Welwyn Weather in September

In Welwyn, September brings pleasant daytime temperatures around 20°C (68°F), with nights cooling to 11°C (52°F). Some rainfall is to be expected.

Rainfall in Welwyn in September

You can expect rain on around 12 days based on historical patterns, with 55 mm (2.2 in) average for the month. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.

Temperature in Welwyn in September

September tends to be one of the perfect months in Welwyn, with 20°C (68°F) in the afternoon and 11°C (52°F) overnight. Even when the weather is stable, mornings and evenings can still feel distinctly cool. 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 in September

With about 155 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.

If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Welwyn.

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's climate page.

Welwyn 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 (41 KM, 25 Miles).

What to Wear in Welwyn in September

Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Welwyn 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's climate page.

More climate data for Welwyn

Temperature Rainfall Sunshine Humidity

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