National Weather Service United States Department of Commerce
Climate Data
Monthly Numbers
Interested in temperature and precipitation numbers in Harrison? Check them out on a monthly basis below.
 
Climate Summary (May 2020)
 
...THE HARRISON CLIMATE SUMMARY FOR THE MONTH OF MAY 2020...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1891 TO 2020

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              99   05/29/1926
                        05/28/1926
 LOW               26   05/02/1911
                        05/01/1903
HIGHEST            86   05/24        76      10       87  05/16
                        05/02
LOWEST             36   05/09        56     -20       44  05/13
                                                          05/10
AVG. MAXIMUM     73.3              76.2    -2.9     76.8
AVG. MINIMUM     53.6              55.4    -1.8     57.1
MEAN             63.4              65.8    -2.4     67.0
DAYS MAX >= 90      0               0.4    -0.4        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.0     0.0        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        16.87   1961
 MINIMUM         0.59   2012
TOTALS           7.76              4.69    3.07     5.98
DAILY AVG.       0.25              0.15    0.10     0.19
DAYS >= .01        16              12.6     3.4       12
DAYS >= .10        12                                  9
DAYS >= .50         7                                  4
DAYS >= 1.00        1               1.6    -0.6        2
GREATEST
 24 HR. TOTAL    2.85   05/16 TO 05/17

SNOWFALL (INCHES)
RECORDS
 TOTAL            0.1   2013
 24 HR TOTAL      0.1   05/03/2013 TO 05/03/2013
 SNOW DEPTH         T   05/03/2013
TOTALS            0.0               0.0     0.0      0.0
 LIQUID EQUIV    0.00              0.00    0.00     0.00
SINCE 7/1         1.3              11.5   -10.2      4.5
 LIQUID 7/1      0.13              1.00   -0.87     0.45
SNOWDEPTH AVG.      0
DAYS >= TRACE       0               0.0     0.0        0
DAYS >= 1.0         0                                  0
GREATEST
 SNOW DEPTH         0   MM
 24 HR TOTAL      0.0

DEGREE_DAYS
HEATING TOTAL     112                77      35       60
 SINCE 7/1       3734              3998    -264     3989
COOLING TOTAL      72               102     -30      128
 SINCE 1/1        121               139     -18      171

FREEZE DATES
RECORD
 EARLIEST     09/13/1902
 LATEST       05/17/1912
EARLIEST                        10/29
LATEST                          04/04
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.9
HIGHEST WIND SPEED/DIRECTION    26/050    DATE  05/15
HIGHEST GUST SPEED/DIRECTION    41/340    DATE  05/15

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR           12
NUMBER OF DAYS PC             13
NUMBER OF DAYS CLOUDY          6

AVERAGE RH (PERCENT)     72

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

&&

...Harrison Supplemental Climate Summary for May 2020...

.Summary

As far as temperatures go, extended periods of warmth were few and far between.
In fact, going by departure from normal, the warmest days were in the first few days
of the month, and a couple of days in the final week. By and large, though, most days
saw below average temperatures. Rainfall was frequent, and distributed throughout the
month, though there were never any breaks in the rain longer than three days.

.Monthly Temperatures
The average high temperature was the coldest since 2002, and the 11th coldest on record
The average low temperature was the coldest since 2005
The average monthly temperature was the coldest since 2002

.Daily Temperatures
Above average on 12 days
Below average on 17 days
Average on 2 days
Days with lows AOA  70: 0 (first time since 2017)
Days with highs AOA 90: 0 (second May in a row)

.Daily Temperature Records Tied or Broken During the Month

Date  Record  Type               New Record   Previous Record
11th  Coldest High Temperature      51 in 2020      57 in 1990
12th  *Coldest High Temperature    49 in 2020      60 in 1919
*Most recently tied May 5, 1907 for the 5th coldest high temperature on record in May
at Harrison

Additional notes:
11th  The daily average of 44.5 was the 6th coldest daily average temperature in May
at Harrison

.Monthly Rainfall...
Rainfall was above average for the second May in a row. It was the wettest May in five
years (since 2015). There were 16 days with measurable rainfall, which was the most in
May since 2015.

.Daily Rainfall Records Tied or Broken During the Month...
None.

.Miscellaneous Phenomena...
None.