Twitter use worldwide has continued to climb in 2010, showing no signs of trend fatigue yet.

The social media site received almost 93 million visitors worldwide in June 2010, a whopping 109% increase over the same time last year.

In North America – where, the report noted, Twitter is a more mature medium – the increase wasn’t quite as dramatic, rising 22% in unique visitors year-over-year, from 20.4 million in 2009 to 24.9 million in 2010. The world leader was Latin America, where UMVs to the site surged 305% from 3.8 million in June 2009 to 15.3 million in June 2010. The report noted that Twitter can thank its blockbuster rise in popularity to Venezuelan president Hugo Chavez, who started tweeting in April 2010.

Canada ranked seventh worldwide in Twitter reach amongst its population, with 13.5% of Canadians sharing their pithy thoughts with their followers, while the US ranked #11 with 11.9% reach. Worldwide, percentage reach was 7.4 (adults 15+, from home or work, ComScore Media Metrix).

Although Twitter adoption has levelled out somewhat from its rapid rise to ubiquity in North America, mobile access of the site is on the upswing, with 4.2 million Americans (or 8.3%) logging in via mobile in June. In March, ComScore reported that mobile access to Twitter had surged 347% from January 2009 to January 2010. Figures for Canada were not available.

Figures were based on visits directly to Twitter.com and did not take into account access via Tweetdeck or other software.