court_astrologer_task_add_seasonal_modifiers_effect

court_astrologer_task_add_seasonal_modifiers_effect = {
	hidden_effect = {
		save_scope_as = current_character
		capital_province.county = {
			random_county_situation_sub_region = {
				limit = {
					situation_sub_region_has_county = prev
				}
				switch = {
					trigger = sub_region_current_phase
					situation_steppe_abundant_grazing_season = {
						scope:current_character = {
							add_character_modifier = court_astrologer_abundant_grazing_modifier
						}
					}
					situation_steppe_warm_nights_season = {
						scope:current_character = {
							add_character_modifier = court_astrologer_warm_nights_modifier
						}
					}
					situation_steppe_sky_blessing_season = {
						scope:current_character = {
							add_character_modifier = court_astrologer_sky_blessing_modifier
						}
					}
					situation_steppe_white_zud_season = {
						scope:current_character = {
							add_character_modifier = court_astrologer_white_zud_modifier
						}
					}
					situation_steppe_cold_zud_season = {
						scope:current_character = {
							add_character_modifier = court_astrologer_cold_zud_modifier
						}
					}
					situation_steppe_severe_drought_season = {
						scope:current_character = {
							add_character_modifier = court_astrologer_severe_drought_modifier
						}
					}
					situation_steppe_havsarsan_zud_season = {
						scope:current_character = {
							add_character_modifier = court_astrologer_havsarsan_zud_modifier
						}
					}
				}
			}
		}
	}
}

As written in game/common/scripted_effects/00_court_position_effects.txt.