Spring. Spring in Hisaronu falls between March and May, and is typically warm, sunny, and relatively dry. Hisaronu isn’t likely to be terribly wet during the spring months, with rainfall averages of just 44mm over 14 days in April; the worst of the showers are reserved for winter.Average temperatures of 12C in March rise to a very pleasant 19C by May, with highs of between 17C and 25C throughout the season.pring. Spring in Hisaronu falls between March and May, and is typically warm, sunny, and relatively dry. Hisaronu isn’t likely to be terribly wet during the spring months, with rainfall averages of just 44mm over 14 days in April; the worst of the showers are reserved for winter.