Climatological Report (Annual)
Issued by NWS Portland, OR
Issued by NWS Portland, OR
630
CXUS56 KPQR 020104 RRC
CLAPDX
ANNUAL CLIMATE REPORT
NATIONAL WEATHER SERVICE PORTLAND OR
500 PM PST WED 1 JAN 2025
...PORTLAND 2024 WEATHER IN REVIEW...
2024 NOTABLE WEATHER EVENTS & RECORDS
* MID-JANUARY WINTER STORM INCLUDING SNOW, ICE, WIND AND COLD
* HEATWAVE OF EARLY JULY
* WARMEST JULY ON RECORD
* AUGUST THUNDERSTORMS
* 2ND WARMEST SEPTEMBER ON RECORD
* 3RD WARMEST DECEMBER ON RECORD
* 2024 FINISHED AS 2ND WARMEST YEAR FOR THE AIRPORT (SINCE 1941)
MONTHLY WEATHER RECAPS...
JANUARY...RATHER TYPICAL START TO THE NEW YEAR WITH MILD CONDITIONS
AND RAIN AT TIMES. THEN, STRONG OFFSHORE FLOW ALLOWED COLDER AIR TO
PUSH INTO THE AREA. A VERY STRONG ARCTIC FRONT MOVED ACROSS THE AREA
ON THE 12TH AND 13TH, WITH TEMPERATURES PLUMMETING 20-25 DEGREES
BELOW NORMAL. STRONG EASTERLY WINDS OCCURRED ACROSS THE PORTLAND
METRO WITH WINDS GUSTING 40 TO 60 MPH, ALONG WITH A MIX OF WINTRY
PRECIPITATION. THE FRONT STALLED OVER SOUTHWEST OREGON ON 14TH, THEN
MOVED NORTHWARD AS A WARM FRONT ON THE 16TH AND 17TH, BRINGING
FREEZING RAIN TO THE PORTLAND METRO. WITH THE ICE, AND IN SOME AREAS
THE CONTINUED STRONG EAST WINDS, THERE WAS SIGNIFICANT TREE DAMAGE
AND POWER OUTAGES. TEMPERATURES MODERATED BY THE 20TH WITH MORE
RAIN. THE 9.43 INCHES OF PRECIPITATION AT PORTLAND (PDX) WAS THE 7TH
MOST ON RECORD FOR JANUARY.
FEBRUARY...BEGAN THE MONTH QUITE MILD WITH HIGHS IN THE LOWER 60S ON
THE 1ST, COOLING BACK INTO THE 50S AFTERWARDS. LOW PRESSURE OVER
BRITISH COLUMBIA DROPPED SOUTH THE 14TH TO 17TH, BRINGING COOLER
WEATHER. TEMPERATURES ROSE INTO THE LOWER 60S ON THE 22ND AND
23RD. STRONG MOIST SOUTHWEST FLOW BROUGHT RAIN TO CLOSE THE MONTH.
MARCH...MARCH BEGAN RATHER COOL AND DAMP AS COOLER AIR REMAINED OVER
THE PACIFIC NORTHWEST, WITH OCCASIONAL SHOWERS. THEN, BRIEF PERIOD
OF HIGH PRESSURE BROUGHT MILDER TEMPERATURES AND DRY WEATHER. A
POTENT FRONT MOVED ONSHORE THE 10TH. HIGH PRESSURE RETURNED WHILE
OFFSHORE FLOW THE 14TH TO 19TH CONTRIBUTED TO RATHER WARM AIR MASS
WITH HIGHS IN THE 70S. THE HIGH OF 77 DEGREES ON THE 18TH TIED FOR
THE 2ND WARMEST MARCH DAY ON RECORD. THE HIGH PRESSURE RIDGE
GRADUALLY WEAKENED AS LOW PRESSURE PERSISTED JUST OFFSHORE THROUGH
THE 29TH, MAINTAINING COOLER, SHOWERY WEATHER.
APRIL...MILD WEATHER EARLY IN THE MONTH WITH WARMEST DAY ON THE 2ND.
