has a tropical monsoon climate. There is significant rainfall in most months of the year. The short dry season has little effect on the overall climate. The Köppen-Geiger climate classification is Am. The temperature here averages 27.3 °C. In a year, the average rainfall is 3298 mm. At an average temperature of 29.0 °C, April is the hottest month of the year. July has the lowest average temperature of the year. It is 26.4 °C. Between the driest and wettest months, the difference in precipitation is 574 mm. Precipitation is the lowest in January, with an average of 22 mm. With an average of 596 mm, the most precipitation falls in June. Due to its proximity to the equator, Thiruvalla has very little variation in average temperature. During the year, the average temperatures vary by 2.6 °C. Thiruvalla is known for its pleasant and welcoming weather. South West Monsoon winds bring heavy showers to Thiruvalla in the months of August for a couple of months. The best time to visit this historical town is after the rains as the healthy showers of monsoon leave this place lush green and pristine. History This article is primarily about the history of the settlements in areas of the present city around the temple, known historically as Thiruvalla. For the history of the places in Thiruvalla, also refer History of Niranam, History of Koipuram, History of Kumbanad, History of Kavumbhagom. Ancient period There is plenty of evidence to suggest that the area had been inhabited since 500 BCE, although an organized settlement was only founded around 800 CE. The present-day areas of Niranam, and Kadapra on the western part of Thiruvalla were submerged under the sea before then. It is one of the 64 ancient brahmana graamams. Stone axes have been reported from Thiruvalla, belonging to Neolithic Age. Thiruvalla has many Neolithic remains and got civilized earlier. The Aryan culture presented Thiruvalla as one of the 64 Brahmin settlements of Kerala, and one of the important too. Ptolemy mentions the Baris river, the present "Pamba" river. Thiruvalla was also an important commercial centre with the Niranam port in olden days, which is described by Pliny as "Nelcynda". At this light, the "Bacare" could have been modern "Purakkad". The fact that modern western Thiruvalla contains the coastal kind of sand, and several seashells in the soil despite being landlocked proves that prior to the reclamation