In terms of precipitation, rainfall in Barter Island ranges from 0.0 - 0.8 inches per month. July is typically the wettest month, when rainfall can reach 0.8 in. February is typically the driest time to visit Barter Island when rainfall is around 0.0 in.
If weather is an important factor for your trip to Barter Island, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 39.2 F. Travelers looking to avoid the cold should look outside of February, when temperatures are typically at their lowest (around -18.4 F).