Johnston climate

Johnston Weather in August

NOAA 1991-2020 normals for Providence T F Green AP, 12.7 km from Johnston

Average highs run from 84°F on August 1 to 80°F on August 31, and lows from 66°F to 62°F. Normal precipitation for the month is 3.59 in over about 9 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 Johnston, in °F, with the record for each date.406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
82°F
Average low
64°F
Precipitation
3.59 in
Record high
97°FAug 3, 2006
Record low
43°FAug 18, 2014
Chance of a freeze
0%
Days of 90°F or more
3.4
Daylight
14 h 24 min to 13 h 10 min
Cloud cover
56%
Humidity
73%
Dew point
61°F
Wind
4.3 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°F66°F92°F 201953°F 201431%0%
Aug 284°F65°F95°F 200657°F 201031%0%
Aug 384°F65°F97°F 200656°F 201631%0%
Aug 484°F65°F95°F 200654°F 201431%0%
Aug 584°F65°F93°F 201253°F 201331%0%
Aug 683°F65°F96°F 200550°F 201331%0%
Aug 783°F65°F94°F 201850°F 200431%0%
Aug 883°F65°F92°F 201846°F 201331%0%
Aug 983°F65°F91°F 200552°F 200931%0%
Aug 1083°F65°F94°F 202054°F 201331%0%
Aug 1183°F65°F94°F 202049°F 200730%0%
Aug 1283°F65°F94°F 201649°F 200630%0%
Aug 1383°F65°F94°F 201649°F 200630%0%
Aug 1483°F64°F96°F 200551°F 200630%0%
Aug 1583°F64°F94°F 200546°F 201430%0%
Aug 1682°F64°F91°F 201552°F 201330%0%
Aug 1782°F64°F91°F 200954°F 201730%0%
Aug 1882°F64°F93°F 201543°F 201429%0%
Aug 1982°F64°F93°F 201547°F 200729%0%
Aug 2082°F64°F92°F 201948°F 200829%0%
Aug 2182°F63°F88°F 200450°F 200729%0%
Aug 2282°F63°F90°F 200953°F 200429%0%
Aug 2381°F63°F91°F 202052°F 200428%0%
Aug 2481°F63°F91°F 202052°F 200428%0%
Aug 2581°F63°F89°F 202051°F 200428%0%
Aug 2681°F63°F93°F 200747°F 200428%0%
Aug 2781°F62°F91°F 201647°F 200428%0%
Aug 2880°F62°F89°F 201648°F 201728%0%
Aug 2980°F62°F95°F 201848°F 201728%0%
Aug 3080°F62°F96°F 201851°F 201428%0%
Aug 3180°F62°F91°F 201049°F 200628%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Johnston, 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 5:40 AM, sunset 8:04 PM
August 31
sunrise 6:11 AM, sunset 7:21 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00014765 (Providence T F Green AP), public domain. Records: NOAA GHCN-Daily, station USC00379423, 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.