Ukiah weather in May: Ukiah, California: normal highs, lows, rain and records for May
Ukiah in May has a normal high of 78°F and a normal low of 48°F, a daily mean of 63°F, rising from 74°F on the 1st to 81°F by the 31st. Measurable precipitation falls on 4 days in a normal May, 1.18 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 25°C and low of 9°C, 30 mm of precipitation in May.
- NOAA stationUkiah Municipal Airport
- Station IDUSW00023275
- Location39.13°N 123.20°W
- Elevation601 ft (183 m)
- Population16,067
- Jan 58° 37°
- Feb 61° 39°
- Mar 65° 41°
- Apr 69° 43°
- May 78° 48°
- Jun 86° 52°
- Jul 94° 56°
- Aug 94° 55°
- Sep 89° 51°
- Oct 79° 45°
- Nov 65° 40°
- Dec 57° 36°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Ukiah in May?
The normal high is 78°F and the normal low 48°F, for a daily mean of 62.7°F. May is 6.8°F warmer than April and 6.2°F cooler than June. May is the 5th warmest month of the year in Ukiah and the 8th wettest. Across the month the normal high rises 7°F, from 74°F on May 1 to 81°F on May 31. From one year to the next May's mean temperature typically moves about 3.1°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 19%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 74°F | 45°F | 19% | 11% |
| May 8 | 76°F | 47°F | 15% | 9% |
| May 15 | 78°F | 48°F | 13% | 8% |
| May 22 | 79°F | 49°F | 11% | 6% |
| May 31 | 81°F | 50°F | 9% | 4% |
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 | 74°F | 45°F | 19% | 11% | 13 h 50 min |
| May 2 | 74°F | 45°F | 18% | 10% | 13 h 50 min |
| May 3 | 74°F | 46°F | 18% | 10% | 13 h 50 min |
| May 4 | 75°F | 46°F | 17% | 10% | 14 h |
| May 5 | 75°F | 46°F | 17% | 9% | 14 h |
| May 6 | 75°F | 46°F | 16% | 9% | 14 h |
| May 7 | 76°F | 46°F | 16% | 9% | 14 h |
| May 8 | 76°F | 47°F | 15% | 9% | 14 h |
| May 9 | 76°F | 47°F | 15% | 8% | 14 h 10 min |
| May 10 | 76°F | 47°F | 14% | 8% | 14 h 10 min |
| May 11 | 77°F | 47°F | 14% | 8% | 14 h 10 min |
| May 12 | 77°F | 47°F | 14% | 8% | 14 h 10 min |
| May 13 | 77°F | 47°F | 14% | 8% | 14 h 10 min |
| May 14 | 77°F | 48°F | 13% | 8% | 14 h 20 min |
| May 15 | 78°F | 48°F | 13% | 8% | 14 h 20 min |
| May 16 | 78°F | 48°F | 13% | 7% | 14 h 20 min |
| May 17 | 78°F | 48°F | 13% | 7% | 14 h 20 min |
| May 18 | 78°F | 48°F | 12% | 7% | 14 h 20 min |
| May 19 | 79°F | 48°F | 12% | 7% | 14 h 20 min |
| May 20 | 79°F | 49°F | 12% | 7% | 14 h 30 min |
| May 21 | 79°F | 49°F | 11% | 6% | 14 h 30 min |
| May 22 | 79°F | 49°F | 11% | 6% | 14 h 30 min |
| May 23 | 80°F | 49°F | 11% | 6% | 14 h 30 min |
| May 24 | 80°F | 49°F | 10% | 6% | 14 h 30 min |
| May 25 | 80°F | 49°F | 10% | 6% | 14 h 30 min |
| May 26 | 80°F | 49°F | 10% | 5% | 14 h 40 min |
| May 27 | 80°F | 50°F | 10% | 5% | 14 h 40 min |
| May 28 | 81°F | 50°F | 9% | 5% | 14 h 40 min |
| May 29 | 81°F | 50°F | 9% | 5% | 14 h 40 min |
| May 30 | 81°F | 50°F | 9% | 5% | 14 h 40 min |
| May 31 | 81°F | 50°F | 9% | 4% | 14 h 40 min |
- Normal high
- 78°FMay average
- Normal low
- 48°FMay average
- Precipitation
- 1.18 inmonth total
- Days with precipitation
- 40.01 inch or more
- Days at 90°F or more
- 5
- Daylight
- 13 h 50 min to 14 h 40 minMay 1 to May 31
- Days at 70°F or more
- 24
- Days at 80°F or more
- 14
- Sunshine
- 84%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00023275; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Ukiah in May?
On a given May day the chance of 0.01 inch or more is 13% on average, highest around May 1 (19%). In all, 1.18 in falls on 4 days of a normal May.
In a normal May in Ukiah, 5 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00023275.
How humid and windy is Ukiah in May?
At 3 p.m. the normal temperature is 80°F with 33% relative humidity and a dew point of 48°F; at 6 a.m. it is 53°F with 79% humidity. The wind averages 5.1 mph, most often from the west-northwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 53°F | 47°F | 79% | 1.9 mph | – |
| 9 a.m. | 65°F | 49°F | 55% | 4.1 mph | 80% |
| noon | 77°F | 48°F | 37% | 7.3 mph | 80% |
| 3 p.m. | 80°F | 48°F | 33% | 10.1 mph | 82% |
| 6 p.m. | 74°F | 46°F | 38% | 8.4 mph | – |
| 9 p.m. | 62°F | 47°F | 57% | 4.4 mph | – |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00023275. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for May in Ukiah?
The warmest May temperature on Ukiah's official record (since 1893) is 106°F, on May 31, 2021; the coldest is 28°F, on May 31, 1919. The wettest May brought 6.42 in (1998).
The May mean against the 1991-2020 normal of 62.7°F: 2021 65.5°F (+2.8), 2022 61.5°F (−1.2), 2023 63.5°F (+0.8), 2024 65.3°F (+2.6), 2025 65.1°F (+2.4), 2026 65.2°F (+2.5). 5 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 65.5°F | +2.8°F | 0.00 in |
| 2022 | 61.5°F | −1.2°F | 0.36 in |
| 2023 | 63.5°F | +0.8°F | 1.24 in |
| 2024 | 65.3°F | +2.6°F | 1.15 in |
| 2025 | 65.1°F | +2.4°F | 0.23 in |
| 2026 | 65.2°F | +2.5°F | 0.28 in |
Source: records: ACIS, NWS threaded record UKIthr; recent months: ACIS, station USW00023275. Records and recent months use complete months only.
How does May in Ukiah 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; Ukiah's is 78°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.