The consumer price index, driven by cheaper electricity, heat energy and fuel, was down 0.6 percent compared to September 2013, said Statistics Estonia.
The government agency said electricity that arrived at homes was 7.6 percent cheaper and heat energy was 4.1 percent less in a month-on-month comparison for September. Automobile fuel has dropped 4.5 percent.
Alcoholic beverages rose 1.8 percent and tobacco was 7.2 percent more expensive than September 2013. In food products, the price of conserved milk increased the most (18 percent) and the prices of sugar and apples have decreased the most (39 percent and 30 percent, respectively).
Goods were 0.3 percent cheaper and services cost 1.0 percent less in the year-on-year comparison.
The regulated prices of goods and services has fallen by 1.1 percent and non-regulated prices by 0.4 percent compared to September of the previous year.
In a monthly comparison from August to September, the consumer price index dropped 0.2 percent. The big influencers were the end of sales of clothing and footwear, a 2.1 percent price increase of electricity and a 12 percent drop in plane ticket prices.
Compared to August, the prices of tomatoes increased the most (98 percent) and the prices of potatoes decreased the most (23 percent).