The best time to visit Marijampole is during the summer months, from June to August, when the weather is warm and conducive to outdoor activities.
During these months, you can expect average daily temperatures to be around 20-25°C (68-77°F), making it pleasant for exploring the city's parks and outdoor attractions. The longer daylight hours also allow for more extensive sightseeing and enjoyment of events like the Marijampolė City Festival, which typically takes place in July. This period is ideal for couples looking to enjoy strolls along the Šešupė River or visit the Poets' Park.
If you prefer cooler weather and fewer crowds, late spring (May) and early autumn (September) are also good options. These shoulder seasons offer mild temperatures, generally around 15-20°C (59-68°F), and the natural scenery is particularly appealing with blooming flowers or changing leaves.