Cloverdale, California climate: Normal weather by month, frost dates and records
Cloverdale's normal year runs from 38°F December nights to 94°F July afternoons, with 41.7 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 16.6°C, December lows of 3°C, July highs of 35°C, 1,060 mm of precipitation a year.
- NOAA stationCloverdale
- Station IDUSC00041838
- Location38.79°N 123.03°W
- Elevation400 ft (122 m)
- Population8,784
On October 23, the normal high in Cloverdale is 78°F and the normal low 48°F, and the chance of measurable rain or snow is 16%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Cloverdale.
- Jan 60° 38°
- Feb 63° 40°
- Mar 68° 42°
- Apr 74° 45°
- May 82° 50°
- Jun 89° 54°
- Jul 94° 55°
- Aug 93° 55°
- Sep 90° 54°
- Oct 81° 49°
- Nov 67° 42°
- Dec 59° 38°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Cloverdale each month?
July is the warmest month, with normal highs of 94°F; December the coldest, with normal lows of 38°F. The most precipitation falls in December (8.81 in), the least in July (0.01 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 60°F | 38°F | 49.1°F | 8.11 | 13 | <1 | 4 | 9 h 40 min |
| February | 63°F | 40°F | 51.8°F | 8.06 | 11 | <1 | 2 | 10 h 40 min |
| March | 68°F | 42°F | 55.2°F | 5.69 | 11 | <1 | 1 | 11 h 50 min |
| April | 74°F | 45°F | 59.3°F | 2.53 | 8 | 1 | <1 | 13 h 10 min |
| May | 82°F | 50°F | 65.7°F | 1.51 | 5 | 6 | <1 | 14 h 20 min |
| June | 89°F | 54°F | 71.9°F | 0.30 | 1 | 14 | <1 | 14 h 50 min |
| July | 94°F | 55°F | 74.8°F | 0.01 | <1 | 22 | <1 | 14 h 40 min |
| August | 93°F | 55°F | 74.0°F | 0.05 | <1 | 20 | <1 | 13 h 40 min |
| September | 90°F | 54°F | 71.7°F | 0.13 | 1 | 14 | <1 | 12 h 30 min |
| October | 81°F | 49°F | 64.8°F | 1.84 | 4 | 5 | <1 | 11 h 20 min |
| November | 67°F | 42°F | 54.6°F | 4.69 | 8 | <1 | 1 | 10 h 10 min |
| December | 59°F | 38°F | 48.2°F | 8.81 | 12 | <1 | 5 | 9 h 30 min |
| Year (annual) | 77°F | 47°F | 61.8°F | 41.73 | 73 | 84 | 13 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 15°C | 3°C | 9.5°C | 206 mm |
| February | 17°C | 5°C | 11.0°C | 205 mm |
| March | 20°C | 6°C | 12.9°C | 145 mm |
| April | 23°C | 7°C | 15.2°C | 64 mm |
| May | 28°C | 10°C | 18.7°C | 38 mm |
| June | 32°C | 12°C | 22.2°C | 8 mm |
| July | 35°C | 13°C | 23.8°C | 0 mm |
| August | 34°C | 13°C | 23.3°C | 1 mm |
| September | 32°C | 12°C | 22.1°C | 3 mm |
| October | 27°C | 9°C | 18.2°C | 47 mm |
| November | 19°C | 6°C | 12.6°C | 119 mm |
| December | 15°C | 3°C | 9.0°C | 224 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00041838; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Cloverdale?
Normal highs sit between 65°F and 85°F in March, April, May, October and November. Of those, October has the fewest days with rain (4).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00041838.
When is the last frost in Cloverdale?
In Cloverdale, the last spring frost (32°F) comes after February 25 in half of years and after April 2 in one year in ten; the first autumn frost comes before December 3 in half of years and before November 14 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- February 251 year in 10 after April 2; 9 in 10 after January 18
- First autumn frost, half of years before
- December 31 year in 10 before November 14; 9 in 10 before December 25
NOAA puts the median frost-free season at 279 days, and the season without a hard freeze (28°F) at 341 days.
