Hi , Per the Humira Website Q&A section:
Can I store HUMIRA at room temperature?
If needed, for example when traveling, HUMIRA may be stored at room temperature up to a maximum of 77°F (25°C) for a period of up to 14 days, with protection from light. HUMIRA should be discarded if not used within the 14-day period.
When not traveling, your HUMIRA Pen or prefilled syringe should be stored in a refrigerator at 36°F to 46°F (2°C to 8°C) in its original carton until you are ready to use it.
I've used the Humira travel case and it's fabulous. When I didn't have one available, I ordered a refrigerator thermometer which was super inexpensive online, and used a soft lunch cooler with ice packs to maintain cool temp in low light.