As of 03:44 PDT

Tustin, CA weather in September

71°

Tustin, Sunday, 9 August, 03:44

Clear. Feels like 71°. High 97°, low 71°.

Pressure29.85 inHg

Wind1 mph SE

Humidity85%

Visibility6.2 mi

Dew point65°

See detailed hourly forecast

In September, Tustin, CA averages a high of 81.2° and a low of 64.3°. About 0.3 inches of precipitation fall over the month (1 wet days). The record high is 110.7° (2022) and the record low 52.5° (2024). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	83.3°	65.8°	3%	97.9° (1998)	57.9° (1973)
2	83.7°	66.4°	5%	96.4° (1982)	59.2° (2020)
3	83.7°	66.4°	7%	100.4° (1988)	59.2° (2021)
4	84.6°	66.4°	2%	110.7° (2022)	58.3° (2021)
5	84.4°	66.4°	5%	104.5° (2024)	57° (1973)
6	84.4°	66.4°	3%	108.5° (2024)	58.8° (1970)
7	83.7°	66.2°	0%	100.4° (2024)	58.3° (1980)
8	83.1°	65.8°	0%	106.2° (2024)	57.6° (1980)
9	82.2°	65.8°	8%	99.3° (2024)	59.4° (1961)
10	81°	65.1°	5%	95° (1983)	57.9° (1975)
11	80.6°	64.2°	5%	96.4° (1983)	57.6° (1975)
12	80.1°	64°	2%	98.8° (1971)	56.8° (1972)
13	79.3°	63.9°	2%	99.7° (1971)	55.4° (2021)
14	80.1°	63.5°	2%	95.9° (2014)	57.6° (1970)
15	80.1°	63.5°	5%	96.8° (1979)	57.4° (1986)
16	79.9°	63.9°	8%	97° (2014)	57.2° (1986)
17	79.7°	63.9°	2%	93° (2020)	54.7° (2021)
18	79.3°	63.3°	3%	94.6° (1984)	55.2° (2021)
19	78.8°	63.1°	2%	95.2° (1984)	52.9° (2021)
20	78.4°	63°	8%	92.3° (2015)	56.8° (1989)
21	79.5°	62.8°	5%	91.9° (2021)	55.4° (1965)
22	81.1°	63°	3%	92.1° (1975)	56.7° (1964)
23	81.3°	63°	2%	99° (1975)	56.5° (2010)
24	81.3°	63.5°	7%	100° (1978)	55.9° (2017)
25	81°	63.1°	5%	97.9° (1963)	56.3° (2024)
26	80.1°	63.5°	3%	104° (1963)	53.2° (2024)
27	80.1°	63.1°	2%	99.3° (2010)	55.4° (2013)
28	80.2°	63°	3%	99.5° (1963)	55.4° (2024)
29	80.1°	63.3°	7%	96.6° (1999)	52.5° (2024)
30	80.8°	63°	3%	106.5° (2020)	54.7° (2019)