Covelo, California climate: Normal weather by month, frost dates and records
Covelo's normal year runs from 32°F December nights to 92°F July afternoons, with 40.4 inches of precipitation and 3 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 13.2°C, December lows of 0°C, July highs of 33°C, 1,027 mm of precipitation a year.
- NOAA stationCovelo
- Station IDUSC00042081
- Location39.82°N 123.24°W
- Elevation1,413 ft (431 m)
- Population (census place)1,495
On October 23, the normal high in Covelo is 71°F and the normal low 38°F, and the chance of measurable rain or snow is 19%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Covelo.
- Jan 52° 33°
- Feb 57° 34°
- Mar 62° 36°
- Apr 67° 38°
- May 75° 43°
- Jun 84° 48°
- Jul 92° 53°
- Aug 91° 51°
- Sep 88° 45°
- Oct 76° 39°
- Nov 58° 35°
- Dec 50° 32°
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 Covelo each month?
July is the warmest month, with normal highs of 92°F; December the coldest, with normal lows of 32°F. The most precipitation falls in December (8.79 in), the least in July (0.03 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 52°F | 33°F | 42.5°F | 7.82 | 0.7 | 13 | <1 | 16 | 9 h 40 min |
| February | 57°F | 34°F | 45.3°F | 6.76 | 1.4 | 13 | <1 | 12 | 10 h 40 min |
| March | 62°F | 36°F | 49.0°F | 5.19 | 0.2 | 11 | <1 | 10 | 11 h 50 min |
| April | 67°F | 38°F | 52.7°F | 2.81 | 0.2 | 9 | <1 | 5 | 13 h 10 min |
| May | 75°F | 43°F | 59.2°F | 1.64 | 0.0 | 6 | 3 | 1 | 14 h 20 min |
| June | 84°F | 48°F | 65.5°F | 0.76 | 0.0 | 3 | 8 | <1 | 15 h |
| July | 92°F | 53°F | 72.5°F | 0.03 | 0.0 | <1 | 23 | <1 | 14 h 40 min |
| August | 91°F | 51°F | 71.1°F | 0.16 | 0.0 | <1 | 22 | <1 | 13 h 50 min |
| September | 88°F | 45°F | 66.4°F | 0.20 | 0.0 | 1 | 15 | <1 | 12 h 30 min |
| October | 76°F | 39°F | 57.2°F | 2.00 | 0.0 | 5 | 3 | 5 | 11 h 10 min |
| November | 58°F | 35°F | 46.8°F | 4.28 | 0.2 | 11 | <1 | 11 | 10 h |
| December | 50°F | 32°F | 41.2°F | 8.79 | 0.6 | 15 | <1 | 16 | 9 h 20 min |
| Year (annual) | 71°F | 41°F | 55.8°F | 40.44 | 3.3 | 86 | 74 | 77 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 11°C | 0°C | 5.8°C | 199 mm | 2 cm |
| February | 14°C | 1°C | 7.4°C | 172 mm | 4 cm |
| March | 17°C | 2°C | 9.4°C | 132 mm | 1 cm |
| April | 20°C | 3°C | 11.5°C | 71 mm | 1 cm |
| May | 24°C | 6°C | 15.1°C | 42 mm | 0 cm |
| June | 29°C | 9°C | 18.6°C | 19 mm | 0 cm |
| July | 33°C | 12°C | 22.5°C | 1 mm | 0 cm |
| August | 33°C | 10°C | 21.7°C | 4 mm | 0 cm |
| September | 31°C | 7°C | 19.1°C | 5 mm | 0 cm |
| October | 24°C | 4°C | 14.0°C | 51 mm | 0 cm |
| November | 15°C | 2°C | 8.2°C | 109 mm | 1 cm |
| December | 10°C | 0°C | 5.1°C | 223 mm | 2 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00042081; 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 Covelo?
Normal highs sit between 65°F and 85°F in April, May, June and October. Of those, June has the fewest days with rain (3).
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 USC00042081.
When is the last frost in Covelo?
