−31 °C at a glance
- Fahrenheit
- −23.8 °F
- Kelvin
- 242.15 K
- Rankine
- 435.87 °R
- Rounded
- −24 °F
- Quick estimate
- −32 °F
- As a change (Δ)
- Δ−31 °C = Δ−55.8 °F
How to convert −31 °C to Fahrenheit
−31 × 1.8 = −55.8
−55.8 + 32 = −23.8 °F
Multiply by 9/5 (1.8) because each Celsius degree spans 1.8 Fahrenheit degrees, then add 32 because water freezes at 32 °F rather than 0. The answer always has at most one decimal place, because multiplying a whole number by 1.8 can only leave tenths.
Estimate it in your head
Double it and add 30: −31 × 2 + 30 = −32 °F, which is 8.2 degrees low — good for weather, not for cooking or medicine.
Careful with temperature changes: a rise of 31 °C is a rise of 55.8 °F — multiply by 1.8 but do not add 32.
What −31 °C feels like
−31 °C is −23.8 °F. That is 13.0 degrees colder than a home freezer at −18 °C (0 °F). Environment Canada and the US National Weather Service both warn that frostbite can develop within 30 minutes once the wind chill reaches about −28 °C (−18 °F).
| Wind | Feels like | In °F | Note |
|---|---|---|---|
| 10 km/h | −40 °C | −41 °F | Frostbite possible in 30 min or less |
| 20 km/h | −44 °C | −48 °F | Frostbite possible in 30 min or less |
| 40 km/h | −49 °C | −56 °F | Frostbite possible in 30 min or less |
Temperatures near −31 °C
| Celsius | Fahrenheit | Kelvin |
|---|---|---|
| −36 °C | −32.8 °F | 237.15 K |
| −35 °C | −31 °F | 238.15 K |
| −34 °C | −29.2 °F | 239.15 K |
| −33 °C | −27.4 °F | 240.15 K |
| −32 °C | −25.6 °F | 241.15 K |
| −31 °C | −23.8 °F | 242.15 K |
| −30 °C | −22 °F | 243.15 K |
| −29 °C | −20.2 °F | 244.15 K |
| −28 °C | −18.4 °F | 245.15 K |
| −27 °C | −16.6 °F | 246.15 K |
| −26 °C | −14.8 °F | 247.15 K |
Going the other way: −24 °F in Celsius is −31.11 °C.
Frequently asked questions
What is −31 °C in Fahrenheit?
−31 °C is −23.8 °F: multiply by 1.8 (−55.8) and add 32.
Is −31 °C hot or cold?
−31 °C is severe cold — colder than a home freezer.
How do you convert −31 °C to Fahrenheit quickly?
Double it and add 30: −32 °F. The exact value is −23.8 °F.
What is −31 °C in Kelvin?
Add 273.15: −31 °C = 242.15 K.