A VIGOROUS UPPER LOW DROPPED OVER THE PACIFIC NW THE 3RD TO 5TH
BRINGING RAIN AND COOLER CONDITIONS. ONSHORE FLOW MAINTAINED
UNSETTLED WEATHER AS OCCASIONAL FRONTS PUSHED ONSHORE. BY THE MIDDLE
OF THE MONTH, RATHER STRONG HIGH PRESSURE RIDGE JUST OFFSHORE
BROUGHT OFFSHORE WINDS WITH WARM DRY WEATHER. COOLER AND SHOWERY
WEATHER RETURNED FOR THE 25TH TO 30TH.
MAY...OVERALL, FAIRLY TYPICAL WEATHER FOR THE MONTH OF MAY. BEGAN
COOL AND SHOWERY AS BROAD UPPER LOW PRESSURE SHIFTED ACROSS THE
PACIFIC NORTHWEST. A STRONG FRONT PUSHED ACROSS THE REGION ON THE
4TH WITH MODEST RAINFALL OF AROUND AN INCH. HIGH PRESSURE
STRENGTHENED WHILE OFFSHORE FLOW ALLOWED FOR DRY AND WARMING
CONDITIONS. A HIGH OF 91 DEGREES ON THE 10TH WAS THE WARMEST DAY OF
THE MONTH, ALSO SETTING A DAILY RECORD. BY THE 16TH, ONSHORE FLOW
RETURNED WITH MORE SEASONAL TEMPERATURES ALONG WITH SPOTTY LIGHT
PRECIPITATION AS WEAK FRONTS IN THE FLOW MOVED ONSHORE. THE
STRONGEST FRONT ARRIVED ON THE 21ST. UNEVENTFUL END OF MAY THANKS TO
RATHER PERSISTENT HIGH PRESSURE OFFSHORE AND VARIABLE ONSHORE FLOW.
JUNE...JUNE STARTED RATHER WET AS A STRONG COLD FRONT PUSHED INTO
THE REGION THE 2ND AND 3RD. THEN, MOSTLY WESTERLY FLOW ALOFT
MAINTAINED NEAR SEASONAL TEMPERATURES. ANOTHER UPPER TROUGH MOVED
ONSHORE FROM THE 15TH TO 17TH, WITH SCATTERED SHOWERS AND COOLER
TEMPERATURES. AFTERWARDS, HIGH PRESSURE STRENGTHENED BRINGING
ANOTHER WARMING TREND WITH HIGHS IN THE UPPER 80S TO LOWER 90S ON
THE 19TH THROUGH 22ND. WESTERLY FLOW CONTINUED THROUGH THE END OF
JUNE, MAINTAINING MILD AND DRY WEATHER.
JULY...OVERALL, IT WAS A WARM AND DRY JULY. IN FACT, IT WAS THE
WARMEST JULY ON RECORD FOR PORTLAND. MULTIPLE DAILY HIGH TEMPERATURE
RECORDS WERE SET DURING A 5-DAY STRETCH FROM THE 5TH TO 9TH. HIGHS
GRADUALLY TRENDED WARMER EACH DAY, RANGING FROM 99 TO 104. AS HIGH
PRESSURE SHIFTED EAST, SOUTHWEST FLOW ALLOWED FOR COOLER MARINE AIR
TO FILTER INLAND. BUT, TEMPERATURES REMAINED ABOVE NORMAL THROUGH
THE 20TH. BY THE 25TH, A RATHER STRONG UPPER TROUGH MOVED OVER THE
REGION. MORE SEASONAL CONDITIONS FINISHED OUT THE MONTH.
