Just out of sheer boredom... these are all rough estimates taking into account the fact that characters are unlikely to be fat based on the time period, as well as that muscle mass weighs more than fat and as adventurers we're bound to have more muscle and less fat.

Hyur (Male Midlander): 160 - 180 lb.
Hyur (Female Midlander): 130 - 150 lb.
Hyur (Male Highlander): 170 - 200 lb.
Hyur (Female Highlander): 140 - 160 lb.

Miqo'te (Male): 150 - 175 lb.
Miqo'te (Female): 125 - 150 lb.

Elezen (Male): 145 - 170 lb.
Elezen (Female): 135 - 160 lb.

Lalafell: 35 - 50 lb.
(There's no real difference between male and female Lalafell physiques...)

Roegadyn (Male): 250 - 300 lb.
Roegadyn (Female): 175 - 225 lb.

Au Ra (Male): 185 - 210 lb.
Au Ra (Female): 115 - 135 lb.

... again, just rough estimates. (An' I'm too lazy to translate them into kgs, so if you want those do it yerself.)