Portsmouth Rhode Island Weather Almanac
Tuesday, March 30, 2021
Clear and Cooler
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    March 30, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Temperature   50   46   50   +0   72   in 1977   37   in 1970  
Minimum Temperature   31   39   35   -4   48   in 1945   20   in 1915  
Average Temperature   41   43   43   -2   59   in 1945   29   in 1970  
 Month Avg Max Temperature   49.1   51.2   45.4   +3.7   52.3   in 1946   35.3   in 1916  
Month Avg Min Temperature   30.9   35.8   30.6   +0.3   37.5   in 2012   23.1   in 1916  
Month Average Temperature   40.3   43.7   38.3   +2.0   45.1   in 2012   29.4   in 1916  
HDD   24   22   22   +2   36   in 1970   6   in 1945  
Month HDD   742   639   802   -60   1067   in 1916   596   in 2012  
Season HDD   4309   4200   4628   -319   5674   in 1918   3837   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   42   41   38   +4   58   in 1977   11   in 1983  
Minimum Dew Point   23   36   24   -1   41   in 2010   1   in 1983  
Average  Dew Point   33   39   31   +2   49   in 1977   6   in 1983  
 Month Avg Max Dew Point   34.7   40.0   34.5   +0.2   41.8   in 2012   25.1   in 1960  
Month Avg Min Dew Point   18.0   24.2   20.0   -2.0   27.5   in 2010   11.2   in 1950  
Month Average Dew Point   26.4   32.1   27.5   -1.2   34.6   in 2012   18.6   in 1960  
Precipitation   .00   T   .14   -.14   4.54   in 2001            
One Hour   .00   T           .78   in 2014            
Hourly Rate   .00   .00           2.82   in 2014            
Month Precipitation   2.88   4.95   4.22   -1.34   13.23   in 2010   .32   in 1915  
Year Precipitation   8.38   10.76   11.32   -2.94   20.08   in 2010   5.98   in 2012  
Snow   0.0   0.0   0.1   -0.1   2.6   in 1922            
Snow Depth   0   0           5   in 1970            
Month Snow   T   0.7   5.6   -5.6   31.6   in 1956   0.0   in 1903  
Season Snow   27.7   12.9   32.9   -5.2   78.0   in 2005   5.0   in 1998  
    March 30, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   87%   96%   86%   +1%   100%   in 2018   44%   in 1983  
Minimum Humidity   37%   81%   53%   -16%   96%   in 2014   12%   in 2007  
Average Humidity   62%   89%   70%   -8%   98%   in 2014   31%   in 1983  
Maximum Barometer   30.47   30.01   30.09   +00.38   30.72   in 2008   29.38   in 1953  
Minimum Barometer   30.26   29.88   29.82   +00.44   30.52   in 2008   29.15   in 1975  
Average Barometer   30.37   29.95   29.95   +00.41   30.62   in 2008   29.29   in 1953  
Average Wind   6.0   14.0   8.4   -2.4   15.8   in 2001   3.5   in 1973  
Direction   S   NNE   S       ENE         S        
High Wind Gust   20   29   27   -7   43   in 1984   12   in 1973  
Direction   SW   N   N       N         SSE        
High Heat Index                                      
Wind Chill   30   31   27   +3             9   in 1983  
Maximum Water Temp   42.9   39.3   42.6   +0.3   47.7   in 2012   37.9   in 2015  
Minimum Water Temp   41.1   38.5   40.2   +0.9   45.5   in 2012   36.9   in 2015  
Average Water Temp   42.0   38.9   41.5   +0.5   46.6   in 2012   37.4   in 2015  
Sunrise/ AM Twilight   6:29:33 AM   6:01:43 AM            
Sunset / PM Twilight   7:09:12 PM   7:37:02 PM            
Length Of Day   12:39:39                          
Special Conditions   None                              
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