AUGUST...BEGAN WARM WITH RETURN OF STRONG HIGH PRESSURE OVER THE
REGION. THEN, VARIABLE ONSHORE FLOW BROUGHT SEASONAL TEMPERATURES. A
FRONT PUSHED ACROSS THE REGION ON THE 12TH, COOLING TEMPERATURES
INTO THE LOWER 70S. BY MID-MONTH, A RATHER STRONG UPPER TROUGH
DROPPED OUT OF THE GULF OF ALASKA ON THE 15TH TO 18TH, CREATING A
RATHER UNSTABLE AIR MASS, WITH SHOWERS AND THUNDERSTORMS ON THE
17TH. ANOTHER UPPER LOW MOVED INTO THE REGION FROM THE 21ST TO 25TH,
KEEPING TEMPERATURES ON THE COOLER SIDE ALONG WITH SOME LIGHT RAIN.
HIGH PRESSURE STRENGTHENED WITH A WARMING TREND THE 29TH THROUGH THE
END OF THE MONTH.
SEPTEMBER...AFTER A MILD START TO THE MONTH, HIGH PRESSURE OVER THE
REGION STRENGTHENED, BRINGING MUCH WARMER CONDITIONS FOR THE 4TH
THROUGH 6TH. THE HIGH OF 102 ON THE 5TH SET A DAILY RECORD, AND TIED
FOR THE LATEST DATE IN THE SEASON WITH A TEMPERATURE AT OR ABOVE 100
DEGREES AT PORTLAND INTERNATIONAL. TEMPERATURES REMAINED WARM
THROUGH THE 10TH. BY MID-MONTH, A RATHER STRONG UPPER TROUGH DROPPED
OUT OF THE GULF OF ALASKA ON THE 10TH TO 12TH, BRINGING COOLER
SHOWERY WEATHER. ANOTHER BRIEF WARMING PERIOD OCCURRED FROM THE 22ND
TO 24TH. A STRONG COLD FRONT MOVED INLAND ON THE 25TH, BRINGING RAIN
AND MUCH COOLER TEMPERATURES. OVERALL, ENDED UP AS THE 2ND WARMEST
SEPTEMBER ON RECORD.
OCTOBER...FALL WAS IN FULL FORCE AS THE MONTH BEGAN WITH A ROLLER
COASTER RIDE. HIGHS IN THE LOWER 80S ON THE 1ST AND 7TH, WHILE A
COLD FRONT MOVED ACROSS THE REGION ON THE 4TH. COOLER MARINE AIR
SPREAD INLAND ON THE 8TH. FRONTS BROUGHT RAIN NEARLY EACH DAY FROM
THE 14TH THROUGH THE 21ST. A STRONGER FRONT MOVED TOWARD THE REGION
THE 26TH, PUSHING INLAND ON THE 27TH, BRINGING RAIN AND COOLER AIR.
SHOWERS AND COOL TEMPERATURES PERSISTED THROUGH THE END OF THE
MONTH.
NOVEMBER...THE WET WEATHER OF LATE OCTOBER ROLLED INTO NOVEMBER WITH
SEASONABLE TEMPERATURES. DRY PERIOD 6TH THROUGH 9TH, THEN FRONTS
MOVED ACROSS THE AREA. COOLER AND DRY WEATHER TO END THE MONTH.
OVERALL ABOVE AVERAGE RAINFALL.
DECEMBER...FIRST TIME ON RECORD THAT THE FIRST 6 DAYS OF DECEMBER
REMAINED DRY. BUT THE DRY STREAK ENDED AS WET WEATHER RETURNED,
ALONG WITH ABOVE AVERAGE TEMPERATURES, FINISHING THE MONTH AS THE
3RD WARMEST DECEMBER ON RECORD. THE HIGH OF 60 DEG ON THE 18TH SET A
DAILY RECORD HIGH TEMPERATURE. ALSO FINISHED THE MONTH AROUND AN
INCH ABOVE AVERAGE RAINFALL. STORMY WEATHER FOR CHRISTMAS NIGHT
THROUGH THE 26TH WITH BREEZY SOUTHERLY WINDS WITH GUSTS UP TO 45
MPH.
==============================================================
NEW RECORDS SET IN 2024 (PREVIOUS RECORD IN PARENTHESES)
+ INDICATES MOST RECENT OF MULTIPLE PRIOR OCCURRENCES
JANUARY...
