Green Valley climate

Green Valley Weather in August

NOAA 1991-2020 normals for Mason City 4SE, 27.1 km from Green Valley

Average highs run from 84°F on August 1 to 82°F on August 31, and lows from 64°F to 59°F. Normal precipitation for the month is 3.57 in over about 8 wet days.

August day by day

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

Normal daily high and low temperature at Green Valley, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
84°F
Average low
62°F
Precipitation
3.57 in
Record high
103°FAug 17, 1988
Record low
41°FAug 28, 1986
Chance of a freeze
0%
Days of 90°F or more
6.7
Daylight
14 h 17 min to 13 h 07 min
Cloud cover
49%
Humidity
72%
Dew point
63°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
Aug 184°F64°F101°F 198852°F 196227%0%
Aug 284°F64°F101°F 194754°F 199027%0%
Aug 384°F64°F100°F 194749°F 197627%0%
Aug 484°F64°F99°F 194750°F 197227%0%
Aug 584°F64°F98°F 194751°F 194827%0%
Aug 684°F64°F100°F 194750°F 199427%0%
Aug 784°F64°F97°F 201250°F 198926%0%
Aug 884°F63°F100°F 198848°F 197626%0%
Aug 984°F63°F96°F 200148°F 197226%0%
Aug 1084°F63°F97°F 194449°F 197226%0%
Aug 1184°F63°F96°F 198849°F 200425%0%
Aug 1284°F63°F97°F 198847°F 197925%0%
Aug 1384°F63°F96°F 194449°F 196425%0%
Aug 1484°F63°F96°F 198847°F 200425%0%
Aug 1584°F63°F102°F 198845°F 197925%0%
Aug 1684°F62°F102°F 198851°F 200425%0%
Aug 1784°F62°F103°F 198852°F 199224%0%
Aug 1884°F62°F101°F 198345°F 196324%0%
Aug 1983°F62°F100°F 198351°F 195024%0%
Aug 2083°F62°F102°F 198343°F 195024%0%
Aug 2183°F62°F99°F 198345°F 195024%0%
Aug 2283°F61°F100°F 194752°F 195024%0%
Aug 2383°F61°F101°F 194750°F 194524%0%
Aug 2483°F61°F99°F 202349°F 196624%0%
Aug 2583°F61°F97°F 198347°F 195823%0%
Aug 2683°F61°F98°F 200348°F 196423%0%
Aug 2783°F60°F99°F 202448°F 198623%0%
Aug 2883°F60°F96°F 201341°F 198623%0%
Aug 2983°F60°F96°F 198443°F 198623%0%
Aug 3083°F59°F99°F 201346°F 194623%0%
Aug 3182°F59°F96°F 194344°F 196723%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Green Valley, in percent, and of at least 0.1 inch of snowfall.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

August 1
sunrise 5:56 AM, sunset 8:13 PM
August 31
sunrise 6:25 AM, sunset 7:32 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00115413 (Mason City 4SE), public domain. Records: NOAA GHCN-Daily, station USW00014842, 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.