As of 03:39 PDT

Weather in Hillsborough, CA

58°

Hillsborough, Sunday, 9 August, 03:39

Partly cloudy. Feels like 58°. High 86°, low 58°.

Pressure29.85 inHg

Wind1 mph S

Humidity91%

Visibility6.2 mi

Dew point56°

See detailed hourly forecast

Monthly outlook for Hillsborough, CA: average high 70.6°, average low 56.8°. That is 0.3° 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 (86.4°), the coolest 24 August (55°).

70.6°/56.8°

Average high / low

−0.3°

Below normal

0 / 0

Wet days / normal

0.0 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
9 August – 18 August	72.2°	71.3°	+0.5°
19 August – 28 August	68°	71.6°	-2°
29 August – 7 September	at normal	73°	—

August records over 66 years

100.2°14 August 2020All-time high

51.6°19 August 1973All-time low

Climate normals and records are computed from the nearest reference point — Burlingame (2 mi).

Mon, 1084° / 56°

84 °

Hillsborough, Monday, 10 August

Overcast. High 84°, low 56°.

Pressure29.88 inHg

Wind6.7 mph W

Humidity62%

Visibility6.2 mi

Dew point54°

Tue, 1171° / 56°

71 °

Hillsborough, Tuesday, 11 August

Mostly clear. High 71°, low 56°.

Pressure29.94 inHg

Wind5.5 mph W

Humidity62%

Visibility6.2 mi

Dew point54°

Wed, 1269° / 56°

69 °

Hillsborough, Wednesday, 12 August

Mostly clear. High 69°, low 56°.

Pressure29.85 inHg

Wind6.1 mph W

Humidity66%

Visibility6.2 mi

Dew point55°

Thu, 1369° / 57°

69 °

Hillsborough, Thursday, 13 August

Mostly clear. High 69°, low 57°.

Pressure29.85 inHg

Wind10.5 mph SW

Humidity63%

Visibility—

Dew point55°

Fri, 1468° / 56°

68 °

Hillsborough, Friday, 14 August

Clear. High 68°, low 56°.

Pressure29.97 inHg

Wind8.7 mph W

Humidity66%

Visibility—

Dew point55°

Sat, 1569° / 56°

69 °

Hillsborough, Saturday, 15 August

Partly cloudy. High 69°, low 56°.

Pressure30.03 inHg

Wind8.4 mph W

Humidity65%

Visibility—

Dew point55°

Sun, 1669° / 58°

69 °

Hillsborough, Sunday, 16 August

Overcast. High 69°, low 58°.

Pressure30.09 inHg

Wind11.1 mph W

Humidity66%

Visibility—

Dew point56°

Mon, 1768° / 56°

68 °

Hillsborough, Monday, 17 August

Overcast. High 68°, low 56°.

Pressure30.09 inHg

Wind10.1 mph W

Humidity64%

Visibility—

Dew point54°

Tue, 1870° / 57°

70 °

Hillsborough, Tuesday, 18 August

Clear. High 70°, low 57°.

Pressure30.03 inHg

Wind10.8 mph W

Humidity69%

Visibility—

Dew point58°

Wed, 1969° / 60°

69 °

Hillsborough, Wednesday, 19 August

Partly cloudy. High 69°, low 60°.

Pressure29.97 inHg

Wind10.8 mph W

Humidity74%

Visibility—

Dew point59°

Thu, 2069° / 57°

69 °

Hillsborough, Thursday, 20 August

Overcast. High 69°, low 57°.

Pressure30.00 inHg

Wind11.4 mph W

Humidity70%

Visibility—

Dew point58°

Fri, 2166° / 56°

66 °

Hillsborough, Friday, 21 August

Overcast. High 66°, low 56°.

Pressure29.97 inHg

Wind12.1 mph W

Humidity65%

Visibility—

Dew point53°

Sat, 2267° / 57°

67 °

Hillsborough, Saturday, 22 August

Partly cloudy. High 67°, low 57°.

Pressure29.97 inHg

Wind9.7 mph W

Humidity64%

Visibility—

Dew point54°

Sun, 2367° / 55°

67 °

Hillsborough, Sunday, 23 August

Partly cloudy. High 67°, low 55°.

Pressure29.94 inHg

Wind9.7 mph W

Humidity64%

Visibility—

Dew point53°

Mon, 2469° / 55°

69 °

Hillsborough, Monday, 24 August

Mostly clear. High 69°, low 55°.

Pressure29.88 inHg

Wind8.5 mph W

Humidity61%

Visibility—

Dew point53°

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

Tue, 2572° / 57°

72 °

Hillsborough, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high72°

Average low57°

Average precipitation0 in

Chance of precipitation0%

Record high81° (2010)

Record low53° (2000)

Wed, 2672° / 57°

72 °

Hillsborough, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high72°

Average low57°

Average precipitation0 in

Chance of precipitation0%

Record high85° (2017)

Record low52° (2005)

Thu, 2773° / 57°

73 °

Hillsborough, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high73°

Average low57°

Average precipitation0 in

Chance of precipitation0%

Record high89° (2017)

Record low54° (1966)

Fri, 2873° / 57°

73 °

Hillsborough, Friday, 28 August

Climate normal for this date — 60-year average.

Average high73°

Average low57°

Average precipitation0 in

Chance of precipitation0%

Record high94° (2021)

Record low53° (1960)

Sat, 2972° / 58°

72 °

Hillsborough, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high72°

Average low58°

Average precipitation0 in

Chance of precipitation0%

Record high93° (1968)

Record low54° (2012)

Sun, 3072° / 58°

72 °

Hillsborough, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high72°

Average low58°

Average precipitation0 in

Chance of precipitation2%

Record high86° (2023)

Record low54° (2012)

Mon, 3172° / 58°

72 °

Hillsborough, Monday, 31 August

Climate normal for this date — 60-year average.

Average high72°

Average low58°

Average precipitation0 in

Chance of precipitation0%

Record high87° (2017)

Record low53° (1960)

Tue, 0173° / 57°

73 °

Hillsborough, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high73°

Average low57°

Average precipitation0 in

Chance of precipitation3%

Record high106° (2017)

Record low53° (2022)

Wed, 0273° / 58°

73 °

Hillsborough, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high73°

Average low58°

Average precipitation0 in

Chance of precipitation0%

Record high106° (2017)

Record low53° (1964)

Thu, 0373° / 58°

73 °

Hillsborough, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high73°

Average low58°

Average precipitation0 in

Chance of precipitation0%

Record high94° (2017)

Record low53° (1973)

Fri, 0473° / 57°

73 °

Hillsborough, Friday, 4 September

Climate normal for this date — 60-year average.

Average high73°

Average low57°

Average precipitation0 in

Chance of precipitation0%

Record high87° (2022)

Record low53° (1960)

Sat, 0574° / 58°

74 °

Hillsborough, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high74°

Average low58°

Average precipitation0 in

Chance of precipitation0%

Record high95° (2022)

Record low53° (1969)

Sun, 0674° / 57°

74 °

Hillsborough, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high74°

Average low57°

Average precipitation0 in

Chance of precipitation0%

Record high106° (2022)

Record low53° (1980)

Mon, 0774° / 58°

74 °

Hillsborough, Monday, 7 September

Climate normal for this date — 60-year average.

Average high74°

Average low58°

Average precipitation0 in

Chance of precipitation0%

Record high98° (2020)

Record low53° (2018)

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 Hillsborough, 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 Hillsborough, 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.