Pärnu sää — heinäkuu

July is Tallinn's warmest month and the one regulars name, with summer averages around 20C rising to 30 in a hot spell and visitors reporting 23 to 27 - our row gives 22.7C days over 13.7C nights - though they add that cool weather with rain is not unknown. June and July are the sunniest months, and our row's 13.2 hours of sun under nearly 18 hours of daylight is why their best advice is about timing rather than packing: the long evenings are the nicest part of the day for seeing the Old Town, which is otherwise fairly crowded through July and August. The record: 10.4 precipitation days carrying 69.2mm, humidity 75 percent and an 18.2C sea.

Estonia's forum is realistic about December: subzero temperatures are common but not constant, this is the darkest stretch of the year, and rain is honestly just as likely as snow - a lot of December here means slush rather than a clean white blanket. Wind varies a lot day to day, from calm to blustery, so there's no single pattern to plan around. Pärnu's own beach town character goes fully dormant this time of year, but the coastal chill and short daylight hours are consistent with what the wider Baltic region sees this month.

Forum posters describe June across Estonia as genuinely hit or miss, even around midsummer - a lucky visitor gets blue skies and T-shirt weather, an unlucky one gets sleet, with July generally the more reliably warm month. Posters are consistent that any June rain tends to come as passing showers rather than prolonged, driving rain. Posters specifically flag a real upside for Parnu: the sea here runs 5-7C warmer than in Tallinn through June-August, a meaningful difference for anyone hoping for a swim. Posters generally recommend Parnu as a good base for exploring western Estonia if the weather turns inclement and a car isn't available, given its concentration of things to do compared to more spread-out surrounding areas.