Climatological Report (Monthly)
Issued by NWS Billings, MT
Issued by NWS Billings, MT
344
CXUS55 KBYZ 011044
CLMMLS
CLIMATE REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
441 AM MDT THU OCT 01 2026
...................................
...THE MILES CITY MT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2026...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1937 TO 2026
WEATHER OBSERVED NORMAL DEPART
VALUE DATE(S) VALUE FROM
NORMAL
................................................
TEMPERATURE (F)
HIGHEST 99 09/04
LOWEST 40 09/27
AVG. MAXIMUM 78.6 75.6 3.0
AVG. MINIMUM 51.7 46.9 4.8
MEAN 65.2 61.2 4.0
DAYS MAX >= 90 4
DAYS MAX <= 32 0
DAYS MIN <= 32 0
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
TOTALS 2.30 1.07 1.23
DAYS >= .01 4
DAYS >= .10 2
DAYS >= .50 2
DAYS >= 1.00 1
GREATEST
24 HR. TOTAL 1.57 09/19 TO 09/19
DEGREE DAYS
HEATING TOTAL 79 176 -97
SINCE 7/1 90 211 -121
COOLING TOTAL 90 64 26
SINCE 1/1 955 727 228
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WIND (MPH)
AVERAGE WIND SPEED 10.0
HIGHEST WIND SPEED/DIRECTION 38/300 DATE 09/14
HIGHEST GUST SPEED/DIRECTION 53/290 DATE 09/14
AVERAGE RH (PERCENT) 59
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 5 MIXED PRECIP 0
HEAVY RAIN 2 RAIN 2
LIGHT RAIN 13 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 6 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.
&&
THIS IS AN AUTOMATED...UNATTENDED WEATHER STATION AND MAY
UNDERESTIMATE WINTER PRECIPITATION.
...SEPTEMBER 2026 MONTH IN REVIEW FOR MILES CITY...
BELOW IS A SUMMARY OF THE TEMPERATURE AND PRECIPITATION
STATISTICS FOR MILES CITY 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 FEBRUARY 1937 AT THE MILES CITY AIRPORT.
NUMBERS DENOTED WITH AN * IS MISSING DATA IN THE CALCULATION.
...MILES CITY MONTHLY PRECIPITATION...
MONTH 2026 VALUES NORMALS DEPARTURE RANKING
SEPTEMBER 2.30 1.07 +1.23 12TH WETTEST OUT OF 90 YEARS
(RECORD WETTEST WAS 4.67 IN 1941)
(WETTEST SINCE 2.40 IN 2023)
...MILES CITY SEPTEMBER 2026 BROKEN OR TIED DAILY PRECIPITATION RECORDS...
1.57 ON SEPTEMBER 19 (OLD RECORD 0.96 IN 1985)
0.69 ON SEPTEMBER 20 (OLD RECORD 0.54 IN 2018)
NOTE: SINCE THE LATE 1990S...MILES CITY BECAME AN AUTOMATED AND UNATTENDED
WEATHER STATION. PRECIPITATION AMOUNTS IN THE WINTER MAY BE UNDERESTIMATED.
...MILES CITY AVERAGE TEMPERATURES...
MONTH 2026 VALUES NORMALS DEPARTURE RANKING
SEPTEMBER 65.2 61.2 +4.0 18TH WARMEST OUT OF 90 YEARS
(RECORD WARMEST WAS 69.4 IN 1998)
(WARMEST SINCE 66.0 IN 2025)
...MILES CITY AVERAGE HIGH TEMPERATURES...
MONTH 2026 VALUES NORMALS DEPARTURE RANKING
SEPTEMBER 78.6 75.6 +3.0 23RD WARMEST OUT OF 90 YEARS
(RECORD WARMEST WAS 84.3 IN 1998)
(WARMEST SINCE 81.7 IN 2025)
...MILES CITY SEPTEMBER 2026 BROKEN OR TIED WARMEST DAILY HIGH TEMPERATURE RECORDS...
NONE
...MILES CITY SEPTEMBER 2026 BROKEN OR TIED COLDEST DAILY HIGH TEMPERATURE RECORDS...
NONE
...MILES CITY AVERAGE LOW TEMPERATURES...
MONTH 2026 VALUES NORMALS DEPARTURE RANKING
SEPTEMBER 51.7 46.9 +4.8 TIED FOR THE 8TH WARMEST OUT OF 90 YEARS
(RECORD WARMEST WAS 54.5 IN 1998)
(WARMEST SINCE 52.7 IN 2023)
...MILES CITY SEPTEMBER 2026 BROKEN OR TIED WARMEST DAILY LOW TEMPERATURE RECORDS...
58 ON SEPTEMBER 19 (TIED RECORD IN 1969)
55 ON SEPTEMBER 23 (OLD RECORD 54 IN 1953)
...MILES CITY SEPTEMBER 2026 BROKEN OR TIED COLDEST DAILY LOW TEMPERATURE RECORDS...
NONE
$$