Letsrun marathon preview says "the hot weather of the Olympic marathon means there is usually at least one surprise on the podium."
Forecast doesn't seem so bad - sunny, little wind, upper 60s warming to low 70s, but with high humidity around 80% dropping to 60% by expected finish. Not bad versus recent Olympics. So the weather will not be a factor?
Tebello Ramakongoana will win gold. He was 4th in Budapest and has completely flown under the radar. This course suits him very well. You heard it here first.