The earliest end to the rainy season in written history
The earliest recorded end to the rainy season
The Japan Meteorological Agency announced that in the Kanto and Koshin regions, the rainy season ended on June 29th 2018, which is the earliest end to the rainy season on record.
「観測史上最速の梅雨明け」＝ The earliest end to the rainy season in written history / The earliest recorded end to the rainy season
「気象庁が、２０１８年６月29日 関東甲信越地方で 観測史上最速の梅雨明けを宣言した」＝ The Japan Meteorological Agency announced that in the Kanto and Koshin regions, the rainy season ended on June 29th 2018, which is the earliest end to the rainy season on record.
ボキャブラリー
観測史上 ＝ on record, recorded, in written history
梅雨 ＝ the rainy season
最速 ＝ earliest
気象庁 ＝ The Japan Meteorological Agency
宣言した ＝ announced
イギリス 
