Portsmouth Rhode Island Weather Almanac  
Monday, July 12, 2021  
Cloudy, Light Rain & Dense Fog early and Warmer  
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    July 12, 2021   Record   Record  
Observed Daily Data   2021   2020   Norm   Depart   Highest   Lowest  
Maximum Temperature   77   86   80   -3   90   in 2011   65   in 1990  
Minimum Temperature   66   70   65   +1   72   in 1911   53   in 2002  
Average Temperature   72   78   73   -1   81   in 1911   62   in 1990  
 Month Avg Max Temperature   76.0   80.4   79.3   -3.3   85.8   in 1955   71.7   in 1914  
Month Avg Min Temperature   62.8   65.8   63.9   -1.1   70.3   in 2013   56.4   in 1962  
Month Average Temperature   69.8   73.4   71.9   -2.2   76.2   in 1981   64.8   in 1914  
HDD   0   0   0   +0   3   in 1990   0   in    
Month HDD   9   0   3   +6   23   in 1914   0   in 2020  
Season HDD   9   0   3   +6   23   in 1914   0   in 2020  
CDD   7   13   8   -1   16   in 1911   0   in 2004  
Month CDD   66   101   83   -17   134   in 1981   18   in 1909  
Year CDD   228   234   176   +52   270   in 2010   49   in 1972  
Maximum Dew Point   71   71   69   +2   76   in 2017   52   in 1978  
Minimum Dew Point   62   66   60   +2   70   in 1950   43   in 1985  
Average  Dew Point   67   69   64   +3   73   in 2010   49   in 1978  
 Month Avg Max Dew Point   69.3   70.9   67.9   +1.4   73.6   in 2013   58.4   in 1978  
Month Avg Min Dew Point   60.4   63.5   59.3   +1.1   68.1   in 2013   48.5   in 1962  
Month Average Dew Point   64.9   67.2   63.6   +1.3   70.8   in 2013   53.9   in 1978  
Precipitation   .02   .00   .10   -.08   2.45   in 2019            
One Hour   .01   .00           1.12   in 1993            
Hourly Rate   .00   .00           6.47   in 2019            
Month Precipitation   3.46   .14   1.26   +2.20   4.84   in 2009   .00   in 1908  
Year Precipitation   22.52   21.16   23.83   -1.31   40.76   in 1998   13.04   in 1957  
Snow   0.0   0.0   #####   #####   0.0   in              
Snow Depth   0   0           0   in              
Month Snow   #N/A   #N/A   #N/A   #N/A   #N/A   in #N/A   #N/A   in    
Season Snow   #N/A   #N/A   #N/A   #N/A   #N/A   in #N/A   #N/A   in #N/A  
    July 12, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   98%   97%   92%   +6%   100%   in 2003   72%   in 1971  
Minimum Humidity   73%   55%   56%   +17%   92%   in 1987   26%   in 1971  
Average Humidity   86%   76%   74%   +11%   96%   in 1987   49%   in 1971  
Maximum Barometer   30.25   29.76   30.03   +00.22   30.43   in 1898   29.50   in 1976  
Minimum Barometer   30.07   29.64   29.84   +00.23   30.23   in 1999   29.11   in 1976  
Average Barometer   30.16   29.70   29.93   +00.23   30.29   in 1996   29.31   in 1976  
Average Wind   5.4   8.8   5.5   -0.1   9.4   in 1958   1.8   in 1995  
Direction   SSE   SW   SW       SW         S        
High Wind Gust   19   32   21   -2   37   in 1970   10   in 1975  
Direction   NE   SW   SW       N         NE        
High Heat Index   80   91   80   -0   98   in 2011            
Low Wind Chill                             #N/A   in #N/A  
Maximum Water Temp   70.4   68.4   70.4   -0.0   74.9   in 2010   66.7   in 2006  
Minimum Water Temp   69.3   64.6   66.3   +3.0   71.2   in 2010   62.2   in 2006  
Average Water Temp   69.9   66.5   68.3   +1.5   73.0   in 2010   64.5   in 2006  
Sunrise/ AM Twilight   5:23:06 AM   4:50:09 AM            
Sunset / PM Twilight   8:18:59 PM   8:51:57 PM            
Length Of Day   14:55:53                          
Special Conditions   Dense Fog                              
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