Prior Flat Campground
Tonight: low 51 °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 January, when 1 night in 10 drops to -3°F. Frost is common in January, February, March, April, May, October, November and December.
- Jan9°F -3°FBag comfortable to -5°F · frost 100% · rain or snow 27% of days
- Feb10°F -5°FBag comfortable to -5°F · frost 99% · rain or snow 25% of days
- Mar17°F 5°FBag comfortable to 5°F · frost 97% · rain or snow 29% of days
- Apr22°F 9°FBag comfortable to 10°F · frost 88% · rain or snow 35% of days
- May34°F 23°FBag comfortable to 25°F · frost 43% · rain or snow 40% of days
- Jun46°F 38°FBag comfortable to 40°F · frost 1% · rain or snow 26% of days
- Jul55°F 48°FBag comfortable to 50°F · frost 0% · rain or snow 20% of days
- Aug52°F 46°FBag comfortable to 45°F · frost 0% · rain or snow 18% of days
- Sep (this month)45°F 34°FBag comfortable to 35°F · frost 6% · rain or snow 21% of days
- Oct32°F 15°FBag comfortable to 15°F · frost 53% · rain or snow 22% of days
- Nov21°F 6°FBag comfortable to 5°F · frost 88% · rain or snow 21% of days
- Dec12°F -1°FBag comfortable to 0°F · frost 99% · rain or snow 24% 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 lookFriday, September 25, 10 p.m. to 7 a.m.
Your selected gear looks warm enough
About 13 °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 59 to 52°F, gusty (up to 28 mph).
Every hour
- 10 p.m.59°Fcomfortable, gusty
- 11 p.m.58°Fcomfortable, gusty
- midnight57°Fcomfortable
- 1 a.m.57°Fcomfortable
- 2 a.m.56°Fcomfortable
- 3 a.m.55°Fcomfortable
- 4 a.m.54°Fcomfortable
- 5 a.m.53°Fcomfortable
- 6 a.m.52°Fcomfortable
- 7 a.m.53°Fcomfortable
This spot sits about 23 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-6).
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 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.
How we estimated this
At the coldest hour (6 a.m.):
- Outside at your spot
- 51°F
- Warmth your shelter holds
- +2 °F
- Clear-sky cooling
- −1 °F
- Air around you
- 52°F
- Your bag's comfort rating
- 39°F
- Your comfort limit
- 39°F
13 °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.
Book or read more on Recreation.gov