If global warming is real and weather will change, it's possible that some shifts. Cold places will become warmer.
It's also important to think about predictability. Issue with many lands is unpredictable weather. You put your grains in the soil, month later you've got -2C and grains are dead. I feel that global warming will not help here, but rather will make things worse: weather will be less predictable, even if average temperature goes up, local extremums will occur often.
It's also important to think about predictability. Issue with many lands is unpredictable weather. You put your grains in the soil, month later you've got -2C and grains are dead. I feel that global warming will not help here, but rather will make things worse: weather will be less predictable, even if average temperature goes up, local extremums will occur often.