Hatch Window › Hatch chart › January

What hatches in January: flies and patterns

2 entries in the Hatch Window curated chart are typically active in January, with the fly patterns that match each.

By water type

Hatches and matching patterns

Midges

Chironomidae
Typical months: January to December. Water types: Tailwater, Freestone, Spring creek. Regions: Mountain West; Northeast (Catskills/Appalachians); Midwest (Driftless/Great Lakes); South (Southern Appalachians/Southeast tailwaters).

Year-round on tailwaters, most reliable hatch on cold winter days when little else is moving.

Scuds & Sowbugs

Gammarus / Asellus spp.
Typical months: January to December. Water types: Tailwater, Spring creek. Regions: Mountain West; Northeast (Catskills/Appalachians); Midwest (Driftless/Great Lakes); South (Southern Appalachians/Southeast tailwaters).

Not a hatch, a year-round staple on cold, stable tailwaters and spring creeks (the South Holston and Clinch in Tennessee, the Bighorn and San Juan out West, Pennsylvania limestoners, the Driftless Area) where crustaceans outnumber insects.

Browse the neighbouring months: December · February · all months.

Check local regulations. Seasons, gear rules, closures and access vary by water and change often. Check current regulations and conditions for the water you plan to fish, and carry a valid license.
About this page. Hatch timing varies by year, elevation and water temperature. Months here are typical ranges from the Hatch Window curated chart, a starting point and not a live report of what is hatching today. Hatch Window is a free fly-fishing companion app from Baker Ventures LLC with a built-in version of this chart, plus streamflow from USGS and weather from Open-Meteo. Data source: Hatch Window source files src/data/hatches.ts and src/data/spots.ts, commit c45001f.