Five Day Forecast

Time is given in GMT which is Greenwich Mean Time NOT your local time.

You need to calculate how far you are from GMT. I my case I am in Mountain Time Zone whoch is 6 hours ahead of GMT so if I look at the dt_txt value in the JSPN data and subtract 6 hours, it should be close to my local time. Remember that these are rounded to the nearest 3 hours.

So if I wanted the local wather at noon, I would have to add the time offset in my case 6 hours and I would be looking for weather around 1800.

Read How to add a degree mark to html using javascript.