Portsmouth Rhode Island Weather Almanac  
Monday, October 11, 2021  
Mostly Cloudy early, Partly Cloudy day to Clear PM, Warmer  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2021
    October 11, 2021   Record   Record  
Observed Daily Data   2021   2020   Norm   Depart   Highest   Lowest  
Maximum Temperature   73   66   64   +9   82   in 1955   49   in 1979  
Minimum Temperature   57   49   49   +8   67   in 2018   27   in 1956  
Average Temperature   65   58   57   +8   71   in 1949   41   in 1979  
 Month Avg Max Temperature   68.4   67.4   65.5   +2.8   72.0   in 1990   56.4   in 1896  
Month Avg Min Temperature   54.5   51.2   50.7   +3.8   58.0   in 2018   41.7   in 1895  
Month Average Temperature   61.8   59.5   58.4   +3.5   64.8   in 1922   50.6   in 1981  
High Heat Index                   82   in 1955            
Low Wind Chill                             25   in 1956  
HDD   0   7   8   -8   24   in 1979   0   in 2021  
Month HDD   38   61   73   -35   158   in 1981   20   in 1959  
Season HDD   63   117   153   -90   345   in 1956   61   in 1961  
CDD   0   0   0   +0   6   in 1949   0   in    
Month CDD   3   1   6   -3   30   in 1954   0   in 2016  
Year CDD   789   868   609   +180   868   in 2020   290   in 1902  
Maximum Dew Point   63   61   55   +8   70   in 2018   27   in 1964  
Minimum Dew Point   56   43   43   +13   66   in 2018   17   in 1956  
Average  Dew Point   60   52   49   +11   68   in 2018   23   in 1956  
 Month Avg Max Dew Point   59.6   57.8   57.0   +2.6   65.5   in 2018   42.2   in 1974  
Month Avg Min Dew Point   52.5   44.6   45.1   +7.4   55.5   in 2018   32.5   in 1984  
Month Average Dew Point   56.4   51.5   51.0   +5.4   60.7   in 2018   37.7   in 1974  
Precipitation   .00   .00   .14   -.14   .81   in 1980            
One Hour   .00   .00           .36   in 2006            
Hourly Rate   .00   .00           5.76   in 2007            
Month Precipitation   1.25   .37   1.54   -.29   5.83   in 1962   .00   in 1930  
Year Precipitation   40.35   25.63   34.62   +5.73   50.80   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   1   in 1979       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 11, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   98%   91%   91%   +7%   100%   in 2018   63%   in 1964  
Minimum Humidity   64%   51%   57%   +7%   93%   in 2018   26%   in 1956  
Average Humidity   81%   71%   74%   +7%   97%   in 2018   46%   in 1964  
Maximum Barometer   30.13   30.29   30.15   -00.02   30.79   in 1972   29.66   in 1971  
Minimum Barometer   30.06   29.86   29.92   +00.14   30.43   in 1972   29.38   in 1988  
Average Barometer   30.10   30.08   30.03   +00.06   30.61   in 1972   29.53   in 1971  
Average Wind   6.4   6.7   6.5   -0.1   22.4   in 2019   1.8   in 1992  
Direction   ENE   ENE   N       NNE         NW        
High Wind Gust   18   20   21   -3   42   in 2019   7   in 1992  
Direction   NE   SW   N       NNE         NW        
Maximum Water Temp   64.4   66.6   63.2   +1.2   66.6   in 2021   59.4   in 2000  
Minimum Water Temp   63.9   65.5   61.8   +2.2   65.5   in 2021   55.4   in 2000  
Average Water Temp   64.2   66.1   62.5   +1.6   66.1   in 2021   57.4   in 2000  
Sunrise/ AM Twilight   6:51:53 AM   6:25:33 AM            
Sunset / PM Twilight   6:11:51 PM   6:38:11 PM            
Length Of Day   11:19:58                          
Special Conditions   None                              
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