Riverside climate

Riverside Weather in August

NOAA 1991-2020 normals for Sunbury, 17.6 km from Riverside

Average highs run from 84°F on August 1 to 80°F on August 31, and lows from 61°F to 57°F. Normal precipitation for the month is 3.93 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 Riverside, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
82°F
Average low
59°F
Precipitation
3.93 in
Record high
99°FAug 20, 2022
Record low
37°FAug 27, 2017
Chance of a freeze
0%
Days of 90°F or more
3.0
Daylight
14 h 19 min to 13 h 08 min
Cloud cover
59%
Humidity
72%
Dew point
60°F
Wind
3.4 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°F61°F90°F 201150°F 201737%0%
Aug 284°F61°F96°F 201754°F 202137%0%
Aug 384°F61°F92°F 201752°F 202137%0%
Aug 484°F61°F91°F 202250°F 201737%0%
Aug 584°F60°F89°F 202251°F 201337%0%
Aug 684°F60°F89°F 201651°F 201736%0%
Aug 783°F60°F88°F 201653°F 200936%0%
Aug 883°F60°F92°F 202253°F 201536%0%
Aug 983°F60°F92°F 201552°F 200836%0%
Aug 1083°F60°F90°F 200949°F 201436%0%
Aug 1183°F60°F91°F 202152°F 201936%0%
Aug 1283°F60°F92°F 202151°F 201135%0%
Aug 1383°F60°F94°F 201651°F 200835%0%
Aug 1483°F60°F88°F 201647°F 201335%0%
Aug 1583°F60°F87°F 201546°F 201335%0%
Aug 1682°F60°F88°F 201546°F 201335%0%
Aug 1782°F60°F95°F 201851°F 200834%0%
Aug 1882°F59°F92°F 201852°F 201434%0%
Aug 1982°F59°F88°F 202252°F 202034%0%
Aug 2082°F59°F99°F 202245°F 200834%0%
Aug 2182°F59°F87°F 202145°F 202434%0%
Aug 2282°F59°F89°F 202047°F 202433%0%
Aug 2381°F58°F89°F 202048°F 202433%0%
Aug 2481°F58°F88°F 202050°F 201933%0%
Aug 2581°F58°F90°F 202151°F 201333%0%
Aug 2681°F58°F89°F 202147°F 200832%0%
Aug 2781°F58°F92°F 202037°F 201732%0%
Aug 2880°F57°F90°F 201837°F 201732%0%
Aug 2980°F57°F90°F 201847°F 201432%0%
Aug 3080°F57°F88°F 201049°F 201131%0%
Aug 3180°F57°F90°F 201050°F 200831%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Riverside, 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 6:03 AM, sunset 8:22 PM
August 31
sunrise 6:32 AM, sunset 7:40 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00368668 (Sunbury), public domain. Records: NOAA GHCN-Daily, station USC00360457, 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.