Which of the following are considered weather factors influencing fire behavior?

The consideration of weather factors influencing fire behavior is crucial for understanding how fires develop, spread, and can be controlled. The correct answer identifies temperature, wind, relative humidity, and precipitation as key elements.

Temperature directly affects how combustibles ignite and burn, influencing the rate of fire spread. Wind plays a significant role by supplying oxygen to the fire and carrying embers to new locations, which can lead to rapid fire spread. Relative humidity is important because high humidity can dampen combustible materials, decreasing the likelihood of ignition, while low humidity can promote fire spread. Lastly, precipitation, like rain or snow, can directly suppress fires by adding moisture to fuel and reducing combustion potential.

In contrast, while the other choices mention relevant factors, they mix some elements that are not as critical or do not specifically emphasize the relationship between these factors and fire dynamics as clearly as in the correct answer. For example, air pressure variations can have effects on weather patterns but are less directly influential in the immediate behavior of fires compared to the other factors listed in the correct choice.