Portsmouth Rhode Island Weather Almanac  
Sunday, June 18, 2023  
Partly Cloudy, Very Light Rain early, Warmer  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    June 18, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   75   70   75   +0   91   in 1929   58   in 1920  
Minimum Temperature   57   54   59   -2   68   in 1929   45   in 1965  
Average Temperature   66   62   67   -1   80   in 1929   54   in 1920  
 Month Avg Max Temperature   71.1   74.2   72.0   -0.9   78.5   in 1925   64.2   in 1907  
Month Avg Min Temperature   54.4   57.9   55.8   -1.4   59.4   in 1899   49.1   in 1907  
Month Average Temperature   62.9   66.2   64.0   -1.1   68.9   in 1925   56.8   in 1907  
High Heat Index   76   69           95   in 1929            
Low Wind Chill                             44   in 1965  
Heating Degree Days   0   3   1   -1   11   in 1920   0   in 2023  
Month Heating DD   55   15   41   +14   156   in 1907   3   in 1899  
Season Heating DD   4777   5000   5469   -692   6601   in 1905   4421   in 1932  
Cooling Degree Days   1   0   2   -1   15   in 1929   0   in 2022  
Month Cooling DD   18   37   31   -13   86   in 1925   0   in 1965  
Year Cooling DD   27   60   42   -15   87   in 2001   1   in 2003  
Maximum Dew Point   63   60   64   -1   73   in 1994   42   in 1950  
Minimum Dew Point   56   45   54   +2   65   in 1994   32   in 1950  
Average  Dew Point   60   53   59   +1   69   in 1994   37   in 1950  
 Month Avg Max Dew Point   60.4   62.6   61.1   -0.6   65.8   in 1996   52.9   in 1965  
Month Avg Min Dew Point   52.1   53.1   51.2   +0.9   55.2   in 2005   42.0   in 1958  
Month Average Dew Point   56.3   57.9   56.0   +0.3   60.3   in 1996   48.2   in 1965  
Precipitation   .01   .00   .12   -.11   2.30   in 1922            
One Hour Rain   .01   .00           .23   in 2009            
Hourly Rain Rate   .04   .00           1.19   in 2004            
Month Precipitation   1.23   2.55   2.13   -.90   8.66   in 1982   T   in 1949  
Year Precipitation   21.90   21.75   21.17   +.73   38.15   in 1998   12.64   in 1957  
Snow                                      
Snow Depth                                      
Month Snow                                      
Season Snow   9.1   34.7   33.5   -24.4   84.1   in 1996   5.0   in 1998  
    June 18, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   98%   86%   92%   +6%   100%   in 2017   57%   in 1956  
Minimum Humidity   61%   57%   57%   +4%   95%   in 2017   28%   in 1950  
Average Humidity   80%   72%   75%   +5%   98%   in 2017   45%   in 1956  
Maximum Barometer   29.95   29.76   30.06   -00.11   30.39   in 1954   29.62   in 1952  
Minimum Barometer   29.66   29.55   29.85   -00.19   30.14   in 2012   29.32   in 1985  
Average Barometer   29.81   29.66   29.96   -00.15   30.25   in 1954   29.57   in 1952  
Average Wind   7.6   9.8   5.5   +2.1   10.2   in 1984   1.8   in 1998  
Direction   WNW   NW   SSW       S SSE
High Wind Gust   20   31   21   -1   41   in 1909   11   in 1998  
Direction   NW   NW   S       NW SSE
Maximum Water Temp   64.2   65.1   64.9   -0.7   69.4   in 2007   60.7   in 2003  
Minimum Water Temp   62.8   63.5   61.2   +1.6   65.7   in 2007   54.9   in 2005  
Average Water Temp   63.5   64.3   63.1   +0.4   67.6   in 2007   59.0   in 2005  
Sunrise/ AM Twilight   5:10:37 AM   4:37:11 AM            
Sunset / PM Twilight   8:21:51 PM   8:56:05 PM            
Length Of Day   15:11:14                          
Special Conditions   None                              
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