Jefferson County climate

Jefferson County Weather in August

NOAA 1991-2020 normals for Watertown Intl AP, 2.5 km from Jefferson County

Average highs run from 79°F on August 1 to 76°F on August 31, and lows from 59°F to 54°F. Normal precipitation for the month is 3.20 in over about 11 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.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
78°F
Average low
57°F
Precipitation
3.20 in
Record high
96°FAug 19, 1955
Record low
30°FAug 27, 1969
Chance of a freeze
0%
Days of 90°F or more
0.7
Daylight
14 h 36 min to 13 h 16 min
Cloud cover
57%
Humidity
77%
Dew point
61°F
Wind
6.9 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
Aug 179°F59°F91°F 195542°F 199834%0%
Aug 279°F59°F91°F 195543°F 202534%0%
Aug 379°F59°F95°F 198843°F 196234%0%
Aug 479°F59°F95°F 201244°F 197234%0%
Aug 579°F59°F92°F 198838°F 197234%0%
Aug 679°F59°F94°F 195537°F 196434%0%
Aug 779°F58°F94°F 196540°F 200434%0%
Aug 879°F58°F92°F 196643°F 198934%0%
Aug 979°F58°F95°F 196644°F 199934%0%
Aug 1079°F58°F94°F 197043°F 198334%0%
Aug 1179°F58°F92°F 197042°F 196834%0%
Aug 1279°F58°F91°F 202539°F 200634%0%
Aug 1379°F58°F88°F 198839°F 197934%0%
Aug 1479°F57°F94°F 200239°F 196134%0%
Aug 1579°F57°F93°F 197841°F 197234%0%
Aug 1678°F57°F90°F 194939°F 197934%0%
Aug 1778°F57°F93°F 198740°F 196134%0%
Aug 1878°F57°F90°F 201541°F 198434%0%
Aug 1978°F56°F96°F 195537°F 199834%0%
Aug 2078°F56°F89°F 201639°F 200034%0%
Aug 2178°F56°F86°F 197438°F 196934%0%
Aug 2278°F56°F88°F 197434°F 198833%0%
Aug 2378°F56°F86°F 202538°F 197333%0%
Aug 2478°F55°F88°F 196839°F 198733%0%
Aug 2577°F55°F90°F 197536°F 198933%0%
Aug 2677°F55°F87°F 195939°F 196933%0%
Aug 2777°F55°F90°F 199330°F 196933%0%
Aug 2877°F54°F90°F 195238°F 198233%0%
Aug 2977°F54°F90°F 197734°F 198233%0%
Aug 3077°F54°F92°F 195338°F 199933%0%
Aug 3176°F54°F91°F 199334°F 197633%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.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

August 1
sunrise 5:52 AM, sunset 8:28 PM
August 31
sunrise 6:26 AM, sunset 7:42 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00094790 (Watertown Intl AP), public domain. Records: NOAA GHCN-Daily, station USW00094790, 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.