Red Mountain (MT)
Tonight: low 48 °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 55°F. The coldest are in February, when 1 night in 10 drops to -10°F. Frost is common in January, February, March, April, May, October, November and December.
- Jan19°F 1°FBag comfortable to 0°F · frost 97% · rain or snow 21% of days
- Feb17°F -10°FBag comfortable to -10°F · frost 95% · rain or snow 33% of days
- Mar24°F 14°FBag comfortable to 15°F · frost 87% · rain or snow 32% of days
- Apr30°F 19°FBag comfortable to 20°F · frost 68% · rain or snow 39% of days
- May37°F 30°FBag comfortable to 30°F · frost 19% · rain or snow 38% of days
- Jun47°F 39°FBag comfortable to 40°F · frost 0% · rain or snow 26% of days
- Jul55°F 49°FBag comfortable to 50°F · frost 0% · rain or snow 9% of days
- Aug53°F 47°FBag comfortable to 50°F · frost 0% · rain or snow 9% of days
- Sep47°F 37°FBag comfortable to 35°F · frost 3% · rain or snow 19% of days
- Oct36°F 24°FBag comfortable to 25°F · frost 36% · rain or snow 30% of days
- Nov (this month)27°F 13°FBag comfortable to 15°F · frost 71% · rain or snow 24% of days
- Dec22°F 0°FBag comfortable to 0°F · frost 86% · rain or snow 30% 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 selected gear looks warm enough
About 11 °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 55 to 50°F, gusty from 1 a.m. (up to 36 mph).
Every hour
- 10 p.m.55°Fcomfortable
- 11 p.m.55°Fcomfortable
- midnight54°Fcomfortable
- 1 a.m.53°Fcomfortable, gusty
- 2 a.m.53°Fcomfortable
- 3 a.m.54°Fcomfortable, gusty
- 4 a.m.52°Fcomfortable, gusty
- 5 a.m.51°Fcomfortable
- 6 a.m.50°Fcomfortable
- 7 a.m.50°Fcomfortable, gusty
This spot sits about 30 m below the land around it. On clear, calm nights cold air pools here, so expect it colder and wetter than the forecast.
Times are local time at your spot (GMT-7).
What works tonight
The gear this night calls for, for someone who sleeps like you.
- You have this
Sleeping bag
Comfort 50°F or colder
Usually sold as a 41° 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.
How we estimated this
At the coldest hour (6 a.m.):
- Outside at your spot
- 48°F
- Warmth your shelter holds
- +2 °F
- Air around you
- 50°F
- Your bag's comfort rating
- 39°F
- Your comfort limit
- 39°F
11 °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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