As of 13:54 PDT

Weather in Vallejo, CA

81°

Vallejo, Saturday, 8 August, 13:54

Partly cloudy. Feels like 82°. High 82°, low 61°.

Pressure29.91 inHg

Wind6 mph SW

Humidity51%

Visibility6.2 mi

Dew point61°

See detailed hourly forecast

Monthly outlook for Vallejo, CA: average high 78.5°, average low 59.1°. That is 2.1° below 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 (93.3°), the coolest 16 August (57.4°).

78.5°/59.1°

Average high / low

−2.1°

Below 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	77.3°	82.9°	-3.1°
18 August – 27 August	80.6°	81.7°	-0.6°
28 August – 6 September	at normal	83.8°	—

August records over 66 years

104.2°4 August 1998All-time high

49.1°10 August 1960All-time low

Sun, 0993° / 61°

93 °

Vallejo, Sunday, 9 August

Clear. High 93°, low 61°.

Pressure29.83 inHg

Wind5 mph SW

Humidity27%

Visibility6.2 mi

Dew point48°

Mon, 1075° / 59°

75 °

Vallejo, Monday, 10 August

Clear. High 75°, low 59°.

Pressure29.88 inHg

Wind9.9 mph SW

Humidity48%

Visibility6.2 mi

Dew point52°

Tue, 1177° / 58°

77 °

Vallejo, Tuesday, 11 August

Clear. High 77°, low 58°.

Pressure29.94 inHg

Wind8.1 mph SW

Humidity44%

Visibility6.2 mi

Dew point52°

Wed, 1273° / 58°

73 °

Vallejo, Wednesday, 12 August

Mostly clear. High 73°, low 58°.

Pressure29.85 inHg

Wind8.7 mph SW

Humidity50%

Visibility6.2 mi

Dew point54°

Thu, 1372° / 58°

72 °

Vallejo, Thursday, 13 August

Partly cloudy. High 72°, low 58°.

Pressure29.85 inHg

Wind14.1 mph SW

Humidity55%

Visibility—

Dew point53°

Fri, 1472° / 60°

72 °

Vallejo, Friday, 14 August

Overcast. High 72°, low 60°.

Pressure29.91 inHg

Wind10.1 mph SW

Humidity58%

Visibility—

Dew point54°

Sat, 1575° / 58°

75 °

Vallejo, Saturday, 15 August

Clear. High 75°, low 58°.

Pressure30.00 inHg

Wind12.1 mph SW

Humidity45%

Visibility—

Dew point51°

Sun, 1679° / 57°

79 °

Vallejo, Sunday, 16 August

Overcast. High 79°, low 57°.

Pressure30.00 inHg

Wind10.1 mph SW

Humidity35%

Visibility—

Dew point46°

Mon, 1775° / 60°

75 °

Vallejo, Monday, 17 August

Overcast. High 75°, low 60°.

Pressure30.06 inHg

Wind10.9 mph SW

Humidity46%

Visibility—

Dew point51°

Tue, 1883° / 58°

83 °

Vallejo, Tuesday, 18 August

Clear. High 83°, low 58°.

Pressure30.00 inHg

Wind8.9 mph SW

Humidity28%

Visibility—

Dew point44°

Wed, 1983° / 59°

83 °

Vallejo, Wednesday, 19 August

Clear. High 83°, low 59°.

Pressure29.94 inHg

Wind11.4 mph S

Humidity35%

Visibility—

Dew point47°

Thu, 2078° / 59°

78 °

Vallejo, Thursday, 20 August

Clear. High 78°, low 59°.

Pressure29.91 inHg

Wind10.4 mph SW

Humidity43%

Visibility—

Dew point51°

Fri, 2184° / 60°

84 °

Vallejo, Friday, 21 August

Clear. High 84°, low 60°.

Pressure29.85 inHg

Wind7.9 mph SW

Humidity32%

Visibility—

Dew point48°

Sat, 2283° / 61°

83 °

Vallejo, Saturday, 22 August

Overcast. High 83°, low 61°.

Pressure29.83 inHg

Wind9.4 mph SW

Humidity34%

Visibility—

Dew point49°

Sun, 2372° / 59°

72 °

Vallejo, Sunday, 23 August

Overcast. High 72°, low 59°.

Pressure29.88 inHg

Wind12.9 mph S

Humidity53%

Visibility—

Dew point53°

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

Mon, 2482° / 57°

82 °

Vallejo, Monday, 24 August

Climate normal for this date — 60-year average.

Average high82°

Average low57°

Average precipitation0 in

Chance of precipitation2%

Record high103° (2010)

Record low51° (1970)

Tue, 2582° / 57°

82 °

Vallejo, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high82°

Average low57°

Average precipitation0 in

Chance of precipitation0%

Record high100° (1988)

Record low52° (1960)

Wed, 2683° / 56°

83 °

Vallejo, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high83°

Average low56°

Average precipitation0 in

Chance of precipitation0%

Record high100° (1988)

Record low51° (2005)

Thu, 2784° / 57°

84 °

Vallejo, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high84°

Average low57°

Average precipitation0 in

Chance of precipitation0%

Record high99° (2008)

Record low52° (1960)

Fri, 2884° / 57°

84 °

Vallejo, Friday, 28 August

Climate normal for this date — 60-year average.

Average high84°

Average low57°

Average precipitation0 in

Chance of precipitation0%

Record high102° (2008)

Record low51° (1960)

Sat, 2983° / 57°

83 °

Vallejo, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high83°

Average low57°

Average precipitation0 in

Chance of precipitation0%

Record high100° (1977)

Record low51° (1975)

Sun, 3083° / 57°

83 °

Vallejo, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high83°

Average low57°

Average precipitation0 in

Chance of precipitation3%

Record high98° (1996)

Record low52° (1960)

Mon, 3183° / 57°

83 °

Vallejo, Monday, 31 August

Climate normal for this date — 60-year average.

Average high83°

Average low57°

Average precipitation0 in

Chance of precipitation3%

Record high95° (1976)

Record low51° (1970)

Tue, 0185° / 57°

85 °

Vallejo, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high85°

Average low57°

Average precipitation0 in

Chance of precipitation2%

Record high102° (2017)

Record low51° (1970)

Wed, 0284° / 57°

84 °

Vallejo, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high84°

Average low57°

Average precipitation0 in

Chance of precipitation2%

Record high102° (2017)

Record low52° (1960)

Thu, 0383° / 57°

83 °

Vallejo, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high83°

Average low57°

Average precipitation0 in

Chance of precipitation0%

Record high98° (1963)

Record low49° (2000)

Fri, 0484° / 57°

84 °

Vallejo, Friday, 4 September

Climate normal for this date — 60-year average.

Average high84°

Average low57°

Average precipitation0 in

Chance of precipitation0%

Record high98° (2008)

Record low50° (2000)

Sat, 0585° / 57°

85 °

Vallejo, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high85°

Average low57°

Average precipitation0 in

Chance of precipitation0%

Record high106° (2022)

Record low51° (2012)

Sun, 0684° / 57°

84 °

Vallejo, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high84°

Average low57°

Average precipitation0 in

Chance of precipitation2%

Record high107° (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 Vallejo, 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 Vallejo, 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.