Welwyn weather in September (Hertfordshire, United Kingdom)

How does the weather in Welwyn usually fare in September? Discover if this is the best time for your journey with our detailed monthly weather breakdown.

Temperatures

You’ll find the weather in Welwyn during September to be perfect, with pleasant temperatures and moderate rainfall. Expect temperatures to climb to 20°C during the day, with nighttime readings dropping to 11°C.

Precipitation

Welwyn in September usually receives moderate rainfall, averaging around 55 mm for the month. When we look at the climate data from the last 30 years, you can expect around 12 days of rain.

Average sunshine

The area experiences a moderate amount of sunshine, with approximately 155 hours of sunlight expected. This makes it neither too gloomy nor overly bright.

If you favor pleasant temperatures and minimal rainfall, September is one of the better months to visit Welwyn. June, July, August and September typically offer the most agreeable circumstances. On the other hand, January, February and December tend to be characterized by conditions that may not be as optimal.

For an in-depth look at the yearly conditions, visit our specialized Welwyn climate page with graphs.

 

Welwyn, monthly averages in September

Min Temperature 11°C  

Max Temperature 20°C  

Chance of Rain 40%  

Precipitation 55 mm  

Rainy days 12 days  

Humidity 73% *  

Sunshine 155 hours *  

Percentage Sunshine 40% *  

* Data from: London, the United Kingdom (41 KM, 25 Miles).

Where to go in the United Kingdom in September

Find out more about the weather in the United Kingdom and which places have the best travel conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

For visitors traveling to Welwyn, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

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

Interested in more climate information?

This site provides you with all the information you need about the climate in Welwyn.

Our site offers climate and forecast data for every country in the world. Are you going to the United Kingdom? On this website you can find historical weather averages for many cities in the United Kingdom. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.