Merced weather in May: Merced, California: normal highs, lows, rain and records for May
Merced in May has a normal high of 83°F and a normal low of 52°F, a daily mean of 67°F, rising from 79°F on the 1st to 86°F by the 31st. Measurable precipitation falls on 3 days in a normal May, 0.55 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 28°C and low of 11°C, 14 mm of precipitation in May.
- NOAA stationMerced Municipal Airport
- Station IDUSW00023257
- Location37.28°N 120.51°W
- Elevation152 ft (46 m)
- Population96,073
- Jan 56° 37°
- Feb 62° 39°
- Mar 68° 42°
- Apr 74° 45°
- May 83° 52°
- Jun 91° 58°
- Jul 96° 62°
- Aug 95° 61°
- Sep 91° 57°
- Oct 80° 49°
- Nov 66° 41°
- Dec 56° 36°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Merced in May?
The normal high is 83°F and the normal low 52°F, for a daily mean of 67.4°F. May is 7.7°F warmer than April and 6.8°F cooler than June. May is the 5th warmest month of the year in Merced and the 8th wettest. Across the month the normal high rises 7°F, from 79°F on May 1 to 86°F on May 31. From one year to the next May's mean temperature typically moves about 3.5°F either way (NOAA's standard deviation), so roughly two Mays in three average between 64°F and 71°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 11%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 79°F | 49°F | 11% | 5% |
| May 8 | 81°F | 50°F | 10% | 4% |
| May 15 | 83°F | 52°F | 8% | 4% |
| May 22 | 84°F | 54°F | 7% | 3% |
| May 31 | 86°F | 55°F | 5% | 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 | 79°F | 49°F | 11% | 5% | 13 h 40 min |
| May 2 | 79°F | 49°F | 11% | 5% | 13 h 40 min |
| May 3 | 79°F | 49°F | 11% | 5% | 13 h 50 min |
| May 4 | 80°F | 49°F | 11% | 5% | 13 h 50 min |
| May 5 | 80°F | 50°F | 10% | 4% | 13 h 50 min |
| May 6 | 80°F | 50°F | 10% | 4% | 13 h 50 min |
| May 7 | 81°F | 50°F | 10% | 4% | 13 h 50 min |
| May 8 | 81°F | 50°F | 10% | 4% | 14 h |
| May 9 | 81°F | 51°F | 9% | 4% | 14 h |
| May 10 | 81°F | 51°F | 9% | 4% | 14 h |
| May 11 | 82°F | 51°F | 9% | 4% | 14 h |
| May 12 | 82°F | 51°F | 9% | 4% | 14 h |
| May 13 | 82°F | 52°F | 9% | 4% | 14 h |
| May 14 | 82°F | 52°F | 9% | 4% | 14 h 10 min |
| May 15 | 83°F | 52°F | 8% | 4% | 14 h 10 min |
| May 16 | 83°F | 52°F | 8% | 4% | 14 h 10 min |
| May 17 | 83°F | 53°F | 8% | 4% | 14 h 10 min |
| May 18 | 83°F | 53°F | 8% | 4% | 14 h 10 min |
| May 19 | 84°F | 53°F | 8% | 4% | 14 h 20 min |
| May 20 | 84°F | 53°F | 8% | 3% | 14 h 20 min |
| May 21 | 84°F | 53°F | 7% | 3% | 14 h 20 min |
| May 22 | 84°F | 54°F | 7% | 3% | 14 h 20 min |
| May 23 | 84°F | 54°F | 7% | 3% | 14 h 20 min |
| May 24 | 85°F | 54°F | 7% | 3% | 14 h 20 min |
| May 25 | 85°F | 54°F | 7% | 3% | 14 h 20 min |
| May 26 | 85°F | 54°F | 6% | 3% | 14 h 30 min |
| May 27 | 85°F | 54°F | 6% | 3% | 14 h 30 min |
| May 28 | 86°F | 55°F | 6% | 3% | 14 h 30 min |
| May 29 | 86°F | 55°F | 6% | 3% | 14 h 30 min |
| May 30 | 86°F | 55°F | 6% | 2% | 14 h 30 min |
| May 31 | 86°F | 55°F | 5% | 2% | 14 h 30 min |
- Normal high
- 83°FMay average
- Normal low
- 52°FMay average
- Precipitation
- 0.55 inmonth total
- Days with precipitation
- 30.01 inch or more
- Days at 90°F or more
- 7
- Daylight
- 13 h 40 min to 14 h 30 minMay 1 to May 31
- Days at 70°F or more
- 29
- Days at 80°F or more
- 21
- Sunshine
- 92%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00023257; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Merced in May?
On a given May day the chance of 0.01 inch or more is 8% on average, highest around May 1 (11%). In all, 0.55 in falls on 3 days of a normal May.
In a normal May in Merced, 7 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00023257.
What are the records for May in Merced?
The warmest May temperature on Merced's official record (since 1899) is 109°F, on May 25, 1928; the coldest is 30°F, on May 16, 1978. The wettest May brought 2.13 in (1998).
The May mean against the 1991-2020 normal of 67.4°F: 2021 69.6°F (+2.2), 2022 68.7°F (+1.3), 2023 66.6°F (−0.8), 2024 68.7°F (+1.3), 2025 69.5°F (+2.0), 2026 68.4°F (+1.0). 5 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 69.6°F | +2.2°F | 0.00 in |
| 2022 | 68.7°F | +1.3°F | 0.00 in |
| 2023 | 66.6°F | −0.8°F | 0.77 in |
| 2024 | 68.7°F | +1.3°F | 0.56 in |
| 2025 | 69.5°F | +2.0°F | 0.00 in |
| 2026 | 68.4°F | +1.0°F | 0.15 in |
Source: records: ACIS, NWS threaded record MCEthr; recent months: ACIS, station USW00023257. Records and recent months use complete months only.
How does May in Merced 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; Merced's is 83°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.