For a traditional latte made with cow's milk, the ideal temperature is around 150°F (65°C). This temperature allows the milk to be hot enough to create a comforting and enjoyable drinking experience without scalding the milk or making it taste burnt. When working with alternative milks like oat milk, almond milk, or soy milk, it's generally recommended to aim for a slightly lower temperature range of 140-150°F (60-65°C). Different varieties of milk (and even different brands of the same type of milk) can have different compositions and behaviors when heated, so it may take some experimentation to find the temperature range that works best for the specific milk you're using. If you prefer an iced latte, either room temperature or chilled milk is perfect. It's worth noting that personal preferences for milk temperature can vary. Some folks may prefer a slightly hotter or cooler latte, so feel free to adjust within the suggested range to find your perfect temperature. Using a thermometer can be helpful in achieving consistency, especially as you refine your latte-making skills.