Portsmouth Rhode Island Weather Almanac  
Saturday, February 18, 2023  
Clear, Windy and Much Colder  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    February 18, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   38   56   40   -2   56   in 2022   15   in 1958  
Minimum Temperature   23   24   25   -2   40   in 2008   -3   in 1979  
Average Temperature   31   40   33   -2   48   in 2008   7   in 1958  
 Month Avg Max Temperature   45.7   42.4   38.6   +7.1   45.7   in 2023   22.1   in 1979  
Month Avg Min Temperature   26.8   25.5   24.3   +2.4   30.7   in 2020   7.4   in 1979  
Month Average Temperature   36.6   34.2   31.9   +4.6   37.5   in 2020   14.9   in 1979  
High Heat Index                                      
Low Wind Chill   10   13   12   -2             -22   in 1958  
Heating Degree Days   34   25   32   +2   58   in 1958   17   in 2008  
Month HDD   512   554   595   -83   901   in 1979   495   in 2020  
Season HDD   3006   3251   3514   -508   4477   in 1918   2895   in 2016  
Cooling Degree Days   0   #N/A   #REF!   #REF!   0   in 2023   0   in    
Month CDD                                 in    
Year CDD                                      
Maximum Dew Point   26   56   31   -5   56   in 2022   -1   in 1979  
Minimum Dew Point   15   12   14   +1   40   in 2008   -21   in 1979  
Average  Dew Point   21   34   23   -2   47   in 2008   -11   in 1979  
 Month Avg Max Dew Point   35.8   37.2   29.4   +6.4   38.7   in 2018   2.7   in 1979  
Month Avg Min Dew Point   16.0   17.2   12.9   +3.1   22.6   in 2020   -9.0   in 1979  
Month Average Dew Point   26.1   27.2   23.0   +3.1   29.6   in 2020   -3.1   in 1979  
Precipitation   .00   .67   .13   -.13   2.94   in 1998            
One Hour   .00   .23           1.02   in 1998            
Hourly Rate   .00   2.80           2.80   in 2022            
Month Precipitation   .41   3.94   2.13   -1.72   5.93   in 1988   .07   in 1912  
Year Precipitation   7.60   5.90   5.80   +1.80   12.38   in 1979   2.33   in 1980  
Snow   0.0   0.0   0.4   -0.4   12.0   in 1893       in    
Snow Depth   0   0           24   in 2015       in    
Month Snow   T   7.5   6.4   -6.4   26.4   in 2003   0.0   in 2020  
Season Snow   2.3   32.2   23.5   -21.2   61.1   in 1996   2.3   in 2023  
    February 18, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   74%   99%   84%   -10%   100%   in 2018   45%   in 1987  
Minimum Humidity   44%   48%   51%   -7%   95%   in 1998   23%   in 2006  
Average Humidity   59%   74%   67%   -8%   98%   in 1998   36%   in 1987  
Maximum Barometer   30.35   30.05   30.17   +00.18   30.89   in 1979   29.45   in 1958  
Minimum Barometer   29.87   29.33   29.81   +00.06   30.57   in 1979   29.14   in 1952  
Average Barometer   30.11   29.69   29.99   +00.12   30.73   in 1979   29.40   in 1958  
Average Wind   10.0   15.9   8.6   +1.4   19.3   in 1952   2.0   in 1995  
Direction   NW   NW   NW       NNE SSE
High Wind Gust   34   48   27   +7   52   in 1900   10   in 1995  
Direction   NNW   SSW   NW       N SW
Maximum Water Temp   43.2   43.3   38.1   +5.1   43.8   in 2012   32.7   in 2015  
Minimum Water Temp   41.0   41.2   36.0   +5.0   41.9   in 2012   31.3   in 2007  
Average Water Temp   42.1   42.3   37.1   +5.0   42.9   in 2012   32.4   in 2015  
Sunrise/ AM Twilight   6:36:22 AM   6:06:18 AM            
Sunset / PM Twilight   5:22:06 PM   5:51:46 PM            
Length Of Day   10:45:44                          
Special Conditions   None                              
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