5 AM
9°
Overcast
6 AM
9°
Overcast
7 AM
10°
Overcast
8 AM
10°
Overcast
9 AM
11°
Cloudy
10 AM
13°
Patchy rain nearby
11 AM
13°
Overcast
12 PM
14°
Patchy rain nearby
1 PM
15°
Patchy rain nearby
2 PM
14°
Patchy rain nearby
3 PM
15°
Patchy rain nearby
4 PM
15°
Light rain shower
5 PM
14°
Light drizzle
6 PM
13°
Patchy rain nearby
7 PM
12°
Patchy rain nearby
8 PM
11°
Overcast
9 PM
10°
Cloudy
10 PM
10°
Overcast
11 PM
10°
Partly Cloudy
3-Day Forecast
Daily overview for Welwyn, Hertfordshire
Today
Patchy rain nearby
15°
/
8°
🌧️ 88% chance of rain
💧 Avg. humidity: 77%
💨 Max wind: 23 km/h
🌧️ Total precip: 0.74 mm
☀️ UV Index: 0.7
🌅 Sunrise: 06:02 AM
🌇 Sunset: 08:00 PM
🌙 Waning Crescent
🌑 Moon: 3% lit
Fri, Apr 17
Patchy rain nearby
16°
/
8°
🌧️ 85% chance of rain
💧 Avg. humidity: 81%
💨 Max wind: 23.8 km/h
🌧️ Total precip: 0.27 mm
☀️ UV Index: 0.9
🌅 Sunrise: 06:00 AM
🌇 Sunset: 08:02 PM
🌙 New Moon
🌑 Moon: 0% lit
Sat, Apr 18
Patchy rain nearby
13°
/
5°
🌧️ 87% chance of rain
💧 Avg. humidity: 79%
💨 Max wind: 21.2 km/h
🌧️ Total precip: 0.68 mm
☀️ UV Index: 1
🌅 Sunrise: 05:58 AM
🌇 Sunset: 08:03 PM
🌙 Waxing Crescent
🌑 Moon: 1% lit
Best Time to Visit Welwyn
Plan your trip to Welwyn, United Kingdom around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Welwyn?
Current conditions in Welwyn: Overcast, temperature 13°C, humidity 72%.
What is the best time to visit Welwyn?
The best time to visit Welwyn is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Welwyn?
Welwyn is located at approximately 51.8° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Welwyn?
The wettest period in Welwyn is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Welwyn?
For visits to Welwyn during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Welwyn in?
Welwyn is located in United Kingdom, in the state of Hertfordshire.
What are the public holidays in Welwyn in 2026?
View the 2026 public holidays for Welwyn on our Holidays page.
What are the GPS coordinates used for the weather forecast in Welwyn?
The weather forecast for Welwyn uses coordinates 51.8287, -0.2142.