Portsmouth Rhode Island Weather Almanac  
Sunday, October 31, 2021  
Cloudy, Moderate Rain & Fog early then Partly Cloudy, Continued Very Warm  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2021
    October 31, 2021   Record   Record  
Observed Daily Data   2021   2020   Norm   Depart   Highest   Lowest  
Maximum Temperature   66   49   57   +9   76   in 1946   42   in 1925  
Minimum Temperature   55   28   43   +12   61   in 2019   26   in 1966  
Average Temperature   61   39   50   +11   67   in 1946   36   in 1925  
 Month Avg Max Temperature   66.4   63.3   61.9   +4.5   68.0   in 2017   56.1   in 1925  
Month Avg Min Temperature   53.0   48.8   47.4   +5.6   53.4   in 2017   40.6   in 1895  
Month Average Temperature   60.0   56.4   54.8   +5.2   60.9   in 2017   49.3   in 1895  
High Heat Index                   78   in 1946            
Low Wind Chill       24                     24   in 2020  
HDD   4   26   15   -11   29   in 1925   0   in 2019  
Month HDD   165   272   316   -151   486   in 1895   151   in 2017  
Season HDD   190   328   396   -206   591   in 1956   190   in 2021  
CDD   0   0   0   +0   2   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   60   37   47   +13   65   in 2019   22   in 1975  
Minimum Dew Point   51   24   35   +16   60   in 2019   15   in 1975  
Average  Dew Point   56   31   41   +15   63   in 2019   19   in 1975  
 Month Avg Max Dew Point   58.1   55.8   53.0   +5.1   59.1   in 2017   43.7   in 1974  
Month Avg Min Dew Point   49.3   43.8   41.1   +8.2   49.3   in 2021   30.8   in 1974  
Month Average Dew Point   53.9   50.1   47.0   +6.9   54.1   in 2017   37.2   in 1974  
Precipitation   .42   .00   .13   +.29   2.76   in 1939            
One Hour   .22   .00           .71   in 1989            
Hourly Rate   .33   .00           1.24   in 2012            
Month Precipitation   4.90   6.02   4.28   +.62   10.20   in 2005   .28   in 1924  
Year Precipitation   44.00   31.28   37.36   +6.64   52.05   in 1998   20.16   in 1957  
Snow   0.0   0.0   0.0   +0.0   0.0   in         in    
Snow Depth   0   T   0       T   in 2020       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 31, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   99%   92%   89%   +10%   100%   in 2004   59%   in 1964  
Minimum Humidity   68%   44%   56%   +12%   95%   in 1993   23%   in 1950  
Average Humidity   84%   68%   72%   +11%   98%   in 1993   45%   in 1952  
Maximum Barometer   29.73   30.54   30.18   -00.45   30.84   in 1986   29.58   in 2012  
Minimum Barometer   29.37   30.24   29.92   -00.55   30.48   in 1981   29.22   in 1973  
Average Barometer   29.55   30.39   30.05   -00.50   30.64   in 1986   29.45   in 1973  
Average Wind   6.3   4.2   6.9   -0.6   16.1   in 1991   2.3   in 2011  
Direction   SSW   NNW   N       NNE         SE        
High Wind Gust   17   16   24   -7   50   in 1991   11   in 1970  
Direction   #N/A   #N/A   SSW       NNE         W        
Maximum Water Temp   57.0   62.1   57.3   -0.3   62.1   in 2021   52.5   in 2018  
Minimum Water Temp   54.9   61.3   55.5   -0.6   61.3   in 2021   50.5   in 2018  
Average Water Temp   56.0   61.7   56.4   -0.4   61.7   in 2021   51.5   in 2018  
Sunrise/ AM Twilight   7:14:52 AM   6:47:39 AM            
Sunset / PM Twilight   5:42:49 PM   6:10:03 PM            
Length Of Day   10:27:57                          
Special Conditions   Fog                                  
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