Portsmouth Rhode Island Weather Almanac  
Wednesday, October 20, 2021  
Clear to Partly Cloudy PM, Very Warm  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2021
    October 20, 2021   Record   Record  
Observed Daily Data   2021   2020   Norm   Depart   Highest   Lowest  
Maximum Temperature   73   64   60   +13   77   in 1947   43   in 1974  
Minimum Temperature   56   50   46   +10   62   in 1916   29   in 1974  
Average Temperature   65   57   53   +12   69   in 1947   36   in 1974  
 Month Avg Max Temperature   69.0   65.9   63.8   +5.2   70.8   in 1990   55.3   in 1896  
Month Avg Min Temperature   54.6   50.0   49.2   +5.4   54.8   in 2011   39.5   in 1981  
Month Average Temperature   62.1   58.2   56.7   +5.4   62.3   in 1990   49.6   in 1981  
High Heat Index                   78   in 1947            
Low Wind Chill                             25   in 1974  
HDD   0   8   12   -12   29   in 1974   0   in 2021  
Month HDD   67   137   166   -99   308   in 1981   67   in 2021  
Season HDD   92   193   246   -154   456   in 1956   92   in 2021  
CDD   0   0   0   +0   4   in 1947   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   58   62   51   +7   67   in 2011   21   in 1974  
Minimum Dew Point   44   48   39   +5   54   in 1994   13   in 1952  
Average  Dew Point   51   55   45   +6   59   in 2007   19   in 1974  
 Month Avg Max Dew Point   59.7   57.1   55.2   +4.5   60.5   in 2007   44.2   in 1981  
Month Avg Min Dew Point   51.6   44.9   43.3   +8.3   51.6   in 2021   31.5   in 1981  
Month Average Dew Point   55.9   51.2   49.2   +6.7   55.9   in 2021   37.8   in 1981  
Precipitation   .00   .38   .13   -.13   3.31   in 1996            
One Hour   .00   .17           .82   in 2012            
Hourly Rate   .00   1.32           6.86   in 2012            
Month Precipitation   1.50   3.63   2.79   -1.29   8.13   in 2005   .01   in 1963  
Year Precipitation   40.60   28.89   35.87   +4.73   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       T   in 1972       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 20, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   83%   98%   90%   -7%   100%   in 2012   61%   in 1974  
Minimum Humidity   55%   93%   54%   +1%   94%   in 1996   21%   in 1990  
Average Humidity   69%   96%   72%   -3%   97%   in 1996   50%   in 1991  
Maximum Barometer   29.98   30.31   30.13   -00.15   30.64   in 1971   29.70   in 1966  
Minimum Barometer   29.84   30.22   29.86   -00.02   30.47   in 1970   29.05   in 1927  
Average Barometer   29.91   30.27   29.99   -00.08   30.55   in 1970   29.49   in 2006  
Average Wind   6.8   2.8   6.9   -0.1   16.2   in 1961   2.6   in 1962  
Direction   WNW   S   SW       N         S        
High Wind Gust   26   16   25   +1   46   in 1960   12   in 1953  
Direction   WNW   S   SSW       SSW         SW        
Maximum Water Temp   62.6   63.9   60.6   +2.0   63.9   in 2021   56.7   in 2010  
Minimum Water Temp   62.1   61.9   59.0   +3.2   62.5   in 2016   55.0   in 2009  
Average Water Temp   62.4   62.9   59.8   +2.6   63.0   in 2007   55.9   in 2009  
Sunrise/ AM Twilight   7:01:59 AM   6:35:19 AM            
Sunset / PM Twilight   5:57:56 PM   6:24:36 PM            
Length Of Day   10:55:57                          
Special Conditions   None                              
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