April in Calumpit averages a daily high of 34.4°C with nights around 23.9°C. Expect roughly 5.8 wet days totalling 48.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Calumpit is January–February.
Based on SCIENCE GARDEN, RP (41.5km), 1995–2024. 27 years of April data.