Jefferson County climate

Jefferson County Weather in August

NOAA 1991-2020 normals for Hamer 4 Nw, 16.7 km from Jefferson County

Average highs run from 90°F on August 1 to 84°F on August 31, and lows from 50°F to 43°F. Normal precipitation for the month is 0.51 in over about 4 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 Jefferson County, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
87°F
Average low
47°F
Precipitation
0.51 in
Record high
101°FAug 1, 2026
Record low
28°FAug 26, 1992
Chance of a freeze
14%
Days of 90°F or more
11.8
Daylight
14 h 34 min to 13 h 14 min
Cloud cover
41%
Humidity
40%
Dew point
39°F
Wind
7.2 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 190°F50°F101°F 202637°F 200213%0%
Aug 290°F50°F100°F 202442°F 196313%0%
Aug 390°F50°F100°F 202442°F 196313%0%
Aug 490°F50°F100°F 196136°F 198013%0%
Aug 590°F50°F97°F 196138°F 198013%0%
Aug 690°F50°F98°F 198342°F 195013%0%
Aug 790°F49°F100°F 198340°F 195013%0%
Aug 889°F49°F99°F 199039°F 200412%0%
Aug 989°F49°F96°F 199136°F 200212%0%
Aug 1089°F49°F98°F 196937°F 200212%0%
Aug 1189°F49°F98°F 201841°F 198012%0%
Aug 1289°F48°F97°F 195837°F 200012%0%
Aug 1388°F48°F96°F 200339°F 200612%0%
Aug 1488°F48°F99°F 200337°F 200612%0%
Aug 1588°F48°F98°F 200338°F 200512%0%
Aug 1688°F47°F96°F 202237°F 197412%0%
Aug 1787°F47°F99°F 202336°F 200212%0%
Aug 1887°F47°F97°F 202235°F 197812%0%
Aug 1987°F47°F97°F 196134°F 200212%0%
Aug 2087°F46°F98°F 202634°F 196412%0%
Aug 2186°F46°F97°F 202635°F 196412%0%
Aug 2286°F46°F98°F 196936°F 195412%0%
Aug 2386°F45°F97°F 196936°F 198512%0%
Aug 2486°F45°F98°F 196934°F 199212%0%
Aug 2585°F45°F97°F 201530°F 199212%0%
Aug 2685°F45°F97°F 201028°F 199212%0%
Aug 2785°F44°F93°F 198133°F 196412%0%
Aug 2884°F44°F94°F 201233°F 196012%0%
Aug 2984°F44°F95°F 194832°F 196012%0%
Aug 3084°F43°F99°F 195431°F 196412%0%
Aug 3184°F43°F97°F 202230°F 196512%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Jefferson 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).

August 1
sunrise 6:18 AM, sunset 8:52 PM
August 31
sunrise 6:52 AM, sunset 8:06 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00103964 (Hamer 4 Nw), public domain. Records: NOAA GHCN-Daily, station USW00024145, 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.