Sunnyvale, CA weather in July
July in Sunnyvale: mild and dry. Highs 77°F, lows 59°F, rain is rare. This is the peak of the warm season in Sunnyvale. A great month for outdoor plans.
- Normal high
- 77°F
- Normal low
- 59°F
- Wet days
- 0
- 0.0 in total
- Muggy days
- 0
- dew point 65°F+
How July changes from start to finish
| July 1 | July 31 | |
|---|---|---|
| Normal high | 77°F | 76°F |
| Normal low | 57°F | 59°F |
| Chance of a wet day | 1% | 1% |
| Sunrise / sunset | 5:51 am / 8:32 pm | 6:11 am / 8:17 pm |
| Daylight | 14.7 h | 14.1 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
A typical July day
- 6 am57°Fdew point 53°F
- 9 am63°Fdew point 54°F
- Noon69°Fdew point 54°F
- 3 pm69°Fdew point 54°F
- 6 pm64°Fdew point 53°F
- 9 pm59°Fdew point 53°F
NOAA hourly normals (local standard time) from San Francisco Intl Airport (25 mi away); average wind 13 mph; clear or few clouds in 65% of daytime hours, mostly cloudy or overcast in 17%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F24 of 31
- Hot dayshigh 90°F or more1 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow0 of 31
- Notable rainat least 0.10 in0 of 31
- Freezing nightslow 32°F or below0 of 31
Average days per July, counted from daily records for each year 1991-2020.
Rain in July
Normal precipitation is 0.0 in; a dry July brings about 0.0 in and a wet one about 0.0 in (25th and 75th percentiles). Days with half an inch or more are rare.
How July varies from year to year
- Warmest July, 1991-20202006: average high 81°F
- Coolest July2000: average high 74°F
- Wettest July2007: 0.06 in
- Driest July1991: no measurable precipitation
- Highest reading103°F (July 31, 1993)
- Lowest reading52°F (July 20, 2016)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
July compared with June and August
| June | July | August | |
|---|---|---|---|
| Normal high | 76°F | 77°F | 77°F |
| Normal low | 56°F | 59°F | 59°F |
| Wet days | 1 | 0 | 0 |
| Comfortable days | 23 | 24 | 23 |
| Daylight | 14.7 h | 14.4 h | 13.6 h |
Highs change by +1°F from June and 0°F into August.
Nearby alternatives in July
- Warmer: Concord, CA42 mi · high 88°F · 0 wet days
- Cooler: San Francisco, CA35 mi · high 66°F · 1 wet day
How Sunnyvale ranks in July
- Normal high344th warmest of 378 cities; 49th of 60 in California
- Wet days14th driest of 378
- Comfortable days8th most of 340
What to pack for Sunnyvale in July
- Sunglasses and sunscreen – about 14.4 hours of daylight and highs near 77°F
Heating and cooling
July has 11 heating degree days and 95 cooling degree days (base 65°F), 4% of the year's total heating and cooling demand.
Questions
How hot is Sunnyvale in July?
The normal high is 77°F and the normal low is 59°F. From 1991 to 2020 the hottest July reading was 103°F (July 31, 1993).
Does it rain a lot in Sunnyvale in July?
About 0 days in July have at least 0.01 in of precipitation, and the normal total is 0.00 in. The wettest July in 1991-2020 was in 2007 (0.06 in); the driest was in 1991, with no measurable precipitation.
Is July a good time to visit Sunnyvale?
July ranks 2nd of 12 months on our comfort score for Sunnyvale (89 out of 100). It has about 24 comfortable days and about 1 day at 90°F or hotter. The best months are May, June and July.
Where the numbers come from
- Temperature, rain and frost dates: Moffett Federal Airfield (USW00023244), 2.6 mi NNW of the city center, 39 ft (85 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Snowfall: Palo Alto (USC00046646), 7.7 mi NW of the city center, 25 ft (99 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Snow depth: Newark (USC00046144), 10 mi N of the city center, 10 ft (114 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: San Francisco Intl Airport (USW00023234), 25 mi NW of the city center, 8 ft (116 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: N Y. Mineta Sn Jo Intl Apt (724945-23293), 6.2 mi E of the city center, 49 ft (75 ft lower than the city). Hourly observations, 1991-2020.