FrostList

When to Store Your Motorcycle in Longmont, CO

ON TRACK86 days until first 32°F freezeOct 5

As freezing nights reach Longmont around October 5, riding gets impractical and it's time to store the motorcycle properly instead of idling it now and then. Riding tends to open again after the last freeze near May 7. The early-to-late range spans roughly 25 days, so treat the median as a midpoint, not a promise.

OUTLOOK

Typical first first 32°F freeze near Oct 5; local deadline about Oct 5. The live 10-day outlook loads here.

Local freeze dates for Longmont

ThresholdEarly (1-in-10)MedianLate (9-in-10)
32°F (light freeze)Sep 23Oct 5Oct 16
28°F (hard freeze)Sep 30Oct 12Oct 25
24°F (severe)Oct 6Oct 21Nov 5

NOAA station: Longmont 2 Ese · 1.3 mi away · 4,950 ft elevation.

Longmont draws its numbers from Longmont 2 Ese, 4,950 feet up and 1.3 miles away. Its median first-freeze dates are 32°F by Oct 5, 28°F by Oct 12, 24°F by Oct 21. The 28°F freeze has come as early as Sep 30 and as late as Oct 25, a 25-day spread. Spring's last 32°F freeze clears around May 7.

Longmont usually sees its first 32°F night about Oct 5, with the first 28°F hard freeze close behind near Oct 12. That first freezing night has ranged from Sep 23 to Oct 16, roughly a 23-day spread. On the spring side, the last 32°F freeze clears around May 7 and as late as May 22 — the green light for reopening water and de-winterizing. With almost no snow in a normal year, cold — not plowing — sets the calendar, and it centers on May 7.

Your motorcycle checklist

  1. Fill the tank and add fuel stabilizer, then ride or idle a few minutes so treated fuel reaches the injectors or carbs.
    Helpful gear: Fuel stabilizer — Recommended pick
  2. Change the oil and filter before storage so acids in used oil do not sit on internal parts all winter.
  3. Put the battery on a tender for the whole layup rather than starting the bike for a few minutes now and then.
    Helpful gear: Battery tender — Recommended pick
  4. Set tire pressure to spec and, if you can, lift the wheels with stands so the tires do not flat-spot.
    Helpful gear: Front paddock stand — Recommended pick
  5. Lube the chain and wipe down bare metal with a light protectant to fend off corrosion.
  6. Plug the exhaust and airbox loosely so mice cannot nest, and set traps nearby as a backup.
  7. Cover the bike with a breathable cover indoors so moisture does not get trapped against the paint.
    Helpful gear: Breathable motorcycle cover — Recommended pick
  8. In spring, remove the plugs, check tire pressure and brakes, and reconnect the battery before the first ride.

What to have on hand

Battery tender
Smart charger that holds the battery through a long layup.
Recommended pick
Fuel stabilizer
Keeps a full tank from varnishing over the winter.
Recommended pick
Breathable motorcycle cover
Indoor cover that keeps dust off without trapping moisture.
Recommended pick
Front paddock stand
Lifts the front wheel so tires do not flat-spot in storage.
Recommended pick

What this means locally

Against its neighbors, Longmont (first freeze Oct 5) runs close to Boulder (Oct 5) and later than Loveland (Oct 1). Across Colorado, local prep deadlines in our data range from Oct 1 to Oct 23, so a statewide rule of thumb would miss Longmont by weeks. In Longmont, that same cold is your cue to test your car battery and winterize a boat.

Other winter jobs in Longmont

Every task below is dated to Longmont's own freeze and snow normals.

Sprinklers → Oct 2Frozen pipes → Sep 23Car battery → Oct 12Sump pump → May 7RV → Oct 2Boat → Oct 5

See the full Longmont winter checklist, in order →

Frequently asked questions

Should I start my motorcycle during winter storage?
It is better not to. Starting the bike for a few minutes does not fully warm the oil or charge the battery, and it leaves moisture and acids inside the engine and exhaust. A battery tender keeps the battery healthy without running the engine, which is the approach most enthusiasts and manuals favor.
Do I store a motorcycle with a full or empty tank?
Store it with a full tank and fuel stabilizer added. A full tank leaves less room for the condensation that causes rust inside the tank, and stabilizer keeps the fuel from breaking down over months of storage. Ride or idle briefly after adding stabilizer so it reaches the fuel system.
How do I keep mice out of my motorcycle?
Loosely plug the exhaust outlets and the airbox intake so mice cannot get inside and nest, and remove the plugs before spring. Set traps or deterrents around the storage area, and avoid leaving food or cardboard nearby. Check periodically through the winter for signs of activity.
Battery tender vs trickle charger?
A modern battery tender, or smart charger, monitors the battery and switches to a maintenance charge when full, so it is safe to leave connected all winter. A basic trickle charger keeps pushing current and can overcharge a battery over time. For long storage, use a tender.
When does riding season end in Longmont?
Riding season here tends to wind down as freezing nights arrive near Oct 5, and reliably cold, dark evenings make regular riding less practical. Watch the live outlook above; a run of sub-45°F nights is a good signal to fuel-stabilize and put the bike on the tender.
How do I prep a motorcycle for spring?
Reconnect the charged battery, check tire pressure and tread, test the brakes, and look for leaks before the first ride. In Longmont the last freeze averages near May 7, a reasonable target for shaking off storage. Clean and lube the chain, and take an easy first ride to re-familiarize yourself.

Data: NOAA 1991–2020 normals via Longmont 2 Ese, live outlook by Open-Meteo. Sources · Methodology. Last updated: July 11, 2026.