Portsmouth Rhode Island Weather Almanac  
Monday, September 12, 2022  
Cloudy, Light/Moderate Rain AM, Dense Fog PM, Very Light Winds, Cooler  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2022
    September 12, 2022   Record   Record  
Observed Daily Data   2022   2021   Norm   Depart   Highest   Lowest  
Maximum Temperature   72   75   73   -1   87   in 1961   60   in 1950  
Minimum Temperature   63   66   58   +5   71   in 1947   45   in 1985  
Average Temperature   68   71   66   +2   79   in 1961   54   in 1967  
 Month Avg Max Temperature   76.5   75.6   74.8   +1.7   85.2   in 1983   68.4   in 1917  
Month Avg Min Temperature   60.4   61.2   59.9   +0.5   66.8   in 1961   51.2   in 1893  
Month Average Temperature   68.7   68.7   67.4   +1.3   75.3   in 1961   61.9   in 1994  
High Heat Index   75   78   74   +1   92   in 1952            
Low Wind Chill                             43   in 1967  
Heating Degree Days   0   0   1   -1   11   in 1967   0   in 2022  
Month HDD   2   1   12   -10   46   in 1917   0   in 2015  
Season HDD   2   1   19   -17   46   in 1917   0   in 2015  
Cooling Degree Days   3   6   2   +1   14   in 1961   0   in 2020  
Month CDD   46   45   41   +5   124   in 1961   0   in 1893  
Year CDD   750   728   578   +172   835   in 2020   279   in 1902  
Maximum Dew Point   71   69   64   +7   73   in 2018   45   in 1985  
Minimum Dew Point   63   62   54   +9   69   in 1961   34   in 2004  
Average  Dew Point   67   66   59   +8   70   in 1971   42   in 1985  
 Month Avg Max Dew Point   65.5   66.3   64.8   +0.8   70.4   in 1961   55.8   in 1984  
Month Avg Min Dew Point   56.7   57.3   55.5   +1.2   63.8   in 1961   43.9   in 1967  
Month Average Dew Point   61.4   62.0   60.1   +1.3   67.1   in 1961   50.0   in 1967  
Precipitation   .61   .00   .12   +.49   1.19   in 1960            
One Hour   .16   .00           .34   in 1960            
Hourly Rate   1.34   .00           1.34   in 2022            
Month Precipitation   1.72   7.60   1.38   +.34   7.60   in 2021   T   in 2005  
Year Precipitation   27.14   36.70   30.66   -3.52   46.33   in 1998   17.36   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 12, 2022     Record Record
Observed Daily Data   2022   2021   Norm   Depart   Highest Lowest
Maximum Humidity   99%   92%   90%   +9%   100%   in 2018   74%   in 2002  
Minimum Humidity   96%   78%   56%   +40%   97%   in 2022   23%   in 2004  
Average Humidity   98%   85%   73%   +24%   98%   in 2022   55%   in 2002  
Maximum Barometer   30.01   30.14   30.13   -00.12   30.52   in 1966   29.77   in 1968  
Minimum Barometer   29.79   29.97   29.89   -00.10   30.30   in 2003   28.66   in 1960  
Average Barometer   29.90   30.06   30.01   -00.11   30.34   in 2012   29.29   in 1960  
Average Wind   1.8   9.5   6.4   -4.6   22.8   in 1960   1.8   in 2022  
Direction   ENE   SW   SSW       SSE ENE
High Wind Gust   7   36   22   -15   81   in 1960   7   in 2022  
Direction   NE   SSW   SSW       SSE NE  
Maximum Water Temp   71.8   71.2   69.2   +2.6   72.3   in 2005   65.1   in 2006  
Minimum Water Temp   70.9   69.6   67.3   +3.6   70.9   in 2022   63.3   in 2006  
Average Water Temp   71.4   70.4   68.3   +3.0   71.4   in 2022   64.2   in 2006  
Sunrise/ AM Twilight   6:22:19 AM   5:55:10 AM            
Sunset / PM Twilight   6:59:30 PM   7:27:34 PM            
Length Of Day   12:37:11                          
Special Conditions   Dense Fog                              
Comments   Severe Drought  
Hour-by-Hour Weather For September 12, 2022            
Climate Weather for September 12            
Weather History For September 12            
Weather Calendar            
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