There are various ways, but the most concise is
'The warmest March for 10 years.'
Exactly half the number of words as the French version! How's that for economy?
18 de abril de 2015
2
1
0
the warmest March in 10 years or the warmest March in the last 10 years
18 de abril de 2015
1
0
0
The hottest March in the last ten years
18 de abril de 2015
0
0
¿No has encontrado las respuestas?
¡Escribe tus preguntas y deja que los hablantes nativos te ayuden!