Hayward, CA weather in August
Hayward is mild and dry in August: highs average 73°F and nights drop to about 56°F. Rain is rare. This is the peak of the warm season in Hayward. A great month for outdoor plans.
- Normal high
- 73°F
- Normal low
- 56°F
- Wet days
- 0
- 0.05 in total
- Muggy days
- 0
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 73°F | 74°F |
| Normal low | 56°F | 56°F |
| Chance of a wet day | 1% | 2% |
| Sunrise / sunset | 6:12 am / 8:17 pm | 6:37 am / 7:39 pm |
| Daylight | 14.1 h | 13.0 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 August day
- 6 am59°Fdew point 55°F
- 9 am63°Fdew point 56°F
- Noon69°Fdew point 56°F
- 3 pm70°Fdew point 56°F
- 6 pm65°Fdew point 56°F
- 9 pm61°Fdew point 56°F
NOAA hourly normals (local standard time) from Oakland Metro Intl Airport (9 mi away); average wind 9 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°F27 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 August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 0.05 in; a dry August brings about 0.0 in and a wet one about 0.01 in (25th and 75th percentiles). Days with half an inch or more are rare.
How August varies from year to year
- Warmest August, 1991-20202019: average high 77°F
- Coolest August2012: average high 69°F
- Wettest August1997: 1.2 in
- Driest August1993: no measurable precipitation
- Highest reading99°F (August 14, 2020)
- Lowest reading50°F (August 6, 2018)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 73°F | 73°F | 75°F |
| Normal low | 55°F | 56°F | 56°F |
| Wet days | 0 | 0 | 1 |
| Comfortable days | 28 | 27 | 23 |
| Daylight | 14.5 h | 13.6 h | 12.4 h |
Highs change by 0°F from July and +2°F into September.
Nearby alternatives in August
- Warmer: Concord, CA22 mi · high 87°F · 0 wet days
- Cooler: San Francisco, CA20 mi · high 68°F · 1 wet day
How Hayward ranks in August
- Normal high359th warmest of 378 cities; 55th of 60 in California
- Wet days40th driest of 378
- Comfortable days3rd most of 341
Heating and cooling
August has 44 heating degree days and 41 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Hayward in August?
The normal high is 73°F and the normal low is 56°F. From 1991 to 2020 the hottest August reading was 99°F (most recently on August 14, 2020).
Does it rain a lot in Hayward in August?
About 0 days in August have at least 0.01 in of precipitation, and the normal total is 0.05 in. The wettest August in 1991-2020 was in 1997 (1.2 in); the driest was in 1993, with no measurable precipitation.
Is August a good time to visit Hayward?
August ranks 2nd of 12 months on our comfort score for Hayward (91 out of 100). It has about 27 comfortable days and about 1 day at 90°F or hotter. The best months are July and August.
Where the numbers come from
- Temperature and cloud cover: San Francisco Intl Airport (USW00023234), 16 mi WSW of the city center, 8 ft (98 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Rain: Upper San Leandro Filters (USC00049185), 8.6 mi NNW of the city center, 394 ft (288 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Newark (USC00046144), 11 mi SSE of the city center, 10 ft (96 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Frost dates: Hayward Air Terminal (USW00093228), 2.1 mi WSW of the city center, 43 ft (63 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Oakland Metro Intl Airport (USW00023230), 8.5 mi WNW of the city center, 6 ft (100 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: San Francisco International Airport (724940-23234), 16 mi WSW of the city center, 10 ft (96 ft lower than the city). Hourly observations, 1991-2020.