Portsmouth Rhode Island Weather Almanac  
Tuesday, October 12, 2021  
Dense Fog early then Partly Cloudy, Very Light Winds and Continued Warm  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2021
    October 12, 2021   Record   Record  
Observed Daily Data   2021   2020   Norm   Depart   Highest   Lowest  
Maximum Temperature   73   57   63   +10   79   in 1954   49   in 1987  
Minimum Temperature   55   50   49   +6   65   in 1990   27   in 1956  
Average Temperature   64   54   56   +8   71   in 1954   41   in 1956  
 Month Avg Max Temperature   68.8   66.5   65.3   +3.4   72.3   in 1990   56.2   in 1896  
Month Avg Min Temperature   54.6   51.1   50.6   +4.0   57.3   in 2018   41.2   in 1956  
Month Average Temperature   62.0   59.1   58.2   +3.8   64.3   in 1922   50.0   in 1981  
High Heat Index                   81   in 1954            
Low Wind Chill                             27   in 1956  
HDD   1   11   9   -8   24   in 1956   0   in 1990  
Month HDD   39   72   82   -43   180   in 1981   27   in 1959  
Season HDD   64   128   162   -98   369   in 1956   61   in 1961  
CDD   0   0   0   +0   6   in 1954   0   in    
Month CDD   3   1   6   -3   36   in 1954   0   in 2016  
Year CDD   789   868   609   +180   868   in 2020   290   in 1902  
Maximum Dew Point   63   51   55   +8   69   in 2018   30   in 1957  
Minimum Dew Point   55   42   43   +12   65   in 1990   13   in 1963  
Average  Dew Point   59   47   49   +10   67   in 1990   27   in 1957  
 Month Avg Max Dew Point   59.9   57.3   56.8   +3.1   65.8   in 2018   43.2   in 1974  
Month Avg Min Dew Point   52.7   44.4   44.9   +7.8   54.8   in 2005   32.8   in 1956  
Month Average Dew Point   56.6   51.2   50.8   +5.8   60.3   in 2018   38.4   in 1974  
Precipitation   .00   .05   .14   -.14   1.61   in 2018            
One Hour   .00   .02           .48   in 1948            
Hourly Rate   .00   .00           1.77   in 2006            
Month Precipitation   1.25   .42   1.68   -.43   5.83   in 1962   .00   in 1930  
Year Precipitation   40.35   25.68   34.76   +5.59   50.80   in 1998   18.73   in 1957  
Snow   0.0   0.0   0.0   +0.0   0.0   in         in    
Snow Depth   0   0   0       0   in         in    
Month Snow   0.0   0.0   0.0   -0.0   0.7   in 1979       in    
Season Snow   0.0   0.0   0.0   -0.0   0.7   in 1979       in    
    October 12, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   99%   88%   91%   +8%   100%   in 2018   60%   in 1958  
Minimum Humidity   66%   75%   56%   +10%   89%   in 1975   19%   in 1963  
Average Humidity   83%   82%   74%   +9%   94%   in 2002   43%   in 1963  
Maximum Barometer   30.16   30.31   30.15   +00.01   30.59   in 1994   29.58   in 1950  
Minimum Barometer   30.05   30.12   29.90   +00.15   30.44   in 1994   29.37   in 1950  
Average Barometer   30.11   30.22   30.03   +00.08   30.52   in 1994   29.48   in 1950  
Average Wind   2.8   7.3   6.6   -3.8   14.3   in 2002   2.1   in 2016  
Direction   ENE   ENE   N       NNE         SE        
High Wind Gust   9   21   22   -13   48   in 1926   9   in 2021  
Direction   NE   SE   SW       S         NE        
Maximum Water Temp   63.9   66.9   63.0   +0.9   66.9   in 2021   59.7   in 2010  
Minimum Water Temp   62.2   65.7   61.2   +1.0   65.7   in 2021   57.4   in 2000  
Average Water Temp   63.1   66.3   62.1   +0.9   66.3   in 2021   58.9   in 2000  
Sunrise/ AM Twilight   6:52:59 AM   6:26:37 AM            
Sunset / PM Twilight   6:10:15 PM   6:36:37 PM            
Length Of Day   11:17:16                          
Special Conditions   Dense Fog                              
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