13TH NEW. DAILY COOL HIGH TEMP 21 ( 29 /2017 )
14TH NEW. DAILY COOL HIGH TEMP 23 ( 24 /1950 )
FEBRUARY...
1ST NEW. DAILY WARM HIGH TEMP 62 ( 61 /1986 )
29TH NEW. DAILY RAINFALL 1.10" (0.32"/2016 )
MARCH....
17TH TIED. DAILY WARM HIGH TEMP 76 ( 76 /1947 )
18TH NEW. DAILY WARM HIGH TEMP 77 ( 71 /1988 )
21ST NEW. DAILY WARM LOW TEMP 50 ( 49 /2004 )
APRIL...
NO RECORDS SET OR TIED.
MAY...
10TH NEW. DAILY WARM HIGH TEMP 91 ( 89 /2019 )
JUNE...
2ND NEW. DAILY RAINFALL 0.69" (0.67"/2010 )
JULY...
5TH NEW. DAILY WARM HIGH TEMP 99 ( 98 /2023 )
6TH NEW. DAILY WARM HIGH TEMP 99 ( 97 /1960 )
7TH NEW. DAILY WARM LOW TEMP 65 ( 64 /2014 )
7TH NEW. DAILY WARM HIGH TEMP 100 ( 95 /2010 )
8TH NEW. DAILY WARM LOW TEMP 67 ( 63 /2010 )
8TH NEW. DAILY WARM HIGH TEMP 102 ( 98 /1952 )
9TH NEW. DAILY WARM LOW TEMP 67 ( 65 /1985 )
9TH NEW. DAILY WARM HIGH TEMP 104 ( 96 /1985 )
10TH NEW. DAILY WARM LOW TEMP 66 ( 64 /1985 )
*** WARMEST JULY ON RECORD ***
JULY 2024 MEAN TEMP OF 74.4 (4.2 DEG ABOVE AVERAGE).
BREAKS PRIOR WARMEST JULY (1985 WITH 74.1 DEG).
AUGUST...
1ST TIED. DAILY WARM LOW TEMP 66 ( 66 /2022 )
1ST NEW. DAILY WARM HIGH TEMP 99 ( 98 /2015 )
2ND NEW. DAILY WARM LOW TEMP 69 ( 67 /2015 )
21ST TIED. DAILY WARM LOW TEMP 64 ( 64 /2004 )
SEPTEMBER...
3RD TIED. DAILY WARM LOW TEMP 63 ( 63 /2022 )
5TH NEW. DAILY WARM HIGH TEMP 102 ( 101 /1944 )
7TH NEW. DAILY WARM LOW TEMP 67 ( 66 /2017 )
*** 2ND WARMEST SEPTEMBER ON RECORD ***
SEPT 2024 MEAN TEMP OF 67.7 (2.3 DEG ABOVE AVERAGE).
OCTOBER...
NO RECORDS SET OR TIED.
NOVEMBER...
13TH TIED. DAILY WARM LOW TEMP 51 ( 51 /2015 )
DECEMBER...
18TH NEW. DAILY WARM HIGH TEMP 60 ( 59 /2018 )
*** 3RD WARMEST DECEMBER ON RECORD ***
DEC 2024 MEAN TEMP OF 44.9 (3.3 DEG ABOVE AVERAGE).
=============================================================
2024 PORTLAND MONTHLY TEMPERATURE/PRECIPITATION RANKINGS
THIS TABLE SHOWS WHERE EACH MONTH/YEAR RANKS IN PORTLAND`S
CLIMATE RECORD (OCT 1940-2024). RANKINGS APPLY TO ALL OF THE
SAME MONTH: EX. WHERE JUNE 2024 COMPARES TO ALL OTHER JUNES.
