Thick cloud cover and rain areas produced unseasonable cold across inland NSW on Wednesday, with some places seeing their coldest May day on record. While pretty much everywhere in the state was colder than average yesterday, this was especially true for the northwest where some places were up to 10 degrees below average. Collaranebri crept up to just 13 degrees during the 24 hours to 9am today, making Wednesday its coldest May day in 39 years of records. Walgett struggled to just 12 degrees yesterday, its coldest day in almost two years and its coldest May day in at least 18 years. Several other places saw their coldest May days in at least a decade, including Coonabarabran, Moree and Narrabri. Thankfully, the cold came with a reward with some useful rain for farmers, with a widespread 10-20mm across the last two days. Broken Hill has seen 20mm the last couple of days, its heaviest rain since spring and its heaviest May two-day total in eight years. Temperatures should remain below average today across much of the inland, particularly in the far west, although it should not be as cold as yesterday. A cold pool of upper air will cross the region today, producing further cloud and showers. Thunderstorms should also flare up this afternoon across the Upper Western, with some places under storms possibly seeing up to a further 30mm. Due to the cold nature of the air mass, hail is also possible in any storms, although it should be small. A high pressure system will push in from Friday bringing clearer skies, causing maximum temperatures to return close to average, although mornings will become chilly.