Delta County climate

Delta County Weather in September

NOAA 1991-2020 normals for Rapid Rvr 4SSE, 10.9 km from Delta County

Average highs run from 74°F on September 1 to 62°F on September 30, and lows from 53°F to 41°F. Normal precipitation for the month is 3.43 in.

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 County, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
68°F
Average low
48°F
Precipitation
3.43 in
Record high
96°FSep 1, 1953
Record low
24°FSep 28, 1893
Chance of a freeze
35%
Daylight
13 h 16 min to 11 h 44 min
Cloud cover
68%
Humidity
80%
Dew point
52°F
Wind
6.0 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 174°F53°F96°F 195329°F 18880%
Sep 273°F53°F86°F 189835°F 19760%
Sep 373°F53°F86°F 193734°F 19460%
Sep 473°F52°F86°F 189535°F 19970%
Sep 573°F52°F89°F 189535°F 19970%
Sep 672°F52°F91°F 197838°F 18850%
Sep 772°F52°F86°F 196036°F 19860%
Sep 872°F51°F86°F 190634°F 19950%
Sep 971°F51°F87°F 193130°F 18830%
Sep 1071°F50°F82°F 196131°F 19950%
Sep 1170°F50°F88°F 188832°F 19950%
Sep 1270°F50°F82°F 188934°F 19230%
Sep 1370°F49°F82°F 200532°F 19230%
Sep 1469°F49°F84°F 192731°F 18990%
Sep 1569°F48°F87°F 192733°F 20070%
Sep 1668°F48°F81°F 188031°F 20070%
Sep 1768°F47°F81°F 189530°F 18930%
Sep 1868°F47°F82°F 189134°F 19030%
Sep 1967°F47°F82°F 193333°F 19930%
Sep 2067°F46°F86°F 189131°F 18930%
Sep 2166°F46°F83°F 189531°F 19040%
Sep 2266°F45°F84°F 189530°F 18780%
Sep 2365°F45°F83°F 192227°F 19950%
Sep 2465°F44°F78°F 189126°F 19950%
Sep 2564°F44°F80°F 189727°F 19470%
Sep 2664°F43°F80°F 193826°F 19260%
Sep 2763°F43°F82°F 189229°F 19420%
Sep 2863°F42°F78°F 189524°F 18930%
Sep 2962°F42°F80°F 190426°F 18830%
Sep 3062°F41°F78°F 189729°F 18990%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Delta County, 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 (EDT).

September 1
sunrise 7:09 AM, sunset 8:25 PM
September 30
sunrise 7:45 AM, sunset 7:29 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00206840 (Rapid Rvr 4SSE), public domain. Records: NOAA GHCN-Daily, station USW00014824, 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.