JA FE MA AP MA JU JL AU SE OC NO DE 2024
AVG T 43 12 12 9 30 10 1 12 2 11 17 3 2
PRECIP 7 26 59 64 32 46 62 41 64 39 31 32 29
MAX T 30 25 79 31 11 22 3 12 1 28 55 3 3
MIN T 79 9 35 19 15 5 2 24 10 11 18 4 2
PORTLAND`S RANGE IS 1 TO 84, WHERE 1 = WARMEST OR WETTEST
84 = DRIEST OR COLDEST
=============================================================
2024 PORTLAND AIRPORT TEMPERATURE DATA
+ BY DATE = MOST RECENT OF MULTIPLE OCCURENCES
|--- AVERAGES ----|MEAN T DEPART| EXTREME TEMPS & DATE|
MONTH |HIGHS LOWS MEAN| FROM NORMAL | HIGHEST LOWEST |
--------------------------------------------------------------
JAN 44.8 35.7 40.3 -1.6 DEG 58 /29TH 15 /13TH
FEB 52.9 39.5 46.2 +2.1 DEG 63 /23RD 31 / 4TH
MAR 58.3 41.6 50.0 +1.7 DEG 77 /18TH 30 / 7TH+
APR 63.2 45.6 54.4 +1.6 DEG 78 /23RD 38 /18TH
MAY 69.2 49.4 59.3 -0.1 DEG 91 /10TH 41 / 8TH
JUN 77.0 55.3 66.2 +2.0 DEG 92 /21ST 49 /14TH
JUL 87.8 61.0 74.4 +4.2 DEG 104 / 9TH 55 / 3RD+
AUG 83.2 60.4 71.8 +1.2 DEG 99 / 1ST 53 /28TH
SEP 78.3 57.0 67.7 +2.3 DEG 102 / 5TH 44 /30TH
OCT 66.7 48.5 57.6 +2.0 DEG 82 / 7TH 39 /24TH
NOV 53.4 43.5 48.5 +1.4 DEG 63 / 7TH 31 /30TH
DEC 50.3 39.5 44.9 +3.3 DEG 60 /18TH 27 / 2ND
2024 65.4 48.1 56.8 +1.7 DEG 104 /JUL 9 15 /JAN 13
NORMAL 63.9 46.2 55.1
DAYS IN 2024 WITH TEMPERATURE OF...
|------ MAXIMUM TEMP --------||------ MINIMUM TEMP ---|
<=32 60+ 70+ 80+ 90+ 100+ <=20 <=32 60+ 70+
--------------------------------------------------------------
JAN 4 0 0 0 0 0 3 6 0 0
FEB 0 3 0 0 0 0 0 1 0 0
MAR 0 12 5 0 0 0 0 3 0 0
APR 0 17 8 0 0 0 0 0 0 0
MAY 0 27 13 6 2 0 0 0 0 0
JUN 0 30 24 12 2 0 0 0 4 0
JUL 0 31 31 26 13 3 0 0 19 0
AUG 0 31 30 20 7 0 0 0 19 0
SEP 0 30 27 11 4 1 0 0 10 0
OCT 0 25 13 3 0 0 0 0 0 0
NOV 0 2 0 0 0 0 0 1 0 0
DEC 0 1 0 0 0 0 0 6 0 0
2024 4 209 151 77 28 4 3 17 52 0
NORMAL 1 202 126 62 15 <1 2 31 32 0
FIRST/LAST OCCURRENCES OF... IN 2024 AVERAGE
LAST 32 DEG OR COLDER IN SPRING 8 MAR (26 MAR)
FIRST 70+ DEG OF THE YEAR 15 MAR ( 2 APR)
FIRST 80+ DEG OF THE YEAR 9 MAY ( 8 MAY)
FIRST 90+ DEG OF THE YEAR 10 MAY ( 4 JUN)
LAST 90+ DEG OF THE YEAR 24 SEP ( 5 SEP)
LAST 80+ DEG OF THE YEAR 7 OCT (28 SEP)
LAST 70+ DEG OF THE YEAR 19 OCT (17 OCT)
FIRST 32 DEG OR COLDER OF AUTUMN 30 NOV (12 NOV)
