Average weather for Wales in September
It's pleasantly warm in September in Wales with an average temperature of 19°C. Temperatures this month range from a low of 16°C to a high of 20°C. At night, you can expect temperatures between 10°C and 14°C.
Start of September
The month of September starts in Wales with mild temps, averaging around 20°C during the day and nights around 13°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
Mid September
By mid-September, daytime temps drop to around 19°C, with nights around 12°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of September
By the end of September, the average daytime temperature in Wales is around 18°C, while nighttime temps are about 11°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
In September, there is an average of 92 mm of precipitation, spread over 13 days. The wind speed is around 4 Bft, mostly coming from the Southwest.
Wales in September |
New York | ||
|---|---|---|---|
 Average temperature |
19°C | 27°C | |
 Max. temperature |
20°C | 31°C | |
| Min. temperature |
16°C | -5°C | |
 Total precipitation |
92 mm | 57 mm | |
| Rainy days |
13 days | 9 days | |
August
UV index
The UV index is a maximum of 5 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is September a good time to visit Wales?
Looking for great weather? September is a good time to be in Wales. The temperatures are nice, and there’s not too much rain.
Temperature records
With 28°C in 2021, Wales reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 10°C in 2018. The extreme nighttime temperatures ranged from a lowest recorded value of 0°C to a highest value of 21°C.
Check out the climate of Wales for all months and discover the best travel time
The climate in Wales is based on weather data from Cardiff. Other spots might have different weather. You can check out all destinations in Wales to get the full picture of the climate.
Daily Temperature in September in Wales
This chart shows the average daily high and low temperatures in September for Wales, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Wales
The chart below shows the average daily precipitation in September for Wales, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 13 days of precipitation in Wales.
Daily UV index in September in Wales
This chart shows the average daily UV index in September in Wales, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Wales over the years
This chart shows the average temperature in September in Wales, measured in degrees Celsius, over the past few years.
Total precipitation in September in Wales over the years
This chart shows the average precipitation in September in Wales, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in September for Wales
Click on any day in September to get detailed info about the usual weather on that day in Wales. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Wales
Have you been to Wales in September?
Share your weather experience in September in Wales.
Average weather in Wales by month
Click on a month below to see detailed weather info for Wales. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
