Castlereagh weather in September (Down County, United Kingdom)

How is September weather typically in Castlereagh? Find all the essential weather information for this month in our guide.

Temperatures

September in Castlereagh generally includes moderate temperatures and moderate rainfall. Enjoy the summer season during this month. Daytime temperatures are expected to be around 17°C, cooling off to about 11°C at night.

Precipitation

Castlereagh in September usually receives moderate rainfall, averaging around 85 mm for the month. Analyzing past climate data, one can expect approximately 17 days of rain.

Average sunshine

The month brings about 109 hours of sunlight, offering a comfortable mix of sun and shade.

If your ideal day consists of dry skies and moderate temperatures July and August generally stand out with the best circumstances. While January, February, March, November and December tend to showcase less optimal conditions.

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

 

Castlereagh, monthly averages in September

Min Temperature 11°C  

Max Temperature 17°C  

Water Temperature 13°C *  

Chance of Rain 56%  

Precipitation 85 mm  

Rainy days 17 days  

Humidity 91% *  

Windspeed 14 km/h *  

Sunshine 109 hours *  

Percentage Sunshine 28% *  

* Data from: Belfast, Ireland (24 KM, 15 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 Castlereagh, 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. With a water temperature of around 13°C there is no need to bring your swimwear.

What To Do

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

Swimming

5/10

Cycling

6/10

Walking

6/10

Camping

8/10

Outdoor sports

9/10

Interested in more climate information?

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

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.