The bow you tuned in July is not the same bow you're hunting in November. The materials change. The math changes. Your sight tape lies.
If you're hunting late season and not compensating, you're missing high or low and blaming the wind.
What Cold Actually Does
Three things change when temperature drops:
- Bowstring tension increases. The string contracts as it cools. This shortens it slightly, which raises peak draw weight and changes brace height. A bow tuned at 65 lb at 75 degrees might be 67 lb at 25 degrees.
- Carbon shaft stiffness increases. Carbon is more rigid in cold. Dynamic spine reads slightly stiffer. The effect is small but real on the edge of tune.
- Release aid fluid thickens. Hydraulic releases (Carter HBC, Stan PerfeX SX3) slow down their break. Mechanical releases (any thumb or hinge) get notchier.
Each effect alone is small. Stacked, they shift point of impact by several inches at 50-60 yards.
How Much Higher Your Arrow Hits
Roughly: every 30 degrees of temperature drop, your arrow hits 1-2 inches higher at 50 yards.
This is mostly driven by the increase in peak draw weight (more energy, more velocity) and slightly by the air density change (denser air = slightly more drop, partially canceling the velocity gain).
If your sight tape is built at 75 degrees and you're hunting at 25 degrees, expect 1.5-2 inches high at 50 yards. At 60 yards it's 3 inches. At 70 yards it's 4-5 inches.
This is not theoretical. Bring a target on a cold morning and shoot your 60 yard pin. You'll see it.
What to Do About It
The honest fix: build a separate sight tape for cold weather.
Mark the tape with a 25-degree set of marks alongside your 75-degree set. Use the cold marks November through February. Switch back when ambient gets above 50.
Or: use a slider sight (Black Gold Ascent Verdict, Spot Hogg Fast Eddie, IQ Define) and learn your cold-weather offsets. At 50 yards in cold, dial 1 inch lower than your warm setting.
The Forge auto-generates temperature-compensated sight tapes. You enter your setup, current temperature, and target temperature. It returns updated yardage marks. This is the single biggest reason competitive archers shooting in fluctuating conditions adopted Forge.
String Care in Cold
Wax your string before every cold hunt. Cold strips wax fast. A dry string in cold weather is loud, prone to fraying, and stretches faster than a waxed one.
Use a real string wax (BCY-X, Tex-Tite). Skip the home recipes. Skip the basic Bohning wax — it's fine for storage but doesn't lubricate the string strands the way premium waxes do.
Release Aid in Cold
If you shoot hydraulic, leave the release in your jacket pocket until you draw. Body heat keeps the fluid moving. A cold release breaks differently than a warm one. Practice with it cold if you can.
Mechanical thumb releases (Scott Mongoose, Stan Element Stainless) are more cold-tolerant than hydraulics. If you hunt in true cold (below 0), mechanical is the play.
Hinge releases (Stan PerfeX, Carter Hinge) are also reliable in cold but the click can feel different — sharper, faster. Don't be surprised.
Arrow Behavior in Cold
Carbon shafts get marginally stiffer. If your bareshafts read perfectly tuned in warm weather, they may read slightly stiff in cold (bareshafts impact slightly right for a RH shooter).
The effect is small. Don't re-tune for cold. Just know that a marginally weak setup tunes itself a touch tighter when the temperature drops.
Vanes also get stiffer. Plastic vanes (Bohning Blazers, AAE Max Stealth) keep their shape. Soft vanes (some QuikSpin variants) get rigid and steer the arrow slightly differently. Most modern vanes are fine. Don't change vanes for winter.
Cam and Cable Behavior
Modern bow strings (BCY 8190, BCY-X) are stable in temperature. They stretch maybe 1/32 over the course of a month in cold storage. Your peep rotation may shift slightly. Check it before each cold hunt.
Cable wear accelerates in cold because the lubrication is gone. Inspect cables before season. Replace if you see fraying or serving wear.
The Hunter's Routine
- Build a cold-weather sight tape. Test it on a target before you trust it on game.
- Wax the string. Often.
- Bring the release into a warm pocket between sits.
- Confirm zero on the first morning of a hunt. Five arrows at 30 yards tells you where the bow is shooting today.
The Mistake Everyone Makes
They sight in at the range in October, then go hunt in November and don't re-confirm. Then they miss high at 45 yards on a buck and blame nerves. They probably weren't nervous. They were probably 2 inches above target because their tape is from warmer air.
Shoot before the hunt. Always. Every season opener, every cold front. Five arrows at distance to confirm point of impact. Adjust the pin or the tape. Then hunt.
The Long View
Cold makes everything harder. Bow, arrow, release, your hands, your eye relief on the peep. Don't fight the weather. Compensate for it. Your tuned-in-summer bow becomes a different rig in winter. Treat it that way.