Bulacan's weather is generally warm throughout the year, with temperatures rarely dropping below 20°C. The hottest months are April and May, with average highs reaching up to 38°C, while the coolest month is June with a low of 16°C. The temperature gradually increases from March to May before slowly decreasing again from July to September, with some fluctuations in between. Overall, the province experiences a relatively consistent temperature range throughout the year, with minimal seasonal variations.