Clearlake weather in May: Clearlake, California: normal highs, lows, rain and records for May
Clearlake in May has a normal high of 73°F and a normal low of 45°F, a daily mean of 59°F, rising from 69°F on the 1st to 77°F by the 31st. Measurable precipitation falls on 5 days in a normal May, 1.16 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 7°C, 29 mm of precipitation in May.
- NOAA stationClearlake (4 mi SE)
- Station IDUSC00041806
- Location38.92°N 122.57°W
- Elevation1,349 ft (411 m)
- From the center4 miles
- Population16,636
- Jan 55° 33°
- Feb 58° 34°
- Mar 62° 35°
- Apr 66° 39°
- May 73° 45°
- Jun 83° 52°
- Jul 91° 56°
- Aug 91° 54°
- Sep 85° 50°
- Oct 75° 43°
- Nov 63° 36°
- Dec 55° 33°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Clearlake in May?
The normal high is 73°F and the normal low 45°F, for a daily mean of 58.8°F. May is 6.0°F warmer than April and 8.5°F cooler than June. May is the 6th warmest month of the year in Clearlake and the 7th wettest. Across the month the normal high rises 8°F, from 69°F on May 1 to 77°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 55°F and 62°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 22%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 69°F | 42°F | 22% | 11% |
| May 8 | 70°F | 43°F | 20% | 10% |
| May 15 | 72°F | 45°F | 17% | 9% |
| May 22 | 74°F | 46°F | 15% | 8% |
| May 31 | 77°F | 48°F | 11% | 6% |
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 | 69°F | 42°F | 22% | 11% | 13 h 50 min |
| May 2 | 69°F | 42°F | 22% | 11% | 13 h 50 min |
| May 3 | 69°F | 42°F | 22% | 11% | 13 h 50 min |
| May 4 | 70°F | 43°F | 21% | 11% | 13 h 50 min |
| May 5 | 70°F | 43°F | 21% | 10% | 14 h |
| May 6 | 70°F | 43°F | 21% | 10% | 14 h |
| May 7 | 70°F | 43°F | 20% | 10% | 14 h |
| May 8 | 70°F | 43°F | 20% | 10% | 14 h |
| May 9 | 71°F | 44°F | 19% | 10% | 14 h |
| May 10 | 71°F | 44°F | 19% | 9% | 14 h 10 min |
| May 11 | 71°F | 44°F | 19% | 9% | 14 h 10 min |
| May 12 | 71°F | 44°F | 18% | 9% | 14 h 10 min |
| May 13 | 72°F | 44°F | 18% | 9% | 14 h 10 min |
| May 14 | 72°F | 45°F | 18% | 9% | 14 h 10 min |
| May 15 | 72°F | 45°F | 17% | 9% | 14 h 20 min |
| May 16 | 72°F | 45°F | 17% | 9% | 14 h 20 min |
| May 17 | 73°F | 45°F | 17% | 8% | 14 h 20 min |
| May 18 | 73°F | 45°F | 16% | 8% | 14 h 20 min |
| May 19 | 73°F | 46°F | 16% | 8% | 14 h 20 min |
| May 20 | 73°F | 46°F | 16% | 8% | 14 h 20 min |
| May 21 | 74°F | 46°F | 15% | 8% | 14 h 30 min |
| May 22 | 74°F | 46°F | 15% | 8% | 14 h 30 min |
| May 23 | 74°F | 46°F | 15% | 7% | 14 h 30 min |
| May 24 | 75°F | 47°F | 14% | 7% | 14 h 30 min |
| May 25 | 75°F | 47°F | 14% | 7% | 14 h 30 min |
| May 26 | 75°F | 47°F | 13% | 7% | 14 h 30 min |
| May 27 | 76°F | 47°F | 13% | 7% | 14 h 40 min |
| May 28 | 76°F | 48°F | 13% | 6% | 14 h 40 min |
| May 29 | 76°F | 48°F | 12% | 6% | 14 h 40 min |
| May 30 | 77°F | 48°F | 12% | 6% | 14 h 40 min |
| May 31 | 77°F | 48°F | 11% | 6% | 14 h 40 min |
- Normal high
- 73°FMay average
- Normal low
- 45°FMay average
- Precipitation
- 1.16 inmonth total
- Days with precipitation
- 50.01 inch or more
- Days at 90°F or more
- 2
- Daylight
- 13 h 50 min to 14 h 40 minMay 1 to May 31
- Days at 70°F or more
- 22
- Days at 80°F or more
- 11
- Sunshine
- 88%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00041806; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Clearlake in May?
On a given May day the chance of 0.01 inch or more is 17% on average, highest around May 1 (22%). In all, 1.16 in falls on 5 days of a normal May.
In a normal May in Clearlake, 2 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00041806.
What are the records for May in Clearlake?
The warmest May temperature on this station's record (since 1954) is 101°F, on May 29, 1984; the coldest is 28°F, on May 4, 1964. The wettest May brought 5.99 in (1998).
The May mean against the 1991-2020 normal of 58.8°F: 2025 63.8°F (+5.0), 2026 63.5°F (+4.8). 2 of 2 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2025 | 63.8°F | +5.0°F | 0.10 in |
| 2026 | 63.5°F | +4.8°F | 0.67 in |
Source: records: ACIS, station USC00041806; recent months: ACIS, station USC00041806. Records and recent months use complete months only.
How does May in Clearlake 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; Clearlake's is 73°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.