Skip Navigation Linkswww.weather.gov 
NOAA logo - Click to go to the NOAA homepage National Weather Service Forecast Office   NWS logo - Click to go to the NWS homepage    
Eureka, California
navigation bar decoration    
Search Help
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
USA.gov is the U.S. Government's official Web portal to all Federal, state and local government Web resources and services
Trinidad Beach Agate Beach Mattole River
Back to Main Page
Weather Calculator

Enter a number then click on the the conversion button.
Fahrenheit
(o F)

Celsius
(o C)

Wind Speed Calculations

Enter a speed into any blank to convert to all other wind speeds.
 mph   knots     m/sec     km/hr   

Wind Chill Calculation
Enter the temperature in degrees Fahrenheit and wind speed in mph, then click on the Calculate WC to compute the windchill index.
Temp
(o F)

Wind
(mph)

Index

Relative Humidity Calculation
Enter the air temperature and the dew point in degrees Fahrenheit, then click on the Calculate RH to compute the relative humidity.
Temp
(o F)

Dew
Point

Heat Index Calculations
Enter the temperature in degrees Fahrenheit and relative humidity (RH) in percent (without the % sign), or the Dew Point (Tdp).  Then click on the Calculate HI to compute the heat index (HI).
Temp
(o F)

RH

HI

Tdp

OR
Temp
(o F)

Tdp

HI RH

Station Pressure Calculation
What is the current altimeter (inches)?
What is the station elevation? (feet)
i.e. St. Louis - Lambert= 710
     
The Station Pressure in inches is:
The Station Pressure in millibars is:
The Pressure Altitude is (feet):

Altimeter Setting Calculation
What is the current station pressure (inches)?
What is the station elevation? (feet)
i.e. St. Louis - Lambert= 710
     
The current altimeter in inches is:

Webmaster
US Dept of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
Eureka Weather Forecast Office
300 Startare Drive
Eureka, California 95501

Tel: (707) 443-6484

Disclaimer
Information Quality
Credits
Glossary		 Privacy Policy
Freedom of Information Act
About Us
Career Opportunities
National Weather Service Mission: "The National Weather Service (NWS) provides weather, hydrologic, and climate forecasts and warnings for the United States, its territories, adjacent waters and ocean areas, for the protection of life and property and the enhancement of the national economy. NWS data and products form a national information database and infrastructure which can be used by other governmental agencies, the private sector, the public, and the global community."