As of 06:24 PDT

San Bruno, CA weather in September

57°

San Bruno, Sunday, 9 August, 06:24

Partly cloudy. Feels like 56°. High 85°, low 57°.

Pressure29.83 inHg

Wind2 mph SE

Humidity85%

Visibility6.2 mi

Dew point53°

See detailed hourly forecast

In September, San Bruno, CA averages a high of 70.4° and a low of 56°. About 0.2 inches of precipitation fall over the month (1 wet days). The record high is 100.8° (2017) and the record low 48.4° (1970). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	71.2°	56.5°	3%	100.4° (2017)	51.6° (1970)
2	71.4°	56.7°	0%	100.8° (2017)	52.2° (1964)
3	70.9°	56.5°	0%	88° (2017)	51.3° (1973)
4	70.9°	56.3°	0%	84.2° (1961)	52° (1960)
5	71.6°	56.3°	0%	85.5° (2004)	52° (1969)
6	71.8°	56.1°	0%	98.2° (2022)	52.2° (1980)
7	72.1°	56.7°	0%	84° (2004)	52.2° (2011)
8	71.1°	56.5°	2%	89.1° (1984)	51.8° (2002)
9	69.6°	56.3°	7%	84.9° (1976)	52.2° (1965)
10	70.2°	55.9°	3%	84° (2017)	51.4° (1985)
11	70.7°	56.5°	2%	89.6° (1979)	53.1° (1961)
12	70°	56.1°	0%	88° (1979)	51.6° (1988)
13	69.6°	56.1°	0%	90.3° (1971)	51.3° (2005)
14	68.2°	55.8°	2%	94.3° (1971)	50.2° (1970)
15	68.2°	55.4°	0%	88.7° (1971)	48.4° (1970)
16	68.7°	55.8°	7%	86.5° (1968)	50° (2006)
17	69.3°	55.9°	3%	86.7° (1984)	50.5° (2012)
18	69.8°	56.5°	7%	88.3° (2000)	51.1° (2008)
19	70°	55.8°	7%	83.1° (2002)	50.5° (1988)
20	71.1°	55.9°	2%	87.4° (1983)	49.8° (2007)
21	70.9°	55.6°	5%	85.1° (2003)	50.2° (1968)
22	69.8°	55.6°	2%	84° (1964)	49.8° (2012)
23	70.7°	55°	5%	88.3° (2024)	50.2° (1981)
24	71.4°	55.6°	3%	88.2° (1978)	49.8° (2018)
25	71.2°	56.1°	7%	91.6° (2019)	51.8° (2018)
26	70.7°	55.8°	2%	87.4° (1970)	50° (1988)
27	70.7°	56.1°	5%	86.4° (1973)	49.6° (1986)
28	70.3°	55.9°	3%	92.7° (2020)	51.3° (1986)
29	70.2°	55.6°	3%	85.3° (1999)	51.4° (2006)
30	70°	55.6°	7%	86.5° (1980)	49.3° (2007)