Summersville Lake Shelters
Tonight: low 46 °F, some dew.
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 68°F. The coldest are in January, when 1 night in 10 drops to 10°F. Frost is common in January, February, March, April, November and December.
- Jan28°F 10°FBag comfortable to 10°F · frost 67% · rain or snow 50% of days
- Feb32°F 19°FBag comfortable to 20°F · frost 55% · rain or snow 53% of days
- Mar37°F 24°FBag comfortable to 25°F · frost 36% · rain or snow 45% of days
- Apr45°F 32°FBag comfortable to 35°F · frost 10% · rain or snow 49% of days
- May57°F 43°FBag comfortable to 45°F · frost 1% · rain or snow 60% of days
- Jun63°F 55°FBag comfortable to 55°F · frost 0% · rain or snow 51% of days
- Jul68°F 62°FBag comfortable to 60°F · frost 0% · rain or snow 53% of days
- Aug66°F 59°FBag comfortable to 60°F · frost 0% · rain or snow 51% of days
- Sep (this month)62°F 52°FBag comfortable to 55°F · frost 0% · rain or snow 35% of days
- Oct50°F 40°FBag comfortable to 40°F · frost 0% · rain or snow 35% of days
- Nov38°F 27°FBag comfortable to 25°F · frost 24% · rain or snow 38% of days
- Dec32°F 21°FBag comfortable to 20°F · frost 52% · rain or snow 44% 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
Good nightFriday, September 25, 10 p.m. to 7 a.m.
Your selected gear looks warm enough
About 7 °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 56 to 46°F, some dew.
Every hour
- 10 p.m.56°Fcomfortable, some dew
- 11 p.m.54°Fcomfortable, some dew
- midnight53°Fcomfortable, some dew
- 1 a.m.51°Fcomfortable, some dew
- 2 a.m.51°Fcomfortable
- 3 a.m.51°Fcomfortable
- 4 a.m.49°Fcomfortable
- 5 a.m.48°Fcomfortable
- 6 a.m.47°Fcomfortable
- 7 a.m.46°Fcomfortable
Times are local time at your spot (GMT-4).
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
- Bring shoes, clothes and electronics inside. Anything left out will be wet by morning.
How we estimated this
At the coldest hour (7 a.m.):
- Outside at your spot
- 46°F
- Warmth your shelter holds
- +2 °F
- Clear-sky cooling
- −2 °F
- Air around you
- 46°F
- Your bag's comfort rating
- 39°F
- Your comfort limit
- 39°F
7 °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