Many of these summability methods easily assign to 1 â 2 + 3 â 4 + ... a sum of 1â4 after all. Cesaro cesÃ ro summation is one of the few methods that do not sum â 1 + 2 â 3 + ... 4
However, despite this fine climate, many people prefer to visit Tallinn during April or May, when the fresh, spring weather is especially enticing. April features average daytime temperatures of 9Â°C / 48Â°F, with highs of more than 15Â°C / 59Â°F when May arrives.
There are more than 1,400 natural and artificial lakes in Estonia. The largest of them, Lake Peipsi (3,555 square kilometers), forms much of the border between Estonia and Russia. Located in central Estonia, Vrtsjrv is the second-largest lake (270 square kilometers). The Narva and Emajgi are among the most important of the country's many rivers. Estonia has a temperate climate, with four seasons of near-equal length. Average temperatures range from 16.3C on the Baltic islands to 17.1C inland in July, the warmest month, and from -3.5C on the Baltic islands to -7.6C inland in February, the coldest month.