Crumlin Weather in September

Crumlin in September sees moderate temperatures, with highs around 17°C (63°F) and overnight lows of 10°C (50°F). Rainfall is fairly high at around 76 mm (3 in) on average, so pack waterproofs just in case.

Rainfall in Crumlin in September

You can expect rain on around 19 days based on historical patterns, with 76 mm (3 in) average for the month. Rain falls on many days this month, but usually in relatively small amounts. A light waterproof is more useful than a heavy umbrella.

Temperature in Crumlin in September

Crumlin in September gets highs of 17°C (63°F) during the day and drops to 10°C (50°F) at night. Conditions are often most pleasant around the middle of the day. Nights cool down to 10°C (50°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Crumlin in September

The month experiences a moderate amount of sunlight, with 109 hours of sunshine. This provides a nice balance between sunshine and clouds.

Wind Speed in Crumlin in September

In September, average wind speeds reach 4 m/s (8 knots), leading to light to moderate breezes. Conditions vary from day to day, with both calm and windier periods.

Average water temperature in September

With water at 13°C (55°F), it's on the cooler side. Keen swimmers won't be put off, but those who prefer warm water may find it less enjoyable.

Should you favor a climate that's both dry and comfortably warm, July typically offers the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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

Crumlin Temperature in September

Min Temperature 10°C (50°F)  

Max Temperature 17°C (63°F)  

Water Temperature 13°C (55°F) *  

Chance of Rain 62%  

Precipitation 76 mm (3 in)  

Rainy days 19 days  

Humidity 91% *  

Windspeed 4 m/s (8 knots) *  

Sunshine 109 hours *  

Percentage Sunshine 28% *  

* Data from: Belfast, Ireland (3 KM, 2 Miles).

What to Wear in Crumlin in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. Expect water temperatures of around 13°C (55°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Crumlin in September

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

Swimming

6/10

Cycling

6/10

Walking

6/10

Camping

8/10

Outdoor sports

9/10

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 Crumlin's climate page.

More climate data for Crumlin

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

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