In terms of precipitation, rainfall in Lille ranges from 40.0 - 60.0 mm per month. July is typically the wettest month, when rainfall can reach 60.0 mm. January is typically the driest time to visit Lille when rainfall is around 40.0 mm.
If weather is an important factor for your trip to Lille, 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 19.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).
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