How to draw geographical temperature curve

There are standards in geography class. Isotherm-Draw a circle in the area with the same temperature, draw different lines for different temperatures to mark the temperature, and mark the latitude on the map. Temperature curve (isotherm distribution)

(1) If the temperature in this area is lower than that in the same latitude area, the isotherm will protrude to the lower latitude (including indicating that there is a cold current passing through the higher land in winter or an ocean in summer).

(2) If the temperature in this area is higher than that in the same latitude area, the isotherm protrudes to the high latitude (which also means that there is a warm current passing through the low-lying land in summer or a warm current passing through the ocean in winter).

(3) If the sea surface temperature is high and the isotherm is straight, it means that the underlying surface is single (for example, the isotherm of 400-600 in the southern hemisphere is flat, which means that the sea area in this area is large and uniform).

(4) If a warm center or a cold center is formed under the influence of topography, the isotherm is a closed curve.

If you are asking about a simple climate temperature curve, you can refer to the temperature trend chart of the meteorological observatory network. As shown in the figure below-

(Screenshot from Weather Network, for reference only)