Oklahoma weather is somewhat unpredictable, but there are four seasons! You can always easily purchase things you need online or in the nearby shopping areas. Here are some recommended items to pack:
Clothing
Other Items
In the US, the electricity voltage is 110v, versus nearly everywhere else that uses 220v. However, most of your major electronics (i.e. laptop, mobile phone, tablet) should already be equipped to handle the power conversion. So a new plug adapter is all you’ll need. These can be found easily in the US online or in stores.
You can double check by looking at the fine print on the “conversion box” with your laptop power cord for example. It will say “100-240v 50-60 Hz” and then you know it will work! Mobile phones won’t have this on them, but typically they also can handle both 110v/220v.
The only electronics that are risky are items like hair dryers, hair straighteners, alarm clocks, etc. But there are inexpensive ones in the US for purchase, so you can leave those at home!