01-18-2022, 01:47 PM
You will be fine. We've been using un-fridged nat PB for 10+ years. Slightly warmer climate that you (Mid-atlantic). Never had an issue. Various brands, crunchy, creamy. All the same. At the moment, we finish a jar in about 2 weeks, but sometimes that stretches out a week or two. Absolutely no issue or noticeable loss of quality.