Portsmouth Rhode Island Weather Almanac
Saturday, May 1, 2021
Mostly Cloudy & Light Rain early, Clear Day to Partly Cloudy PM, Windy, Seasonal Temps
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    May 1, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Temperature   64   65   60   +4   77   in 2001   44   in 1950  
Minimum Temperature   40   50   44   -4   54   in 1983   33   in 2000  
Average Temperature   52   58   52   +0   64   in 2001   42   in 1950  
 Month Avg Max Temperature   64.0   65.0   60.0   +4.0   77.0   in 2001   44.0   in 1950  
Month Avg Min Temperature   40.0   50.0   44.0   -4.0   54.0   in 1983   33.0   in 2000  
Month Average Temperature   52.0   58.0   52.0   +0.0   64.0   in 2001   42.0   in 1950  
HDD   13   7   13   +0   23   in 1950   1   in 2001  
Month HDD   13   7   13   +0   23   in 1950   1   in 2001  
Season HDD   4822   4828   5186   -364   6271   in 1904   4305   in 2012  
CDD   0   0   0   +0   0   in     0   in    
Month CDD   0   0   0   +0   0   in 2021   0   in 2021  
Year CDD   0   0   0   +0   13   in 1976   0   in 2021  
Maximum Dew Point   44   58   48   -4   58   in 2020   23   in 1952  
Minimum Dew Point   28   48   36   -8   48   in 2020   12   in 1974  
Average  Dew Point   36   53   42   -6   53   in 2020   20   in 1978  
 Month Avg Max Dew Point   44.0   58.0   48.0   -4.0   58.0   in 2020   23.0   in 1952  
Month Avg Min Dew Point   28.0   48.0   36.0   -8.0   48.0   in 2020   12.0   in 1974  
Month Average Dew Point   36.0   53.0   42.0   -6.0   53.0   in 2020   20.0   in 1978  
Precipitation   .07   .88   .13   -.06   1.28   in 1953            
One Hour   .05   .19           .45   in 1953            
Hourly Rate   .12   .52           4.06   in 2014            
Month Precipitation   .07   .88   .13   -.06   1.28   in 1953   .00   in 2015  
Year Precipitation   11.77   17.08   15.86   -4.09   31.21   in 1983   7.53   in 1985  
Snow   0.0   0.0   0.0   +0.0   T   in 1995            
Snow Depth   0   0               in            
Month Snow   0.0   0.0   0.0   +0.0   T   in 1995       in    
Season Snow   27.7   12.9   33.5   -5.8   84.1   in 1996   5.0   in 1998  
    May 1, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   87%   96%   87%   +0%   100%   in 2017   45%   in 1952  
Minimum Humidity   35%   73%   48%   -13%   93%   in 2014   19%   in 2007  
Average Humidity   61%   85%   67%   -6%   97%   in 2014   34%   in 1952  
Maximum Barometer   29.85   29.98   30.09   -00.24   30.57   in 1934   29.63   in 1968  
Minimum Barometer   29.48   29.63   29.84   -00.36   30.35   in 2013   29.32   in 1968  
Average Barometer   29.67   29.81   29.97   -00.30   30.41   in 2013   29.48   in 1968  
Average Wind   10.5   9.5   7.3   +3.2   14.4   in 1983   3.1   in 1989  
Direction   NW   SE   S       S         ESE        
High Wind Gust   38   28   24   +14   43   in 1974   13   in 2018  
Direction   NW   SE   S       NW         WNW        
High Heat Index                   77   in 2001            
Wind Chill   33                         26   in 2000  
Maximum Water Temp   49.1   43.2   50.9   -1.8   58.8   in 2007   43.2   in 2020  
Minimum Water Temp   48.0   40.8   47.8   +0.2   53.6   in 2007   40.8   in 2020  
Average Water Temp   48.6   42.0   49.4   -0.8   56.2   in 2007   42.0   in 2020  
Sunrise/ AM Twilight   5:40:37 AM   5:10:25 AM            
Sunset / PM Twilight   7:43:50 PM   8:14:01 PM            
Length Of Day   14:03:13                          
Special Conditions   None                              
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