Portsmouth Rhode Island Weather Almanac  
Saturday, March 4, 2023  
Cloudy, Heavy Rain & Fog AM, Windy, Seasonal Temperatures  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    March 4, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   38   33   42   -4   61   in 1974   23   in 1943  
Minimum Temperature   32   18   27   +5   44   in 2008   2   in 1950  
Average Temperature   35   26   35   +0   50   in 1974   15   in 1950  
 Month Avg Max Temperature   43.5   41.3   41.5   +2.0   56.0   in 1991   28.5   in 1950  
Month Avg Min Temperature   33.0   23.5   27.0   +6.0   37.8   in 1991   11.3   in 1950  
Month Average Temperature   38.3   32.8   34.8   +3.5   47.0   in 1991   20.0   in 1950  
High Heat Index                                      
Low Wind Chill   23   8   16   +7             -13   in 1950  
Heating Degree Days   30   39   30   +0   50   in 1950   15   in 1974  
Month HDD   107   129   121   -14   180   in 1950   72   in 1991  
Season HDD   3417   3699   3947   -530   4948   in 1918   3290   in 2016  
Cooling Degree Days   0   #N/A   #REF!   #REF!   0   in 2023   0   in    
Month CDD                                 in    
Year CDD                                      
Maximum Dew Point   37   21   32   +5   52   in 1974   8   in 2017  
Minimum Dew Point   28   3   17   +11   41   in 2008   -17   in 1950  
Average  Dew Point   33   12   25   +8   44   in 2008   -3   in 1950  
 Month Avg Max Dew Point   37.0   35.0   32.0   +5.0   47.3   in 1991   3.0   in 1980  
Month Avg Min Dew Point   27.5   8.5   16.5   +11.0   35.3   in 1991   -11.5   in 1980  
Month Average Dew Point   32.5   21.8   24.5   +8.0   41.3   in 1991   -4.3   in 1980  
Precipitation   1.15   .00   .13   +1.02   1.94   in 1960            
One Hour   .26   .00           .35   in 1971            
Hourly Rate   .55   .00           .55   in 2023            
Month Precipitation   1.34   .14   .52   +.82   3.02   in 2018   .00   in 2011  
Year Precipitation   10.47   9.53   7.62   +2.85   17.45   in 1979   2.65   in 1980  
Snow   0.0   0.0   0.2   -0.2   9.5   in 1960       in    
Snow Depth   T   0           21   in 2015       in    
Month Snow   0.1   0.0   1.0   -0.9   14.8   in 1960   0.0   in 2022  
Season Snow   9.1   33.7   28.3   -19.2   70.1   in 1996   4.7   in 1998  
    March 4, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   98%   74%   84%   +14%   100%   in 2019   50%   in 1968  
Minimum Humidity   86%   37%   51%   +35%   93%   in 1976   16%   in 1980  
Average Humidity   92%   56%   68%   +24%   97%   in 1976   36%   in 1980  
Maximum Barometer   29.98   30.53   30.09   -00.11   30.79   in 2011   29.42   in 1960  
Minimum Barometer   29.29   30.35   29.80   -00.51   30.61   in 2011   29.00   in 1960  
Average Barometer   29.64   30.44   29.95   -00.31   30.70   in 2011   29.21   in 1960  
Average Wind   14.5   8.0   8.8   +5.7   24.2   in 1971   2.3   in 1976  
Direction   N   SW   WNW       ENE ENE
High Wind Gust   40   28   27   +13   56   in 1971   13   in 1976  
Direction   E   NNW   WNW       W ENE
Maximum Water Temp   41.9   40.3   38.6   +3.3   42.8   in 2012   32.5   in 2015  
Minimum Water Temp   41.2   38.7   36.9   +4.3   42.0   in 2012   31.4   in 2015  
Average Water Temp   41.6   39.5   37.8   +3.7   42.4   in 2012   32.0   in 2015  
Sunrise/ AM Twilight   6:15:16 AM   5:45:27 AM            
Sunset / PM Twilight   5:38:54 PM   6:07:56 PM            
Length Of Day   11:23:38                          
Special Conditions   Fog                                  
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