Final answer:
Low air pressure and a warm temperature can lead to rain if other conditions, such as high relative humidity, are present. If the temperature drops under these conditions, condensation can occur in the form of heavy dew or fog. Extreme drops in pressure are associated with severe weather events like hurricanes.
Step-by-step explanation:
Whether low air pressure and a temperature of 25°C will lead to rain depends on various weather factors. Low pressure often means that the air is rising, which can cause the temperature to decrease, leading to condensation if the conditions are right. If relative humidity is high, as suggested by your reference where it was 90% on a day with 25°C, a decrease in temperature to 15°C can lead to condensation in the form of heavy dew or fog. In extreme cases, as in the example where atmospheric pressure dropped 15% below average due to a hurricane, such changes in pressure can lead to severe weather, including heavy rainfall.