Portsmouth Rhode Island Weather Almanac
Saturday, April 10, 2021
Cloudy, Dense Fog early then Partly Cloudy, Dense Fog Late and Warm
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    April 10, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Temperature   63   51   53   +10   76   in 1922   37   in 1996  
Minimum Temperature   42   38   38   +4   47   in 1980   26   in 1997  
Average Temperature   53   45   46   +7   59   in 1922   34   in 1996  
 Month Avg Max Temperature   56.8   52.5   51.8   +5.0   62.8   in 2010   41.2   in 2003  
Month Avg Min Temperature   36.9   38.4   36.7   +0.2   44.2   in 2010   27.7   in 1982  
Month Average Temperature   47.1   45.7   44.6   +2.5   53.7   in 2010   36.6   in 2003  
HDD   12   20   19   -7   31   in 1996   6   in 1922  
Month HDD   179   193   204   -25   284   in 2003   113   in 2010  
Season HDD   4499   4418   4854   -355   5891   in 1918   4038   in 2012  
CDD   0   0   0   +0   0   in     0   in    
Month CDD           0   +0   0   in     0   in    
Year CDD           0   +0   0   in     0   in    
Maximum Dew Point   54   37   41   +13   58   in 1993   12   in 1997  
Minimum Dew Point   42   27   28   +14   46   in 1980   3   in 1997  
Average  Dew Point   48   32   34   +14   51   in 1993   8   in 1997  
 Month Avg Max Dew Point   40.6   41.0   39.7   +0.9   50.9   in 2010   25.9   in 1965  
Month Avg Min Dew Point   23.7   30.5   26.2   -2.5   38.9   in 2010   10.3   in 1982  
Month Average Dew Point   32.2   35.8   32.9   -0.8   44.9   in 2010   19.1   in 1982  
Precipitation   .00   .15   .14   -.14   2.93   in 1983            
One Hour   .00   .10           .60   in 1980            
Hourly Rate   .00   .29           2.08   in 2013            
Month Precipitation   .77   1.45   1.47   -.70   5.57   in 1983   .03   in 1963  
Year Precipitation   9.19   12.21   12.93   -3.74   24.84   in 1983   6.44   in 2012  
Snow   0.0   T   0.0   +0.0   3.6   in 1996            
Snow Depth   0   0           8   in 1917            
Month Snow   0.0   T   0.5   -0.5   9.6   in 1996   0.0   in 2021  
Season Snow   27.7   12.9   33.5   -5.8   84.1   in 1996   5.0   in 1998  
    April 10, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   98%   90%   82%   +16%   100%   in 2015   42%   in 1997  
Minimum Humidity   69%   44%   44%   +25%   96%   in 2015   13%   in 1997  
Average Humidity   84%   67%   63%   +21%   98%   in 2015   28%   in 1997  
Maximum Barometer   30.12   29.60   30.05   +00.07   30.73   in 1954   29.41   in 1963  
Minimum Barometer   29.78   29.20   29.75   +00.03   30.12   in 2018   29.02   in 1986  
Average Barometer   29.95   29.40   29.90   +00.05   30.30   in 2002   29.32   in 1986  
Average Wind   7.8   12.5   8.5   -0.7   16.7   in 1988   2.0   in 1966  
Direction   SW   W   W       NNW         WNW        
High Wind Gust   30   35   28   +2   44   in 1969   11   in 2018  
Direction   WSW   WNW   WNW       SW         SSE        
High Heat Index                                      
Wind Chill   39   31   29   +10             14   in 1997  
Maximum Water Temp   46.3   40.2   45.2   +1.1   52.3   in 2010   40.2   in 2020  
Minimum Water Temp   44.9   39.3   42.4   +2.5   49.1   in 2010   37.9   in 2003  
Average Water Temp   45.6   39.8   43.8   +1.8   50.7   in 2010   39.6   in 2003  
Sunrise/ AM Twilight   6:11:02 AM   5:42:36 AM            
Sunset / PM Twilight   7:21:22 PM   7:49:48 PM            
Length Of Day   13:08:18                          
Special Conditions   Dense Fog                              
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