Vallejo weather in August: Vallejo, California: normal highs, lows, rain and records for August
Vallejo in August has a normal high of 86°F and a normal low of 56°F, a daily mean of 71°F, holding near 86°F all month. The month brings 0.04 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 30°C and low of 13°C, 1 mm of precipitation in August.
- NOAA stationVallejo
- Station IDUSC00049219
- Location38.10°N 122.19°W
- Elevation341 ft (104 m)
- From the center4 miles
- Population123,475
- Jan 57° 42°
- Feb 63° 45°
- Mar 68° 46°
- Apr 73° 47°
- May 78° 51°
- Jun 83° 54°
- Jul 85° 56°
- Aug 86° 56°
- Sep 86° 57°
- Oct 79° 54°
- Nov 66° 47°
- Dec 58° 42°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Vallejo in August?
The normal high is 86°F and the normal low 56°F, for a daily mean of 71.1°F. August is 0.5°F warmer than July and 0.2°F cooler than September. August is the 2nd warmest month of the year in Vallejo and the 11th wettest. Across the month the normal high rises 2°F, from 85°F on August 1 to 87°F on August 31.
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 85°F | 56°F | – | – |
| August 8 | 86°F | 56°F | – | – |
| August 15 | 86°F | 56°F | – | – |
| August 22 | 86°F | 56°F | – | – |
| August 31 | 87°F | 56°F | – | – |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 31, coldest night August 17)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 85°F | 56°F | – | – | 14 h 10 min |
| August 2 | 85°F | 56°F | – | – | 14 h 10 min |
| August 3 | 85°F | 56°F | – | – | 14 h 10 min |
| August 4 | 85°F | 56°F | – | – | 14 h |
| August 5 | 86°F | 56°F | – | – | 14 h |
| August 6 | 86°F | 56°F | – | – | 14 h |
| August 7 | 86°F | 56°F | – | – | 14 h |
| August 8 | 86°F | 56°F | – | – | 14 h |
| August 9 | 86°F | 56°F | – | – | 13 h 50 min |
| August 10 | 86°F | 56°F | – | – | 13 h 50 min |
| August 11 | 86°F | 56°F | – | – | 13 h 50 min |
| August 12 | 86°F | 56°F | – | – | 13 h 50 min |
| August 13 | 86°F | 56°F | – | – | 13 h 50 min |
| August 14 | 86°F | 56°F | – | – | 13 h 40 min |
| August 15 | 86°F | 56°F | – | – | 13 h 40 min |
| August 16 | 86°F | 56°F | – | – | 13 h 40 min |
| August 17 | 86°F | 56°F | – | – | 13 h 40 min |
| August 18 | 86°F | 56°F | – | – | 13 h 30 min |
| August 19 | 86°F | 56°F | – | – | 13 h 30 min |
| August 20 | 86°F | 56°F | – | – | 13 h 30 min |
| August 21 | 86°F | 56°F | – | – | 13 h 30 min |
| August 22 | 86°F | 56°F | – | – | 13 h 30 min |
| August 23 | 86°F | 56°F | – | – | 13 h 20 min |
| August 24 | 86°F | 56°F | – | – | 13 h 20 min |
| August 25 | 87°F | 56°F | – | – | 13 h 20 min |
| August 26 | 87°F | 56°F | – | – | 13 h 20 min |
| August 27 | 87°F | 56°F | – | – | 13 h 10 min |
| August 28 | 87°F | 56°F | – | – | 13 h 10 min |
| August 29 | 87°F | 56°F | – | – | 13 h 10 min |
| August 30 | 87°F | 56°F | – | – | 13 h 10 min |
| August 31 | 87°F | 56°F | – | – | 13 h 10 min |
- Normal high
- 86°FAugust average
- Normal low
- 56°FAugust average
- Precipitation
- 0.04 inmonth total
- Days at 90°F or more
- 8
- Daylight
- 14 h 10 min to 13 h 10 minAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 23
- Sunshine
- 94%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00049219; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Vallejo in August?
In a normal August in Vallejo, 8 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00049219.
What are the records for August in Vallejo?
The August mean against the 1991-2020 normal of 71.1°F: 2021 71.4°F (+0.3), 2022 72.5°F (+1.4), 2024 71.4°F (+0.3), 2025 72.0°F (+0.9), 2026 70.7°F (−0.4). 4 of 5 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 71.4°F | +0.3°F | 0.00 in |
| 2022 | 72.5°F | +1.4°F | 0.00 in |
| 2024 | 71.4°F | +0.3°F | 0.00 in |
| 2025 | 72.0°F | +0.9°F | 0.00 in |
| 2026 | 70.7°F | −0.4°F | 0.00 in |
Source: recent months: ACIS, station USC00049219. Records and recent months use complete months only.
How does August in Vallejo compare across California?
Across the 219 places PlainClimate covers in California, August normal highs run from 63°F in Bodega to 109°F in Needles; Vallejo's is 86°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.