It may be the third last day of winter in Australia but spring still feels a long way off in southern NSW, where Griffith just had its coldest pair of mornings in half a century. A pool of cold air that produced low-level snow in southeastern Australia on Sunday has helped bring widespread frost to the state's inland districts during the last couple of nights. Forbes dropped to minus 4.9 degrees this morning for the first time during August in 18 years. Further south, Griffith's minus 4.5 degrees this morning and minus 4.8 degrees early on Monday were the town's coldest pair of minimums in more than 50 years of records. Frost will redevelop over inland NSW each night until Friday as a high pressure ridge drifts over the state. While temperatures won't be as low as the last two nights, it will be cold enough to ensure a frosty end to winter for many locations on and west of the ranges. The start of spring will be a notable contrast to winter's chilly end as warmer northwesterly winds filter into the state this weekend ahead of an approaching front. Frost will be a thing of the past by Saturday morning and daytime maximum temperatures are forecast to climb 5-7 degrees above average in some areas on Saturday and Sunday. This weekend's warm and windy weather is likely to elevate fire danger ratings in NSW so be sure to keep up to date with the latest advisories from emergency services.