Delta climate

Delta Weather in September

NOAA 1991-2020 normals for Delta 3E, 3.8 km from Delta

Average highs run from 87°F on September 1 to 76°F on September 30, and lows from 52°F to 41°F.

September day by day

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

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

September at a glance

Average high
82°F
Average low
47°F
Record high
100°FSep 6, 2022
Record low
29°FSep 25, 2000
Chance of a freeze
22%
Days of 90°F or more
4.8
Daylight
13 h 00 min to 11 h 49 min
Cloud cover
45%
Humidity
44%
Dew point
35°F
Wind
6.3 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 187°F52°F96°F 202243°F 20050%
Sep 287°F52°F97°F 201943°F 20050%
Sep 386°F51°F98°F 201944°F 20080%
Sep 486°F51°F98°F 202240°F 20080%
Sep 586°F51°F98°F 201738°F 20040%
Sep 685°F50°F100°F 202241°F 20080%
Sep 785°F50°F100°F 202239°F 20100%
Sep 885°F50°F99°F 202242°F 20080%
Sep 984°F49°F97°F 202233°F 20010%
Sep 1084°F49°F95°F 202136°F 20010%
Sep 1184°F49°F98°F 201739°F 20030%
Sep 1283°F48°F99°F 200938°F 20100%
Sep 1383°F48°F91°F 201539°F 20080%
Sep 1483°F48°F92°F 200039°F 20080%
Sep 1582°F47°F95°F 200039°F 20050%
Sep 1682°F47°F95°F 200034°F 20030%
Sep 1782°F47°F93°F 201832°F 20060%
Sep 1881°F46°F94°F 201832°F 20060%
Sep 1981°F46°F93°F 201834°F 20030%
Sep 2080°F45°F92°F 201039°F 20020%
Sep 2180°F45°F92°F 201036°F 20210%
Sep 2279°F45°F89°F 200831°F 20090%
Sep 2379°F44°F88°F 200132°F 20060%
Sep 2479°F44°F89°F 200132°F 20060%
Sep 2578°F43°F89°F 201529°F 20000%
Sep 2678°F43°F90°F 201433°F 20000%
Sep 2777°F42°F91°F 202434°F 20060%
Sep 2877°F42°F91°F 201532°F 20130%
Sep 2976°F42°F92°F 200132°F 20200%
Sep 3076°F41°F90°F 202434°F 20070%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Delta, in percent, and of at least 0.1 inch of snowfall.00.21102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (MDT).

September 1
sunrise 6:42 AM, sunset 7:42 PM
September 30
sunrise 7:07 AM, sunset 6:56 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00052196 (Delta 3E), public domain. Records: NOAA GHCN-Daily, station USC00052196, 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.