Portsmouth Rhode Island Weather Almanac
Tuesday, August 4, 2020
Mostly Cloudy early, Cloudy Day to Partly Cloudy PM, TS Isias Passes to the West, Gusty Winds, Very Muggy
Climate Normal Period Climate Record Period  
1981- 2010   1893 - 2020  
    August 4, 2020     Record Record
Observed Daily Data   Observed   2019   Normal   Depart   Highest Lowest
Maximum Temperature   83   87   79   +4   92   in 1944   65   in 1903  
Minimum Temperature   71   69   65   +6   73   in 2012   53   in 1966  
Average Temperature   77   78   72   +5   81   in 1926   62   in 1964  
Precipitation   .12   .01   .12   .00   1.89   in 1915            
One Hour   .12   .01           1.13   in 2018            
Snow   0.0   0.0   0.0   +0.0   0.0   in              
Snow Depth   0   0           0   in            
HDD   0   0   0   +0   3   in 1964   0   in 2020  
CDD   12   13   8   +4   16   in 1926   0   in 1964  
Maximum Dew Point   78   70   69   +9   78   in 2020   50   in 1964  
Minimum Dew Point   68   63   61   +7   72   in 2012   41   in 1953  
Average  Dew Point   73   67   65   +8   75   in 2012   48   in 1964  
Maximum Humidity   94%   95%   94%   -0%   100%   in 2018   72%   in 1956  
Minimum Humidity   81%   44%   61%   +20%   90%   in 2003   29%   in 1953  
Average Humidity   88%   70%   78%   +10%   95%   in 2003   55%   in 1966  
Maximum Barometer   30.07   29.95   30.02   +00.05   30.30   in 1988   29.66   in 1957  
Minimum Barometer   29.78   29.85   29.84   -00.06   30.17   in 1998   29.45   in 1987  
Average Barometer   29.93   29.90   29.93   -00.01   30.21   in 1998   29.61   in 1957  
Average Wind   7.6   4.3   5.8   +1.8   14.0   in 1974   2.3   in 1996  
Direction   SSE   SSW   SSW       SW         SSE        
High Wind Gust   42   15   21   +21   42   in 2020   10   in 1998  
Direction   S   SSW   SSW       S         SSE        
High Heat Index   91   90   82   +9   94   in 2012            
Wind Chill                             #N/A   in #N/A  
Maximum Water Temp   68.0   74.4   72.6   -4.6   77.0   in 2006   68.0   in 2020  
Minimum Water Temp   65.5   71.5   68.6   -3.1   72.9   in 2009   63.9   in 2001  
Average Water Temp   66.8   73.0   70.6   -3.9   73.7   in 2002   66.8   in 2001  
Sunrise/ AM Twilight   5:43:51 AM   5:13:09 AM            
Sunset / PM Twilight   7:58:42 PM   8:29:24 PM            
Length Of Day   14:14:51                          
Special Conditions   Fog, Haze                              
Comments   TS Isias makes pass through eastern NY late afternoon  
    August 4, 2020     Record Record
Month-to-Date Summary   Observed   2019   Normal Depart Highest Lowest
 Avg Maximum Temperature   85.8   85.0   79.0   +6.8   91.3   in 1975   72.0   in 1964  
Avg Minimum Temperature   70.3   66.8   65.5   +4.8   72.8   in 1979   54.8   in 1953  
Average Temperature   78.0   76.0   72.3   +5.8   81.8   in 1975   63.8   in 1964  
Total Precipitation   .12   .00   .45   -.33   2.92   in 1915   .00   in 2017  
Total Snow   0.0   0.0   0.0   +0.0   0.0   in     0.0   in    
Total HDD   0   0   0   +0   8   in 1964   0   in 2020  
Total CDD   52   44   32   +20   67   in 1975   1   in 1953  
Avg Maximum Dew Point   75.8   69.0   69.0   +6.7   76.5   in 2006   56.0   in 1964  
Avg Minimum Dew Point   66.3   59.0   61.3   +5.0   70.8   in 1979   45.8   in 1953  
Average  Dew Point   71.0   64.0   65.1   +5.9   72.5   in 1979   51.4   in 1964  
    August 4, 2020     Record Record
Year-to-Date Summary   Observed   2019   Normal Depart Highest Lowest
Total Precipitation   22.50   35.24   28.26   -5.76   41.55   in 1998   14.69   in 1957  
Total Snow (since Jul 1 20)   0.0   0.0   0.0   +0.0   0.0   in     0.0   in    
Total HDD (since Jul 1 20)   0   0   3   -3   8   in 1964   0   in 2020  
Total CDD (since Jan 1)   516   464   336   +180   516   in 2020   163   in 1902  
                             
Hour-by-Hour Weather For August 4, 2020  
Climate Weather for August 4  
Weather History For August 4  
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