Portsmouth Rhode Island Weather Almanac
Tuesday, April 13, 2021
Partly Cloudy early, Cloudy Day to Partly Cloudy PM, Warmer
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    April 13, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Temperature   58   56   54   +4   78   in 1977   38   in 1929  
Minimum Temperature   40   50   39   +1   51   in 2002   26   in 1956  
Average Temperature   49   53   47   +2   60   in 1977   35   in 1929  
 Month Avg Max Temperature   56.2   53.1   52.3   +3.9   62.3   in 2010   43.6   in 2003  
Month Avg Min Temperature   37.8   38.8   37.1   +0.8   43.7   in 2010   28.5   in 1982  
Month Average Temperature   47.3   46.2   45.0   +2.3   53.2   in 2010   37.9   in 1982  
HDD   16   12   18   -2   30   in 1929   5   in 1977  
Month HDD   230   245   260   -30   352   in 1982   153   in 2010  
Season HDD   4550   4470   4910   -360   5984   in 1918   4087   in 2012  
CDD   0   0   0   +0   0   in     0   in    
Month CDD   0   0   0   +0   0   in     0   in    
Year CDD   0   0   0   +0   0   in     0   in    
Maximum Dew Point   43   55   42   +1   56   in 2019   18   in 1992  
Minimum Dew Point   37   48   29   +8   48   in 2020   3   in 1992  
Average  Dew Point   40   52   35   +5   52   in 2019   11   in 1992  
 Month Avg Max Dew Point   42.0   42.2   40.2   +1.8   49.1   in 2010   29.0   in 1965  
Month Avg Min Dew Point   27.1   30.9   26.7   +0.4   36.9   in 2010   13.2   in 1982  
Month Average Dew Point   34.5   36.5   33.4   +1.2   43.0   in 2010   21.7   in 1982  
Precipitation   .00   1.35   .14   -.14   2.55   in 1913            
One Hour   .00   .26           .40   in 2004            
Hourly Rate   .00   2.82           4.30   in 2011            
Month Precipitation   .85   2.80   1.89   -1.04   5.72   in 1983   .03   in 1963  
Year Precipitation   9.27   13.56   13.35   -4.08   24.99   in 1983   6.57   in 2012  
Snow   0.0   0.0   0.0   +0.0   0.4   in 1950            
Snow Depth   0   0           T   in 1958            
Month Snow   0.0   0.0   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 13, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   89%   95%   84%   +5%   100%   in 2019   43%   in 1976  
Minimum Humidity   56%   84%   49%   +7%   93%   in 2004   13%   in 1963  
Average Humidity   73%   90%   67%   +6%   97%   in 2004   33%   in 1992  
Maximum Barometer   30.06   30.18   30.13   -00.07   30.67   in 1991   29.43   in 1953  
Minimum Barometer   29.93   29.55   29.86   +00.07   30.39   in 2000   29.19   in 1965  
Average Barometer   30.00   29.87   29.99   +00.00   30.47   in 2000   29.33   in 1953  
Average Wind   7.3   14.6   7.7   -0.4   19.9   in 1987   3.6   in 1984  
Direction   NNE   S   S       NNE         ESE        
High Wind Gust   28   48   26   +2   48   in 2020   15   in 1970  
Direction   NNE   SSE   NNE       SSE         S        
High Heat Index                                      
Wind Chill   35   44   31   +4             14   in 1956  
Maximum Water Temp   46.8   42.0   45.9   +0.9   53.3   in 2010   42.0   in 2020  
Minimum Water Temp   45.5   41.0   43.2   +2.3   47.7   in 2012   38.8   in 2003  
Average Water Temp   46.2   41.5   44.5   +1.6   49.7   in 2010   40.9   in 2003  
Sunrise/ AM Twilight   6:06:15 AM   5:37:37 AM            
Sunset / PM Twilight   7:24:37 PM   7:53:16 PM            
Length Of Day   13:16:21                          
Special Conditions   None                              
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