A hard freeze (28°F) comes after January 12 in half of springs and before December 19 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Cloverdale in zone 9b in ZIP code 95425, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Cloverdale's NOAA station is in zone 9b: the coldest night of a typical year reaches 27°F (17 complete years).
Frost dates for every NOAA station in California · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00041838; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Cloverdale?
In a normal year in Cloverdale, 84 days a year reach 90°F (21 of them 100°F or more), 13 nights fall to 32°F or colder and 73 days bring measurable precipitation.
- Days at 90°F or more
- 84a normal year
- Days at 100°F or more
- 21a normal year
- Nights at 32°F or colder
- 13a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 73a normal year
The highest temperature in this station's record (since 1950) is 116°F, on June 14, 2000; the lowest is 17°F, on December 22, 1990.
The wettest calendar year on that record is 1973, with 68.03 in; the snowiest season is 1975–76, with 1.8 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00041838; records: ACIS (NOAA Regional Climate Centers), station USC00041838. Records use complete months only; a month missing more than three days is left out.
How sunny is Cloverdale?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Cloverdale, 4.7 kWh per square metre a day. June is the sunniest month (86%) and December the cloudiest (70%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 73% | 2.3 |
| February | 75% | 3.2 |
| March | 77% | 4.5 |
| April | 81% | 5.9 |
| May | 82% | 6.8 |
| June | 86% | 7.5 |
| July | 79% | 6.6 |
| August | 77% | 5.8 |
| September | 81% | 5.0 |
| October | 81% | 3.8 |
| November | 78% | 2.6 |
| December | 70% | 1.9 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Cloverdale need?
A normal year in Cloverdale brings 2,378 heating degree days, 56% fewer than the median U.S. place (5,373), and 1,210 cooling degree days, 33% more than the median (908). Five months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,557 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 495 | 0 |
| February | 370 | 0 |
| March | 307 | 5 |
| April | 191 | 22 |
| May | 71 | 92 |
| June | 12 | 219 |
| July | 1 | 304 |
| August | 1 | 279 |
| September | 9 | 210 |
| October | 84 | 76 |
| November | 318 | 4 |
| December | 521 | 0 |
| Year (annual) | 2,378 | 1,210 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00041838. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Cloverdale been warmer than normal lately?
2023 averaged 59.1°F, 2.7°F below the 1991-2020 normal of 61.8°F. 0 of the 3 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 60.3°F | −1.5°F | 30.37 |
| 2022 | 60.0°F | −1.8°F | 25.58 |
| 2023 | 59.1°F | −2.7°F | 54.37 |
Over 34 complete years from 1956 to 2023, the station's annual mean temperature rose at a fitted 2.7°F per century (+0.15°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00041838; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Cloverdale's climate compare?
Cloverdale is warmer than 118 of the other 218 places with their own NOAA record in California, and wetter than 190. Across the 7,247 U.S. stations with normals, its annual mean of 61.8°F is warmer than 79%.
In the Köppen classification computed from these normals, Cloverdale is Csa: temperate, dry-summer, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Questions about Cloverdale's climate
What is the coldest month in Cloverdale?
December, with a normal high of 59°F and a normal low of 38°F. The warmest is July (94°F by day, 55°F at night).
Does it snow in Cloverdale?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month in Cloverdale?
December, with 8.81 in of precipitation in a normal year; the driest is July with 0.01 in.
What plant hardiness zone is Cloverdale in?
The USDA's 2023 map puts Cloverdale in zone 9b in ZIP code 95425, the nearest ZIP area. By the same method at Cloverdale's NOAA station, the coldest night of a typical year reaches 27°F (17 years, 1991-2020): zone 9b.
How late can frost come in Cloverdale?
In half of years the last 32°F night comes after February 25; in one year in ten it comes after April 2. Waiting until April 2 leaves about a one-in-ten chance of a later frost.
Nearby and next
- California climateThe statewide normals and every place in the state
- Healdsburg, CA14 miles from this station, 60.2°F a year
- Fort Ross, CA22 miles from this station, 53.6°F a year
- Santa Rosa, CA23 miles from this station, 58.1°F a year
- Ukiah, CA25 miles from this station, 59.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made