As of 13:26 PDT

Mission Viejo, CA weather in August

87°

Mission Viejo, Sunday, 9 August, 13:26

Mostly clear. Feels like 91°. High 90°, low 71°.

Pressure29.85 inHg

Wind4 mph N

Humidity54%

Visibility6.2 mi

Dew point69°

See detailed hourly forecast

In August, Mission Viejo, CA averages a high of 80.3° and a low of 64.6°. About 0.1 inches of precipitation fall over the month (0 wet days). The record high is 105.6° (2020) and the record low 55.8° (2013). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	80.2°	64.4°	0%	91.9° (2017)	55.8° (2013)
2	80.4°	64.4°	2%	90.3° (2021)	57.9° (2025)
3	80.1°	64.6°	2%	92.1° (2024)	58.8° (1962)
4	80.2°	64.2°	0%	89.2° (2024)	56.8° (1962)
5	80.6°	64.4°	0%	92.5° (1997)	58.8° (1991)
6	80.6°	64.8°	0%	92.3° (2018)	58.6° (1991)
7	80.4°	64.8°	0%	94.6° (2018)	57.6° (1999)
8	80.4°	64.4°	0%	92.5° (2018)	58.1° (2010)
9	80.4°	64.6°	2%	97.9° (2018)	56.1° (2010)
10	79.9°	64.8°	2%	90.1° (2022)	59° (2013)
11	80.2°	64.9°	0%	91.2° (2022)	57° (2010)
12	80.1°	64.6°	2%	91° (1991)	56.5° (2010)
13	80.4°	64.4°	0%	97.7° (2020)	57° (1974)
14	79.5°	64.4°	0%	93.9° (2020)	57.6° (2010)
15	79.7°	64.6°	2%	91° (2020)	57.7° (1972)
16	79.7°	64.8°	3%	91.4° (2023)	59.4° (1987)
17	79.7°	64.6°	3%	92.1° (2020)	58.5° (1975)
18	79.2°	64.4°	3%	105.6° (2020)	57.6° (1975)
19	78.8°	64.4°	3%	91.4° (2020)	58.1° (1975)
20	79.3°	64.2°	2%	94.8° (2024)	59.2° (1980)
21	79.5°	64.2°	3%	92.3° (2020)	58.1° (1975)
22	79.7°	64°	0%	92.8° (2020)	56.8° (1968)
23	80.2°	63.9°	0%	90.5° (2025)	58.1° (1968)
24	80.2°	64.6°	0%	89.6° (1985)	57.9° (1960)
25	80.6°	64.8°	0%	93° (1985)	57.7° (1978)
26	81.3°	65.1°	3%	93° (2021)	57.4° (1990)
27	81.9°	65.3°	0%	95.2° (2020)	57.7° (1973)
28	82°	65.3°	0%	92.1° (2023)	59.5° (1973)
29	82.6°	65.7°	2%	93.2° (2023)	57.7° (2010)
30	81.5°	65.8°	0%	92.5° (1967)	57.6° (1964)
31	81.1°	64.9°	0%	103.6° (2017)	58.3° (1961)