Ninety Nine Is, South Carolina
  ID: USC00386293  Latitude:  35.0317  Longitude:  -81.4928
  Elevation: 500 feet ( 152.4 meters)
  Source: NOAA Climate Normals 1991-2020
  
  
      
  
  
   
  
      
  
  
    Precipitation Total: 45.32 in., 17.84 cm.
   
  
      
  
  
   
  
      
  Monthly Data Table for Ninety Nine Is, South Carolina
  Monthly Data from NOAA Monthly Normals 2006-2020
  
  
    Imperial Units
    
      | Statistic | 
      Units | 
          Jan | 
    Feb | 
    Mar | 
    Apr | 
    May | 
    Jun | 
    Jul | 
    Aug | 
    Sep | 
    Oct | 
    Nov | 
    Dec | 
    
          
      | Maximum Temperature | 
      °F | 
    50.9 | 
    55.3 | 
    62.8 | 
    71.8 | 
    78.1 | 
    85.5 | 
    88.2 | 
    87.0 | 
    81.9 | 
    72.4 | 
    61.9 | 
    54.8 | 
    
          
      | Minimum Temperature | 
      °F | 
    26.7 | 
    28.9 | 
    35.3 | 
    43.5 | 
    53.3 | 
    62.4 | 
    66.0 | 
    65.8 | 
    59.6 | 
    46.2 | 
    33.7 | 
    31.3 | 
    
      
      
          
      | Heating Degree Days | 
      °F | 
    812.0 | 
    641.2 | 
    497.2 | 
    236.5 | 
    68.9 | 
    1.6 | 
    0.0 | 
    0.1 | 
    17.4 | 
    211.1 | 
    516.1 | 
    680.6 | 
    
          
      | Cooling Degree Days | 
      °F | 
    0.0 | 
    0.0 | 
    2.8 | 
    16.0 | 
    90.6 | 
    270.1 | 
    375.1 | 
    353.4 | 
    189.8 | 
    34.4 | 
    0.3 | 
    0.1 | 
    
          
      | Precipitation | 
      I | 
    3.5 | 
    3.1 | 
    3.6 | 
    3.9 | 
    4.0 | 
    3.8 | 
    3.8 | 
    4.5 | 
    3.5 | 
    3.2 | 
    3.7 | 
    4.8 | 
    
  
   
  
  
  
  
    Metric Units
    
      | Statistic | 
      Units | 
          Jan | 
    Feb | 
    Mar | 
    Apr | 
    May | 
    Jun | 
    Jul | 
    Aug | 
    Sep | 
    Oct | 
    Nov | 
    Dec | 
    
          
      | Maximum Temperature | 
      °C | 
    10.5 | 
    12.9 | 
    17.1 | 
    22.1 | 
    25.6 | 
    29.7 | 
    31.2 | 
    30.6 | 
    27.7 | 
    22.4 | 
    16.6 | 
    12.7 | 
    
          
      | Minimum Temperature | 
      °C | 
    -2.9 | 
    -1.7 | 
    1.8 | 
    6.4 | 
    11.8 | 
    16.9 | 
    18.9 | 
    18.8 | 
    15.3 | 
    7.9 | 
    0.9 | 
    -0.4 | 
    
      
      
          
      | Heating Degree Days | 
      °C | 
    433.3 | 
    338.4 | 
    258.4 | 
    113.6 | 
    20.5 | 
    -16.9 | 
    -17.8 | 
    -17.7 | 
    -8.1 | 
    99.5 | 
    268.9 | 
    360.3 | 
    
          
      | Cooling Degree Days | 
      °C | 
    -17.8 | 
    -17.8 | 
    -16.2 | 
    -8.9 | 
    32.6 | 
    132.3 | 
    190.6 | 
    178.6 | 
    87.7 | 
    1.3 | 
    -17.6 | 
    -17.7 | 
    
          
      | Precipitation | 
      M | 
    8.8 | 
    7.8 | 
    9.2 | 
    9.9 | 
    10.3 | 
    9.6 | 
    9.7 | 
    11.3 | 
    8.8 | 
    8.1 | 
    9.3 | 
    12.2 |