Sunnyvale weather in May: Sunnyvale, California: normal highs, lows, rain and records for May
Sunnyvale in May has a normal high of 72°F and a normal low of 53°F, a daily mean of 62°F, rising from 70°F on the 1st to 74°F by the 31st. Measurable precipitation falls on 3 days in a normal May, 0.43 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 22°C and low of 11°C, 11 mm of precipitation in May.
- NOAA stationMoffett Federal Airfield
- Station IDUSW00023244
- Location37.41°N 122.05°W
- Elevation39 ft (12 m)
- From the center2 miles
- Population156,792
- Jan 59° 42°
- Feb 62° 45°
- Mar 65° 47°
- Apr 68° 49°
- May 72° 53°
- Jun 76° 56°
- Jul 77° 59°
- Aug 77° 59°
- Sep 78° 57°
- Oct 74° 53°
- Nov 66° 46°
- Dec 59° 42°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Sunnyvale in May?
The normal high is 72°F and the normal low 53°F, for a daily mean of 62.1°F. May is 3.7°F warmer than April and 3.7°F cooler than June. May is the 6th warmest month of the year in Sunnyvale and the 8th wettest. Across the month the normal high rises 4°F, from 70°F on May 1 to 74°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 60°F and 65°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 12%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 70°F | 51°F | 12% | 6% |
| May 8 | 71°F | 52°F | 10% | 4% |
| May 15 | 72°F | 52°F | 9% | 4% |
| May 22 | 72°F | 53°F | 7% | 3% |
| May 31 | 74°F | 54°F | 6% | 2% |
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 | 70°F | 51°F | 12% | 6% | 13 h 40 min |
| May 2 | 70°F | 51°F | 12% | 6% | 13 h 40 min |
| May 3 | 70°F | 51°F | 12% | 5% | 13 h 50 min |
| May 4 | 70°F | 51°F | 11% | 5% | 13 h 50 min |
| May 5 | 70°F | 51°F | 11% | 5% | 13 h 50 min |
| May 6 | 70°F | 51°F | 11% | 5% | 13 h 50 min |
| May 7 | 71°F | 51°F | 10% | 5% | 13 h 50 min |
| May 8 | 71°F | 52°F | 10% | 4% | 14 h |
| May 9 | 71°F | 52°F | 10% | 4% | 14 h |
| May 10 | 71°F | 52°F | 9% | 4% | 14 h |
| May 11 | 71°F | 52°F | 9% | 4% | 14 h |
| May 12 | 71°F | 52°F | 9% | 4% | 14 h |
| May 13 | 71°F | 52°F | 9% | 4% | 14 h 10 min |
| May 14 | 71°F | 52°F | 9% | 4% | 14 h 10 min |
| May 15 | 72°F | 52°F | 9% | 4% | 14 h 10 min |
| May 16 | 72°F | 53°F | 8% | 4% | 14 h 10 min |
| May 17 | 72°F | 53°F | 8% | 4% | 14 h 10 min |
| May 18 | 72°F | 53°F | 8% | 3% | 14 h 10 min |
| May 19 | 72°F | 53°F | 8% | 3% | 14 h 20 min |
| May 20 | 72°F | 53°F | 8% | 3% | 14 h 20 min |
| May 21 | 72°F | 53°F | 7% | 3% | 14 h 20 min |
| May 22 | 72°F | 53°F | 7% | 3% | 14 h 20 min |
| May 23 | 73°F | 53°F | 7% | 3% | 14 h 20 min |
| May 24 | 73°F | 53°F | 7% | 3% | 14 h 20 min |
| May 25 | 73°F | 54°F | 7% | 3% | 14 h 20 min |
| May 26 | 73°F | 54°F | 7% | 3% | 14 h 30 min |
| May 27 | 73°F | 54°F | 6% | 3% | 14 h 30 min |
| May 28 | 73°F | 54°F | 6% | 3% | 14 h 30 min |
| May 29 | 73°F | 54°F | 6% | 2% | 14 h 30 min |
| May 30 | 74°F | 54°F | 6% | 2% | 14 h 30 min |
| May 31 | 74°F | 54°F | 6% | 2% | 14 h 30 min |
- Normal high
- 72°FMay average
- Normal low
- 53°FMay average
- Precipitation
- 0.43 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
- 18
- Days at 80°F or more
- 4
- Sunshine
- 81%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00023244; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Sunnyvale in May?
On a given May day the chance of 0.01 inch or more is 9% on average, highest around May 1 (12%). In all, 0.43 in falls on 3 days of a normal May.
In a normal May in Sunnyvale, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00023244.
What are the records for May in Sunnyvale?
The warmest May temperature on this station's record (since 1945) is 103°F, on May 12, 1976; the coldest is 38°F, on May 6, 1950. The wettest May brought 1.74 in (1977).
The May mean against the 1991-2020 normal of 62.1°F: 2025 62.8°F (+0.7), 2026 62.8°F (+0.7). 2 of 2 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2025 | 62.8°F | +0.7°F | – |
| 2026 | 62.8°F | +0.7°F | – |
Source: records: ACIS, station USW00023244; recent months: ACIS, station USW00023244. Records and recent months use complete months only.
How does May in Sunnyvale 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; Sunnyvale's is 72°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.