Portsmouth Rhode Island Weather Almanac
Saturday, January 9, 2021
Partly Cloudy to Cloudy PM, Breezy and Colder
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    January 9, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Temperature   35   31   39   -4   58   in 1937   15   in 1968  
Minimum Temperature   25   20   25   +0   46   in 2008   -5   in 1968  
Average Temperature   30   26   32   -2   50   in 1937   5   in 1968  
 Month Avg Max Temperature   39.9   41.3   39.6   +0.3   51.7   in 2007   23.0   in 1918  
Month Avg Min Temperature   29.8   31.7   25.7   +4.0   39.4   in 2007   8.1   in 1981  
Month Average Temperature   34.8   36.5   32.7   +2.2   45.6   in 2007   16.7   in 1904  
Precipitation   .00   .00   .12   -.12   2.04   in 1953            
One Hour   .00   .00           .28   in 1975            
Hourly Rate   .00   .00           .25   in 2019            
Month Precipitation   .45   .55   1.10   -.65   4.52   in 1979   T   in 1901  
Year Precipitation   .45   .55   1.10   -.65   4.52   in 1979   T   in 1901  
Snow   0.0   0.0   0.3   -0.3   5.8   in 1974            
Month Snow   0.3   1.5   2.7   -2.4   24.9   in 1996   0.0   in 2007  
Season Snow   8.3   9.9   9.8   -1.5   40.7   in 1996   T   in 2000  
Snow Depth   0   T           25   in 1996            
HDD   35   39   33   +2   60   in 1968   15   in 1937  
Month HDD   270   254   291   -21   433   in 1904   174   in 2007  
Season HDD   1918   2134   2160   -242   2872   in 1918   1602   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   23   15   31   -8   52   in 1999   -9   in 1968  
Minimum Dew Point   15   6   15   +0   39   in 1998   -27   in 1968  
Average  Dew Point   19   11   23   -4   41   in 1998   -18   in 1968  
 Month Avg Max Dew Point   27.2   32.4   32.1   -4.9   37.9   in 1950   14.1   in 1981  
Month Avg Min Dew Point   22.7   23.4   16.4   +6.3   29.9   in 2007   -8.6   in 1981  
Month Average Dew Point   25.1   29.3   24.2   +0.8   38.3   in 2007   2.8   in 1981  
Maximum Humidity   68%   64%   87%   -19%   100%   in 2019   44%   in 1968  
Minimum Humidity   53%   37%   56%   -3%   97%   in 1998   26%   in 1968  
Average Humidity   61%   51%   71%   -10%   99%   in 1998   35%   in 1968  
Maximum Barometer   29.91   30.77   30.16   -00.25   30.77   in 2020   29.46   in 2003  
Minimum Barometer   29.77   30.22   29.84   -00.07   30.49   in 2017   28.44   in 1978  
Average Barometer   29.84   30.50   30.00   -00.16   30.60   in 2017   29.12   in 1978  
Average Wind   8.1   10.3   8.6   -0.5   22.2   in 1978   1.4   in 1981  
Direction   N   NW   WNW       SSW         SSE        
High Wind Gust   20   35   27   -7   56   in 1978   11   in 1981  
Direction   N   WNW   WNW       WSW         SE        
High Heat Index                                      
Wind Chill   16   7   15   +1             -26   in 1968  
Maximum Water Temp   43.9   38.8   41.8   +2.1   50.0   in 2007   33.7   in 2018  
Minimum Water Temp   41.7   36.6   39.1   +2.6   47.8   in 2007   30.0   in 2018  
Average Water Temp   42.8   37.7   40.3   +2.5   48.9   in 2007   32.3   in 2018  
Sunrise/ AM Twilight   7:10:51 AM   6:40:08 AM            
Sunset / PM Twilight   4:34:48 PM   5:05:31 PM            
Length Of Day   9:23:57                          
Special Conditions   None                              
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