Cowbridge, United Kingdom — Weather in September 2026

Climate Overview

Cowbridge, United Kingdom in September has mild conditions, with highs averaging 17.7°C (64°F) and noticeably cooler mornings. Rain falls on about 14 days this month. Sea temperature stays cool at 17.7°C (64°F).

This month falls at the beginning of Autumn.

Daily highs in September gradually drop from around 19°C (66°F) at the start to 16°C (60°F) by month's end.

Rainfall is heaviest during the last third of the month, while the middle tends to be drier.

Expect around 7.6h of sunshine at the start of September, decreasing to 6.7h by the end.

Wind speeds pick up through the month, from 22 km/h (13 mph) to 25 km/h (16 mph).

The warmest days tend to fall around the 5th, averaging 19.2°C (67°F).

Compared to August, this month is about 2°C cooler with 1 more rainy days. Temperatures begin dropping heading into October.

Monthly September Averages

Temperature

18°C / 13°C

Feels Like

16°C / 11°C

Rain

14 days · 116 mm

Sunshine

7.8h / day

Humidity

82% — Very Humid

Wind

23 km/h

Wind Direction

W (261°)

Gusts

42 km/h

Daylight

12.6 h

Cloud Cover

69%

Clear Sky Days

1.6

UV Index

3.8 — Moderate

Sea Temperature

18°C

Dew Point

12°C — Comfortable

Moon Phase

Waxing Crescent · 11%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

High Low

Daily Precipitation

Rainfall

Daily Sunshine

Sunshine

Daily Wind Speed

Wind Speed

Sun Position

Sunrise 06:49

Daylight 12.7h

Sunset 19:28

What to Expect

Keep afternoons flexible as tropical showers are common — they typically clear within an hour.

Wet weather can spread across much of the day, so it is best to keep outdoor plans flexible.

2 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January	8°C / 4°C	4°C / -1°C	14days (103 mm) Wet	4h Fair	87% Very Muggy	1.1 Low	Poor	View Details
February	9°C / 4°C	4°C / 0°C	13days (99 mm) Wet	5.2h Fair	84% Humid	1.5 Low	Poor	View Details
March	10°C / 5°C	6°C / 0°C	15days (95 mm) Wet	7h Good	82% Humid	3.3 Moderate	Poor	View Details
April	13°C / 6°C	10°C / 2°C	11days (62 mm) Wet	9.6h Good	77% Humid	4.5 Moderate	Fair	View Details
May best	16°C / 9°C	14°C / 7°C	11days (67 mm) Wet	11h Excellent	77% Humid	5.6 High	Good	View Details
June best	18°C / 12°C	17°C / 11°C	12days (72 mm) Wet	11.1h Excellent	78% Humid	6.3 High	Good	View Details
July best	20°C / 14°C	19°C / 13°C	12days (76 mm) Wet	11.2h Excellent	78% Humid	5.8 High	Excellent	View Details
August best	20°C / 14°C	19°C / 13°C	13days (84 mm) Wet	10.1h Excellent	79% Humid	5.2 High	Excellent	View Details
September best	18°C / 13°C	16°C / 11°C	14days (116 mm) Wet	7.8h Good	82% Humid	3.8 Moderate	Good	View Details
October	14°C / 10°C	12°C / 7°C	16days (129 mm) Wet	6.1h Fair	84% Humid	2.4 Moderate	Fair	View Details
November	11°C / 7°C	8°C / 3°C	15days (124 mm) Wet	4.5h Fair	86% Very Muggy	1.3 Low	Poor	View Details
December	9°C / 5°C	5°C / 1°C	16days (135 mm) Wet	3.3h Poor	88% Very Muggy	0.8 Low	Poor	View Details

What to Wear

Bundle up with a warm coat, scarf, and closed-toe shoes. Thermal layers underneath give flexibility between indoors and outdoors.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

Layered clothingLight jacketUmbrellaWaterproof jacketWaterproof shoes

Frequently Asked Questions

Expand all

Is September a good time to visit Cowbridge?

September is typically good for visiting Cowbridge, with average highs of 18°C (64°F) and around 14 rainy days. Cowbridge, United Kingdom in September has mild conditions, with highs averaging 17.7°C (64°F) and noticeably cooler mor

Does it rain a lot in Cowbridge in September?

Cowbridge typically sees around 14 rainy days in September with 116 mm (4.6 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Cowbridge in September?

Evenings in Cowbridge during September are mild at 13°C (55°F). A light cardigan is usually enough.

What should I pack for Cowbridge in September?

With highs of 18°C (64°F) and lows of 13°C (55°F) in September, we recommend: Layered clothing, Light jacket, Umbrella, Waterproof jacket, Waterproof shoes. Comfortable walking shoes are essential.

Is September among the best months weather-wise in Cowbridge?

Yes, September offers some of the best weather conditions in Cowbridge with comfortable temperatures and lower chances of rain.

What is the UV index in Cowbridge in September?

The average UV index in Cowbridge during September is 4 (moderate). Sunscreen and sunglasses are recommended during midday hours.

How many hours of daylight are there in Cowbridge in September?

Cowbridge gets approximately 13 hours of daylight per day in September, with around 8 hours of sunshine.

Does it snow in Cowbridge in September?

Snow is uncommon in Cowbridge during September based on 10-year climate averages.

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