Santa Rosa, CA weather in July
Santa Rosa is warm and dry in July: highs average 83°F and nights drop to about 51°F. Rain is rare. A good month for most outdoor plans.
- Normal high
- 83°F
- Normal low
- 51°F
- Wet days
- 0
- 0.01 in total
- Muggy days
- 0
- dew point 65°F+
How July changes from start to finish
| July 1 | July 31 | |
|---|---|---|
| Normal high | 83°F | 83°F |
| Normal low | 50°F | 51°F |
| Chance of a wet day | 2% | 2% |
| Sunrise / sunset | 5:50 am / 8:38 pm | 6:12 am / 8:22 pm |
| Daylight | 14.8 h | 14.2 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 am60°Fdew point 53°F
- 9 am71°Fdew point 54°F
- Noon83°Fdew point 54°F
- 3 pm88°Fdew point 53°F
- 6 pm79°Fdew point 54°F
- 9 pm66°Fdew point 53°F
NOAA hourly normals (local standard time) from Travis AFB (44 mi away); average wind 18 mph; clear or few clouds in 90% of daytime hours, mostly cloudy or overcast in 5%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F11 of 31
- Hot dayshigh 90°F or more6 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 0.01 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, 1991-20202017: average high 88°F
- Coolest July2010: average high 78°F
- Wettest July2007: 0.09 in
- Driest July1991: no measurable precipitation
- Highest reading106°F (July 23, 2006)
- Lowest reading38°F (July 6, 2009)
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 | 81°F | 83°F | 84°F |
| Normal low | 48°F | 51°F | 50°F |
| Wet days | 2 | 0 | 1 |
| Comfortable days | 12 | 11 | 11 |
| Daylight | 14.8 h | 14.5 h | 13.6 h |
Highs change by +2°F from June and +1°F into August.
Nearby alternatives in July
- Warmer: Fairfield, CA39 mi · high 90°F · 0 wet days
- Cooler: San Francisco, CA49 mi · high 66°F · 1 wet day
How Santa Rosa ranks in July
- Normal high287th warmest of 378 cities; 35th of 60 in California
- Wet days27th driest of 378
- Comfortable days48th most of 340
What to pack for Santa Rosa in July
- Layers – afternoons near 83°F but nights near 51°F
- Sunglasses and sunscreen – about 14.5 hours of daylight and highs near 83°F
Heating and cooling
July has 26 heating degree days and 74 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Santa Rosa in July?
The normal high is 83°F and the normal low is 51°F. From 1991 to 2020 the hottest July reading was 106°F (July 23, 2006).
Does it rain a lot in Santa Rosa in July?
About 0 days in July have at least 0.01 in of precipitation, and the normal total is 0.01 in. The wettest July in 1991-2020 was in 2007 (0.09 in); the driest was in 1991, with no measurable precipitation.
Is July a good time to visit Santa Rosa?
July ranks 5th of 12 months on our comfort score for Santa Rosa (68 out of 100). It has about 11 comfortable days and about 6 days at 90°F or hotter. The best months are April and May.
Where the numbers come from
- Temperature and rain: Graton (USC00043578), 8.2 mi W of the city center, 200 ft . NOAA normals and daily records, 1991-2020.
- Snowfall, snow depth and frost dates: Santa Rosa (USC00047965), 1.1 mi N of the city center, 166 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Travis AFB (USW00023202), 44 mi ESE of the city center, 59 ft (106 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Sonoma County Airport (724957-23213), 6.8 mi NW of the city center, 119 ft . Hourly observations, 1991-2020.