Altona climate

Altona Weather in September

NOAA 1991-2020 normals for Altona, 0.6 km from Altona

Average highs run from 80°F on September 1 to 71°F on September 30, and lows from 56°F to 46°F. Normal precipitation for the month is 3.81 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 Altona, in °F, with the record for each date.020406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
76°F
Average low
52°F
Precipitation
3.81 in
Record high
100°FSep 5, 1899
Record low
19°FSep 30, 1899
Chance of a freeze
15%
Days of 90°F or more
2.2
Daylight
13 h 06 min to 11 h 48 min
Cloud cover
48%
Humidity
71%
Dew point
55°F
Wind
8.9 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 180°F56°F99°F 195343°F 19090%
Sep 280°F56°F99°F 201143°F 19010%
Sep 380°F56°F96°F 190042°F 19080%
Sep 480°F56°F94°F 189939°F 19740%
Sep 579°F55°F100°F 189940°F 19020%
Sep 679°F55°F99°F 189943°F 19880%
Sep 779°F55°F99°F 193939°F 19860%
Sep 879°F54°F94°F 197141°F 19860%
Sep 978°F54°F96°F 189742°F 20080%
Sep 1078°F54°F96°F 201341°F 19020%
Sep 1178°F53°F94°F 200039°F 19400%
Sep 1278°F53°F95°F 189738°F 19020%
Sep 1377°F53°F97°F 189734°F 19020%
Sep 1477°F52°F97°F 193935°F 19020%
Sep 1577°F52°F98°F 193937°F 19040%
Sep 1677°F52°F90°F 190737°F 19370%
Sep 1776°F51°F96°F 190734°F 19000%
Sep 1876°F51°F93°F 197233°F 19010%
Sep 1976°F51°F93°F 194830°F 19010%
Sep 2075°F50°F91°F 194032°F 19910%
Sep 2175°F50°F94°F 202231°F 19010%
Sep 2275°F49°F92°F 198833°F 19740%
Sep 2374°F49°F92°F 201733°F 19830%
Sep 2474°F49°F92°F 201733°F 19420%
Sep 2573°F48°F90°F 200733°F 19420%
Sep 2673°F48°F92°F 189732°F 19840%
Sep 2773°F47°F89°F 201732°F 18990%
Sep 2872°F47°F93°F 195327°F 19420%
Sep 2972°F47°F97°F 195327°F 18990%
Sep 3071°F46°F90°F 195219°F 18990%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Altona, 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 (CDT).

September 1
sunrise 6:27 AM, sunset 7:33 PM
September 30
sunrise 6:56 AM, sunset 6:44 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00110140 (Altona), public domain. Records: NOAA GHCN-Daily, station USC00113320, 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.