Trail River Cabin
Tonight: low 42 °F, heavy dew, rain likely, strong gusts.
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 53°F. The coldest are in December, when 1 night in 10 drops to -2°F. Frost is common in January, February, March, April, October, November and December.
- Jan22°F -4°FBag comfortable to -5°F · frost 85% · rain or snow 56% of days
- Feb19°F 3°FBag comfortable to 5°F · frost 93% · rain or snow 52% of days
- Mar24°F 6°FBag comfortable to 5°F · frost 84% · rain or snow 47% of days
- Apr32°F 21°FBag comfortable to 20°F · frost 53% · rain or snow 50% of days
- May37°F 33°FBag comfortable to 35°F · frost 8% · rain or snow 53% of days
- Jun48°F 39°FBag comfortable to 40°F · frost 0% · rain or snow 55% of days
- Jul53°F 48°FBag comfortable to 50°F · frost 0% · rain or snow 49% of days
- Aug52°F 48°FBag comfortable to 50°F · frost 0% · rain or snow 55% of days
- Sep (this month)45°F 38°FBag comfortable to 40°F · frost 2% · rain or snow 62% of days
- Oct34°F 22°FBag comfortable to 20°F · frost 38% · rain or snow 57% of days
- Nov23°F 3°FBag comfortable to 5°F · frost 79% · rain or snow 54% of days
- Dec19°F -2°FBag comfortable to 0°F · frost 90% · rain or snow 59% 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.
Your selected gear looks warm enough
About 6 °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.
Your night
- 10 p.m. until morningComfortableAir around you 49 to 45°F, heavy dew from 3 a.m., strong gusts from 3 a.m., rain likely (up to 40 mph).
Every hour
- 10 p.m.49°Fcomfortable, some dew, gusty, rain likely
- 11 p.m.49°Fcomfortable, some dew, gusty, rain likely
- midnight49°Fcomfortable, some dew, gusty, rain likely
- 1 a.m.48°Fcomfortable, some dew, gusty, rain likely
- 2 a.m.47°Fcomfortable, some dew, gusty, rain likely
- 3 a.m.45°Fcomfortable, heavy dew, strong gusts, rain likely
- 4 a.m.45°Fcomfortable, heavy dew, gusty, rain likely
- 5 a.m.45°Fcomfortable, some dew, gusty, rain likely
- 6 a.m.45°Fcomfortable, some dew, rain likely
- 7 a.m.45°Fcomfortable, heavy dew, rain likely
Times are local time at your spot (GMT-8).
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
- Stake out every guyline and point the low, narrow end of the tent into the wind.
- Gusts get strong during the night. Do not pitch or park under dead trees or big dead branches.
- Rain is possible from about 10 p.m. Keep the rain fly on and bring shoes and packs inside.
- 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 (4 a.m.):
- Outside at your spot
- 42°F
- Warmth your shelter holds
- +3 °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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