Welwyn Garden City Weather in September

September in Welwyn Garden City typically sees daytime highs of 20°C (68°F) and nighttime lows of 11°C (52°F). Expect some rainfall during the month.

Rainfall in Welwyn Garden City in September

Expect around 12 days of rain based on historical data, with 55 mm (2.2 in) average. Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.

Temperature in Welwyn Garden City in September

September in Welwyn Garden City is generally excellent, with days reaching 20°C (68°F) and nights settling around 11°C (52°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With lows of 11°C (52°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Welwyn Garden City in September

The city usually sees around 155 hours of sunlight, indicating a moderately sunny period.

So this is a great month to visit if you prefer dry days with pleasant temperatures.

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For a detailed overview over the year and the best time to visit the United Kingdom, check out our Welwyn Garden City's climate page.

Welwyn Garden City Temperature in September

Min Temperature 11°C (52°F)  

Max Temperature 20°C (68°F)  

Chance of Rain 40%  

Precipitation 55 mm (2.2 in)  

Rainy days 12 days  

Humidity 73% *  

Sunshine 155 hours *  

Percentage Sunshine 40% *  

* Data from: London, the United Kingdom (39 KM, 24 Miles).

What to Wear in Welwyn Garden City in September

For Welwyn Garden City in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Welwyn Garden City in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

10/10

Walking

10/10

Barbeque

7/10

Camping

8/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United Kingdom, check out our Welwyn Garden City's climate page.

More climate data for Welwyn Garden City

Temperature Rainfall Sunshine Humidity

See the full Welwyn Garden City climate overview or explore weather in the United Kingdom.