Portsmouth Rhode Island Weather Almanac
Monday, January 11, 2021
Partly Cloudy early, Cloudy Day to Mostly Cloudy PM, Light Winds and Cooler
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    January 11, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Temperature   38   56   38   +0   56   in 2020   11   in 1982  
Minimum Temperature   24   48   25   -1   48   in 2020   -2   in 1893  
Average Temperature   31   52   32   -1   52   in 2020   6   in 1982  
 Month Avg Max Temperature   39.8   43.3   39.4   +0.5   51.0   in 2000   24.5   in 1981  
Month Avg Min Temperature   29.1   32.5   25.5   +3.6   36.7   in 2007   7.5   in 1981  
Month Average Temperature   34.5   37.9   32.5   +2.0   43.0   in 2007   16.0   in 1981  
Precipitation   .00   .01   .12   -.12   1.00   in 1922            
One Hour   .00   .01           .29   in 1983            
Hourly Rate   .00   .00           3.37   in 2008            
Month Precipitation   .45   .56   1.34   -.89   4.52   in 1979   .09   in 1984  
Year Precipitation   .45   .56   1.34   -.89   4.52   in 1979   .09   in 1984  
Snow   0.0   0.0   0.3   -0.3   7.8   in 1927            
Month Snow   0.3   1.5   3.3   -3.0   25.7   in 1996   0.0   in 2007  
Season Snow   8.3   9.9   10.4   -2.1   41.5   in 1996   T   in 2000  
Snow Depth   0   0           22   in 1996            
HDD   34   13   33   +1   59   in 1982   13   in 2020  
Month HDD   334   296   358   -24   535   in 1981   241   in 2007  
Season HDD   1982   2176   2226   -244   2944   in 1918   1644   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   29   54   31   -2   55   in 1975   -10   in 1968  
Minimum Dew Point   18   46   15   +3   46   in 2020   -20   in 1968  
Average  Dew Point   24   50   23   +1   50   in 2020   -15   in 1968  
 Month Avg Max Dew Point   26.3   32.4   31.9   -5.6   39.4   in 1950   12.0   in 1968  
Month Avg Min Dew Point   21.9   24.5   16.1   +5.8   29.3   in 1998   -9.2   in 1981  
Month Average Dew Point   24.2   31.1   24.0   +0.2   35.5   in 1998   1.6   in 1981  
Maximum Humidity   86%   95%   86%   +0%   100%   in 2017   38%   in 1968  
Minimum Humidity   56%   82%   58%   -2%   96%   in 2014   24%   in 2004  
Average Humidity   71%   89%   72%   -1%   98%   in 2014   33%   in 1968  
Maximum Barometer   30.32   30.45   30.26   +00.06   30.93   in 1991   29.40   in 1987  
Minimum Barometer   30.13   30.06   29.93   +00.20   30.49   in 2015   28.80   in 1987  
Average Barometer   30.23   30.26   30.09   +00.13   30.60   in 1991   29.10   in 1987  
Average Wind   3.3   10.7   7.7   -4.4   15.7   in 1983   3.3   in 2021  
Direction   W   SSW   WNW       S         W        
High Wind Gust   14   30   26   -12   52   in 1927   13   in 1972  
Direction   W   SSW   WNW       NW         W        
High Heat Index                                      
Wind Chill   21   45   17   +4             -24   in 1981  
Maximum Water Temp   43.3   39.6   41.1   +2.2   47.3   in 2016   34.8   in 2018  
Minimum Water Temp   41.9   36.7   38.7   +3.2   44.4   in 2012   33.0   in 2004  
Average Water Temp   42.6   38.2   39.8   +2.8   45.8   in 2016   34.0   in 2018  
Sunrise/ AM Twilight   7:10:16 AM   6:39:40 AM            
Sunset / PM Twilight   4:36:57 PM   5:07:33 PM            
Length Of Day   9:26:41                          
Special Conditions   None                              
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