Dew Point Chart
Look up the dew point (°F) for any air temperature and relative humidity. Find your temperature down the left, your humidity across the top, and read the dew point where they meet.
| Temp ↓ / RH → | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% | 100% |
|---|---|---|---|---|---|---|---|---|---|---|
| 40°F | -12° | 2° | 11° | 18° | 23° | 27° | 31° | 34° | 37° | 40° |
| 45°F | -8° | 6° | 15° | 22° | 28° | 32° | 36° | 39° | 42° | 45° |
| 50°F | -4° | 11° | 20° | 27° | 32° | 37° | 41° | 44° | 47° | 50° |
| 55°F | -1° | 15° | 24° | 31° | 37° | 41° | 45° | 49° | 52° | 55° |
| 60°F | 3° | 19° | 29° | 36° | 41° | 46° | 50° | 54° | 57° | 60° |
| 65°F | 7° | 23° | 33° | 40° | 46° | 51° | 55° | 59° | 62° | 65° |
| 70°F | 11° | 27° | 37° | 45° | 51° | 56° | 60° | 64° | 67° | 70° |
| 75°F | 15° | 31° | 42° | 49° | 55° | 60° | 65° | 68° | 72° | 75° |
| 80°F | 19° | 35° | 46° | 54° | 60° | 65° | 69° | 73° | 77° | 80° |
| 85°F | 22° | 39° | 50° | 58° | 64° | 70° | 74° | 78° | 82° | 85° |
| 90°F | 26° | 44° | 54° | 62° | 69° | 74° | 79° | 83° | 87° | 90° |
| 95°F | 30° | 48° | 59° | 67° | 74° | 79° | 84° | 88° | 92° | 95° |
| 100°F | 34° | 52° | 63° | 71° | 78° | 84° | 89° | 93° | 97° | 100° |
Need an exact value? Use the calculator
The chart rounds to whole degrees at 5°F and 10% steps. For an exact dew point — in °F or °C, at any elevation — enter your readings below.
How to read the dew point chart
Each cell is the temperature the air would have to cool to before water vapor starts condensing. Read across any row and you'll notice the dew point climbs steadily with humidity; read down any column and the dew point rises with temperature because warmer air holds far more moisture. The color tells you how that dew point feels: greens are comfortable, yellows and oranges are sticky, and reds are the oppressive, tropical air that ruins sleep and drives heat stress.
Why the dew point is the better comfort gauge
Relative humidity only makes sense once you also know the temperature — 80% humidity is trivial at 40°F but brutal at 90°F. The dew point needs no such context: a 70°F dew point feels oppressive whether the thermometer reads 75°F or 95°F. That is why pilots, HVAC engineers, and meteorologists lean on it. For the full comparison, read Dew Point vs Relative Humidity: Which One Actually Matters?
Dew point and condensation
The chart doubles as a condensation guide. Any surface colder than the dew point — a single-pane window, an uninsulated pipe, a basement wall — will pull moisture straight out of the air and begin to sweat. If your indoor dew point is 60°F and a window sits at 55°F, expect fog and drips. See Condensation Risk: Why Pipes Sweat and How to Stop It for fixes, or jump to the dew point calculator for a single reading.
Frequently Asked Questions
- What is a dew point chart?
- A dew point chart is a look-up table that shows the dew point for each combination of air temperature and relative humidity, so you can read off the condensation temperature without doing any math.
- How do you read a dew point chart?
- Find your air temperature in the left column and your relative humidity across the top. The cell where they meet is the dew point. The cell color shows how humid that dew point feels, from dry to oppressive.
- What is a good dew point?
- A dew point below 60°F feels comfortable to most people. Between 60 and 65°F the air feels sticky, from 65 to 70°F it feels humid, and above 70°F it feels oppressive regardless of the air temperature.
- Does the dew point change with temperature?
- The dew point of a given air mass stays constant as the temperature changes, as long as no moisture is added or removed. Relative humidity is different — it rises as the air cools and falls as the air warms, which is why the chart values shift along each row.
- Is this dew point chart in Fahrenheit or Celsius?
- The chart is in Fahrenheit. Use the calculator above for Celsius, for elevations other than sea level, or for exact dew points between the chart's 5-degree and 10-percent steps.