Todmorden is a year-round town, but the appeal shifts significantly with the seasons. Summer (June to August) is the obvious choice for moorland walking and for Gaddings Dam — the outdoor swimming reservoir is at its most inviting in July and August when the water is at its least cold. The market is at its best in summer when local produce is available. Days can be warm in the valley but there is nearly always a breeze on the moors.
Spring and autumn are fine for walking and have the advantage of fewer people on popular routes. The Pennine moorland can be spectacular in late August when the heather is in bloom, and autumn brings colour to the wooded valley sides along the canal. Winter is the honest time to understand the place: the hills are bleak, the light is low, and the town goes about its business with no concessions to tourists. If you want the authentic experience of a working Pennine town, come in February.
The Todmorden Lamplighter Festival, held in November, sees the town illuminated with community-made lanterns and is worth timing a visit around.