Dew Point Calculation Chart

Home Dew Point Calculation Chart

DEW POINT:

Temperature at which moisture will condense on surface. No coatings should be applied unless surface temperature is a minimum of 5° above this point.Temperature must be maintained during dry through.

Example:

If air temperature is 60°F and relative humidity is 50% the dew point is 40°F.No coating should be applied unless surface temperature is 45° minimum.

Relative HumidityAMBIENT AIR TEMPERATURE – FAHRENHEIT
20°30°40°50°60°70°80°90°100°110°120°
90%182837475767778797107117
85%172636455565758495104113
80%162534445463738293102110
75%152433425262718091100108
70%13223140506068788896105
65%12202938475766768593103
60%11192736455564738392101
55%917253443536170808998
50%615233140505967778694
45%413212937475664737291
40%111182635435261697887
35%-28162331404857657483
30%-64132028364452616977
SURFACE TEMPERATURE AT WHICH CONDENSATION OCCURS