Portsmouth Rhode Island Weather Almanac  
Thursday, September 15, 2022  
Clear, Breezy and Cooler  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2022
    September 15, 2022   Record   Record  
Observed Daily Data   2022   2021   Norm   Depart   Highest   Lowest  
Maximum Temperature   70   79   72   -2   84   in 1941   59   in 1970  
Minimum Temperature   58   67   58   +0   70   in 2005   40   in 1895  
Average Temperature   64   73   65   -1   76   in 1931   51   in 1895  
 Month Avg Max Temperature   75.9   76.2   74.4   +1.5   82.9   in 1961   68.9   in 1917  
Month Avg Min Temperature   60.7   61.5   59.5   +1.2   66.6   in 1961   52.5   in 1967  
Month Average Temperature   68.5   69.1   66.9   +1.5   74.9   in 1961   61.8   in 1963  
High Heat Index   68   83   72   -4   85   in 2008            
Low Wind Chill                             40   in 1895  
Heating Degree Days   1   0   2   -1   14   in 1895   0   in 2021  
Month HDD   3   1   18   -15   69   in 1913   0   in 2015  
Season HDD   3   1   25   -22   69   in 1913   0   in 2015  
Cooling Degree Days   0   8   2   -2   11   in 1931   0   in 2022  
Month CDD   55   63   47   +8   148   in 1961   7   in 1975  
Year CDD   759   746   584   +175   837   in 2020   280   in 1902  
Maximum Dew Point   60   73   63   -3   74   in 1989   43   in 1975  
Minimum Dew Point   45   65   53   -8   67   in 2005   34   in 1983  
Average  Dew Point   53   69   58   -5   70   in 2005   40   in 1983  
 Month Avg Max Dew Point   65.9   66.9   64.4   +1.5   70.7   in 1961   54.9   in 1967  
Month Avg Min Dew Point   56.6   57.5   55.1   +1.5   62.8   in 1961   43.7   in 1967  
Month Average Dew Point   61.6   62.4   59.7   +1.9   66.8   in 1961   49.3   in 1967  
Precipitation   .00   .00   .14   -.14   2.26   in 1966            
One Hour   .00   .00           .78   in 2005            
Hourly Rate   .00   .00           3.00   in 2005            
Month Precipitation   3.23   7.60   1.77   +1.46   7.60   in 2021   T   in 1983  
Year Precipitation   28.65   36.70   31.05   -2.40   46.34   in 1998   17.43   in 1957  
Snow   #N/A   #N/A   0.0   #N/A       in         in    
Snow Depth   #N/A   #N/A               in         in    
Month Snow   0.0   0.0   0.0   +0.0       in         in    
Season Snow   #N/A   #N/A   #N/A   #N/A   #N/A   in #N/A   #N/A   in #N/A  
    September 15, 2022     Record Record
Observed Daily Data   2022   2021   Norm   Depart   Highest Lowest
Maximum Humidity   87%   97%   93%   -6%   100%   in 2017   73%   in 1962  
Minimum Humidity   43%   82%   61%   -18%   91%   in 2006   34%   in 1983  
Average Humidity   65%   90%   77%   -12%   95%   in 2006   54%   in 1962  
Maximum Barometer   30.15   30.07   30.12   +00.03   30.52   in 1975   29.71   in 1990  
Minimum Barometer   29.96   29.95   29.90   +00.06   30.36   in 1963   29.19   in 1966  
Average Barometer   30.06   30.01   30.01   +00.04   30.41   in 1963   29.49   in 1966  
Average Wind   8.7   9.1   6.2   +2.5   13.6   in 1967   1.4   in 2004  
Direction   NW   S   SSW       N SE
High Wind Gust   29   27   21   +8   43   in 1961   10   in 2004  
Direction   NW   SSW   SSW       S SE
Maximum Water Temp   71.1   72.5   69.0   +2.1   72.5   in 2021   65.3   in 2006  
Minimum Water Temp   69.6   70.3   67.0   +2.6   70.3   in 2021   63.3   in 2001  
Average Water Temp   70.4   71.4   68.0   +2.3   71.4   in 2021   64.4   in 2001  
Sunrise/ AM Twilight   6:25:21 AM   5:58:18 AM            
Sunset / PM Twilight   6:54:19 PM   7:22:17 PM            
Length Of Day   12:28:58                          
Special Conditions   None                              
Comments   Moderate Drought  
Hour-by-Hour Weather For September 15, 2022            
Climate Weather for September 15            
Weather History For September 15            
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