The map at the bottom of this page will give you a rough idea of your declination value.  But in order to get a more exact declination value for your current location today, you will need to get that information from the NOAA website at the link below:

NOAA ONLINE DECLINATION CALCULATOR

STEP 1 will be to enter your zip code. Then STEP 2 will be to press the 'Get & Add Lat/Long' button. This will auto-populate your Latitude and Longitude on the left side (as shown in 2b below). Now, your final STEP 3 will be to press the blue 'Calculate' button on the lower left. This will bring a pop-up with your Declination amount in degrees and minutes. 

Remember there are 60 minutes in each degree, so 5 degrees and 30 minutes (shown as 5°30’) would be equal to 5-1/2 (or 5.5) degrees.  You will also see a W or an E after your declination.  Westerly declination values are negative, and Easterly declination values are positive.  To learn more about how to use your declination value, click on the right-hand button below: