On average across the year, yes, Missouri is hotter than Maine . Missouri has an average temperature of 14°C/57°F and Maine has an average temperature of 8°C/46°F.
Missouri's hottest month is July, with an average maximum temperature of 32°C/90°F, which is hotter than Maine's hottest month (also July, with an average maximum temperature of 26°C/79°F).
On average across the year, no, Missouri is not colder than Maine . Missouri has an average minimum temperature of 8°C/46°F and Maine has an average minimum temperature of 3°C/37°F.
Missouri's coldest month is January, with an average minimum temperature of -5°C/23°F, which is not colder than Maine's coldest month (also January, with an average minimum temperature of -10°C/14°F).
On average across the year, no, Missouri has less rain than Maine. Missouri has an average annual rainfall of 1122mm and Maine has an average annual rainfall of 1287mm.
Missouri's wettest month is May, with an average monthly rainfall of 142mm, which is wetter than Maine's wettest month (October, with an average monthly rainfall of 139mm).