Thailand's headline consumer price index (CPI) rose 0.19% in April from a year earlier, versus a 0.47% year-on-year drop the previous month, the Commerce Ministry said on Friday.
The April figure compared with a fall of 0.25% forecast in a Reuters poll. It was the first time in seven months that inflation was positive.
April's core CPI, which excludes volatile food and energy prices, rose 0.37%.
The rise could be attributed to a low base for electricity prices last year, the rise of agricultural prices, and a weak baht, Trade Policy and Strategy Office director Poonpong Naiyanapakorn told a press conference.
It was however the 12th consecutive month that inflation remained outside the Bank of Thailand's (BoT) target range of 1% to 3%.
Rising global energy prices and prices of agricultural products rose due to a hot climate, Mr Poonpong said.
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The ministry maintained its inflation forecast for the year between 0.0% and 1.0%.
In the first four months ending in April, average CPI dropped 0.55% when compared with the same period a year earlier.
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