Seasons

Tempax clearly displays distinct seasons one might be familiar with: In spring the thaws and rains swell rivers, green growing things bloom on land and under the waves of the seas, and most non-plant races also enter their highest periods of breeding activity; The summers bring less rainfall, fewer clouds, and higher temperatures, drying the land and warming the surface of the ocean to provoke sparkling plankton lights in waves to mimic the stars above; Autumn winds blow with a frenzy, seeming to push the summer weather away by main force and whipping up the strongest storms of the year, on land and sea; Winter calms the winds somewhat, as if tiring from so much effort, and the world quiets, plant and animal alike retreating to burrow, bark, or ocean depths.
Where visitors would rightfully be surprised first is in the timing of these seasons. The Calendar of Modern Timekeeping, agreed upon at The Meeting of Equals, labels the ten months of the year by the seasons because they follow this time frame with only a slight variation. A traveler can reliably assume that even the heaviest of roads will be clear of snow by the Second First-day of First Spring, and that their primary concern should instead be flooding from the spring melt. It isn't unusual for the Fourth Ten-day of Second Autumn to be spent in final celebrations and preparation for the winter snows likely to begin falling within the next several days.
The second surprise for visitors to this world will likely be in the geographical disbursement of weather. To state it plainly: there effectively is none. True, the Spirited Lands receive more fog on their southern coasts than other areas, in any season, and other areas have similar weather occurences specific to them, but nearly everywhere in Tempax sees snow during winter. There is no gradation from any meridian outward; variations in the intensity of weather instead align along the average behavior for a specific area. The Sand Fields of the northern continent may only see an inch or so for ten minutes on their western expanse, but even they receive a burst of snow during the depths of winter, and a moment or two of rain as spring begins in earnest. The sole areas that break from the cycle are the highest mountain ranges, which see irregular snowfall year-round.
If questioned, scholars of natural sciences will advise you that this is accepted to not be natural, but that they cannot provide a reasoned explanation for it. Mountains should block naturally-occuring high-altitude wind patterns and redirect them, and the ocean currents should create significant variations in the timing and direction of storms. They simply don't.