719
CXUS55 KRIW 291757
CLAGEY

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1034 AM MST THU JAN 29 2026

...PRELIMINARY ANNUAL CLIMATE SUMMARY FOR GREYBULL FOR 2025...

...7TH WARMEST YEAR AT 47.9 DEGREES (1.7 DEGREES ABOVE NORMAL)
...12TH COLDEST SUMMER AT 72.1 DEGREES. (16TH WARMEST)
...7TH WETTEST YEAR WITH 7.07 INCHES (127.4% OF NORMAL)

...HOT AND COLD MONTHS: 1ST COLDEST FEB, 6TH WARMEST MAR, 5TH
WARMEST MAY, 10TH COLDEST JULY, 9TH WARMEST AUGUST, 4TH WARMEST
SEPTEMBER, 2ND WARMEST OCTOBER, 3RD WARMEST NOVEMBER, AND 1ST
WARMEST DECEMBER.

...WET AND DRY MONTHS: 7TH WETTEST JAN, 8TH DRIEST FEBRUARY, 10TH
DRIEST APR, 9TH WETTEST MAY, 2ND WETTEST OCTOBER, AND 4TH WETTEST
DECEMBER.

...HOT DAYS: MAR 27TH 80F, MAY 4TH 85F (T 2004) MAY 10TH 87F, MAY
11TH 89F, JUN 1ST 95F (T 2020), AUG 19TH 101F, AUG 20TH 101F, SEP
21ST 86F, NOV 15TH 66F (T 2016); DEC 16TH 59F, DEC 17TH 59F, DEC
24TH 65F, DEC 25TH 60F, DEC 26TH 57F AND DEC 27TH 48F.

...COLD DAYS: JAN 20TH -14F, FEB 13TH -28F, FEB 19TH -26F, APR 5TH
17F, APR 19TH 27F (T 2021,2022), JUN 23RD 41F, JUN 24TH 47F (T
2003), AUG 9TH 47F, AND SEP 6TH 39F.

...WET DAYS: JAN 4TH 0.06, JAN 8TH 0.09, MAR 6TH 0.07, MAR 18TH
0.23, MAR 30TH 0.12, APR 17TH 0.22F, MAY 11TH 0.40 (T 2005), MAY
13TH 0.60, JUL 22ND 0.26, JUL 30TH 0.28, AUG 1ST 0.06, SEP 23RD
0.53, OCT 3RD 0.02, OCT 4TH 0.68, OCT 16TH 0.72, OCT 19TH 0.01,
NOV 7TH 0.02; DEC 5TH 0.09, DEC 6TH 0.09, AND DEC 9TH 0.02,

...PEAK WIND: DECEMBER 17TH 300/70 MPH. JULY 4TH 280/67 MPH AND JULY
30TH 240/67 MPH.


...THE GREYBULL WY CLIMATE SUMMARY FOR THE YEAR OF 2025...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2026

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
RECORD
 HIGH            108   07/14/2002
 LOW             -37   01/27/2009
HIGHEST          101                 MM
LOWEST           -28                 MM
AVG. MAXIMUM    62.0                        2.1
AVG. MINIMUM    33.7                        1.1
MEAN            47.9

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        8.68   2023
 MINIMUM        3.88   2021
TOTALS          7.07               5.55    1.52


DEGREE DAYS
HEATING TOTAL   6876
COOLING TOTAL    791
..............................................................

WIND (MPH)
HIGHEST WIND SPEED/DIRECTION    53/290    DATE  12/17
HIGHEST GUST SPEED/DIRECTION    70/300    DATE  12/17


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             31     MIXED PRECIP               0
HEAVY RAIN                9     RAIN                      19
LIGHT RAIN               94     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                2     SNOW                      11
LIGHT SNOW               39     SLEET                      0
FOG                      70     FOG W/VIS <= 1/4 MILE      9
HAZE                     25

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

$$