Portsmouth Rhode Island Weather Almanac
Monday, March 29, 2021
Mostly Cloudy and Light Rain Early then Clear, Windy and Warm
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    March 29, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Temperature   52   46   50   +2   73   in 1946   28   in 1919  
Minimum Temperature   39   42   34   +5   46   in 1998   5   in 1923  
Average Temperature   46   44   42   +4   59   in 1910   18   in 1923  
 Month Avg Max Temperature   49.1   51.3   45.3   +3.8   52.2   in 1946   34.9   in 1916  
Month Avg Min Temperature   30.9   35.7   30.4   +0.5   37.6   in 2012   22.6   in 1916  
Month Average Temperature   40.2   43.7   38.1   +2.1   45.1   in 2012   29.0   in 1916  
HDD   19   21   23   -4   47   in 1923   6   in 1910  
Month HDD   718   617   780   -62   1043   in 1916   576   in 2012  
Season HDD   4285   4178   4606   -321   5652   in 1918   3817   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   49   44   37   +12   56   in 1989   13   in 1966  
Minimum Dew Point   21   41   24   -3   44   in 1998   -4   in 1974  
Average  Dew Point   35   43   31   +4   50   in 1998   7   in 1974  
 Month Avg Max Dew Point   34.5   39.9   34.4   +0.1   41.9   in 2012   24.3   in 1960  
Month Avg Min Dew Point   17.8   23.8   19.9   -2.1   27.6   in 2012   11.2   in 1960  
Month Average Dew Point   26.1   31.9   27.4   -1.3   34.8   in 2012   17.7   in 1960  
Precipitation   .11   .60   .14   -.03   1.80   in 2010            
One Hour   .06   .12           .65   in 1997            
Hourly Rate   .16   .43           1.55   in 2014            
Month Precipitation   2.88   4.95   4.08   -1.20   9.61   in 2010   .22   in 1915  
Year Precipitation   8.38   10.76   11.18   -2.80   19.47   in 1979   5.98   in 2012  
Snow   0.0   0.0   0.1   -0.1   5.4   in 1970            
Snow Depth   0   0           2   in 2015            
Month Snow   T   0.7   5.5   -5.5   31.6   in 1956   0.0   in 1903  
Season Snow   27.7   12.9   32.8   -5.1   78.0   in 2005   5.0   in 1998  
    March 29, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   94%   96%   86%   +8%   100%   in 2018   36%   in 2007  
Minimum Humidity   35%   89%   50%   -15%   92%   in 2009   14%   in 2007  
Average Humidity   65%   93%   68%   -3%   96%   in 1993   25%   in 2007  
Maximum Barometer   30.26   30.15   30.10   +00.16   30.74   in 1990   29.46   in 1984  
Minimum Barometer   29.45   29.88   29.81   -00.36   30.43   in 2004   28.96   in 1984  
Average Barometer   29.86   30.02   29.96   -00.10   30.53   in 1990   29.21   in 1984  
Average Wind   12.6   14.5   8.2   +4.4   22.7   in 1984   3.9   in 2018  
Direction   WNW   E   SSW       ENE         S        
High Wind Gust   44   30   26   +18   52   in 1984   13   in 1973  
Direction   WNW   E   SSW       NE         SSE        
High Heat Index                                      
Wind Chill   35   33   27   +8             5   in 1966  
Maximum Water Temp   42.7   39.8   42.4   +0.3   46.8   in 2012   38.7   in 2015  
Minimum Water Temp   40.8   38.8   40.1   +0.7   45.7   in 2012   35.8   in 2015  
Average Water Temp   41.8   39.3   41.2   +0.5   46.3   in 2012   37.3   in 2015  
Sunrise/ AM Twilight   6:31:14 AM   6:03:27 AM            
Sunset / PM Twilight   7:08:07 PM   7:35:54 PM            
Length Of Day   12:36:53                          
Special Conditions   None                              
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