Alsek River Cabin
Tonight: low 32 °F, some dew, rain likely, 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 July, typically 52°F. The coldest are in February, when 1 night in 10 drops to 12°F. Frost is common in January, February, March, April, May, October, November and December.
- Jan25°F 10°FBag comfortable to 10°F · frost 76% · rain or snow 64% of days
- Feb24°F 12°FBag comfortable to 10°F · frost 87% · rain or snow 59% of days
- Mar27°F 15°FBag comfortable to 15°F · frost 80% · rain or snow 53% of days
- Apr33°F 25°FBag comfortable to 25°F · frost 44% · rain or snow 59% of days
- May38°F 32°FBag comfortable to 35°F · frost 10% · rain or snow 56% of days
- Jun47°F 41°FBag comfortable to 40°F · frost 0% · rain or snow 53% of days
- Jul52°F 47°FBag comfortable to 50°F · frost 0% · rain or snow 51% of days
- Aug52°F 47°FBag comfortable to 50°F · frost 0% · rain or snow 65% of days
- Sep47°F 40°FBag comfortable to 40°F · frost 0% · rain or snow 68% of days
- Oct37°F 29°FBag comfortable to 30°F · frost 24% · rain or snow 67% of days
- Nov (this month)28°F 16°FBag comfortable to 15°F · frost 67% · rain or snow 69% of days
- Dec25°F 7°FBag comfortable to 5°F · frost 76% · rain or snow 70% 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 lookMonday, November 9, 10 p.m. to 7 a.m.
Your setup looks too cold for this night
Expected from around 1 a.m.
Your sleeping bag is not warm enough for this night.
Best change
Sleep in a warm layer, a hat and dry socks, and take a hot water bottle.
This is based on typical values for the gear types you picked, so treat it as an estimate.
Your night
- 10 p.m. to 1 a.m.ComfortableAir around you 45 to 44°F, some dew from midnight, gusty from 11 p.m., rain likely (up to 28 mph).
- 1 a.m. to 7 a.m.Chilly. Add a layerAir around you 40 to 35°F, rain likely.
- 7 a.m. until morningCold. Your setup is not warm enoughAir around you 34°F, some dew, chance of rain.
Every hour
- 10 p.m.44°Fcomfortable, rain likely
- 11 p.m.45°Fcomfortable, gusty, rain likely
- midnight44°Fcomfortable, some dew, gusty, rain likely
- 1 a.m.40°Fchilly, rain likely
- 2 a.m.40°Fchilly, rain likely
- 3 a.m.39°Fchilly, rain likely
- 4 a.m.37°Fchilly, rain likely
- 5 a.m.36°Fchilly, rain likely
- 6 a.m.35°Fchilly, chance of rain
- 7 a.m.34°Fcold, some dew, chance of rain
Times are local time at your spot (GMT-9).
What works tonight
The gear this night calls for, for someone who sleeps like you.
- Missing
Sleeping bag
Comfort 30°F or colder
Usually sold as a 21° bag. The number in a bag's name is the limit, not the comfort.
- Missing
Underneath you
R2.5 or more
The R-value says how well a pad keeps the cold ground out.
- Worth adding
Also useful
A bag liner
Adds a few degrees to the bag you already own.
Before you sleep
- Put on a warm layer and a hat before about 1 a.m., or go to bed already wearing them.
- Eat a proper meal with some fat before bed. Your body keeps burning it through the night.
- Pee right before you get in your bag. Getting out at 3 a.m. in the cold is worse.
- Sleep in dry clothes, not the ones you wore all day. Damp fabric pulls heat out of you.
- Fill a sturdy water bottle with hot (not boiling) water, check the lid does not leak, and put it in your bag by your core or feet.
- Stake out every guyline and point the low, narrow end of the tent into the wind.
- 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.
How we estimated this
At the coldest hour (7 a.m.):
- Outside at your spot
- 32°F
- Warmth your shelter holds
- +2 °F
- Air around you
- 34°F
- Your bag's comfort rating
- 39°F
- Cold ground through what you lie on
- +4 °F
- Your comfort limit
- 43°F
9 °F short, so you will likely be cold.
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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