Portsmouth Rhode Island Weather Almanac
Tuesday, January 12, 2021
Clear early, Partly Cloudy day to Mostly Cloudy PM, Warmer
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    January 12, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Temperature   43   66   38   +5   66   in 2020   14   in 1982  
Minimum Temperature   28   40   24   +4   46   in 2017   -4   in 1982  
Average Temperature   36   53   31   +5   53   in 2020   5   in 1982  
 Month Avg Max Temperature   40.1   45.2   39.3   +0.8   50.3   in 2000   23.8   in 1981  
Month Avg Min Temperature   29.0   33.1   25.4   +3.6   36.9   in 2007   6.7   in 1981  
Month Average Temperature   34.5   39.1   32.4   +2.2   43.0   in 2007   15.2   in 1981  
Precipitation   .00   .17   .12   -.12   1.69   in 2018            
One Hour   .00   .10           .46   in 2018            
Hourly Rate   .00   1.75           3.13   in 2018            
Month Precipitation   .45   .73   1.46   -1.01   4.52   in 1979   .09   in 1984  
Year Precipitation   .45   .73   1.46   -1.01   4.52   in 1979   .09   in 1984  
Snow   0.0   0.0   0.3   -0.3   8.2   in 2011            
Month Snow   0.3   1.5   3.6   -3.3   25.8   in 1996   0.0   in 2007  
Season Snow   8.3   9.9   10.7   -2.4   41.6   in 1996   T   in 2000  
Snow Depth   0   0           21   in 1996            
HDD   29   12   34   -5   60   in 1982   12   in 2020  
Month HDD   363   308   392   -29   594   in 1981   262   in 2007  
Season HDD   2011   2188   2260   -249   2970   in 1918   1678   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   28   56   31   -3   56   in 2020   -10   in 1981  
Minimum Dew Point   23   31   15   +8   44   in 2017   -20   in 1981  
Average  Dew Point   26   44   23   +3   48   in 2018   -15   in 1981  
 Month Avg Max Dew Point   26.3   32.4   31.8   -5.6   38.1   in 1950   10.6   in 1981  
Month Avg Min Dew Point   22.0   25.0   16.0   +6.0   27.7   in 1998   -10.1   in 1981  
Month Average Dew Point   24.3   32.2   23.9   +0.4   34.7   in 2007   0.3   in 1981  
Maximum Humidity   84%   96%   89%   -5%   100%   in 2018   43%   in 1968  
Minimum Humidity   50%   52%   62%   -12%   97%   in 2018   20%   in 1992  
Average Humidity   67%   74%   75%   -8%   99%   in 2018   34%   in 1968  
Maximum Barometer   30.13   30.42   30.21   -00.08   30.86   in 1984   29.60   in 1990  
Minimum Barometer   30.05   29.86   29.83   +00.22   30.43   in 1968   28.90   in 1987  
Average Barometer   30.09   30.14   30.02   +00.07   30.55   in 1984   29.32   in 1987  
Average Wind   5.5   11.1   8.0   -2.5   16.4   in 2011   2.1   in 1955  
Direction   NW   SSW   NW       W         NNW        
High Wind Gust   19   36   28   -9   51   in 1986   7   in 1993  
Direction   NW   S   WNW       SW         ENE        
High Heat Index                                      
Wind Chill   24   36   20   +4             -29   in 1982  
Maximum Water Temp   44.1   41.0   41.4   +2.7   49.3   in 2012   36.3   in 2019  
Minimum Water Temp   41.4   38.5   39.2   +2.2   45.6   in 2012   33.6   in 2019  
Average Water Temp   42.8   39.8   40.2   +2.6   47.5   in 2012   35.0   in 2019  
Sunrise/ AM Twilight   7:09:55 AM   6:39:23 AM            
Sunset / PM Twilight   4:38:03 PM   5:08:35 PM            
Length Of Day   9:28:08                          
Special Conditions   None                              
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