Portsmouth Rhode Island Weather Almanac  
Saturday, October 9, 2021  
Cloudy to Mostly Cloudy PM, Cooler  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2021
    October 9, 2021   Record   Record  
Observed Daily Data   2021   2020   Norm   Depart   Highest   Lowest  
Maximum Temperature   63   62   64   -1   85   in 2011   47   in 2000  
Minimum Temperature   56   44   50   +6   67   in 2017   32   in 1953  
Average Temperature   60   53   57   +3   71   in 2011   43   in 1896  
 Month Avg Max Temperature   68.4   67.3   65.9   +2.6   74.1   in 1941   57.0   in 1896  
Month Avg Min Temperature   54.1   50.4   51.1   +3.0   58.7   in 1927   42.1   in 1992  
Month Average Temperature   61.7   59.1   58.7   +3.0   66.3   in 1927   51.1   in 1899  
High Heat Index                   85   in 2011            
Low Wind Chill       40                     30   in 1953  
HDD   5   12   8   -3   22   in 1896   0   in 2018  
Month HDD   33   54   57   -24   125   in 1899   15   in 1922  
Season HDD   58   110   137   -79   303   in 1956   57   in 1961  
CDD   0   0   0   +0   6   in 2011   0   in    
Month CDD   3   1   6   -3   28   in 1927   0   in 2016  
Year CDD   789   868   609   +180   868   in 2020   290   in 1902  
Maximum Dew Point   56   56   56   +0   70   in 2005   31   in 1978  
Minimum Dew Point   53   28   44   +9   67   in 2017   23   in 1980  
Average  Dew Point   55   42   50   +5   68   in 2017   29   in 1978  
 Month Avg Max Dew Point   59.2   56.9   57.4   +1.8   65.8   in 2005   42.6   in 1974  
Month Avg Min Dew Point   51.9   44.2   45.6   +6.3   55.4   in 2005   31.2   in 1984  
Month Average Dew Point   55.9   50.9   51.4   +4.4   60.6   in 2005   37.6   in 1984  
Precipitation   .00   .00   .14   -.14   1.77   in 1906            
One Hour   .00   .00           .72   in 1961            
Hourly Rate   .00   .00           1.55   in 2005            
Month Precipitation   1.14   .37   1.26   -.12   5.83   in 1962   .00   in 1930  
Year Precipitation   40.24   25.63   34.34   +5.90   50.17   in 1998   18.73   in 1957  
Snow   #N/A   #N/A   #N/A   #N/A   #N/A   in #N/A            
Snow Depth   #N/A   #N/A           #N/A   in              
Month Snow   #N/A   #N/A   #N/A   #N/A   #N/A   in #N/A   #N/A   in    
Season Snow   #N/A   #N/A   #N/A   #N/A   #N/A   in #N/A   #N/A   in #N/A  
    October 9, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   93%   88%   92%   +1%   100%   in 2017   65%   in 1972  
Minimum Humidity   76%   32%   60%   +16%   95%   in 2017   27%   in 1980  
Average Humidity   85%   60%   76%   +9%   98%   in 2017   52%   in 1980  
Maximum Barometer   30.32   30.24   30.15   +00.17   30.64   in 2001   29.63   in 1965  
Minimum Barometer   30.23   30.08   29.90   +00.33   30.45   in 2001   29.18   in 1996  
Average Barometer   30.28   30.16   30.03   +00.25   30.55   in 2001   29.48   in 1996  
Average Wind   5.7   7.2   6.6   -0.9   17.2   in 2019   1.8   in 2003  
Direction   ENE   NNW   NNE       NNE         ESE        
High Wind Gust   15   20   23   -8   39   in 1996   10   in 1974  
Direction   ESE   NNW   SW       NNW         NNW        
Maximum Water Temp   63.1   67.3   63.8   -0.7   68.2   in 2005   59.4   in 2010  
Minimum Water Temp   60.8   66.2   62.1   -1.3   66.2   in 2021   56.3   in 2001  
Average Water Temp   62.0   66.8   63.0   -1.0   67.0   in 2005   58.5   in 2001  
Sunrise/ AM Twilight   6:49:42 AM   6:23:24 AM            
Sunset / PM Twilight   6:15:05 PM   6:41:22 PM            
Length Of Day   11:25:23                          
Special Conditions   None                              
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