Dew Point Calculator · Practical guide
Dew Point at 70 Degrees and 50 Percent Humidity
70°F at 50% relative humidity gives a dew point of about 50.5°F (10.3°C) — right at the comfortable end of the scale.
At a glance
Quick answer
At 70°F and 50% relative humidity, the dew point is approximately 50.5°F (10.3°C). That puts the air in the comfortable band — enough moisture to avoid dryness, not enough to feel humid. Condensation would only form on surfaces colder than about 50°F.
Interactive tool
Dew Point Calculator
Enter your own values, then compare the result with the examples below.
Dew Point Results
How the Number Is Computed
The calculator uses the Magnus formula: it combines the air temperature with the natural log of relative humidity to solve for the saturation temperature. Convert 70°F to 21.1°C, apply the formula at 50% RH, and you get 10.3°C — 50.5°F — as the point where the air would be 100% saturated.
Nearby Conditions for Comparison
| Air temp | Humidity | Dew point | Feel |
|---|---|---|---|
| 70°F | 30% | 37.1°F | Dry |
| 70°F | 50% | 50.5°F | Comfortable |
| 70°F | 60% | 55.5°F | Comfortable |
| 80°F | 60% | 64.8°F | Very humid |
| 90°F | 70% | 78.9°F | Very humid |
What This Means Day to Day
- A 50.5°F dew point means sweat evaporates readily — great conditions for exercise.
- Only surfaces below ~50°F will collect condensation, so windows stay clear on mild nights.
- Indoors, 50% RH at 70°F is the target zone for comfort and static control.
Try your own temperature and humidity above — the comfort label updates with every pair.
Frequently Asked Questions
Is 70 degrees and 50% humidity good indoor air?
Yes — it is often cited as the ideal. It yields a 50.5°F dew point, comfortable for breathing, kind to wood furniture, and dry enough to discourage mold and dust mites.
What is the dew point at 70 degrees and 60% humidity?
About 55.5°F (13.0°C) — still comfortable. Humidity would need to climb past roughly 70% at 70°F before the air starts to feel humid.
At what humidity does 70-degree air start feeling sticky?
Around 75-80% relative humidity, where the dew point crosses 60-62°F. Below that, 70°F air feels pleasant regardless of the percentage.
Why is dew point given in both Celsius and Fahrenheit?
The Magnus formula works in Celsius, so the calculator converts your input, solves, and displays both. 50.5°F and 10.3°C are the same answer in two units.