Currently, January is the cheapest month in which you can book a flight from Helena to Amsterdam (average of $604). Flying from Helena to Amsterdam in June is currently the most expensive (average of $1,181). 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 Amsterdam ranges from 1.2 - 3.9 inches per month. October is typically the wettest month, when rainfall can reach 3.9 in. April is typically the driest time to visit Amsterdam when rainfall is around 1.2 in.
If weather is an important factor for your trip to Amsterdam, 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 60.8 F. Travelers looking to avoid the cold should look outside of February, when temperatures are typically at their lowest (around 35.6 F).