Snugnight

Tailwater Shelter 2 (brookville Lake)

Brookville, Brookville Lake, Indiana

Tonight: low 48 °F, heavy dew.

Nights by month

Night lows from 2016 to 2025: a typical night, and the cold one that comes 1 night in 10.

The mildest nights are in July, typically 69°F. The coldest are in January, when 1 night in 10 drops to 6°F. Frost is common in January, February, March, April, November and December.

Typical nightCold night (1 in 10)
  1. Jan26°F 6°FBag comfortable to 5°F · frost 79% · rain or snow 33% of days
  2. Feb28°F 14°FBag comfortable to 15°F · frost 69% · rain or snow 36% of days
  3. Mar35°F 24°FBag comfortable to 25°F · frost 42% · rain or snow 39% of days
  4. Apr43°F 31°FBag comfortable to 30°F · frost 13% · rain or snow 41% of days
  5. May56°F 43°FBag comfortable to 45°F · frost 0% · rain or snow 46% of days
  6. Jun64°F 55°FBag comfortable to 55°F · frost 0% · rain or snow 38% of days
  7. Jul69°F 63°FBag comfortable to 65°F · frost 0% · rain or snow 42% of days
  8. Aug67°F 59°FBag comfortable to 60°F · frost 0% · rain or snow 37% of days
  9. Sep61°F 52°FBag comfortable to 55°F · frost 0% · rain or snow 27% of days
  10. Oct49°F 39°FBag comfortable to 40°F · frost 0% · rain or snow 31% of days
  11. Nov36°F 26°FBag comfortable to 25°F · frost 33% · rain or snow 28% of days
  12. Dec29°F 18°FBag comfortable to 20°F · frost 62% · rain or snow 34% of days

| = 32°F

History: ERA5 and ERA5-Land reanalysis via Open-Meteo, corrected to the site's elevation. Bag rating: the comfort rating that keeps you warm in a tent on 9 of 10 nights that month.

Tonight

Good nightFriday, September 25, 10 p.m. to 7 a.m.

Warm enough at the coldest hour

Your selected gear looks warm enough

About 6 °F to spare at the coldest hour.

Change my setupEnter my exact gear ratings

This is based on typical values for the gear types you picked, so treat it as an estimate.

  • Low outside48°F
  • Moistureheavy dew, bring everything inside
  • Windcalm

Your night

  1. 10 p.m. until morningComfortableAir around you 60 to 45°F, heavy dew.
Every hour
  • 10 p.m.56°Fcomfortable, heavy dew
  • 11 p.m.60°Fcomfortable
  • midnight60°Fcomfortable
  • 1 a.m.60°Fcomfortable
  • 2 a.m.59°Fcomfortable
  • 3 a.m.51°Fcomfortable, heavy dew
  • 4 a.m.49°Fcomfortable, heavy dew
  • 5 a.m.47°Fcomfortable, heavy dew
  • 6 a.m.46°Fcomfortable, heavy dew
  • 7 a.m.45°Fcomfortable, heavy dew

This spot sits about 35 m below the land around it. On clear, calm nights cold air pools here, so expect it colder and wetter than the forecast.

Times are local time at your spot (GMT-4).

What works tonight

The gear this night calls for, for someone who sleeps like you.

  • You have this

    Sleeping bag

    Comfort 40°F or colder

    Usually sold as a 31° bag. The number in a bag's name is the limit, not the comfort.

  • You have this

    Underneath you

    R1.5 or more

    The R-value says how well a pad keeps the cold ground out.

Before you sleep

  • Your spot sits lower than the ground around it. On a clear, calm night cold air drains into spots like this, so expect it colder and wetter than the forecast. If you can, move a little higher up, away from the creek or valley floor.
  • Bring shoes, clothes and electronics inside. Anything left out will be wet by morning.
  • Open the tent vents and keep the door zip open a bit at the top. Some condensation inside is normal on a night like this, so bring a small towel to wipe it off.
How we estimated this

At the coldest hour (7 a.m.):

Outside at your spot
48°F
Warmth your shelter holds
+2 °F
Clear-sky cooling
−1 °F
Low spot
−4 °F
Air around you
45°F
Your bag's comfort rating
39°F
Your comfort limit
39°F

6 °F to spare, so warm enough.

Assumptions

  • Bag categories use typical ratings as sold: summer about 50 °F (10 °C), 3-season about 30 °F (-1 °C), winter about 15 °F (-9 °C). The number in a bag's name is usually its lower limit, so its comfort rating is about 9 °F (5 °C) warmer.
  • What you lie on: foam mat about R2, thin air pad about R1.5, insulated pad about R3.5, winter pad R5 and up, van bed about R4, air mattress about R0.5. Colder ground needs a higher R-value.
  • Shelters hold a few degrees early in the night and less towards morning. Wind and clear, calm skies take warmth away.
  • Weather: Open-Meteo forecast for your spot, on a grid of a few kilometers, corrected to its height.
  • These are rules of thumb, not measurements. People and gear vary.

A forecast, not a promise. Mountains, valleys and water make their own weather, so trust what you see and feel on site. Terms and liability

Checked for a double-wall tent, a 3-season bag and a thin air pad. Check your own gear here.

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