Whatever the temperature, it is good to have workable gloves. Even in the warm South, some people with medical conditions may have problems when the temperature is well above freezing. Cryoglobulinemia, Raynaud's syndrome, Raynaud's-like problems (I have this last, with a single finger with an anomalous vascular supply). I will put in a plug for the traditional kerosene hand warmers and the modern chemical pack hand-warmers. There are also some very expensive gloves with a rechargeable power source and resistive wiring in the insulation (electric blanket for your hand) - I haven't seen these, and they seem a bit fussy, but if I were working in an Arctic winter, I might try them.