Portsmouth Rhode Island Weather Almanac  
Tuesday, July 27, 2021  
Clear to Partly Cloudy PM, Light Fog & Haze, Continued Warm  
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    July 27, 2021   Record   Record  
Observed Daily Data   2021   2020   Norm   Depart   Highest   Lowest  
Maximum Temperature   88   92   80   +8   94   in 1940   67   in 1993  
Minimum Temperature   66   72   65   +1   73   in 1995   53   in 2001  
Average Temperature   77   82   73   +4   82   in 2020   63   in 2001  
 Month Avg Max Temperature   79.3   82.8   79.7   -0.4   84.4   in 1955   73.5   in 1902  
Month Avg Min Temperature   65.2   66.6   64.6   +0.6   70.1   in 2013   59.2   in 1962  
Month Average Temperature   72.6   75.0   72.5   +0.0   76.3   in 2013   67.4   in 1902  
HDD   0   0   0   +0   2   in 2001   0   in    
Month HDD   9   0   3   +6   23   in 1914   0   in 2020  
Season HDD   9   0   3   +6   23   in 1914   0   in 2020  
CDD   12   17   8   +4   17   in 2020   0   in 2004  
Month CDD   213   271   203   +10   306   in 2013   78   in 1902  
Year CDD   375   404   296   +79   441   in 2010   103   in 1902  
Maximum Dew Point   71   72   69   +2   79   in 1995   54   in 2001  
Minimum Dew Point   60   65   61   -1   71   in 2018   44   in 1977  
Average  Dew Point   66   69   65   +1   75   in 1995   50   in 2001  
 Month Avg Max Dew Point   70.7   71.5   68.5   +2.2   73.4   in 2013   62.0   in 1962  
Month Avg Min Dew Point   62.3   63.6   60.1   +2.2   67.4   in 2013   52.1   in 1965  
Month Average Dew Point   66.5   67.6   64.3   +2.2   70.4   in 2013   57.1   in 1965  
Precipitation   T   .00   .10   .00   1.92   in 1990            
One Hour   T   .00           .85   in 2015            
Hourly Rate   .00   .00           4.50   in 2015            
Month Precipitation   3.62   1.30   2.68   +.94   8.73   in 2009   .36   in 1952  
Year Precipitation   22.68   22.32   25.25   -2.57   41.06   in 1998   13.93   in 1957  
Snow   0.0   0.0   0.0   +0.0   0.0   in              
Snow Depth   0   0           0   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  
    July 27, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   88%   86%   92%   -4%   100%   in 2018   66%   in 1983  
Minimum Humidity   46%   44%   62%   -16%   90%   in 2000   35%   in 1987  
Average Humidity   67%   65%   77%   -10%   95%   in 2000   57%   in 1983  
Maximum Barometer   29.96   29.84   30.03   -00.07   30.42   in 1990   29.81   in 1992  
Minimum Barometer   29.89   29.71   29.84   +00.05   30.20   in 2019   29.52   in 1989  
Average Barometer   29.93   29.78   29.93   -00.01   30.26   in 2019   29.67   in 1992  
Average Wind   5.3   7.0   5.7   -0.4   11.5   in 1973   2.6   in 1991  
Direction   NW   W   SSW       SW         NNE        
High Wind Gust   29   28   20   +9   40   in 1927   11   in 1990  
Direction   NNW   SW   S       NE         ENE        
High Heat Index   93   97   81   +12   99   in 1995            
Low Wind Chill                             #N/A   in #N/A  
Maximum Water Temp   74.2   70.7   71.5   +2.7   75.0   in 2007   67.1   in 2001  
Minimum Water Temp   72.9   65.8   68.5   +4.4   72.9   in 2021   64.6   in 1996  
Average Water Temp   73.6   68.3   70.0   +3.6   73.6   in 2007   66.1   in 2001  
Sunrise/ AM Twilight   5:36:17 AM   5:04:46 AM            
Sunset / PM Twilight   8:07:15 PM   8:38:46 PM            
Length Of Day   14:30:58                          
Special Conditions   Fog, Haze                              
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