Riverside climate

Riverside Weather in August

NOAA 1991-2020 normals for Blackfoot Fire Dept, 7.3 km from Riverside

Average highs run from 89°F on August 1 to 82°F on August 31, and lows from 57°F to 51°F. Normal precipitation for the month is 0.60 in over about 3 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.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
86°F
Average low
54°F
Precipitation
0.60 in
Record high
104°FAug 2, 1969
Record low
30°FAug 25, 1992
Chance of a freeze
1%
Days of 90°F or more
10.5
Daylight
14 h 31 min to 13 h 13 min
Cloud cover
41%
Humidity
36%
Dew point
39°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 189°F57°F103°F 202640°F 200111%0%
Aug 289°F57°F104°F 196943°F 199111%0%
Aug 389°F57°F102°F 202443°F 198111%0%
Aug 488°F57°F102°F 199440°F 198011%0%
Aug 588°F56°F99°F 199439°F 198011%0%
Aug 688°F56°F102°F 200143°F 195011%0%
Aug 788°F56°F103°F 199035°F 199611%0%
Aug 888°F56°F104°F 199040°F 199611%0%
Aug 988°F56°F99°F 197235°F 199511%0%
Aug 1088°F56°F102°F 201839°F 200210%0%
Aug 1187°F55°F100°F 199639°F 194710%0%
Aug 1287°F55°F101°F 194042°F 198510%0%
Aug 1387°F55°F99°F 200340°F 196610%0%
Aug 1487°F55°F102°F 200338°F 198510%0%
Aug 1587°F55°F101°F 200335°F 197410%0%
Aug 1686°F54°F97°F 195839°F 196810%0%
Aug 1786°F54°F100°F 202038°F 200910%0%
Aug 1886°F54°F98°F 194037°F 197810%0%
Aug 1986°F54°F99°F 199235°F 199511%0%
Aug 2085°F54°F100°F 202635°F 196411%0%
Aug 2185°F53°F101°F 202637°F 196611%0%
Aug 2285°F53°F98°F 199134°F 196611%0%
Aug 2384°F53°F97°F 196736°F 197811%0%
Aug 2484°F53°F98°F 198835°F 201011%0%
Aug 2584°F52°F98°F 198130°F 199211%0%
Aug 2683°F52°F100°F 201031°F 199211%0%
Aug 2783°F52°F96°F 201234°F 199311%0%
Aug 2883°F52°F97°F 201234°F 201812%0%
Aug 2983°F51°F97°F 199034°F 201812%0%
Aug 3082°F51°F98°F 195433°F 196512%0%
Aug 3182°F51°F98°F 202232°F 196912%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.02.557.51012.51102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (MDT).

August 1
sunrise 6:20 AM, sunset 8:51 PM
August 31
sunrise 6:53 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 USC00100915 (Blackfoot Fire Dept), public domain. Records: NOAA GHCN-Daily, station USW00024156, 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.