Portsmouth Rhode Island Weather Almanac
Wednesday, March 10, 2021
Clear and Cooler
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    March 10, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Temperature   48   58   44   +4   67   in 2016   27   in 2003  
Minimum Temperature   31   44   29   +2   51   in 2016   9   in 1984  
Average Temperature   40   51   37   +3   59   in 2016   18   in 1984  
 Month Avg Max Temperature   42.4   51.6   42.4   +0.0   52.8   in 1974   32.0   in 1916  
Month Avg Min Temperature   24.7   34.7   27.9   -3.2   36.7   in 1974   16.8   in 1950  
Month Average Temperature   33.9   43.3   35.5   -1.6   45.1   in 1974   25.7   in 1978  
HDD   25   14   28   -3   47   in 1984   6   in 2016  
Month HDD   311   217   295   +16   393   in 1978   199   in 1974  
Season HDD   3878   3778   4121   -243   5140   in 1918   3422   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   36   47   33   +3   52   in 2002   0   in 1984  
Minimum Dew Point   25   39   18   +7   45   in 2016   -6   in 1987  
Average  Dew Point   31   43   26   +5   48   in 2016   -3   in 1984  
 Month Avg Max Dew Point   25.6   37.6   32.5   -6.9   40.1   in 1998   16.7   in 1978  
Month Avg Min Dew Point   9.1   21.8   17.2   -8.1   30.3   in 1998   -0.8   in 1950  
Month Average Dew Point   17.4   29.7   25.2   -7.9   35.2   in 1998   11.8   in 1978  
Precipitation   .00   T   .14   -.14   2.44   in 1994            
One Hour   .00   T           .29   in 1994            
Hourly Rate   .00   .00           .65   in 2019            
Month Precipitation   .45   .39   1.31   -.86   5.08   in 1994   .00   in 1894  
Year Precipitation   5.95   6.20   8.41   -2.46   18.83   in 1979   2.98   in 1980  
Snow   0.0   0.0   0.2   -0.2   5.3   in 2017            
Snow Depth   0   0           15   in 2015            
Month Snow   0.0   0.6   2.2   -2.2   18.4   in 1941   0.0   in 2021  
Season Snow   27.7   12.8   29.5   -1.8   74.5   in 1996   4.7   in 1998  
    March 10, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   91%   89%   83%   +8%   100%   in 2019   45%   in 1987  
Minimum Humidity   50%   61%   48%   +2%   96%   in 1994   19%   in 1995  
Average Humidity   71%   75%   66%   +5%   98%   in 1994   37%   in 1987  
Maximum Barometer   30.57   30.22   30.14   +00.43   30.88   in 1996   29.37   in 1969  
Minimum Barometer   30.42   29.90   29.82   +00.60   30.68   in 1996   29.09   in 1969  
Average Barometer   30.50   30.06   29.98   +00.51   30.78   in 1996   29.23   in 1969  
Average Wind   5.6   8.5   8.4   -2.8   17.2   in 1987   2.9   in 2015  
Direction   SSE   SSW   WNW       N         S        
High Wind Gust   18   29   27   -9   52   in 1974   12   in 1952  
Direction   SW   SSW   NW       NW         SW        
High Heat Index                                      
Wind Chill   30   40   18   +12             -8   in 1984  
Maximum Water Temp   40.0   39.4   39.3   +0.7   44.0   in 2012   35.0   in 2003  
Minimum Water Temp   37.4   37.6   37.6   -0.2   42.3   in 1998   33.0   in 2005  
Average Water Temp   38.7   38.5   38.5   +0.2   43.1   in 2012   34.3   in 2005  
Sunrise/ AM Twilight   6:03:13 AM   5:35:43 AM            
Sunset / PM Twilight   5:47:11 PM   6:14:42 PM            
Length Of Day   11:43:58                          
Special Conditions   None                              
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