Tolkan Campground

Whitethorn, CA 95589, California

Tonight: low 54 °F, breezy.

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 August, typically 58°F. The coldest are in March, when 1 night in 10 drops to 35°F. Frost is rare all year.

Typical nightCold night (1 in 10)
  1. Jan41°F 35°FBag comfortable to 35°F · frost 2% · rain or snow 53% of days
  2. Feb40°F 33°FBag comfortable to 35°F · frost 9% · rain or snow 40% of days
  3. Mar40°F 35°FBag comfortable to 35°F · frost 3% · rain or snow 48% of days
  4. Apr44°F 38°FBag comfortable to 40°F · frost 0% · rain or snow 28% of days
  5. May48°F 43°FBag comfortable to 45°F · frost 0% · rain or snow 14% of days
  6. Jun53°F 48°FBag comfortable to 50°F · frost 0% · rain or snow 5% of days
  7. Jul57°F 53°FBag comfortable to 55°F · frost 0% · rain or snow 1% of days
  8. Aug58°F 54°FBag comfortable to 55°F · frost 0% · rain or snow 1% of days
  9. Sep (this month)55°F 51°FBag comfortable to 50°F · frost 0% · rain or snow 11% of days
  10. Oct51°F 45°FBag comfortable to 45°F · frost 0% · rain or snow 22% of days
  11. Nov44°F 38°FBag comfortable to 40°F · frost 1% · rain or snow 36% of days
  12. Dec41°F 36°FBag comfortable to 35°F · frost 0% · rain or snow 41% 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

Worth a lookFriday, September 25, 10 p.m. to 7 a.m.

Warm enough at the coldest hour

Your selected gear looks warm enough

About 20 °F to spare at the coldest hour.

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

  • Low outside54°F
  • Moisturedry
  • Windgusty at times

Your night

  1. 10 p.m. until morningComfortableAir around you 60 to 59°F, gusty (up to 32 mph).
Every hour
  • 10 p.m.59°Fcomfortable, gusty
  • 11 p.m.59°Fcomfortable, gusty
  • midnight59°Fcomfortable, gusty
  • 1 a.m.59°Fcomfortable, gusty
  • 2 a.m.60°Fcomfortable
  • 3 a.m.60°Fcomfortable
  • 4 a.m.60°Fcomfortable
  • 5 a.m.60°Fcomfortable
  • 6 a.m.60°Fcomfortable
  • 7 a.m.60°Fcomfortable

Times are local time at your spot (GMT-7).

What works tonight

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

  • You have this

    Sleeping bag

    Comfort 55°F or colder

    Usually sold as a 46° bag. The number in a bag's name is the limit, not the comfort.

  • You have this

    Underneath you

    R1 or more

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

Before you sleep

  • Stake out every guyline and point the low, narrow end of the tent into the wind.
How we estimated this

At the coldest hour (midnight):

Outside at your spot
54°F
Warmth your shelter holds
+4 °F
Air around you
58°F
Your bag's comfort rating
39°F
Your comfort limit
39°F

19 °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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