Portsmouth Rhode Island Weather Almanac  
Thursday, July 15, 2021  
Cloudy, Dense Fog/Haze early, Clear day to Partly Cloudy PM, Much Warmer & Muggy  
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    July 15, 2021   Record   Record  
Observed Daily Data   2021   2020   Norm   Depart   Highest   Lowest  
Maximum Temperature   86   77   80   +6   91   in 2013   64   in 1926  
Minimum Temperature   71   60   65   +6   75   in 2013   54   in 1999  
Average Temperature   79   69   73   +6   83   in 2013   62   in 1926  
 Month Avg Max Temperature   77.1   80.7   79.5   -2.4   85.5   in 1993   73.1   in 1914  
Month Avg Min Temperature   63.8   65.5   64.1   -0.3   70.5   in 2013   57.5   in 1962  
Month Average Temperature   70.7   73.4   72.1   -1.4   76.3   in 2013   66.1   in 1914  
HDD   0   0   0   +0   3   in 1926   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   14   4   8   +6   18   in 2013   0   in 1961  
Month CDD   95   126   107   -12   169   in 2013   31   in 2009  
Year CDD   257   259   200   +57   302   in 2010   65   in 2009  
Maximum Dew Point   74   65   69   +5   77   in 1997   56   in 1981  
Minimum Dew Point   69   56   60   +9   70   in 2014   43   in 1954  
Average  Dew Point   72   61   65   +7   73   in 2013   53   in 1991  
 Month Avg Max Dew Point   70.0   70.6   68.1   +1.9   73.9   in 2013   59.0   in 1978  
Month Avg Min Dew Point   61.3   63.0   59.5   +1.9   68.2   in 2013   49.7   in 1962  
Month Average Dew Point   65.7   66.8   63.8   +1.9   71.1   in 2013   54.7   in 1978  
Precipitation   .00   .00   .09   -.09   1.83   in 1973            
One Hour   .00   .00           1.33   in 2015            
Hourly Rate   .00   .00           10.29   in 2015            
Month Precipitation   3.46   .94   1.55   +1.91   4.93   in 1959   T   in 1982  
Year Precipitation   22.52   21.96   24.12   -1.60   40.76   in 1998   13.52   in 1957  
Snow   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 15, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   99%   93%   93%   +6%   100%   in 2016   68%   in 1966  
Minimum Humidity   68%   61%   59%   +9%   92%   in 2014   29%   in 1991  
Average Humidity   84%   77%   76%   +7%   96%   in 2014   52%   in 1991  
Maximum Barometer   30.10   30.27   30.02   +00.08   30.31   in 1975   29.68   in 2004  
Minimum Barometer   30.00   30.08   29.83   +00.17   30.12   in 1959   29.44   in 1954  
Average Barometer   30.05   30.18   29.93   +00.13   30.21   in 1975   29.57   in 1954  
Average Wind   5.1   4.4   6.0   -0.9   13.9   in 2000   1.8   in 2005  
Direction   SW   NE   SW       ESE         SSE        
High Wind Gust   21   21   21   -0   38   in 1995   9   in 1997  
Direction   SW   ENE   SW       WNW         ESE        
High Heat Index   92   78   82   +10   101   in 1997            
Low Wind Chill                             #N/A   in #N/A  
Maximum Water Temp   71.6   66.0   70.4   +1.2   75.0   in 2013   66.0   in 2020  
Minimum Water Temp   69.4   64.2   66.6   +2.8   72.3   in 1997   62.1   in 2003  
Average Water Temp   70.5   65.1   68.5   +2.0   73.3   in 1997   65.1   in 2020  
Sunrise/ AM Twilight   5:25:30 AM   4:52:48 AM            
Sunset / PM Twilight   8:17:12 PM   8:49:54 PM            
Length Of Day   14:51:42                          
Special Conditions   Dense Fog, Haze                          
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