Monthly outlook for Fairfield, CA: average high 87.6°, average low 58.2°. That is 0.2° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 0 days and 0.1 inches. The warmest day looks like 9 August (96.7°), the coolest 16 August (54.7°).
87.6°/58.2°
Average high / low
+0.2°
Above normal
0 / 0
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
85.7°
88°
-1.3°
18 August – 27 August
90.7°
86.3°
+2.5°
28 August – 6 September
at normal
88.1°
—
August records over 66 years
107.2°17 August 2020All-time high
51.3°23 August 1973All-time low
Sun, 0997° / 62°0
97 °
Fairfield, Sunday, 9 August
Clear. High 97°, low 62°.
Pressure29.80 inHg
Wind6.5 mph SW
Humidity19%
Visibility6.2 mi
Dew point46°
Mon, 1085° / 57°0
85 °
Fairfield, Monday, 10 August
Partly cloudy. High 85°, low 57°.
Pressure29.85 inHg
Wind9.9 mph SW
Humidity30%
Visibility6.2 mi
Dew point49°
Tue, 1189° / 56°0
89 °
Fairfield, Tuesday, 11 August
Clear. High 89°, low 56°.
Pressure29.91 inHg
Wind8.8 mph SW
Humidity29%
Visibility6.2 mi
Dew point49°
Wed, 1284° / 57°0
84 °
Fairfield, Wednesday, 12 August
Mostly clear. High 84°, low 57°.
Pressure29.83 inHg
Wind8.1 mph SW
Humidity32%
Visibility6.2 mi
Dew point50°
Thu, 1380° / 58°0
80 °
Fairfield, Thursday, 13 August
Clear. High 80°, low 58°.
Pressure29.83 inHg
Wind14.6 mph SW
Humidity41%
Visibility—
Dew point52°
Fri, 1480° / 61°0
80 °
Fairfield, Friday, 14 August
Overcast. High 80°, low 61°.
Pressure29.88 inHg
Wind10 mph SW
Humidity40%
Visibility—
Dew point51°
Sat, 1583° / 57°0
83 °
Fairfield, Saturday, 15 August
Clear. High 83°, low 57°.
Pressure29.97 inHg
Wind12.8 mph SW
Humidity32%
Visibility—
Dew point47°
Sun, 1688° / 55°0
88 °
Fairfield, Sunday, 16 August
Overcast. High 88°, low 55°.
Pressure29.97 inHg
Wind11.3 mph SW
Humidity21%
Visibility—
Dew point40°
Mon, 1783° / 59°0
83 °
Fairfield, Monday, 17 August
Overcast. High 83°, low 59°.
Pressure30.03 inHg
Wind11.8 mph SW
Humidity29%
Visibility—
Dew point45°
Tue, 1893° / 56°0
93 °
Fairfield, Tuesday, 18 August
Clear. High 93°, low 56°.
Pressure29.97 inHg
Wind11.4 mph SW
Humidity17%
Visibility—
Dew point38°
Wed, 1990° / 56°0
90 °
Fairfield, Wednesday, 19 August
Clear. High 90°, low 56°.
Pressure29.91 inHg
Wind12.7 mph SW
Humidity22%
Visibility—
Dew point43°
Thu, 2089° / 57°0
89 °
Fairfield, Thursday, 20 August
Clear. High 89°, low 57°.
Pressure29.88 inHg
Wind12.7 mph SW
Humidity27%
Visibility—
Dew point48°
Fri, 2195° / 58°0
95 °
Fairfield, Friday, 21 August
Clear. High 95°, low 58°.
Pressure29.83 inHg
Wind11.6 mph SW
Humidity22%
Visibility—
Dew point47°
Sat, 2294° / 60°0
94 °
Fairfield, Saturday, 22 August
Overcast. High 94°, low 60°.
Pressure29.80 inHg
Wind12.8 mph SW
Humidity21%
Visibility—
Dew point45°
Sun, 2383° / 59°0
83 °
Fairfield, Sunday, 23 August
Partly cloudy. High 83°, low 59°.
Pressure29.83 inHg
Wind13.8 mph SW
Humidity35%
Visibility—
Dew point50°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2487° / 58°0
87 °
Fairfield, Monday, 24 August
Climate normal for this date — 60-year average.
Average high87°
Average low58°
Average precipitation0 in
Chance of precipitation2%
Record high103° (2010)
Record low52° (1970)
Tue, 2586° / 58°0
86 °
Fairfield, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high86°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high104° (1972)
Record low53° (2021)
Wed, 2687° / 58°0
87 °
Fairfield, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high87°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high103° (1988)
Record low53° (1970)
Thu, 2788° / 59°0
88 °
Fairfield, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high88°
Average low59°
Average precipitation0 in
Chance of precipitation0%
Record high103° (2008)
Record low52° (2012)
Fri, 2889° / 59°0
89 °
Fairfield, Friday, 28 August
Climate normal for this date — 60-year average.
Average high89°
Average low59°
Average precipitation0 in
Chance of precipitation0%
Record high105° (2008)
Record low54° (1960)
Sat, 2988° / 59°0
88 °
Fairfield, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high88°
Average low59°
Average precipitation0 in
Chance of precipitation0%
Record high103° (1977)
Record low52° (1975)
Sun, 3087° / 59°0
87 °
Fairfield, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high87°
Average low59°
Average precipitation0 in
Chance of precipitation3%
Record high101° (2023)
Record low53° (1960)
Mon, 3188° / 58°0
88 °
Fairfield, Monday, 31 August
Climate normal for this date — 60-year average.
Average high88°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high101° (2017)
Record low52° (1970)
Tue, 0188° / 59°0
88 °
Fairfield, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high88°
Average low59°
Average precipitation0 in
Chance of precipitation3%
Record high106° (2017)
Record low53° (1970)
Wed, 0288° / 59°0
88 °
Fairfield, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high88°
Average low59°
Average precipitation0 in
Chance of precipitation0%
Record high105° (2017)
Record low53° (1960)
Thu, 0388° / 59°0
88 °
Fairfield, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high88°
Average low59°
Average precipitation0 in
Chance of precipitation0%
Record high100° (1963)
Record low50° (2000)
Fri, 0488° / 58°0
88 °
Fairfield, Friday, 4 September
Climate normal for this date — 60-year average.
Average high88°
Average low58°
Average precipitation0 in
Chance of precipitation0%
Record high105° (2022)
Record low50° (2000)
Sat, 0589° / 59°0
89 °
Fairfield, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high89°
Average low59°
Average precipitation0 in
Chance of precipitation0%
Record high112° (2022)
Record low52° (1965)
Sun, 0688° / 59°0
88 °
Fairfield, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high88°
Average low59°
Average precipitation0 in
Chance of precipitation2%
Record high114° (2022)
Record low51° (1973)
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Fairfield, CA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Fairfield, CA since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.