Monument Peak Lookout
Tonight: low 33 °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 July, typically 48°F. The coldest are in February, when 1 night in 10 drops to -17°F. Frost is common in January, February, March, April, May, June, September, October, November and December.
- Jan13°F -6°FBag comfortable to -5°F · frost 100% · rain or snow 34% of days
- Feb8°F -17°FBag comfortable to -15°F · frost 100% · rain or snow 40% of days
- Mar15°F 4°FBag comfortable to 5°F · frost 99% · rain or snow 39% of days
- Apr21°F 8°FBag comfortable to 10°F · frost 95% · rain or snow 52% of days
- May29°F 22°FBag comfortable to 25°F · frost 65% · rain or snow 52% of days
- Jun40°F 31°FBag comfortable to 30°F · frost 13% · rain or snow 52% of days
- Jul48°F 41°FBag comfortable to 40°F · frost 0% · rain or snow 33% of days
- Aug47°F 40°FBag comfortable to 40°F · frost 1% · rain or snow 27% of days
- Sep40°F 30°FBag comfortable to 30°F · frost 15% · rain or snow 33% of days
- Oct28°F 13°FBag comfortable to 15°F · frost 65% · rain or snow 37% of days
- Nov (this month)20°F 3°FBag comfortable to 5°F · frost 91% · rain or snow 29% of days
- Dec13°F -8°FBag comfortable to -10°F · frost 98% · rain or snow 33% 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 10 p.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 7 a.m.Chilly. Add a layerAir around you 41 to 36°F, gusty from 2 a.m. (up to 28 mph).
- 7 a.m. until morningCold. Your setup is not warm enoughAir around you 35°F, gusty (up to 29 mph).
Every hour
- 10 p.m.40°Fchilly
- 11 p.m.40°Fchilly
- midnight41°Fchilly
- 1 a.m.40°Fchilly
- 2 a.m.39°Fchilly, gusty
- 3 a.m.37°Fchilly, gusty
- 4 a.m.37°Fchilly
- 5 a.m.37°Fchilly, gusty
- 6 a.m.36°Fchilly, gusty
- 7 a.m.35°Fcold, gusty
Times are local time at your spot (GMT-7).
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 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.
How we estimated this
At the coldest hour (7 a.m.):
- Outside at your spot
- 33°F
- Warmth your shelter holds
- +2 °F
- Air around you
- 35°F
- Your bag's comfort rating
- 39°F
- Cold ground through what you lie on
- +4 °F
- Your comfort limit
- 43°F
8 °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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