Santiago Seasonal temperature break down - The average median temperature March through May is approximately 59°F with highs averaging at 76°F and lows averaging at 47°F. June through August has an approximate average median temperature of 49°F with highs averaging at 65°F, lows typically average at 38°F. Average median temperatures September through November average out at 61°F, high temperatures average out at 78°F and lows average at 47°F.
The average median temperature December through February is approximately 71°F with highs averaging at 89°F, lows average out at 55°F.
The average Santiago annual median temperature averages out at approximately 60°F. The coldest month in Santiago is June with a median temperature of 47°F, the average high for the month of June is 62°F with an average low of 38°F. The hottest month in Santiago is December with an approximate median temperature of 72°F, the average high for the month of December is 89°F with an average low of 54°F.