The answer will depend on where on earth you are trying to view it from.
Sagittarius is a summer constellation --- the best time of the year is August to see it at 9pm. Sagittarius is also a Southern constellation: if you're in North America, it can be seen roughly towards the south and will not rise very high on the sky.
Sagittarius the Archer, is right behind Scorpius the Scorpion. both visible in the summer sky - south if you live in the Northern Hemisphere.
SagittariusOphiuchusLibraLupusNormaAraCorona Australis
Sagittarius can be seen in the summer months in the northern hemisphere.
A star chart
Sagittarius is visible in the southern sky and is best seen during the summer months in the Northern Hemisphere. The constellation is located between Scorpius to the west and Capricornus to the east. In the Southern Hemisphere, it appears higher in the sky and can be observed more prominently during winter. Look for the distinctive shape resembling a centaur, which is often depicted as an archer.
Sagittarius is a constellation in the night sky, not a physical object like a star or a planet, so it does not have a surface temperature.
Sagittarius should appear highest in the sky at midnight right around the First of the Year, and it doesn't matter where on Earth you are.
There are more than twenty-two stars in the constellation Sagittarius. Sagittarius is one of the largest constellations in the sky and contains numerous stars of varying brightness and sizes.
Sagittarius is located in the southern sky and is one of the constellations of the zodiac. It is situated between Scorpius to the west and Capricornus to the east. The constellation is often associated with the "Teapot" asterism, which makes it easier to identify. Sagittarius is prominent during the summer months in the Northern Hemisphere and is best viewed in the evening from June to August.
As of September 2008, From the northern hemisphere Jupiter can be seen as a very bright object towards the south in the constellation of Sagittarius. It is best seen in the first few hours after it becomes dark.
The Lagoon Nebula is located in the constellation Sagittarius. It is a prominent emission nebula and can be seen with the naked eye from a dark location.