Portsmouth Rhode Island Weather Almanac  
Sunday, October 17, 2021  
Mostly Cloudy, Rain & Fog early then Partly Cloudy, Windy and Cooler  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2021
    October 17, 2021   Record   Record  
Observed Daily Data   2021   2020   Norm   Depart   Highest   Lowest  
Maximum Temperature   67   58   61   +6   83   in 1938   50   in 2009  
Minimum Temperature   52   42   47   +5   62   in 1928   32   in 1937  
Average Temperature   60   50   54   +6   69   in 1938   42   in 1937  
 Month Avg Max Temperature   69.6   66.3   64.4   +5.3   71.9   in 1990   55.7   in 1896  
Month Avg Min Temperature   55.5   50.8   49.7   +5.8   55.5   in 2021   39.8   in 1981  
Month Average Temperature   62.9   58.9   57.2   +5.6   63.3   in 1990   49.9   in 1981  
High Heat Index                   85   in 1938            
Low Wind Chill       37                     30   in 1978  
HDD   5   15   11   -6   23   in 1937   0   in 2016  
Month HDD   45   105   132   -87   256   in 1981   45   in 2021  
Season HDD   70   161   212   -142   408   in 1956   70   in 2021  
CDD   0   0   0   +0   4   in 1938   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   64   51   53   +11   65   in 2016   32   in 1978  
Minimum Dew Point   46   35   41   +5   57   in 2014   20   in 1970  
Average  Dew Point   55   43   47   +8   61   in 2016   28   in 1978  
 Month Avg Max Dew Point   61.5   57.7   55.8   +5.6   62.1   in 2018   43.2   in 1981  
Month Avg Min Dew Point   53.5   45.2   43.9   +9.6   53.5   in 2021   32.1   in 1981  
Month Average Dew Point   57.7   51.7   49.8   +7.9   57.7   in 2021   37.6   in 1981  
Precipitation   .25   1.21   .14   +.11   1.93   in 1914            
One Hour   .11   .29           .65   in 2019            
Hourly Rate   1.33   .71           3.79   in 2019            
Month Precipitation   1.50   3.25   2.38   -.88   8.11   in 2005   .01   in 1963  
Year Precipitation   40.60   28.51   35.46   +5.14   51.27   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 17, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   97%   99%   91%   +6%   100%   in 2001   68%   in 1982  
Minimum Humidity   59%   45%   55%   +4%   98%   in 1993   28%   in 1953  
Average Humidity   78%   72%   73%   +5%   99%   in 1993   54%   in 1954  
Maximum Barometer   29.75   30.45   30.11   -00.36   30.68   in 1985   29.47   in 2019  
Minimum Barometer   29.61   29.98   29.86   -00.25   30.27   in 1998   28.88   in 2019  
Average Barometer   29.68   30.22   29.98   -00.30   30.46   in 1985   29.18   in 2019  
Average Wind   9.7   9.3   6.9   +2.8   14.3   in 1977   1.6   in 1960  
Direction   NW   NNW   W       SW         N        
High Wind Gust   28   30   23   +5   77   in 1908   11   in 1960  
Direction   NNW   NNW   NNW       SE         N        
Maximum Water Temp   63.1   67.6   61.6   +1.5   67.6   in 2021   56.9   in 2009  
Minimum Water Temp   61.0   66.0   59.7   +1.3   66.0   in 2021   54.6   in 2010  
Average Water Temp   62.1   66.8   60.7   +1.4   66.8   in 2021   55.8   in 2009  
Sunrise/ AM Twilight   6:58:34 AM   6:32:02 AM            
Sunset / PM Twilight   6:02:27 PM   6:28:59 PM            
Length Of Day   11:03:53                          
Special Conditions   Fog                                  
Comments                                      
Hour-by-Hour Weather For October 17, 2021            
Climate Weather for October 17            
Weather History For October 17            
Weather Calendar            
Back To Weather Stat Page            
Home