==============================================================
2024 PORTLAND AIRPORT RAINFALL DATA...
TOTAL DEPARTURE DAYS WITH AT LEAST... GREATEST IN
MONTH RAIN FM NORMAL 0.01 0.10 0.50 1.00 24HRS & DATE
---------------------------------------------------------------
JAN 9.43 +4.40 26 21 8 1 1.59 JAN 26-27
FEB 4.29 +0.61 19 10 3 1 1.41 FEB 28-29
MAR 2.70 -1.27 16 8 1 0 0.59 FE 29-MA 1
APR 1.79 -1.10 13 5 1 0 0.59 APR 25-26
MAY 2.44 -0.07 11 6 1 0 1.01 MAY 3-4
JUN 1.34 -0.29 7 4 1 0 0.94 JUN 2-3
JUL 0.08 -0.43 2 0 0 0 0.07 JUL 29
AUG 0.60 +0.06 4 2 0 0 0.30 AUG 17
SEP 0.74 -0.78 8 2 0 0 0.40 SEP 25
OCT 3.15 -0.27 13 10 0 0 0.74 OCT 26-27
NOV 6.32 +0.88 21 16 6 0 0.88 NOV 24
DEC 6.79 +1.02 20 16 4 2 1.73 DEC 25-26
2024 39.67 +2.75 160 100 25 4 1.73 DEC 25-26
NORMAL 36.92 156 93 20 4
TOTAL SNOWFALL... 1.6 INCHES ( NORMAL IS 4.2 INCHES )
PORTLAND WATER YEAR 2023-24 (1 OCT 2023 THROUGH 30 SEP 2024)
39.90 INCHES ( 108% OF NORMAL, 2.98" ABOVE NORMAL)
============================================================
2024 PORTLAND AIRPORT WIND AND PRESSURE DATA...
AVERAGE SPEED (MPH) STRONGEST WIND GUST
2024 (NORMAL) DIRECTION SPEED DATE
------------------------------------------------------------
JAN 11.1 (9.1) EAST 46 MPH JAN 13
FEB 8.0 (8.4) EAST 47 MPH FEB 16
MAR 6.5 (7.5) SOUTHWEST 47 MPH MAR 9
APR 6.5 (7.0) WEST 40 MPH APR 20
MAY 6.1 (6.6) NORTHEAST 37 MPH MAY 9
JUN 6.6 (6.8) WEST 32 MPH JUN 15+
JUL 6.0 (7.0) NORTHWEST 30 MPH JUL 24
AUG 5.3 (6.6) SOUTHWEST 41 MPH AUG 17
SEP 4.3 (6.0) NORTHWEST 33 MPH SEP 14
OCT 5.3 (6.2) SOUTHEAST 33 MPH OCT 30
NOV 6.8 (7.9) EAST 45 MPH NOV 19
DEC 8.4 (9.0) SOUTHWEST 44 MPH DEC 26
2024 6.7 MPH (7.3) EAST 51 MPH JAN 4
2024 BAROMETRIC PRESSURE EXTREMES...
HIGHEST 30.50 INCHES 14 MAR ( 208 AM PST )
LOWEST 29.28 INCHES 1 MAR ( 902 PM PST )
==============================================================
2024 LOCAL RIVER EXTREMES
WILLAMETTE RIVER (AT MORRISON ST BRIDGE, DOWNTOWN PORTLAND)
HIGHEST 10.2 FT 29 JAN (FLOOD STAGE IS 18.0 FT)
LOWEST -0.3 FT 30 SEP
COLUMBIA RIVER (NEAR INTERSTATE 5 BRIDGE, VANCOUVER WA)
HIGHEST 9.7 FT 29 JAN (FLOOD STAGE IS 16.0 FT)
LOWEST -0.4 FT 3 OCT
===============================================================
PORTLAND AIRPORT CLIMATE PERIOD OF RECORDS... OCT 1940 TO 2024
PORTLAND AIRPORT CLIMATE NORMALS... 1991 TO 2020
===============================================================
DATA COMPILED BY ROCKEY AND HARTSOCK
ADDITIONAL LOCAL CLIMATE DATA AVAILABLE ON OUR WEBSITE AT:
HTTPS://WWW.WEATHER.GOV/WRH/CLIMATE?WFO=PQR
$$