Portsmouth Rhode Island Weather Almanac
Thursday, March 4, 2021
Partly Cloudy early, Mostly Cloudy Day to Clear PM, Windy, Seasonal Temps
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    March 4, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Temperature   43   54   42   +1   61   in 1974   23   in 1943  
Minimum Temperature   26   43   27   -1   44   in 2008   2   in 1950  
Average Temperature   35   49   35   +0   50   in 1974   15   in 1950  
 Month Avg Max Temperature   41.8   49.8   41.5   +0.3   56.0   in 1991   28.5   in 1950  
Month Avg Min Temperature   23.5   33.3   27.0   -3.5   37.8   in 1991   11.3   in 1950  
Month Average Temperature   33.0   41.8   34.8   -1.8   47.0   in 1991   20.0   in 1950  
HDD   30   16   30   +0   50   in 1950   15   in 1974  
Month HDD   128   93   121   +7   180   in 1950   72   in 1991  
Season HDD   3695   3654   3947   -252   4948   in 1918   3290   in 2016  
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   31   48   32   -1   52   in 1974   8   in 2017  
Minimum Dew Point   5   25   17   -12   41   in 2008   -17   in 1950  
Average  Dew Point   18   37   25   -7   44   in 2008   -3   in 1950  
 Month Avg Max Dew Point   29.3   38.3   32.0   -2.8   47.3   in 1991   3.0   in 1980  
Month Avg Min Dew Point   4.5   22.0   16.5   -12.0   35.3   in 1991   -11.5   in 1980  
Month Average Dew Point   16.9   30.1   24.5   -7.6   41.3   in 1991   -4.3   in 1980  
Precipitation   .00   .08   .13   -.13   1.94   in 1960            
One Hour   .00   .07           .35   in 1971            
Hourly Rate   .00   .18           .18   in 2020            
Month Precipitation   .45   .31   .52   -.07   3.02   in 2018   .00   in 2011  
Year Precipitation   5.95   6.12   7.62   -1.67   17.45   in 1979   2.65   in 1980  
Snow   0.0   0.0   0.2   -0.2   9.5   in 1960            
Snow Depth   0   0           21   in 2015            
Month Snow   0.0   0.0   1.0   -1.0   14.8   in 1960   0.0   in 2021  
Season Snow   27.7   12.2   28.3   -0.6   70.1   in 1996   4.7   in 1998  
    March 4, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   80%   96%   84%   -4%   100%   in 2019   50%   in 1968  
Minimum Humidity   36%   35%   51%   -15%   93%   in 1976   16%   in 1980  
Average Humidity   58%   66%   68%   -10%   97%   in 1976   36%   in 1980  
Maximum Barometer   29.78   29.83   30.09   -00.31   30.79   in 2011   29.42   in 1960  
Minimum Barometer   29.65   29.37   29.80   -00.15   30.61   in 2011   29.00   in 1960  
Average Barometer   29.72   29.60   29.94   -00.23   30.70   in 2011   29.21   in 1960  
Average Wind   9.4   11.1   8.7   +0.7   24.2   in 1971   2.3   in 1976  
Direction   WNW   W   WNW       ENE         ENE        
High Wind Gust   36   33   27   +9   56   in 1971   13   in 1976  
Direction   NW   W   WNW       W         ENE        
High Heat Index                                      
Wind Chill   14   36   16   -2             -13   in 1950  
Maximum Water Temp   38.1   38.5   38.4   -0.3   42.8   in 2012   32.5   in 2015  
Minimum Water Temp   37.2   36.9   36.7   +0.5   42.0   in 2012   31.4   in 2015  
Average Water Temp   37.7   37.7   37.6   +0.1   42.4   in 2012   32.0   in 2015  
Sunrise/ AM Twilight   6:13:02 AM   5:45:27 AM            
Sunset / PM Twilight   5:40:20 PM   6:07:56 PM            
Length Of Day   11:27:18                          
Special Conditions   None                              
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