The record for the warmest day in October may be broken tomorrow.

A warm spell will see highs of up to 23C on Saturday, 10 degrees above the usual autumn temperatures.

The warmest ever October day was recorded 115 years ago in Clongowes Woods.

It saw temperatures reach over 25C.

Alan O'Reilly from Carlow Weather said it will be warm but slightly overcast tomorrow.

"We have some very warm tropical air moving up from the south," he said.

"Through the weekend and early next week, temperatures will get up to 23C or even possibly 24C.

"The only spoil will be there will be a lot of cloud, unfortunately.

"There will be some hazy sunny spells but there will be a lot of cloud.

"It will feel unusually mild this time of the year with very warm air sitting over the country," he added.

Globally September 2023 was the warmest September on record.

Globally averaged surface air temperature anomalies relative to 1991–2020 for each September from 1940 to 2023. Data: ERA5. Image: C3S/ECMWF.

When combined with this year's record-breaking summer it puts 2023 on track to be the warmest year ever recorded.

September saw an average global surface air temperature of 16.38C – some 0.93C above the 1991-2020 average for September and 0.5C above the temperature of the previous warmest September, in 2020.

The month as a whole was around 1.75C warmer than the September average for 1850 to 1900, the pre-industrial reference period.

The global temperature for January to September was 0.52C higher than average, and 0.05C higher than the equivalent period in the warmest calendar year of 2016.

For January to September, the global mean temperature for 2023 to date is 1.40C higher than the pre-industrial average.

For Europe, this September was the warmest on record, at 2.51C higher than the 1991-2020 average, and 1.1C higher than 2020.

People enjoying sunshine at the Iveagh Gardens, Dublin in May 2022. Image: noel bennett / Alamy Stock Photo

In Ireland, the four warmest Septembers in order were 2021, 2006, 2023 and 1941.

These are the only Septembers with a mean temperature at or above 15C.

Some 24 Irish weather stations reported their highest temperature of the year last month, and 14 stations broke their September maximum temperature record.

Heatwaves were also reported at four stations between Monday September 4th and Friday September 8th, lasting between five and six days.

Additional reporting: Aoife Kearns

Main image: A woman enjoying the sunshine in Stephen's Green Park in Dublin in July 2021. Image: Leah Farrell / RollingNews.ie