Portsmouth Rhode Island Weather Almanac  
Monday, October 18, 2021  
Partly Cloudy, Windy and Much Cooler (Seasonal Temperatures)  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2021
    October 18, 2021   Record   Record  
Observed Daily Data   2021   2020   Norm   Depart   Highest   Lowest  
Maximum Temperature   60   62   61   -1   77   in 1908   46   in 1939  
Minimum Temperature   47   40   47   +0   63   in 1928   29   in 1978  
Average Temperature   54   51   54   +0   68   in 2016   39   in 1939  
 Month Avg Max Temperature   69.1   66.1   64.2   +4.9   71.9   in 1990   55.6   in 1896  
Month Avg Min Temperature   55.1   50.2   49.6   +5.5   55.1   in 2021   39.6   in 1981  
Month Average Temperature   62.4   58.4   57.1   +5.3   63.6   in 1990   49.8   in 1981  
High Heat Index                   78   in 1908            
Low Wind Chill   42   40                     26   in 2009  
HDD   11   14   11   +0   26   in 1939   0   in 2016  
Month HDD   56   119   143   -87   273   in 1981   54   in 1990  
Season HDD   81   175   223   -142   415   in 1956   81   in 2021  
CDD   0   0   0   +0   3   in 2016   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   46   46   52   -6   67   in 2016   29   in 1972  
Minimum Dew Point   41   38   40   +1   60   in 2016   19   in 2018  
Average  Dew Point   44   42   46   -2   64   in 2016   26   in 2018  
 Month Avg Max Dew Point   60.6   57.1   55.6   +5.0   60.7   in 1990   44.1   in 1981  
Month Avg Min Dew Point   52.8   44.8   43.7   +9.1   52.8   in 2021   32.2   in 1981  
Month Average Dew Point   56.9   51.2   49.6   +7.3   56.9   in 2021   38.1   in 1981  
Precipitation   .00   .00   .14   -.14   3.38   in 1932            
One Hour   .00   .00           .43   in 1990            
Hourly Rate   .00   .00           .42   in 2009            
Month Precipitation   1.50   3.25   2.52   -1.02   8.13   in 2005   .01   in 1963  
Year Precipitation   40.60   28.51   35.60   +5.00   51.27   in 1998   18.89   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 18, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   85%   93%   90%   -5%   100%   in 2016   62%   in 1958  
Minimum Humidity   50%   46%   54%   -4%   94%   in 1989   29%   in 1958  
Average Humidity   68%   70%   72%   -4%   96%   in 1989   46%   in 1958  
Maximum Barometer   29.86   30.54   30.13   -00.27   30.63   in 1985   29.57   in 1964  
Minimum Barometer   29.71   30.40   29.88   -00.17   30.40   in 2020   29.34   in 1903  
Average Barometer   29.79   30.47   30.01   -00.22   30.47   in 2020   29.53   in 1964  
Average Wind   9.3   3.3   7.3   +2.0   15.3   in 2009   2.2   in 1994  
Direction   NW   ENE   W       NNE         NW        
High Wind Gust   26   17   24   +2   43   in 1999   10   in 1994  
Direction   NW   S   WNW       NNW         SSE        
Maximum Water Temp   62.2   66.0   61.2   +1.0   66.0   in 2021   56.7   in 2009  
Minimum Water Temp   61.0   63.9   59.4   +1.6   63.9   in 2021   53.6   in 2009  
Average Water Temp   61.6   65.0   60.3   +1.3   65.0   in 2021   55.2   in 2009  
Sunrise/ AM Twilight   6:59:42 AM   6:33:08 AM            
Sunset / PM Twilight   6:00:56 PM   6:27:30 PM            
Length Of Day   11:01:14                          
Special Conditions   None                              
Comments                                      
Hour-by-Hour Weather For October 18, 2021            
Climate Weather for October 18            
Weather History For October 18            
Weather Calendar            
Back To Weather Stat Page            
Home