for epi_week in weekly_weather[epi_year]:
if count_years > 1:
if 1 <= epi_week <= 9:
seasonal_weather[epi_year]["winter"]["degree_week_average_c"] += weekly_weather[epi_year-1][epi_week]["degree_week_c"]
seasonal_weather[epi_year]["winter"]["precip_week_average_cm"] += weekly_weather[epi_year-1][epi_week]["precip_cm"]
if 49 <= epi_week <= 52:
seasonal_weather[epi_year]["winter"]["degree_week_average_c"] += weekly_weather[epi_year][epi_week]["degree_week_c"]
seasonal_weather[epi_year]["winter"]["precip_week_average_cm"] += weekly_weather[epi_year][epi_week]["precip_cm"]
if 23 <= epi_week <= 35:
seasonal_weather[epi_year]["summer"]["degree_week_average_c"] += weekly_weather[epi_year][epi_week]["degree_week_c"]
seasonal_weather[epi_year]["summer"]["precip_week_average_cm"] += weekly_weather[epi_year][epi_week]["precip_cm"]
if 10 <= epi_week <= 22:
seasonal_weather[epi_year]["spring"]["degree_week_average_c"] += weekly_weather[epi_year][epi_week]["degree_week_c"]
seasonal_weather[epi_year]["spring"]["precip_week_average_cm"] += weekly_weather[epi_year][epi_week]["precip_cm"]
if 36 <= epi_week <= 48:
seasonal_weather[epi_year]["fall"]["degree_week_average_c"] += weekly_weather[epi_year][epi_week]["degree_week_c"]
seasonal_weather[epi_year]["fall"]["precip_week_average_cm"] += weekly_weather[epi_year][epi_week]["precip_cm"] |