Gilroy weather in May: Gilroy, California: normal highs, lows, rain and records for May
Gilroy in May has a normal high of 77°F and a normal low of 49°F, a daily mean of 63°F, rising from 75°F on the 1st to 80°F by the 31st. Measurable precipitation falls on 3 days in a normal May, 0.56 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 25°C and low of 9°C, 14 mm of precipitation in May.
- NOAA stationGilroy
- Station IDUSC00043417
- Location37.00°N 121.56°W
- Elevation194 ft (59 m)
- From the center1 miles
- Population60,390
- Jan 61° 38°
- Feb 64° 40°
- Mar 68° 43°
- Apr 72° 45°
- May 77° 49°
- Jun 83° 52°
- Jul 87° 54°
- Aug 87° 54°
- Sep 85° 53°
- Oct 79° 48°
- Nov 68° 42°
- Dec 60° 37°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Gilroy in May?
The normal high is 77°F and the normal low 49°F, for a daily mean of 63.1°F. May is 4.9°F warmer than April and 4.1°F cooler than June. May is the 6th warmest month of the year in Gilroy and the 8th wettest. Across the month the normal high rises 5°F, from 75°F on May 1 to 80°F on May 31. From one year to the next May's mean temperature typically moves about 2.7°F either way (NOAA's standard deviation), so roughly two Mays in three average between 60°F and 66°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 | 75°F | 47°F | 12% | 7% |
| May 8 | 76°F | 48°F | 10% | 5% |
| May 15 | 77°F | 49°F | 8% | 4% |
| May 22 | 78°F | 50°F | 7% | 4% |
| May 31 | 80°F | 51°F | 5% | 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 | 75°F | 47°F | 12% | 7% | 13 h 40 min |
| May 2 | 75°F | 47°F | 12% | 6% | 13 h 40 min |
| May 3 | 75°F | 47°F | 12% | 6% | 13 h 40 min |
| May 4 | 75°F | 47°F | 12% | 6% | 13 h 50 min |
| May 5 | 75°F | 47°F | 11% | 6% | 13 h 50 min |
| May 6 | 76°F | 48°F | 11% | 6% | 13 h 50 min |
| May 7 | 76°F | 48°F | 11% | 5% | 13 h 50 min |
| May 8 | 76°F | 48°F | 10% | 5% | 13 h 50 min |
| May 9 | 76°F | 48°F | 10% | 5% | 14 h |
| May 10 | 76°F | 48°F | 10% | 5% | 14 h |
| May 11 | 77°F | 49°F | 9% | 5% | 14 h |
| May 12 | 77°F | 49°F | 9% | 5% | 14 h |
| May 13 | 77°F | 49°F | 9% | 4% | 14 h |
| May 14 | 77°F | 49°F | 9% | 4% | 14 h 10 min |
| May 15 | 77°F | 49°F | 8% | 4% | 14 h 10 min |
| May 16 | 77°F | 49°F | 8% | 4% | 14 h 10 min |
| May 17 | 78°F | 49°F | 8% | 4% | 14 h 10 min |
| May 18 | 78°F | 50°F | 8% | 4% | 14 h 10 min |
| May 19 | 78°F | 50°F | 7% | 4% | 14 h 10 min |
| May 20 | 78°F | 50°F | 7% | 4% | 14 h 20 min |
| May 21 | 78°F | 50°F | 7% | 4% | 14 h 20 min |
| May 22 | 78°F | 50°F | 7% | 4% | 14 h 20 min |
| May 23 | 79°F | 50°F | 6% | 3% | 14 h 20 min |
| May 24 | 79°F | 50°F | 6% | 3% | 14 h 20 min |
| May 25 | 79°F | 50°F | 6% | 3% | 14 h 20 min |
| May 26 | 79°F | 50°F | 6% | 3% | 14 h 20 min |
| May 27 | 79°F | 50°F | 6% | 3% | 14 h 30 min |
| May 28 | 79°F | 50°F | 5% | 3% | 14 h 30 min |
| May 29 | 80°F | 51°F | 5% | 3% | 14 h 30 min |
| May 30 | 80°F | 51°F | 5% | 3% | 14 h 30 min |
| May 31 | 80°F | 51°F | 5% | 3% | 14 h 30 min |
- Normal high
- 77°FMay average
- Normal low
- 49°FMay average
- Precipitation
- 0.56 inmonth total
- Days with precipitation
- 30.01 inch or more
- Days at 90°F or more
- 3
- Daylight
- 13 h 40 min to 14 h 30 minMay 1 to May 31
- Days at 70°F or more
- 26
- Days at 80°F or more
- 13
- Sunshine
- 90%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00043417; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Gilroy in May?
On a given May day the chance of 0.01 inch or more is 8% on average, highest around May 1 (12%). In all, 0.56 in falls on 3 days of a normal May.
In a normal May in Gilroy, 3 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00043417.
What are the records for May in Gilroy?
The warmest May temperature on this station's record (since 1957) is 106°F, on May 18, 1997; the coldest is 31°F, on May 4, 1959. The wettest May brought 2.34 in (1996).
The May mean against the 1991-2020 normal of 63.1°F: 2021 64.3°F (+1.2), 2022 65.2°F (+2.1), 2023 62.0°F (−1.1). 2 of 3 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 64.3°F | +1.2°F | 0.00 in |
| 2022 | 65.2°F | +2.1°F | 0.00 in |
| 2023 | 62.0°F | −1.1°F | 0.85 in |
Source: records: ACIS, station USC00043417; recent months: ACIS, station USC00043417. Records and recent months use complete months only.
How does May in Gilroy 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; Gilroy's is 77°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.