Ferndale experiences a warm-summer Mediterranean climate (Köppen: *Csb*), typical of the Pacific Northwest.
**Temperatures:** Winters are generally mild and damp, with average high temperatures in the 40s (°F) and lows in the 30s. Summers are comfortable, warm, and relatively dry, with average highs in the 70s (°F), rarely exceeding 90°F.
**Precipitation:** The city receives an average of 35 to 40 inches of rain annually. Rainfall is heaviest from October through April. Snowfall is occasional and typically light, averaging a few inches per year, though heavy snow events can happen.
**Natural Disasters:** The most common natural hazard is river flooding. The Nooksack River periodically overflows its banks during heavy winter rain events, particularly when combined with snowmelt from the Cascades (often referred to as "Pineapple Express" or atmospheric river events).
**Best Time to Visit:** July through September offers the most pleasant weather, with clear skies, low humidity, and comfortable temperatures ideal for outdoor recreation and exploring the region.