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PMS 437

Weather: Temp RH and Dew Point Tables

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  1. Full Set PDF
  2. Elevation 0-500 feet (0-300 feet in Alaska), 30 in.
  3. Elevation 501-1,900 feet (301-1,700 feet in Alaska), 29 in.
  4. Elevation 1,901-3,900 feet (1,701-3,600 feet in Alaska), 27 in.
  5. Elevation 3,901-6,100 feet (3,601-5,700 feet in Alaska), 25 in.
  6. Elevation 6,101-8,500 feet (5,701-7,900 feet in Alaska), 23 in.
  7. Elevation 8,501-11,000 feet (above 7,900 feet in Alaska), 21 in.

The following tables calculate Dew Point and Relative Humidity based on the observed wet bulb and dry bulb temperatures and the elevation at the site of the observation. These can be calculated automatically using Wildland Fire RH Calculator Apps for iOS and Android available for free.

 

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Full Set PDF

Click here to obtain a full set of tables in PDF form. Another available tool is an online Dew Point calculator.

 

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Elevation 0-500 feet (0-300 feet in Alaska), 30 in.

 

Dry Bulb Temp 41-60

Psychometric Tables Pressure 30 in, DB Temp 41-60

 

Dry Bulb Temp 61-80

Psychometric Tables Pressure 30 In Mercury, DB Temp 61-80

 

Dry Bulb Temp 81-100

Psychometric Table, Pressure 30 in, DB Temp 81-100

 

Dry Bulb Temp 101-119

Psychometric Table, Pressure 30 in, DB Temp 81-100

 

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Elevation 501-1,900 feet (301-1,700 feet in Alaska), 29 in.

 

Dry Bulb Temp 41-60

Psychometric Table, Pressure 29 in, DB Temp 41-60

 

Dry Bulb Temp 61-80

Psychometric Table, Pressure 29 in, DB Temp 61-80

 

Dry Bulb Temp 81-100

Psychometric Table, Pressure 29 in, DB Temp 81-100

 

Dry Bulb Temp 101-119

Psychometric Table, Pressure 29 in, DB Temp 101-119

 

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Elevation 1,901-3,900 feet (1,701-3,600 feet in Alaska), 27 in.

 

Dry Bulb Temp 41-60

Psychometric Table, Pressure 27 in, DB Temp 41-60

 

Dry Bulb Temp 61-80

Psychometric Table, Pressure 27 in, DB Temp 61-80

 

Dry Bulb Temp 81-100

Psychometric Table, Pressure 27 in, DB Temp 81-100

 

Dry Bulb Temp 101-119

Psychometric Table, Pressure 27 in, DB Temp 101-119

 

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Elevation 3,901-6,100 feet (3,601-5,700 feet in Alaska), 25 in.

 

Dry Bulb Temp 41-60

Psychometric Table, Pressure 25 in, DB Temp 41-60

 

Dry Bulb Temp 61-80

Psychometric Table, Pressure 25 in, DB Temp 61-80

 

Dry Bulb Temp 81-100

Psychometric Table, Pressure 25 in, DB Temp 81-100

 

Dry Bulb Temp 101-119

Psychometric Tables Pressure 25 in, DB Temp 101-119

 

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Elevation 6,101-8,500 feet (5,701-7,900 feet in Alaska), 23 in.

 

Dry Bulb Temp 31-50

Psychometric Table, Pressure 23 in, DB Temp 31-50

 

Dry Bulb Temp 51-70

Psychometric Table, Pressure 23 in, DB Temp 51-70

 

Dry Bulb Temp 71-90

Psychometric Table, Pressure 23 in, DB Temp 71-90

 

Dry Bulb Temp 91-110

Psychometric Table, Pressure 23 in, DB Temp 91-109

 

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Elevation 8,501-11,000 feet (above 7,900 feet in Alaska), 21 in.

 

Dry Bulb Temp 31-50

Psychometric Table, Pressure 21 in, DB Temp 31-50

 

Dry Bulb Temp 51-70

Psychometric Table, Pressure 21 in, DB Temp 51-70

 

Dry Bulb Temp 71-90

Psychometric Table, Pressure 21 in, DB Temp 71-90

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Date:  June 12, 2026
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The Performance Support Package for this position was developed as part of the Incident Performance and Training Modernization effort. These resources support trainees, qualified personnel, and evaluators in their respective roles.

Any changes to qualification pathways will take effect with the next update of the NWCG Standards for Wildland Fire Position Qualifications, PMS 310-1, scheduled for release in January 2027.

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