As of 22:34 PDT

Weather in Rio Vista, CA

69°

Rio Vista, Saturday, 8 August, 22:34

Clear. Feels like 68°. High 92°, low 63°.

Pressure29.80 inHg

Wind13.7 mph SW

Humidity63%

Visibility6.2 mi

Dew point56°

See detailed hourly forecast

Monthly outlook for Rio Vista, CA: average high 90.7°, average low 60.3°. That is 3° 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 (98.8°), the coolest 20 August (56°).

90.7°/60.3°

Average high / low

+3°

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	91.5°	86°	+3°
18 August – 27 August	89.4°	84.5°	+2.7°
28 August – 6 September	at normal	86.1°	—

August records over 66 years

107.6°16 August 2020All-time high

52.3°29 August 1980All-time low

Climate normals and records are computed from the nearest reference point — Antioch (15 mi).

Sun, 0999° / 64°

99 °

Rio Vista, Sunday, 9 August

Clear. High 99°, low 64°.

Pressure29.80 inHg

Wind5.9 mph W

Humidity16%

Visibility6.2 mi

Dew point43°

Mon, 1097° / 65°

97 °

Rio Vista, Monday, 10 August

Overcast. High 97°, low 65°.

Pressure29.83 inHg

Wind7.8 mph W

Humidity20%

Visibility6.2 mi

Dew point45°

Tue, 1197° / 60°

97 °

Rio Vista, Tuesday, 11 August

Clear. High 97°, low 60°.

Pressure29.88 inHg

Wind6.6 mph W

Humidity21%

Visibility6.2 mi

Dew point45°

Wed, 1293° / 61°

93 °

Rio Vista, Wednesday, 12 August

Overcast. High 93°, low 61°.

Pressure29.83 inHg

Wind7.2 mph W

Humidity25%

Visibility6.2 mi

Dew point47°

Thu, 1389° / 61°

89 °

Rio Vista, Thursday, 13 August

Partly cloudy. High 89°, low 61°.

Pressure29.77 inHg

Wind20.4 mph W

Humidity26%

Visibility—

Dew point47°

Fri, 1488° / 60°

88 °

Rio Vista, Friday, 14 August

Clear. High 88°, low 60°.

Pressure29.88 inHg

Wind20.8 mph W

Humidity27%

Visibility—

Dew point47°

Sat, 1589° / 61°

89 °

Rio Vista, Saturday, 15 August

Clear. High 89°, low 61°.

Pressure29.97 inHg

Wind19.7 mph W

Humidity25%

Visibility—

Dew point46°

Sun, 1688° / 60°

88 °

Rio Vista, Sunday, 16 August

Overcast. High 88°, low 60°.

Pressure30.00 inHg

Wind19.5 mph W

Humidity23%

Visibility—

Dew point42°

Mon, 1784° / 62°

84 °

Rio Vista, Monday, 17 August

Overcast. High 84°, low 62°.

Pressure30.00 inHg

Wind15.6 mph W

Humidity27%

Visibility—

Dew point44°

Tue, 1890° / 63°

90 °

Rio Vista, Tuesday, 18 August

Overcast. High 90°, low 63°.

Pressure29.97 inHg

Wind18.4 mph SW

Humidity18%

Visibility—

Dew point38°

Wed, 1991° / 57°

91 °

Rio Vista, Wednesday, 19 August

Clear. High 91°, low 57°.

Pressure29.91 inHg

Wind18.7 mph W

Humidity18%

Visibility—

Dew point38°

Thu, 2088° / 56°

88 °

Rio Vista, Thursday, 20 August

Overcast. High 88°, low 56°.

Pressure29.85 inHg

Wind15.7 mph W

Humidity21%

Visibility—

Dew point40°

Fri, 2194° / 56°

94 °

Rio Vista, Friday, 21 August

Partly cloudy. High 94°, low 56°.

Pressure29.80 inHg

Wind21 mph W

Humidity17%

Visibility—

Dew point39°

Sat, 2284° / 58°

84 °

Rio Vista, Saturday, 22 August

Partly cloudy. High 84°, low 58°.

Pressure29.91 inHg

Wind19.6 mph W

Humidity32%

Visibility—

Dew point48°

Sun, 2389° / 58°

89 °

Rio Vista, Sunday, 23 August

Clear. High 89°, low 58°.

Pressure29.88 inHg

Wind18.9 mph W

Humidity25%

Visibility—

Dew point45°

From day 17 onward the outlook is built from 60-year climate statistics

Mon, 2485° / 59°

85 °

Rio Vista, Monday, 24 August

Climate normal for this date — 60-year average.

Average high85°

Average low59°

Average precipitation0 in

Chance of precipitation0%

Record high99° (2010)

Record low53° (1970)

Tue, 2585° / 59°

85 °

Rio Vista, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high85°

Average low59°

Average precipitation0 in

Chance of precipitation0%

Record high99° (2010)

Record low54° (1960)

Wed, 2685° / 58°

85 °

Rio Vista, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high85°

Average low58°

Average precipitation0 in

Chance of precipitation0%

Record high99° (2017)

Record low54° (1970)

Thu, 2786° / 59°

86 °

Rio Vista, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high86°

Average low59°

Average precipitation0 in

Chance of precipitation0%

Record high103° (2017)

Record low53° (1960)

Fri, 2887° / 60°

87 °

Rio Vista, Friday, 28 August

Climate normal for this date — 60-year average.

Average high87°

Average low60°

Average precipitation0 in

Chance of precipitation0%

Record high102° (2021)

Record low54° (1960)

Sat, 2985° / 59°

85 °

Rio Vista, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high85°

Average low59°

Average precipitation0 in

Chance of precipitation0%

Record high99° (2009)

Record low52° (1980)

Sun, 3085° / 60°

85 °

Rio Vista, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high85°

Average low60°

Average precipitation0 in

Chance of precipitation3%

Record high99° (2025)

Record low53° (2010)

Mon, 3186° / 59°

86 °

Rio Vista, Monday, 31 August

Climate normal for this date — 60-year average.

Average high86°

Average low59°

Average precipitation0 in

Chance of precipitation0%

Record high100° (2025)

Record low53° (1970)

Tue, 0187° / 59°

87 °

Rio Vista, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high87°

Average low59°

Average precipitation0 in

Chance of precipitation0%

Record high108° (2017)

Record low53° (1970)

Wed, 0286° / 60°

86 °

Rio Vista, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high86°

Average low60°

Average precipitation0 in

Chance of precipitation0%

Record high107° (2017)

Record low53° (1960)

Thu, 0386° / 59°

86 °

Rio Vista, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high86°

Average low59°

Average precipitation0 in

Chance of precipitation0%

Record high102° (2017)

Record low52° (1970)

Fri, 0486° / 59°

86 °

Rio Vista, Friday, 4 September

Climate normal for this date — 60-year average.

Average high86°

Average low59°

Average precipitation0 in

Chance of precipitation0%

Record high102° (2022)

Record low52° (1960)

Sat, 0586° / 59°

86 °

Rio Vista, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high86°

Average low59°

Average precipitation0 in

Chance of precipitation2%

Record high110° (2022)

Record low52° (2000)

Sun, 0686° / 59°

86 °

Rio Vista, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high86°

Average low59°

Average precipitation0 in

Chance of precipitation2%

Record high113° (2022)

Record low53° (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 Rio Vista, 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 Rio Vista, 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.