Normal weather for Ireland in September
It's cool to moderate in September in Ireland with an average temperature of 17°C. Temperatures this month range from a low of 15°C to a high of 19°C. At night, you can expect temperatures between 8°C and 12°C.
In September, there is an average of 63 mm of precipitation, spread over 9 days. The wind speed is around 4 Bft, mostly coming from the South.
Ireland in September |
New York | ||
|---|---|---|---|
 Average Temperature |
17°C | 27°C | |
 High Temp |
19°C | 31°C | |
| Low Temp |
15°C | 21°C | |
 Total Precipitation |
63 mm | 57 mm | |
| Rainy Days |
9 days | 9 days | |
Start of September
The month of September starts in Ireland with mild temps, averaging around 18°C during the day and nights around 12°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
With the temperature difference between day and night, it’s smart to wear layers. During the day, a shirt, maybe a light sweater, and thin pants will do. In the evening and morning, choose a light jacket, sweater or hoodie, and long pants.
Mid September
By mid-September, daytime temps drop to around 17°C, with nights around 11°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
Since it cools down at night, it’s a good idea to wear layers. During the day, choose a light jacket, sweater or hoodie, and long pants. In the evening and morning, go for a warm jacket, sweater or hoodie, and long pants.
End of September
By the end of September, the average daytime temperature in Ireland is around 16°C, while nighttime temps are about 9°C. A shower might pop up, but overall, the weather will be dry and sunny.
Because temperatures drop in the evening, wearing layers is recommended. During the day, choose a light jacket, sweater or hoodie, and long pants. In the evening and morning, go for a warm jacket, sweater or hoodie, and long pants.
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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 Ireland?
Looking for sun and warm weather? September isn’t a good month to be in Ireland. The temperatures are too low for a warm stay this month.
Temperature records for Ireland in September
Check out the climate of Ireland for all months and discover the best travel time
You can check out all destinations in Ireland to get the full picture of the climate.
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Daily Temperature in September in Ireland
This chart shows the average daily high and low temperatures in September for Ireland, 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.
Weather experiences in September in Ireland
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September in Ireland is mild, but you can expect rainy days ... more
Daily Precipitation in September in Ireland
The chart below shows the average daily precipitation in September for Ireland, 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 9 days of precipitation in Ireland.
Daily UV Index in September in Ireland
This chart shows the average daily UV index in September in Ireland, 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 Ireland Over the Years
This chart shows the average temperature in September in Ireland, measured in degrees Celsius, over the past few years.
Total Precipitation in September in Ireland Over the Years
This chart shows the average precipitation in September in Ireland, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily Climate in September for Ireland
Click on any day in September to get detailed info about the usual weather on that day in Ireland. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Ireland
The weather in September in Ireland is rated 3 out of 5 stars by 1 visitor. Have you been to Ireland? Share your weather experience to help other visitors.
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September in Ireland is mild, but you can expect rainy days and scant sunshine. The temperature hovers around 15 degrees. Not ideal for sun worshippers but ideal for nature lovers.— This text is automatically translated to English
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Average Weather in Ireland by Month
Click on a month below to see detailed weather info for Ireland. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
