Portsmouth Rhode Island Weather Almanac  
Thursday, October 21, 2021  
Mostly Cloudy early then Clear and Continued Very Warm  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2021
    October 21, 2021   Record   Record  
Observed Daily Data   2021   2020   Norm   Depart   Highest   Lowest  
Maximum Temperature   71   69   60   +11   79   in 1920   44   in 1974  
Minimum Temperature   55   60   46   +9   61   in 2016   28   in 1972  
Average Temperature   63   65   53   +10   68   in 1920   37   in 1974  
 Month Avg Max Temperature   69.1   66.0   63.6   +5.5   70.3   in 1990   55.5   in 1896  
Month Avg Min Temperature   54.6   50.4   49.0   +5.6   54.6   in 2021   39.7   in 1981  
Month Average Temperature   62.1   58.5   56.5   +5.6   62.1   in 2021   49.9   in 1981  
High Heat Index                   80   in 1920            
Low Wind Chill                             23   in 1974  
HDD   2   0   12   -10   28   in 1974   0   in 2020  
Month HDD   69   137   178   -109   318   in 1981   69   in 2021  
Season HDD   94   193   258   -164   465   in 1956   94   in 2021  
CDD   0   0   0   +0   3   in 1920   0   in    
Month CDD   9   1   6   +3   48   in 1954   0   in 2015  
Year CDD   795   868   609   +186   868   in 2020   290   in 1902  
Maximum Dew Point   60   65   51   +9   68   in 2016   21   in 1974  
Minimum Dew Point   52   59   39   +13   60   in 2016   15   in 1974  
Average  Dew Point   56   62   45   +11   64   in 2016   18   in 1974  
 Month Avg Max Dew Point   59.7   57.5   55.0   +4.7   60.3   in 2007   43.4   in 1974  
Month Avg Min Dew Point   51.6   45.5   43.0   +8.5   51.6   in 2021   31.6   in 1981  
Month Average Dew Point   55.9   51.7   49.0   +6.9   55.9   in 2021   37.7   in 1974  
Precipitation   .00   .02   .13   -.13   1.98   in 1944            
One Hour   .00   .01           .53   in 1976            
Hourly Rate   .00   .00           1.70   in 2010            
Month Precipitation   1.50   3.65   2.92   -1.42   8.13   in 2005   .01   in 1963  
Year Precipitation   40.60   28.91   36.00   +4.60   51.27   in 1998   19.78   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 21, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   93%   100%   89%   +4%   100%   in 2020   59%   in 1952  
Minimum Humidity   55%   88%   53%   +2%   88%   in 2020   25%   in 1952  
Average Humidity   74%   94%   71%   +3%   94%   in 2020   42%   in 1952  
Maximum Barometer   30.03   30.32   30.16   -00.13   30.64   in 1933   29.66   in 1969  
Minimum Barometer   29.86   30.22   29.89   -00.03   30.44   in 1972   29.16   in 1976  
Average Barometer   29.95   30.27   30.02   -00.08   30.51   in 1983   29.46   in 1976  
Average Wind   5.3   4.7   6.8   -1.5   15.8   in 1976   1.7   in 2005  
Direction   SSW   SW   SSW       E         N        
High Wind Gust   22   17   23   -1   50   in 1904   10   in 1971  
Direction   SSW   SW   SW       SE         NE        
Maximum Water Temp   63.5   64.9   60.7   +2.8   64.9   in 2021   56.7   in 2010  
Minimum Water Temp   62.4   63.9   59.1   +3.3   63.9   in 2021   54.1   in 2018  
Average Water Temp   63.0   64.4   59.9   +3.1   64.4   in 2021   55.9   in 2018  
Sunrise/ AM Twilight   7:03:08 AM   6:36:26 AM            
Sunset / PM Twilight   5:56:28 PM   6:23:10 PM            
Length Of Day   10:53:20                          
Special Conditions   None                              
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