Telegraph Online was up by 23% in May to close in on the 5 million mark, while a 16.3% rise in average unique daily browsers netted Trinity Mirror Nationals an extra 610,000.
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In its second consecutive month of decline, MailOnline was down -2.32%, keeping its total audience under 14 million.
While the majority of online news sites saw browsers step outside for some sunshine, the Telegraph, Independent and Metro all recorded healthy boosts to their online audiences.
Most newsbrands recorded declines in February, with Trinity Mirror Nationals dropping 796,000 daily unique browsers.
All ABC-audited national newspaper websites enjoyed an impressive rise in users over January, with dominant newsbrand MailOnline enjoying the most remarkable increase, month on month.
The festive period saw a drop for most news outlets, with just four online news platforms reporting an increase in traffic in December – with Trinity Mirror hit hardest.
November was a relatively strong month for online newsbrands, with just a few reporting declines in average unique daily browsers.
According to data released by measurement company Nielsen, the UK’s online population remained almost static throughout October, witnessing a slight 0.2% increase which brought the total to 38.7 million unique users.
The National Readership Survey (NRS) has today launched its second set of mobile and tablet estimates of audience readership for the period October 2013 to September 2014, alongside its quarterly print and PADD results.
The latest ABC results for online newspapers saw both MailOnline and Independent online break all-time traffic high records.