Portsmouth Rhode Island Weather Almanac
Tuesday, March 9, 2021
Cloudy early, Partly Cloudy Day to Clear PM, Much Warmer
Climate Normal Period   Climate Record Period  
1991- 2020   1893 - 2021  
    March 9, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Temperature   61   60   43   +18   61   in 2021   23   in 1996  
Minimum Temperature   33   42   29   +4   45   in 1921   7   in 2007  
Average Temperature   47   51   36   +11   51   in 2020   17   in 1996  
 Month Avg Max Temperature   41.8   50.9   42.2   -0.4   53.8   in 1974   31.2   in 1916  
Month Avg Min Temperature   24.0   33.7   27.8   -3.8   37.6   in 1974   16.8   in 1950  
Month Average Temperature   33.2   42.4   35.3   -2.1   46.0   in 1974   24.8   in 1978  
HDD   18   14   29   -11   48   in 1996   14   in 2020  
Month HDD   286   203   267   +19   362   in 1978   171   in 1974  
Season HDD   3853   3764   4093   -240   5114   in 1905   3416   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   32   41   33   -1   51   in 1998   4   in 1991  
Minimum Dew Point   24   30   18   +6   41   in 2002   -15   in 2007  
Average  Dew Point   28   36   26   +2   46   in 2002   -1   in 1991  
 Month Avg Max Dew Point   24.4   36.6   32.4   -8.0   40.9   in 2008   15.2   in 1978  
Month Avg Min Dew Point   7.3   19.9   17.1   -9.8   32.0   in 1998   -0.9   in 1950  
Month Average Dew Point   15.9   28.2   25.1   -9.2   35.6   in 1998   10.2   in 1978  
Precipitation   .00   .00   .13   -.13   1.95   in 1998            
One Hour   .00   .00           .41   in 1998            
Hourly Rate   .00   .00           .26   in 2012            
Month Precipitation   .45   .39   1.17   -.72   4.38   in 2018   .00   in 1894  
Year Precipitation   5.95   6.20   8.27   -2.32   18.83   in 1979   2.98   in 1980  
Snow   0.0   0.0   0.2   -0.2   6.1   in 1928            
Snow Depth   0   0           19   in 2015            
Month Snow   0.0   0.6   2.0   -2.0   18.4   in 1941   0.0   in 2021  
Season Snow   27.7   12.8   29.3   -1.6   74.5   in 1996   4.7   in 1998  
    March 9, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   79%   83%   85%   -6%   100%   in 2003   40%   in 1991  
Minimum Humidity   29%   36%   48%   -19%   93%   in 1998   16%   in 1991  
Average Humidity   54%   60%   66%   -12%   97%   in 1998   28%   in 1991  
Maximum Barometer   30.44   30.34   30.16   +00.28   31.01   in 1942   29.19   in 1957  
Minimum Barometer   30.19   30.20   29.79   +00.40   30.58   in 2011   28.93   in 1957  
Average Barometer   30.32   30.27   29.97   +00.34   30.64   in 2011   29.06   in 1957  
Average Wind   8.2   7.7   8.5   -0.3   16.9   in 1950   2.6   in 2004  
Direction   NW   SSW   NW       SE         SE        
High Wind Gust   25   26   27   -2   48   in 2017   11   in 2004  
Direction   WSW   SSW   NW       W         SW        
High Heat Index                                      
Wind Chill   30   38   18   +12             -8   in 2005  
Maximum Water Temp   39.3   38.7   39.0   +0.3   45.2   in 2012   32.2   in 2017  
Minimum Water Temp   36.4   36.5   37.3   -0.9   43.7   in 2012   32.5   in 2005  
Average Water Temp   37.9   37.6   38.4   -0.5   44.5   in 2012   33.6   in 2005  
Sunrise/ AM Twilight   6:04:53 AM   5:37:21 AM            
Sunset / PM Twilight   5:46:03 PM   6:13:35 PM            
Length Of Day   11:41:10                          
Special Conditions   None                              
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