Currently, July is the cheapest month in which you can book a flight from Harrisburg to South Island (average of $1,101). Flying from Harrisburg to South Island in December is currently the most expensive (average of $1,869). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
In terms of precipitation, rainfall in South Island ranges from 1.6 - 2.4 inches per month. May is typically the wettest month, when rainfall can reach 2.4 in. February is typically the driest time to visit South Island when rainfall is around 1.6 in.
If weather is an important factor for your trip to South Island, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of June, when temperatures are typically at their lowest (around 42.8 F).