Mt. Wam Lookout Cabin Rental
Tonight: low 27 °F, frost likely, chance of rain, 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 February, when 1 night in 10 drops to -7°F. Frost is common in January, February, March, April, May, October, November and December.
- Jan18°F 1°FBag comfortable to 0°F · frost 99% · rain or snow 36% of days
- Feb14°F -7°FBag comfortable to -5°F · frost 99% · rain or snow 45% of days
- Mar22°F 10°FBag comfortable to 10°F · frost 96% · rain or snow 44% of days
- Apr28°F 17°FBag comfortable to 20°F · frost 80% · rain or snow 45% of days
- May37°F 30°FBag comfortable to 30°F · frost 20% · rain or snow 43% of days
- Jun45°F 37°FBag comfortable to 35°F · frost 2% · rain or snow 40% of days
- Jul53°F 45°FBag comfortable to 45°F · frost 0% · rain or snow 17% of days
- Aug53°F 45°FBag comfortable to 45°F · frost 0% · rain or snow 18% of days
- Sep (this month)45°F 36°FBag comfortable to 35°F · frost 3% · rain or snow 24% of days
- Oct33°F 22°FBag comfortable to 20°F · frost 47% · rain or snow 35% of days
- Nov24°F 13°FBag comfortable to 15°F · frost 86% · rain or snow 47% of days
- Dec19°F 1°FBag comfortable to 0°F · frost 98% · rain or snow 50% 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
Rough nightFriday, September 25, 10 p.m. to 7 a.m.
Your setup looks too cold for this night
Expected from around 10 p.m.
Your sleeping bag is not warm enough for this night.
Best change
Use a sleeping bag rated comfortable at about 25°F or colder (estimate).
- A liner or warm clothes add a few degrees, but not enough to close this gap on their own.
This is based on typical values for the gear types you picked, so treat it as an estimate.
Your night
- 10 p.m. to 2 a.m.Chilly. Add a layerAir around you 38 to 36°F, frost from midnight, strong gusts, chance of rain from 11 p.m. (up to 42 mph).
- 2 a.m. until morningCold. Your setup is not warm enoughAir around you 35 to 29°F, frost, strong gusts from 5 a.m., chance of rain (up to 39 mph).
Every hour
- 10 p.m.38°Fchilly, some dew, strong gusts
- 11 p.m.37°Fchilly, some dew, gusty, chance of rain
- midnight36°Fchilly, frost, strong gusts
- 1 a.m.36°Fchilly, frost, strong gusts, chance of rain
- 2 a.m.35°Fcold, frost, gusty, chance of rain
- 3 a.m.34°Fcold, frost, gusty
- 4 a.m.33°Fcold, frost, gusty
- 5 a.m.31°Fcold, frost, strong gusts
- 6 a.m.30°Fcold, frost, gusty
- 7 a.m.29°Fcold, frost, gusty
Times are local time at your spot (GMT-6).
What works tonight
The gear this night calls for, for someone who sleeps like you.
- Missing
Sleeping bag
Comfort 25°F or colder
Usually sold as a 16° bag. The number in a bag's name is the limit, not the comfort.
- Missing
Underneath you
R3.5 or more
The R-value says how well a pad keeps the cold ground out.
Before you sleep
- Put on a warm layer and a hat before about 10 p.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.
- Gusts get strong during the night. Do not pitch or park under dead trees or big dead branches.
- Rain is possible from about 11 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 (7 a.m.):
- Outside at your spot
- 27°F
- Warmth your shelter holds
- +2 °F
- Air around you
- 29°F
- Your bag's comfort rating
- 39°F
- Cold ground through what you lie on
- +8 °F
- Your comfort limit
- 47°F
18 °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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