Fairfield climate

Fairfield Weather in August

NOAA 1991-2020 normals for Rosalia, 22.1 km from Fairfield

Average highs run from 89°F on August 1 to 81°F on August 31, and lows from 53°F to 48°F. Normal precipitation for the month is 0.42 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 Fairfield, 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
51°F
Precipitation
0.42 in
Record high
107°FAug 10, 2018
Record low
40°FAug 28, 2000
Chance of a freeze
1%
Days of 90°F or more
10.3
Daylight
14 h 55 min to 13 h 23 min
Cloud cover
40%
Humidity
49%
Dew point
46°F
Wind
5.4 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 189°F53°F102°F 200946°F 200210%0%
Aug 289°F53°F105°F 202450°F 200610%0%
Aug 389°F53°F98°F 202144°F 200210%0%
Aug 488°F53°F99°F 201448°F 202610%0%
Aug 588°F53°F98°F 200548°F 200210%0%
Aug 688°F53°F98°F 200849°F 200210%0%
Aug 788°F53°F99°F 201943°F 200211%0%
Aug 888°F52°F99°F 201848°F 200210%0%
Aug 988°F52°F106°F 201852°F 202111%0%
Aug 1088°F52°F107°F 201851°F 202011%0%
Aug 1187°F52°F100°F 201448°F 200711%0%
Aug 1287°F52°F101°F 200146°F 200011%0%
Aug 1387°F52°F103°F 201547°F 200511%0%
Aug 1487°F52°F100°F 200447°F 202011%0%
Aug 1586°F51°F105°F 202347°F 200911%0%
Aug 1686°F51°F104°F 202048°F 200011%0%
Aug 1786°F51°F104°F 200843°F 200211%0%
Aug 1886°F51°F102°F 202249°F 200211%0%
Aug 1985°F51°F97°F 201247°F 200211%0%
Aug 2085°F50°F98°F 200945°F 200011%0%
Aug 2185°F50°F100°F 200646°F 200011%0%
Aug 2284°F50°F95°F 202546°F 200011%0%
Aug 2384°F50°F98°F 202546°F 201511%0%
Aug 2484°F50°F100°F 202546°F 200511%0%
Aug 2583°F49°F101°F 202544°F 201211%0%
Aug 2683°F49°F95°F 201546°F 200111%0%
Aug 2783°F49°F96°F 202345°F 200712%0%
Aug 2882°F49°F99°F 200940°F 200012%0%
Aug 2982°F48°F100°F 201742°F 201012%0%
Aug 3082°F48°F95°F 202545°F 201012%0%
Aug 3181°F48°F103°F 202241°F 200612%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Fairfield, 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 (PDT).

August 1
sunrise 5:27 AM, sunset 8:22 PM
August 31
sunrise 6:07 AM, sunset 7:30 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00457180 (Rosalia), public domain. Records: NOAA GHCN-Daily, station USW00094176, 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.