Extreme Temperatures
The previous record low for May 24 was -0.6 Celsius nine years ago, Onwuka said.
The cold weather, which has led to temperatures no warmer than 10 Celsius in places during the day, will continue in to the weekend.
On Friday, cold weather records are likely to be broken again, as the temperature hovers between 8 and 11 Celsius. The coldest May 24 on record was 10.4 and dates from 1975.
The temperature at the end of May usually averages around 18 Celcius.

Clonmacnoise monastery in the Irish Midlands. This was a center of recording of annalistic manuscripts from around A.D. 700 to A.D. 1200.
The study, published today in the journal Environmental Research Letters, reconstructed the history of cold events in Ireland from the fifth through 17th centuries A.D., based on more than 40,000 writings of scribes and monks from that time. The history of volcanic eruptions was also recreated based on levels of sulfate found in Greenland ice cores - an accepted method to date past eruptions, said study author and Harvard researcher Francis Ludlow. By comparing the two sources, Ludlow and his colleagues found cold events were more likely to occur in the years after these eruptions: More than half of the 69 coldest periods happened in the years following huge volcanic eruptions, Ludlow said.
"This suggests that a very major volcanic eruption can have a long-lasting impact on climate, with extreme cold occurring for possibly several years after an event," Ludlow told LiveScience.
Meteorologists say the anomaly occurred because a cyclone brought cold Arctic air from Kara Sea region into Siberia dropping, temperature to lows typical for summer north of the Arctic Circle.
Bloggers were at a loss when commenting the issue.
"Snow in Kemerovo TODAY? That's hardcore. The weather must've forgot it's June."
"With a sense of terror has just learnt it's been snowing in Kemerovo. What's next?"
"Tornado in the US. Floods in Czech Republic. SNOW in Kemerovo!"
The city in South Siberia is situated on 55°22'17.58" north latitude but even for that region -2 Celsius on June 2 morning is over the top. The region has seasonal inland climate, which means really cold winters and very hot summers.
'Cursed spring' of relentless rain: Italy just went through its wettest spring in at least 150 years
June normally heralds the arrival of summer heat, but 2013's capricious weather is fuelling new meteorological obsession

Pope Francis surrounded by Catholics sheltering from the heavy rain under umbrellas in St Peter's Square this week.
Italian springs are often strange, but this one will perhaps be remembered as particularly capricious. As with much of northern Europe, the country has shivered its way through a good deal of the year. In the north-west, according to the Italian meteorological society, residents have had the coldest May since 1991. In much of the north-east, the spring has been the wettest for at least 150 years. A mountain stage of the Giro d'Italia bike race was called off due to snow and ice. Beach resorts in Tuscany have been flooded. Many farmers have suffered huge damage to their crops.
Now, as June arrives, it should technically be summer. But it certainly doesn't feel like it. "Last year, by this point, we were going to the sea. At the beginning of June we went down to the Fori Imperiali and sunbathed," said Mario Ramelli, a street-corner florist in central Rome. This spring's brutto tempo has been a topic of conversation with many of his customers - that is, those who stop to buy a pot of pansies or, optimistically, some sunflowers. "When it's horrid and wet, people hurry by," said Ramelli. "It's not good for work."
Comment: How's the weather where you are?
Notice anything about the climate in the past couple of years?
Under Lysenko's view, for example, grafting branches of one plant species onto another could create new plant hybrids that would be perpetuated by the descendants of the grafted plant. Or modifications made to seeds would be inherited by later generations stemming from that seed. Or that plucking all the leaves off of a plant would cause descendants of the plant to be leafless.
Lysenkoism was "politically correct" (a term invented by Lenin) because it was consistent with certain broader Marxist doctrines. Marxists wanted to believe that heredity had a limited role even among humans, and that human characteristics changed by living under socialism would be inherited by subsequent generations of humans. Thus would be created the selfless new Soviet man.
Also Lysenko himself arose from a peasant background and developed his theories from practical applications rather than controlled scientific experiments. This fit the Marxist propaganda of the time holding that brilliant industrial innovations would arise from the working classes through practical applications. Lysenko's theories also seemed to address in a quick and timely manner the widespread Soviet famines of the time arising from the forced collectivization of agriculture, rather than the much slower changes from scientific experimentation and genetic heredity.
