Hayward weather in May: Hayward, California: normal highs, lows, rain and records for May
Hayward in May has a normal high of 69°F and a normal low of 52°F, a daily mean of 61°F, rising from 68°F on the 1st to 72°F by the 31st. Measurable precipitation falls on 3 days in a normal May, 0.58 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 21°C and low of 11°C, 15 mm of precipitation in May.
- NOAA stationHayward Air Terminal
- Station IDUSW00093228
- Location37.65°N 122.11°W
- Elevation43 ft (13 m)
- From the center2 miles
- Population158,440
- Jan 59° 43°
- Feb 62° 45°
- Mar 64° 47°
- Apr 67° 50°
- May 69° 52°
- Jun 74° 55°
- Jul 75° 57°
- Aug 76° 58°
- Sep 77° 58°
- Oct 74° 54°
- Nov 65° 47°
- Dec 59° 43°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Hayward in May?
The normal high is 69°F and the normal low 52°F, for a daily mean of 60.9°F. May is 2.7°F warmer than April and 3.7°F cooler than June. May is the 6th warmest month of the year in Hayward and the 8th wettest. Across the month the normal high rises 4°F, from 68°F on May 1 to 72°F on May 31. From one year to the next May's mean temperature typically moves about 2.5°F either way (NOAA's standard deviation), so roughly two Mays in three average between 58°F and 63°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 14%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 68°F | 51°F | 14% | 7% |
| May 8 | 68°F | 52°F | 12% | 5% |
| May 15 | 69°F | 52°F | 10% | 5% |
| May 22 | 70°F | 53°F | 8% | 4% |
| May 31 | 72°F | 54°F | 6% | 3% |
Every day of May: normal high, low and chance of precipitation (warmest afternoon May 31, coldest night May 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| May 1 | 68°F | 51°F | 14% | 7% | 13 h 40 min |
| May 2 | 68°F | 51°F | 14% | 6% | 13 h 50 min |
| May 3 | 68°F | 51°F | 13% | 6% | 13 h 50 min |
| May 4 | 68°F | 51°F | 13% | 6% | 13 h 50 min |
| May 5 | 68°F | 51°F | 13% | 6% | 13 h 50 min |
| May 6 | 68°F | 52°F | 12% | 6% | 13 h 50 min |
| May 7 | 68°F | 52°F | 12% | 5% | 14 h |
| May 8 | 68°F | 52°F | 12% | 5% | 14 h |
| May 9 | 68°F | 52°F | 11% | 5% | 14 h |
| May 10 | 68°F | 52°F | 11% | 5% | 14 h |
| May 11 | 69°F | 52°F | 11% | 5% | 14 h |
| May 12 | 69°F | 52°F | 11% | 5% | 14 h |
| May 13 | 69°F | 52°F | 10% | 5% | 14 h 10 min |
| May 14 | 69°F | 52°F | 10% | 5% | 14 h 10 min |
| May 15 | 69°F | 52°F | 10% | 5% | 14 h 10 min |
| May 16 | 69°F | 52°F | 10% | 5% | 14 h 10 min |
| May 17 | 69°F | 53°F | 10% | 4% | 14 h 10 min |
| May 18 | 69°F | 53°F | 9% | 4% | 14 h 20 min |
| May 19 | 70°F | 53°F | 9% | 4% | 14 h 20 min |
| May 20 | 70°F | 53°F | 9% | 4% | 14 h 20 min |
| May 21 | 70°F | 53°F | 9% | 4% | 14 h 20 min |
| May 22 | 70°F | 53°F | 8% | 4% | 14 h 20 min |
| May 23 | 70°F | 53°F | 8% | 4% | 14 h 20 min |
| May 24 | 70°F | 53°F | 8% | 3% | 14 h 20 min |
| May 25 | 70°F | 53°F | 8% | 3% | 14 h 30 min |
| May 26 | 71°F | 53°F | 7% | 3% | 14 h 30 min |
| May 27 | 71°F | 53°F | 7% | 3% | 14 h 30 min |
| May 28 | 71°F | 54°F | 7% | 3% | 14 h 30 min |
| May 29 | 71°F | 54°F | 7% | 3% | 14 h 30 min |
| May 30 | 71°F | 54°F | 6% | 3% | 14 h 30 min |
| May 31 | 72°F | 54°F | 6% | 3% | 14 h 30 min |
- Normal high
- 69°FMay average
- Normal low
- 52°FMay average
- Precipitation
- 0.58 inmonth total
- Days with precipitation
- 30.01 inch or more
- Days at 90°F or more
- 1
- Daylight
- 13 h 40 min to 14 h 30 minMay 1 to May 31
- Days at 70°F or more
- 11
- Days at 80°F or more
- 3
- Sunshine
- 81%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00093228; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Hayward in May?
On a given May day the chance of 0.01 inch or more is 10% on average, highest around May 1 (14%). In all, 0.58 in falls on 3 days of a normal May.
In a normal May in Hayward, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00093228.
What are the records for May in Hayward?
The warmest May temperature on this station's record (since 1998) is 99°F, on May 15, 2008; the coldest is 41°F, on May 11, 2022. The wettest May brought 1.32 in (2005).
The May mean against the 1991-2020 normal of 60.9°F: 2021 60.0°F (−0.9), 2022 60.1°F (−0.8), 2023 59.4°F (−1.5), 2024 63.0°F (+2.1), 2025 64.1°F (+3.2), 2026 61.5°F (+0.6). 3 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 60.0°F | −0.9°F | 0.03 in |
| 2022 | 60.1°F | −0.8°F | 0.00 in |
| 2023 | 59.4°F | −1.5°F | 0.81 in |
| 2024 | 63.0°F | +2.1°F | 0.90 in |
| 2025 | 64.1°F | +3.2°F | 0.26 in |
| 2026 | 61.5°F | +0.6°F | 0.36 in |
Source: records: ACIS, station USW00093228; recent months: ACIS, station USW00093228. Records and recent months use complete months only.
How does May in Hayward compare across California?
Across the 219 places PlainClimate covers in California, May normal highs run from 58°F in Tahoma to 96°F in Needles; Hayward's is 69°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.