Warren has four distinct seasons and most activities are tied to the weather.
Summer (June–August) is the most popular time. The Baker River swimming holes are at their best in July and early August, the hiking on Moosilauke is straightforward, and the roads are open throughout the National Forest. Expect warm days (highs around 27°C/80°F) and cool nights.
Autumn (September–October) brings spectacular foliage across the surrounding hills and along the Baker River valley. Peak color typically arrives in early to mid-October. The Appalachian Trail section over Moosilauke is spectacular at this time of year and sees heavy use from section hikers finishing up their fall mileage.
Winter (December–March) is snowmobile season. Corridor 5 passes through town and connects Warren to a larger network running north toward the Canadian border. Cross-country skiers use the National Forest roads. Temperatures can drop well below freezing and snowfall is heavy — this is not a destination for those unprepared for serious cold.
Spring (April–May) is mud season. Roads deteriorate and the Baker River runs high and fast from snowmelt. The fishing opens in late April, and trout season brings anglers to the river as soon as conditions allow.