Climatological Report (Monthly)
Issued by NWS Portland, ME
Issued by NWS Portland, ME
260
CXUS51 KGYX 030933 CCA
CLMPWM
PWMCLMPWM 000
TTAA00 GYX 020359
CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
1158 PM EDT SUN JUN 01 2025
...................................
...THE PORTLAND ME CLIMATE SUMMARY FOR THE MONTH OF MAY 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1941 TO 2025 (FOR TEMPERATURE)
CLIMATE RECORD PERIOD: 1871 TO 2025 (FOR PRECIPITATION)
CLIMATE RECORD PERIOD: 1882 TO 2025 (FOR SNOWFALL)
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH 94 05/31/1987
LOW 23 05/09/1956
HIGHEST 78 05/27 84 -6 84 05/22
05/28
05/23
LOWEST 36 05/01 32 4 34 05/11
AVG. MAXIMUM 61.7 64.2 -2.5 64.5
AVG. MINIMUM 46.8 45.5 1.3 47.5
MEAN 54.3 54.9 -0.6 56.0
DAYS MAX >= 90 0 0.4 -0.4 0
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 0 0.7 -0.7 0
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 12.34 2006
MINIMUM 0.49 1965
TOTALS 6.61 3.67 2.94 1.70
DAILY AVG. 0.21 0.12 0.09 0.05
DAYS >= .01 16 12.5 3.5 9
DAYS >= .10 13 7.1 5.9 6
DAYS >= .50 6 2.5 3.5 0
DAYS >= 1.00 1 0.7 0.3 0
GREATEST
24 HR. TOTAL 2.49 05/09 TO 05/10
SNOWFALL (INCHES)
RECORDS
TOTAL 7.0 1945
TOTALS 0.0 0.0 0.0 0.0
SINCE 7/1 54.1 68.7 -14.6 38.0
SNOWDEPTH AVG. 0
DAYS >= TRACE 0 0.0 0.0
DAYS >= 1.0 0 0.0 0.0
GREATEST
SNOW DEPTH 0
24 HR TOTAL 0
DEGREE DAYS
HEATING TOTAL 327 325 2 290
SINCE 7/1 6590 6705 -115 6068
COOLING TOTAL 0 10 -10 20
SINCE 1/1 0 11 -11 20
................................................................
WIND (MPH)
AVERAGE WIND SPEED 7.7
HIGHEST WIND SPEED/DIRECTION 25/060 DATE 05/22
HIGHEST GUST SPEED/DIRECTION 41/050 DATE 05/22
SKY COVER
AVERAGE SKY COVER 0.73
AVERAGE RH (PERCENT) 80
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 2 HEAVY RAIN 4
RAIN 9 LIGHT RAIN 16
FREEZING RAIN 0 LT FREEZING RAIN 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 FOG 19
FOG W/VIS <= 1/4 MILE 8 HAZE 2
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
&&
...THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN MAY 2025...
DATE RECORD PREVIOUS
MAY 10 2.32 - GREATEST PRECIPITATION - 1.27 IN 1977
MAY 17 4 - SMALLEST TEMPERATURE RANGE - 4 IN 1968 AND 1953
MAY 22 49 - COOLEST HIGH TEMPERATURE - 50 IN 2011 AND 2005
$$