In what location were the January (°F) temperatures 30/17?
CREATE TABLE "average_daily_maximum_and_minimum_temper" (
  "location" text,
  "july_c" text,
  "july_f" text,
  "january_c" text,
  "january_f" text
);
SELECT "location" FROM "average_daily_maximum_and_minimum_temper" WHERE "january_f"='30/17';