How long will a homemade sandwich be good for on hot day?

It depends on the ingredients used and the storage conditions, but as a general rule of thumb, a homemade sandwich will be good for about 2 hours at room temperature. After this time, the bread will start to dry out and the fillings may become unsafe to eat. If the temperature is above 90 degrees Fahrenheit, the sandwich will likely only be good for about an hour.

To keep your sandwich fresh for longer, you can pack it in an insulated lunch bag with an ice pack. This will help to keep the sandwich cool and prevent it from spoiling. You can also make a sandwich ahead of time and store it in the refrigerator; this will keep it fresh for up to 3 days.

When packing a sandwich for a hot day, it's important to choose fillings that will hold up well. Avoid using mayonnaise or other creamy spreads, as these can spoil quickly. Instead, opt for dry fillings like peanut butter, jelly, or cheese. You can also add some vegetables or fruit for extra flavor and nutrition.

If you're planning to eat your sandwich outdoors, be sure to find a shady spot to avoid direct sunlight. This will help to keep the sandwich from getting too warm.