What is the july average low associated with a january average high of 30.4?
CREATE TABLE "averages" (
  "city" text,
  "january_avg_high_f" text,
  "january_avg_low_f" text,
  "july_avg_high_f" real,
  "july_avg_low_f" real
);
SELECT COUNT("july_avg_low_f") FROM "averages" WHERE "january_avg_high_f"='30.4';