San Luis Obispo weather in July: San Luis Obispo, California: normal highs, lows, rain and records for July
San Luis Obispo in July has a normal high of 78°F and a normal low of 54°F, a daily mean of 66°F, rising from 77°F on the 1st to 79°F by the 31st. Measurable precipitation falls on 0 days in a normal July, 0.08 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 26°C and low of 12°C, 2 mm of precipitation in July.
- NOAA stationSan Luis Obispo Airport
- Station IDUSW00093206
- Location35.24°N 120.64°W
- Elevation200 ft (61 m)
- Population49,729
- Jan 65° 41°
- Feb 65° 42°
- Mar 67° 45°
- Apr 69° 46°
- May 72° 48°
- Jun 75° 51°
- Jul 78° 54°
- Aug 79° 55°
- Sep 80° 53°
- Oct 77° 50°
- Nov 71° 45°
- Dec 65° 40°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is San Luis Obispo in July?
The normal high is 78°F and the normal low 54°F, for a daily mean of 66.1°F. July is 2.9°F warmer than June and 1.0°F cooler than August. July is the 3rd warmest month of the year in San Luis Obispo and the 10th wettest. Across the month the normal high rises 2°F, from 77°F on July 1 to 79°F on July 31. From one year to the next July's mean temperature typically moves about 1.5°F either way (NOAA's standard deviation), so roughly two Julys in three average between 65°F and 68°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 |
|---|---|---|---|---|
| July 1 | 77°F | 53°F | 1% | 0% |
| July 8 | 78°F | 54°F | 1% | 0% |
| July 15 | 78°F | 54°F | 1% | 0% |
| July 22 | 78°F | 55°F | 1% | 0% |
| July 31 | 79°F | 55°F | 1% | 0% |
Every day of July: normal high, low and chance of precipitation (warmest afternoon July 30, coldest night July 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| July 1 | 77°F | 53°F | 1% | 0% | 14 h 30 min |
| July 2 | 77°F | 53°F | 1% | 0% | 14 h 30 min |
| July 3 | 77°F | 53°F | 1% | 0% | 14 h 30 min |
| July 4 | 77°F | 53°F | 1% | 0% | 14 h 30 min |
| July 5 | 77°F | 54°F | 1% | 0% | 14 h 30 min |
| July 6 | 77°F | 54°F | 1% | 0% | 14 h 30 min |
| July 7 | 78°F | 54°F | 1% | 0% | 14 h 30 min |
| July 8 | 78°F | 54°F | 1% | 0% | 14 h 30 min |
| July 9 | 78°F | 54°F | 1% | 0% | 14 h 30 min |
| July 10 | 78°F | 54°F | 1% | 0% | 14 h 20 min |
| July 11 | 78°F | 54°F | 1% | 0% | 14 h 20 min |
| July 12 | 78°F | 54°F | 1% | 0% | 14 h 20 min |
| July 13 | 78°F | 54°F | 1% | 0% | 14 h 20 min |
| July 14 | 78°F | 54°F | 1% | 0% | 14 h 20 min |
| July 15 | 78°F | 54°F | 1% | 0% | 14 h 20 min |
| July 16 | 78°F | 55°F | 1% | 0% | 14 h 20 min |
| July 17 | 78°F | 55°F | 1% | 0% | 14 h 20 min |
| July 18 | 78°F | 55°F | 1% | 0% | 14 h 20 min |
| July 19 | 78°F | 55°F | 1% | 0% | 14 h 10 min |
| July 20 | 78°F | 55°F | 1% | 0% | 14 h 10 min |
| July 21 | 78°F | 55°F | 1% | 0% | 14 h 10 min |
| July 22 | 78°F | 55°F | 1% | 0% | 14 h 10 min |
| July 23 | 78°F | 55°F | 1% | 0% | 14 h 10 min |
| July 24 | 78°F | 55°F | 1% | 0% | 14 h 10 min |
| July 25 | 79°F | 55°F | 1% | 0% | 14 h 10 min |
| July 26 | 79°F | 55°F | 1% | 0% | 14 h 10 min |
| July 27 | 79°F | 55°F | 1% | 0% | 14 h |
| July 28 | 79°F | 55°F | 1% | 0% | 14 h |
| July 29 | 79°F | 55°F | 1% | 0% | 14 h |
| July 30 | 79°F | 55°F | 1% | 0% | 14 h |
| July 31 | 79°F | 55°F | 1% | 0% | 14 h |
- Normal high
- 78°FJuly average
- Normal low
- 54°FJuly average
- Precipitation
- 0.08 inmonth total
- Days with precipitation
- fewer than 10.01 inch or more
- Days at 90°F or more
- 1
- Daylight
- 14 h 30 min to 14 hJuly 1 to July 31
- Days at 70°F or more
- 30
- Days at 80°F or more
- 11
- Sunshine
- 94%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00093206; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in San Luis Obispo in July?
On a given July day the chance of 0.01 inch or more is 1% on average, highest around July 1 (1%). In all, 0.08 in falls on 0 days of a normal July.
In a normal July in San Luis Obispo, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00093206.
What are the records for July in San Luis Obispo?
The warmest July temperature on this station's record (since 1998) is 102°F, on July 6, 2018; the coldest is 44°F, on July 4, 1999. The wettest July brought 1.32 in (2015).
The July mean against the 1991-2020 normal of 66.1°F: 2021 68.2°F (+2.1), 2022 66.2°F (+0.1), 2023 67.7°F (+1.6), 2024 70.5°F (+4.4), 2025 64.3°F (−1.8), 2026 67.3°F (+1.3). 5 of 6 ran warmer than normal.
| July | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 68.2°F | +2.1°F | 0.01 in |
| 2022 | 66.2°F | +0.1°F | 0.00 in |
| 2023 | 67.7°F | +1.6°F | 0.00 in |
| 2024 | 70.5°F | +4.4°F | 0.00 in |
| 2025 | 64.3°F | −1.8°F | 0.00 in |
| 2026 | 67.3°F | +1.3°F | 0.00 in |
Source: records: ACIS, station USW00093206; recent months: ACIS, station USW00093206. Records and recent months use complete months only.
How does July in San Luis Obispo compare across California?
Across the 219 places PlainClimate covers in California, July normal highs run from 62°F in Bodega to 111°F in Needles; San Luis Obispo's is 78°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- San Luis Obispo in June75°F by day, 51°F at night
- San Luis Obispo in August79°F by day, 55°F at night
- San Luis Obispo through the yearEvery month, frost dates, records and recent years
- California in JulyThe statewide normal and the warmest and coolest places
- Needles: California's warmest Julynormal high 111°F