Portsmouth Rhode Island Weather Almanac  
Saturday, October 30, 2021  
Cloudy, Moderate/Heavy Rain and Fog, Much Warmer  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2021
    October 30, 2021   Record   Record  
Observed Daily Data   2021   2020   Norm   Depart   Highest   Lowest  
Maximum Temperature   62   47   57   +5   72   in 1946   38   in 1925  
Minimum Temperature   50   31   43   +7   60   in 1946   24   in 1962  
Average Temperature   56   39   50   +6   66   in 1946   34   in 1928  
 Month Avg Max Temperature   66.4   63.7   62.0   +4.4   68.3   in 2017   55.7   in 1896  
Month Avg Min Temperature   52.9   49.5   47.6   +5.4   53.8   in 2017   40.9   in 1895  
Month Average Temperature   59.9   56.9   55.0   +5.0   61.3   in 2017   49.5   in 1896  
High Heat Index                       in              
Low Wind Chill       23                     21   in 1962  
HDD   9   26   15   -6   31   in 1928   0   in 1946  
Month HDD   161   246   301   -140   466   in 1896   136   in 2017  
Season HDD   186   302   381   -195   582   in 1956   186   in 2021  
CDD   0   0   0   +0   1   in 1946   0   in    
Month CDD   9   4   6   +3   48   in 1954   0   in 2015  
Year CDD   795   871   609   +186   871   in 2020   290   in 1902  
Maximum Dew Point   61   45   47   +14   64   in 2017   21   in 1966  
Minimum Dew Point   46   28   36   +10   53   in 2019   11   in 1966  
Average  Dew Point   54   37   42   +12   58   in 2019   16   in 1966  
 Month Avg Max Dew Point   58.0   56.5   53.2   +4.8   59.7   in 2017   43.2   in 1974  
Month Avg Min Dew Point   49.2   44.5   41.3   +7.9   49.2   in 2021   30.0   in 1974  
Month Average Dew Point   53.8   50.7   47.2   +6.6   54.6   in 2017   36.6   in 1974  
Precipitation   1.17   .55   .14   +1.03   1.80   in 1917            
One Hour   .26   .10           .76   in 2017            
Hourly Rate   1.95   .20           3.08   in 2017            
Month Precipitation   4.48   6.02   4.15   +.33   10.20   in 2005   .28   in 1924  
Year Precipitation   43.58   31.28   37.23   +6.35   52.05   in 1998   20.15   in 1957  
Snow   0.0   0.6   0.0   +0.0   0.6   in 2020       in    
Snow Depth   0   0   0       T   in 2011       in    
Month Snow   0.0   0.6   0.0   -0.0   0.7   in 1979       in    
Season Snow   0.0   0.6   0.0   -0.0   0.7   in 1979       in    
    October 30, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   99%   95%   87%   +12%   100%   in 2017   49%   in 1965  
Minimum Humidity   84%   85%   52%   +32%   91%   in 2004   21%   in 2001  
Average Humidity   92%   90%   69%   +22%   96%   in 2004   38%   in 1965  
Maximum Barometer   29.83   30.24   30.17   -00.34   30.77   in 1983   29.55   in 2012  
Minimum Barometer   29.49   29.64   29.90   -00.41   30.44   in 1959   29.03   in 2017  
Average Barometer   29.66   29.94   30.03   -00.37   30.57   in 1978   29.41   in 2012  
Average Wind   8.3   9.8   7.4   +0.9   20.7   in 1991   1.7   in 1997  
Direction   ESE   NE   NW       NNE         SSW        
High Wind Gust   28   33   24   +4   56   in 1991   11   in 1949  
Direction   E   NNE   N       NE         SSE        
Maximum Water Temp   59.4   61.3   57.4   +2.0   61.8   in 2017   53.2   in 2018  
Minimum Water Temp   55.4   59.9   55.4   -0.0   60.1   in 2017   50.0   in 2000  
Average Water Temp   57.4   60.6   56.4   +1.0   61.0   in 2017   51.7   in 2000  
Sunrise/ AM Twilight   7:13:40 AM   6:46:31 AM            
Sunset / PM Twilight   5:44:05 PM   6:11:15 PM            
Length Of Day   10:30:25                          
Special Conditions   Fog                                  
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