Apart from being a bit of a pain generally, the prolonged bout of unseasonably-cold weather has caused severe problems for farmers, prompting a surge in the number of livestock deaths and damaging vast areas of crops.
The average temperature over the period came in at 6.0C, which is 1.8C, or nearly 25 per cent, lower than is typical for the time of year, according to the Met Office.
This makes it the fifth coldest spring since records began in 1910 and the chilliest for 51 years.
A Met Office spokesman said: "The colder than average conditions have been caused by difference patterns at certain times, but generally this season has seen frequent easterly and northerly winds which have brought cold air to the UK from polar and northern European regions."
Rainfall was lower than normal in March and April but May has been wetter than usual, the Met Office added. As a result, spring has been slightly drier than average, but not as dry as the springs of 2010 and 2011.
The Met Office data runs up to the end of March 28, meaning that it does not take into account the final three days of spring.
Top U.S. corn and soybean producing state Iowa has received the most spring rainfall since records began 141 years ago, slowing crop plantings and threatening to reduce yields, an Iowa climatologist said on Friday.
"From March through May, which is our spring record keeping period, Iowa had received 17.48 inches of rain as of Thursday," Iowa State Climatologist, Harry Hillaker said. "There may be another 0.15 inch added to that today."
Hillaker said the old record of 15.36 inches was set in 1892 but rainfall seen from March through to May is the most since records began.
Hillaker said typical March-May rainfall in the state was 10.22 inches. "That would be normal and is based on rainfall received for the past 30 years," he said.
Excessive wet weather in the U.S. Midwest has slowed seedings of corn and soybeans, pushing corn plantings up to the end-of-May deadline that farmers can plant without suffering cutbacks in crop insurance coverage.
Summers began cooling in Northern Europe after 1300 A.D., negatively impacting growing seasons, as reflected in the Great Famine of 1315 to 1317. Expanding glaciers and ice cover spreading across Greenland began driving the Norse settlers out. The last, surviving, written records of the Norse Greenland settlements, which had persisted for centuries, concern a marriage in 1408 A.D. in the church of Hvalsey, today the best preserved Norse ruin.
Colder winters began regularly freezing rivers and canals in Great Britain, the Netherlands and Northern France, with both the Thames in London and the Seine in Paris frozen solid annually. The first River Thames Frost Fair was held in 1607. In 1607-1608, early European settlers in North America reported ice persisting on Lake Superior until June. In January, 1658, a Swedish army marched across the ice to invade Copenhagen. By the end of the 17th century, famines had spread from northern France, across Norway and Sweden, to Finland and Estonia.
Reflecting its global scope, evidence of the Little Ice Age appears in the Southern Hemisphere as well. Sediment cores from Lake Malawi in southern Africa show colder weather from 1570 to 1820. A 3,000 year temperature reconstruction based on varying rates of stalagmite growth in a cave in South Africa also indicates a colder period from 1500 to 1800. A 1997 study comparing West Antarctic ice cores with the results of the Greenland Ice Sheet Project Two (GISP2) indicate a global Little Ice Age affecting the two ice sheets in tandem.
Comment: Indeed, so the question is why are they falsifying data when the climate is changing?
Last Ice Age took just SIX months to arrive
This would occur because this year's long, late winter has cooled the ocean, which, coupled with weak solar activity in recent months, could have a direct effect on the climate.
The last time this happened was in 1816, known as the "year without a summer" or "the year of poverty." At that time the sun was in the midst of the Dalton Minimum, when magnetic activity was extremely low, and Tambora volcano erupted in Indonesia with a column of smoke so thick that it caused a decline in world temperatures.
Comment: Who would have thought indeed!?
Could it be that the ancient (and not so ancient) accounts of environmental upheaval and strange signs in the sky might not be fantasy after all? Interesting that the same thing happened in 2013 AD...
Snow storm: Sheep death toll reaches 20,000 in Northern Ireland