Matt
Tonight: low 11 °C, calm and dry.
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 9°C. The coldest are in January, when 1 night in 10 drops to -13°C. Frost is common in January, February, March, April, May, September, October, November and December.
- Jan-8°C -13°CBag comfortable to -12°C · frost 97% · rain or snow 54% of days
- Feb-5°C -12°CBag comfortable to -11°C · frost 96% · rain or snow 45% of days
- Mar-4°C -9°CBag comfortable to -8°C · frost 93% · rain or snow 50% of days
- Apr-1°C -7°CBag comfortable to -6°C · frost 67% · rain or snow 51% of days
- May2°C -2°CBag comfortable to -1°C · frost 29% · rain or snow 70% of days
- Jun7°C 4°CBag comfortable to 5°C · frost 0% · rain or snow 73% of days
- Jul9°C 6°CBag comfortable to 7°C · frost 0% · rain or snow 74% of days
- Aug9°C 5°CBag comfortable to 6°C · frost 0% · rain or snow 68% of days
- Sep (this month)6°C 0°CBag comfortable to 1°C · frost 10% · rain or snow 59% of days
- Oct2°C -3°CBag comfortable to -1°C · frost 31% · rain or snow 45% of days
- Nov-3°C -10°CBag comfortable to -9°C · frost 79% · rain or snow 48% of days
- Dec-6°C -11°CBag comfortable to -10°C · frost 95% · rain or snow 48% of days
| = 0°C
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, 22:00 to 07:00
Your selected gear looks warm enough
About 6 °C 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
- 22:00 until morningComfortableAir around you 13 to 10°C.
Every hour
- 22:0012°Ccomfortable
- 23:0012°Ccomfortable
- 00:0012°Ccomfortable
- 01:0011°Ccomfortable
- 02:0011°Ccomfortable
- 03:0011°Ccomfortable
- 04:0010°Ccomfortable
- 05:0013°Ccomfortable
- 06:0010°Ccomfortable
- 07:0010°Ccomfortable
This spot sits about 90 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+2).
What works tonight
The gear this night calls for, for someone who sleeps like you.
- You have this
Sleeping bag
Comfort 9°C or colder
The comfort rating on the label, not the limit, which is about 5 °C lower.
- You have this
Underneath you
R1 or more
The R-value says how well a pad keeps the cold ground out.
Before you sleep
- Your spot sits lower than the ground around it. On a clear, calm night cold air drains into spots like this, so expect it colder and wetter than the forecast. If you can, move a little higher up, away from the creek or valley floor.
How we estimated this
At the coldest hour (07:00):
- Outside at your spot
- 12°C
- Warmth your shelter holds
- +1 °C
- Clear-sky cooling
- −1 °C
- Low spot
- −3 °C
- Air around you
- 9°C
- Your bag's comfort rating
- 4°C
- Your comfort limit
- 4°C
5 °C 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.