Hayward, CA weather in May
In May, Hayward sees highs around 68°F and lows around 52°F: mild and mostly dry. Expect about 4 wet days. Great for outdoor plans.
- Normal high
- 68°F
- Normal low
- 52°F
- Wet days
- 4
- 0.9 in total
- Muggy days
- 0
- dew point 65°F+
How May changes from start to finish
| May 1 | May 31 | |
|---|---|---|
| Normal high | 67°F | 70°F |
| Normal low | 50°F | 53°F |
| Chance of a wet day | 15% | 9% |
| Sunrise / sunset | 6:12 am / 7:58 pm | 5:48 am / 8:23 pm |
| Daylight | 13.8 h | 14.6 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 May day
- 6 am55°Fdew point 49°F
- 9 am60°Fdew point 50°F
- Noon65°Fdew point 50°F
- 3 pm66°Fdew point 50°F
- 6 pm61°Fdew point 50°F
- 9 pm57°Fdew point 50°F
NOAA hourly normals (local standard time) from Oakland Metro Intl Airport (9 mi away); average wind 11 mph; clear or few clouds in 44% of daytime hours, mostly cloudy or overcast in 34%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F18 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow4 of 31
- Notable rainat least 0.10 in2 of 31
- Freezing nightslow 32°F or below0 of 31
Average days per May, counted from daily records for each year 1991-2020.
Rain in May
Normal precipitation is 0.9 in; a dry May brings about 0.04 in and a wet one about 1.3 in (25th and 75th percentiles). About 1 day brings half an inch or more.
How May varies from year to year
- Warmest May, 1991-20201997: average high 73°F
- Coolest May1999: average high 63°F
- Wettest May1998: 3.6 in
- Driest May1992: no measurable precipitation
- Highest reading96°F (May 15, 2008)
- Lowest reading44°F (May 1, 2008)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
May compared with April and June
| April | May | June | |
|---|---|---|---|
| Normal high | 66°F | 68°F | 72°F |
| Normal low | 49°F | 52°F | 54°F |
| Wet days | 7 | 4 | 1 |
| Comfortable days | 12 | 18 | 23 |
| Daylight | 13.2 h | 14.2 h | 14.7 h |
Highs change by +2°F from April and +4°F into June.
Nearby alternatives in May
- Warmer: Concord, CA22 mi · high 78°F · 3 wet days
- Cooler: South Lake Tahoe, CA143 mi · high 62°F · 5 wet days
How Hayward ranks in May
- Normal high295th warmest of 378 cities; 51st of 60 in California
- Wet days66th driest of 378
- Comfortable days33rd most of 339
Heating and cooling
May has 170 heating degree days and 14 cooling degree days (base 65°F), 7% of the year's total heating and cooling demand.
Questions
How cold is Hayward in May?
The normal high is 68°F and the normal low is 52°F. From 1991 to 2020 the coldest May reading was 44°F (May 1, 2008).
Does it rain a lot in Hayward in May?
About 4 days in May have at least 0.01 in of precipitation, and the normal total is 0.9 in. The wettest May in 1991-2020 was in 1998 (3.6 in); the driest was in 1992, with no measurable precipitation.
Is May a good time to visit Hayward?
May ranks 5th of 12 months on our comfort score for Hayward (79 out of 100). It has about 18 comfortable days. 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.