San Juan is a city located in San Juan County, Bloxburg Valley, on the border with Bloxico in the Southern Bloxburg Valley, approximately 190 kilometers north of Bloxburg City.

With an estimated population of 4.0 million as of 2022, San Juan is the tenth largest city in Robloxia (country) and the third largest in the State of Bloxburg Valley. Part of the San Juan-Mission Valley conurbation, the second largest urban agglomeration between Robloxia and the ocean, San Juan has been called "the birthplace of the Bloxburg Valley". It is known for its stable and warm year-round climate, natural deep-water harbors, long beaches, long cooperation with the Robloxia Navy, and recent growth in the health and biotechnology industry. On December 23rd, 1999, the city was destroyed, and was rebuilt in 2001.

San Juan was proposed to become Robloxia's next capital.

Climate Data for San Juan, Bloxburg Valley. F(C)
January February March April May June July August September October November December
Record Highs 101(38) 103(39) 110(43) 117(47) 119(48) 113(45) 120(49) 106(41) 110(43) 107(42) 110(43) 98(37)
Highs 60(16) 66(19) 72(22) 78(26) 83(28) 89(32) 95(35) 89(32) 83(28) 78(26) 72(22) 66(19)
Averages 38(3) 46(8) 53(12) 61(16) 68(20) 76(24) 84(29) 76(24) 68(20) 61(16) 53(12) 46(8)
Lows 15(-9) 25(-4) 34(1) 44(7) 53(12) 63(17) 72(22) 63(17) 53(12) 44(7) 34(1) 25(-4)
Record Lows -20(-29) 1(-17) 14(-10) 21(-6) 32(0) 49(9) 63(17) 51(11) 38(3) 24(-4) 8(-13) 1(-17)