Gilroy weather in August: Gilroy, California: normal highs, lows, rain and records for August
Gilroy in August has a normal high of 87°F and a normal low of 54°F, a daily mean of 71°F, holding near 87°F all month. Measurable precipitation falls on 0 days in a normal August, 0.03 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 31°C and low of 12°C, 1 mm of precipitation in August.
- NOAA stationGilroy
- Station IDUSC00043417
- Location37.00°N 121.56°W
- Elevation194 ft (59 m)
- From the center1 miles
- Population60,390
- Jan 61° 38°
- Feb 64° 40°
- Mar 68° 43°
- Apr 72° 45°
- May 77° 49°
- Jun 83° 52°
- Jul 87° 54°
- Aug 87° 54°
- Sep 85° 53°
- Oct 79° 48°
- Nov 68° 42°
- Dec 60° 37°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Gilroy in August?
The normal high is 87°F and the normal low 54°F, for a daily mean of 70.8°F. August is 0.2°F warmer than July and 2.1°F warmer than September. August is the warmest month of the year in Gilroy and the 11th wettest. Across the month the normal high falls 1°F, from 88°F on August 1 to 87°F on August 31. From one year to the next August's mean temperature typically moves about 1.6°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 69°F and 72°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 1%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 88°F | 55°F | 1% | 0% |
| August 8 | 88°F | 55°F | 1% | 0% |
| August 15 | 87°F | 55°F | 1% | 0% |
| August 22 | 87°F | 54°F | 1% | 0% |
| August 31 | 87°F | 54°F | 1% | 0% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 1, coldest night August 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 88°F | 55°F | 1% | 0% | 14 h |
| August 2 | 88°F | 55°F | 1% | 0% | 14 h |
| August 3 | 88°F | 55°F | 1% | 0% | 14 h |
| August 4 | 88°F | 55°F | 1% | 0% | 14 h |
| August 5 | 88°F | 55°F | 1% | 0% | 14 h |
| August 6 | 88°F | 55°F | 1% | 0% | 14 h |
| August 7 | 88°F | 55°F | 1% | 0% | 13 h 50 min |
| August 8 | 88°F | 55°F | 1% | 0% | 13 h 50 min |
| August 9 | 88°F | 55°F | 1% | 0% | 13 h 50 min |
| August 10 | 88°F | 55°F | 1% | 0% | 13 h 50 min |
| August 11 | 87°F | 55°F | 1% | 0% | 13 h 50 min |
| August 12 | 87°F | 55°F | 1% | 0% | 13 h 40 min |
| August 13 | 87°F | 55°F | 1% | 0% | 13 h 40 min |
| August 14 | 87°F | 55°F | 1% | 0% | 13 h 40 min |
| August 15 | 87°F | 55°F | 1% | 0% | 13 h 40 min |
| August 16 | 87°F | 55°F | 1% | 0% | 13 h 40 min |
| August 17 | 87°F | 54°F | 1% | 0% | 13 h 30 min |
| August 18 | 87°F | 54°F | 1% | 0% | 13 h 30 min |
| August 19 | 87°F | 54°F | 1% | 0% | 13 h 30 min |
| August 20 | 87°F | 54°F | 1% | 0% | 13 h 30 min |
| August 21 | 87°F | 54°F | 1% | 0% | 13 h 20 min |
| August 22 | 87°F | 54°F | 1% | 0% | 13 h 20 min |
| August 23 | 87°F | 54°F | 1% | 0% | 13 h 20 min |
| August 24 | 87°F | 54°F | 1% | 0% | 13 h 20 min |
| August 25 | 87°F | 54°F | 1% | 0% | 13 h 20 min |
| August 26 | 87°F | 54°F | 1% | 0% | 13 h 10 min |
| August 27 | 87°F | 54°F | 1% | 0% | 13 h 10 min |
| August 28 | 87°F | 54°F | 1% | 0% | 13 h 10 min |
| August 29 | 87°F | 54°F | 1% | 0% | 13 h 10 min |
| August 30 | 87°F | 54°F | 1% | 0% | 13 h 10 min |
| August 31 | 87°F | 54°F | 1% | 0% | 13 h |
- Normal high
- 87°FAugust average
- Normal low
- 54°FAugust average
- Precipitation
- 0.03 inmonth total
- Days with precipitation
- fewer than 10.01 inch or more
- Days at 90°F or more
- 12
- Daylight
- 14 h to 13 hAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 28
- Sunshine
- 97%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00043417; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Gilroy in August?
On a given August day the chance of 0.01 inch or more is 1% on average, highest around August 1 (1%). In all, 0.03 in falls on 0 days of a normal August.
In a normal August in Gilroy, 12 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00043417.
What are the records for August in Gilroy?
The warmest August temperature on this station's record (since 1957) is 112°F, on August 6, 1997; the coldest is 39°F, on August 21, 1964. The wettest August brought 1.00 in (1976).
The August mean against the 1991-2020 normal of 70.8°F: 2021 72.5°F (+1.7), 2022 74.1°F (+3.3). 2 of 2 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 72.5°F | +1.7°F | 0.00 in |
| 2022 | 74.1°F | +3.3°F | 0.00 in |
Source: records: ACIS, station USC00043417; recent months: ACIS, station USC00043417. Records and recent months use complete months only.
How does August in Gilroy 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; Gilroy's is 87°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.