Climatological Report (Monthly)
Issued by NWS Billings, MT
Issued by NWS Billings, MT
343
CXUS55 KBYZ 011044
CLMSHR
CLIMATE REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
441 AM MDT THU OCT 01 2026
...................................
...THE SHERIDAN WY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2026...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1907 TO 2026
WEATHER OBSERVED NORMAL DEPART
VALUE DATE(S) VALUE FROM
NORMAL
................................................
TEMPERATURE (F)
HIGHEST 97 09/04
LOWEST 36 09/15
AVG. MAXIMUM 78.9 75.6 3.3
AVG. MINIMUM 45.4 42.5 2.9
MEAN 62.2 59.1 3.1
DAYS MAX >= 90 3
DAYS MAX <= 32 0
DAYS MIN <= 32 0
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
TOTALS 0.77 1.47 -0.70
DAYS >= .01 4
DAYS >= .10 2
DAYS >= .50 1
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.58 09/20 TO 09/20
DEGREE DAYS
HEATING TOTAL 115 212 -97
SINCE 7/1 135 271 -136
COOLING TOTAL 38 34 4
SINCE 1/1 589 440 149
................................................
WIND (MPH)
AVERAGE WIND SPEED 6.6
HIGHEST WIND SPEED/DIRECTION 36/330 DATE 09/14
HIGHEST GUST SPEED/DIRECTION 50/340 DATE 09/14
AVERAGE RH (PERCENT) 55
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 1 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 2
LIGHT RAIN 7 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 3 FOG W/VIS <= 1/4 MILE 1
HAZE 1
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
&&
...SEPTEMBER 2026 MONTH IN REVIEW FOR SHERIDAN...
BELOW IS A SUMMARY OF THE TEMPERATURE AND PRECIPITATION
STATISTICS FOR SHERIDAN FOR SEPTEMBER 2026. ALL TEMPERATURES ARE IN
DEGREES FAHRENHEIT AND ALL PRECIPITATION AMOUNTS ARE IN INCHES. NORMALS
ARE 30 YEAR AVERAGES CALCULATED FROM 1991 TO 2020. MONTHLY RANKINGS
FOR PRECIPITATION AND TEMPERATURES USE A PERIOD
OF RECORD THAT STARTED IN MAY 1934 AT OR NEAR THE SHERIDAN AIRPORT.
NUMBERS DENOTED WITH AN * IS MISSING DATA IN THE CALCULATION.
...SHERIDAN MONTHLY PRECIPITATION...
MONTH 2026 VALUES NORMALS DEPARTURE RANKING
SEPTEMBER 0.77 1.47 -0.70 TIED FOR THE 39TH DRIEST OUT OF 120 YEARS
(RECORD DRIEST WAS T TIED IN 2012)
(DRIEST SINCE 0.12 IN 2025)
...SHERIDAN SEPTEMBER 2026 BROKEN OR TIED DAILY PRECIPITATION RECORDS...
NONE
...SHERIDAN AVERAGE TEMPERATURES...
MONTH 2026 VALUES NORMALS DEPARTURE RANKING
SEPTEMBER 62.2 59.1 +3.1 18TH WARMEST OUT OF 120 YEARS
(RECORD WARMEST WAS 66.2 IN 2024)
(WARMEST SINCE 66.2 IN 2024)
...SHERIDAN AVERAGE HIGH TEMPERATURES...
MONTH 2026 VALUES NORMALS DEPARTURE RANKING
SEPTEMBER 78.9 75.6 +3.3 20TH WARMEST OUT OF 120 YEARS
(RECORD WARMEST WAS 85.6 IN 2024)
(WARMEST SINCE 80.0 IN 2025)
...SHERIDAN SEPTEMBER 2026 BROKEN OR TIED WARMEST DAILY HIGH TEMPERATURE RECORDS...
NONE
...SHERIDAN SEPTEMBER 2026 BROKEN OR TIED COLDEST DAILY HIGH TEMPERATURE RECORDS...
NONE
...SHERIDAN AVERAGE LOW TEMPERATURES...
MONTH 2026 VALUES NORMALS DEPARTURE RANKING
SEPTEMBER 45.4 42.5 +2.9 TIED FOR THE 14TH WARMEST OUT OF 120 YEARS
(RECORD WARMEST WAS 50.6 IN 1963)
(WARMEST SINCE 46.7 IN 2024)
...SHERIDAN SEPTEMBER 2026 BROKEN OR TIED WARMEST DAILY LOW TEMPERATURE RECORDS...
NONE
...SHERIDAN SEPTEMBER 2026 BROKEN OR TIED COLDEST DAILY LOW TEMPERATURE RECORDS...
NONE
$$