In Covelo, the last spring frost (32°F) comes after April 23 in half of years and after May 11 in one year in ten; the first autumn frost comes before October 19 in half of years and before October 2 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
- April 231 year in 10 after May 11; 9 in 10 after April 4
- First autumn frost, half of years before
- October 191 year in 10 before October 2; 9 in 10 before November 8
NOAA puts the median frost-free season at 179 days, and the season without a hard freeze (28°F) at 220 days.
A hard freeze (28°F) comes after March 29 in half of springs and before November 3 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Covelo in zone 9a in ZIP code 95428, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Covelo's NOAA station is in zone 8b: the coldest night of a typical year reaches 18°F (17 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in California · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00042081; 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 Covelo?
In a normal year in Covelo, 74 days a year reach 90°F (11 of them 100°F or more), 77 nights fall to 32°F or colder and 86 days bring measurable precipitation.
- Days at 90°F or more
- 74a normal year
- Days at 100°F or more
- 11a normal year
- Nights at 32°F or colder
- 77a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 86a normal year
- Days with 1 inch of snow or more
- 1a normal year
The highest temperature in this station's record (since 1935) is 115°F, on August 8, 1981; the lowest is −9°F, on December 9, 1972.
The wettest calendar year on that record is 1983, with 76.92 in; the snowiest season is 1948–49, with 23.7 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00042081; records: ACIS (NOAA Regional Climate Centers), station USC00042081. Records use complete months only; a month missing more than three days is left out.
How sunny is Covelo?
Over a year 84% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Covelo, 4.9 kWh per square metre a day. July is the sunniest month (93%) and December the cloudiest (68%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 71% | 2.2 |
| February | 73% | 3.1 |
| March | 74% | 4.3 |
| April | 79% | 5.8 |
| May | 84% | 7.0 |
| June | 91% | 8.0 |
| July | 93% | 7.9 |
| August | 91% | 6.9 |
| September | 90% | 5.6 |
| October | 85% | 4.0 |
| November | 77% | 2.5 |
| December | 68% | 1.8 |
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 Covelo need?
A normal year in Covelo brings 3,973 heating degree days, 26% fewer than the median U.S. place (5,373), and 632 cooling degree days, 30% fewer than the median (908). Six months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,078 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 699 | 0 |
| February | 553 | 0 |
| March | 498 | 0 |
| April | 368 | 1 |
| May | 200 | 20 |
| June | 63 | 80 |
| July | 5 | 239 |
| August | 5 | 194 |
| September | 45 | 87 |
| October | 252 | 12 |
| November | 547 | 0 |
| December | 738 | 0 |
| Year (annual) | 3,973 | 632 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00042081. 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.
How does Covelo's climate compare?
Covelo is warmer than 44 of the other 218 places with their own NOAA record in California, and wetter than 188. Across the 7,247 U.S. stations with normals, its annual mean of 55.8°F is warmer than 63%.
In the Köppen classification computed from these normals, Covelo 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.
Which places near Covelo share this climate record?
Laytonville has no NOAA station with 1991-2020 normals of its own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Laytonville, CA713 people · 17 mi SW
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Covelo's climate
What is the coldest month in Covelo?
December, with a normal high of 50°F and a normal low of 32°F. The warmest is July (92°F by day, 53°F at night).
Does it snow in Covelo?
Yes: 3 inches in a normal year, falling on 2 days with 0.1 inch or more, the most in February (1.4 inches).
What is the rainiest month in Covelo?
December, with 8.79 in of precipitation in a normal year; the driest is July with 0.03 in.
What plant hardiness zone is Covelo in?
The USDA's 2023 map puts Covelo in zone 9a in ZIP code 95428, the nearest ZIP area. By the same method at Covelo's NOAA station, the coldest night of a typical year reaches 18°F (17 years, 1991-2020): zone 8b.
How late can frost come in Covelo?
In half of years the last 32°F night comes after April 23; in one year in ten it comes after May 11. Waiting until May 11 leaves about a one-in-ten chance of a later frost.
Nearby and next
- California climateThe statewide normals and every place in the state
- Willits, CA28 miles from this station, 53.1°F a year
- Potter Valley, CA32 miles from this station, 59.1°F a year
- Richardson Grove State Park, CA32 miles from this station, 56.1°F a year
- Fort Bragg, CA35 miles from this station, 51.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made