Like the south-east of the peninsular, Jumilla is an area which is subject to a complex climate with notable harsh contrasts
The main climatic factors that make up the weather in Jumilla are directly influenced by the Azores High, its proximity to North Africa and the Mediterranean Sea and the effect of the North Atlantic Polar Front.
The shortage of rainfall throughout the year is its main characteristic, being particularly scarce during summer. There is a gradient in which the continental features go from higher to lower in the direction from north to south, and north-west to south-east. The effect of these continental features is accentuated by the layout of the orographic barriers which affect the penetration of the mild winds coming from the Mediterranean coast. It has a dry microclimate with many days of wind and sun.
There are many sharp changes in temperature, which goes between the highest (summer, up to 45° C) and the lowest (winter, down to -5° C). This drop in temperature is also brusque between day and night. In summer, there can be temperature differences of up to 20° C. The variations in altitude, latitude, the leeward or windward exposure of the mountain ranges, vegetation and so forth are factors which cause variations in the different areas of the municipality.