Due to difference in the date of first operation for various regional automatic weather stations, the periods for computing climatological normals for different regions are not identical.

Please click the mouse on the region of your choice to see detailed climatological information and periods for computing climatological normals.

Criteria of very hot day: daily maximum temperature higher than or equal to 33.0 degrees C

Criteria of hot night: daily minimum temperature higher than or equal to 28.0 degrees C

Criteria of cold day: daily minimum temperature lower than or equal to 12.0 degrees C