Castle River Cabin
Tonight: low 42 °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 August, typically 45°F. The coldest are in February, when 1 night in 10 drops to 1°F. Frost is common in January, February, March, April, May, October, November and December.
- Jan23°F 10°FBag comfortable to 10°F · frost 96% · rain or snow 69% of days
- Feb19°F 1°FBag comfortable to 0°F · frost 98% · rain or snow 56% of days
- Mar23°F 11°FBag comfortable to 10°F · frost 97% · rain or snow 55% of days
- Apr27°F 20°FBag comfortable to 20°F · frost 82% · rain or snow 63% of days
- May34°F 29°FBag comfortable to 30°F · frost 32% · rain or snow 56% of days
- Jun40°F 34°FBag comfortable to 35°F · frost 2% · rain or snow 52% of days
- Jul45°F 40°FBag comfortable to 40°F · frost 0% · rain or snow 49% of days
- Aug45°F 40°FBag comfortable to 40°F · frost 0% · rain or snow 56% of days
- Sep40°F 33°FBag comfortable to 35°F · frost 8% · rain or snow 61% of days
- Oct31°F 22°FBag comfortable to 25°F · frost 56% · rain or snow 64% of days
- Nov (this month)25°F 16°FBag comfortable to 15°F · frost 82% · rain or snow 74% of days
- Dec22°F 2°FBag comfortable to 0°F · frost 92% · rain or snow 64% 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 lookTuesday, November 10, 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 48 to 45°F, some dew, gusty, rain likely (up to 35 mph).
Every hour
- 10 p.m.47°Fcomfortable, some dew, gusty, rain likely
- 11 p.m.47°Fcomfortable, some dew, gusty, rain likely
- midnight48°Fcomfortable, gusty, rain likely
- 1 a.m.47°Fcomfortable, some dew, gusty, rain likely
- 2 a.m.46°Fcomfortable, some dew, gusty, rain likely
- 3 a.m.46°Fcomfortable, some dew, gusty, rain likely
- 4 a.m.47°Fcomfortable, some dew, gusty, rain likely
- 5 a.m.46°Fcomfortable, some dew, gusty, rain likely
- 6 a.m.45°Fcomfortable, some dew, gusty, rain likely
- 7 a.m.46°Fcomfortable, some dew, gusty, rain likely
Times are local time at your spot (GMT-9).
What works tonight
The gear this night calls for, for someone who sleeps like you.
- You have this
Sleeping bag
Comfort 45°F or colder
Usually sold as a 36° 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.
How we estimated this
At the coldest hour (6 a.m.):
- Outside at your spot
- 43°F
- Warmth your shelter holds
- +2 °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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