Millard County climate

Millard County Weather in September

NOAA 1991-2020 normals for Black Rock, 42.7 km from Millard County

Average highs run from 88°F on September 1 to 76°F on September 30, and lows from 49°F to 38°F. Normal precipitation for the month is 0.70 in over about 4 wet days.

September day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Millard County, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
83°F
Average low
44°F
Precipitation
0.70 in
Record high
106°FSep 6, 2022
Record low
21°FSep 20, 2003
Chance of a freeze
64%
Days of 90°F or more
4.8
Daylight
13 h 02 min to 11 h 48 min
Cloud cover
33%
Humidity
34%
Dew point
33°F
Wind
7.6 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Sep 188°F49°F104°F 202237°F 200514%0%
Sep 288°F49°F105°F 202232°F 197314%0%
Sep 387°F49°F105°F 202234°F 196414%0%
Sep 487°F48°F103°F 202232°F 200414%0%
Sep 587°F48°F102°F 202234°F 199914%0%
Sep 686°F48°F106°F 202238°F 200814%0%
Sep 786°F47°F104°F 202232°F 200114%0%
Sep 886°F47°F101°F 202236°F 194114%0%
Sep 985°F46°F98°F 199028°F 200114%0%
Sep 1085°F46°F96°F 199033°F 196214%0%
Sep 1185°F46°F98°F 199030°F 201014%0%
Sep 1284°F45°F98°F 199031°F 197414%0%
Sep 1384°F45°F96°F 199033°F 197814%0%
Sep 1483°F44°F98°F 199027°F 200314%0%
Sep 1583°F44°F99°F 200030°F 197014%0%
Sep 1683°F44°F97°F 200031°F 197013%0%
Sep 1782°F43°F97°F 200029°F 196513%0%
Sep 1882°F43°F94°F 193822°F 200313%0%
Sep 1981°F43°F95°F 195624°F 198813%0%
Sep 2081°F42°F91°F 200521°F 200313%0%
Sep 2180°F42°F92°F 202025°F 197813%0%
Sep 2280°F41°F92°F 196626°F 200413%0%
Sep 2379°F41°F93°F 193826°F 200613%0%
Sep 2479°F41°F95°F 200126°F 200013%0%
Sep 2579°F40°F93°F 193825°F 195813%0%
Sep 2678°F40°F97°F 193825°F 197013%0%
Sep 2778°F39°F101°F 193825°F 199613%0%
Sep 2877°F39°F94°F 202426°F 195913%0%
Sep 2977°F39°F97°F 202424°F 199913%0%
Sep 3076°F38°F93°F 202423°F 200713%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Millard County, in percent, and of at least 0.1 inch of snowfall.0510151102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (MDT).

September 1
sunrise 7:01 AM, sunset 8:03 PM
September 30
sunrise 7:28 AM, sunset 7:16 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00420730 (Black Rock), public domain. Records: NOAA GHCN-Daily, station USW00023162, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.