Lompoc, California climate: Normal weather by month, frost dates and records
Lompoc's normal year runs from 42°F December nights to 75°F September afternoons, with 15.4 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 15.2°C, December lows of 6°C, September highs of 24°C, 391 mm of precipitation a year.
- NOAA stationLompoc
- Station IDUSC00045064
- Location34.65°N 120.45°W
- Elevation75 ft (23 m)
- Population43,594
On October 22, the normal high in Lompoc is 74°F and the normal low 50°F, and the chance of measurable rain or snow is 10%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Lompoc.
- Jan 65° 43°
- Feb 65° 44°
- Mar 67° 46°
- Apr 68° 47°
- May 69° 51°
- Jun 71° 53°
- Jul 73° 56°
- Aug 73° 56°
- Sep 75° 55°
- Oct 74° 51°
- Nov 70° 46°
- Dec 63° 42°
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 Lompoc each month?
September is the warmest month, with normal highs of 75°F; December the coldest, with normal lows of 42°F. The most precipitation falls in February (3.66 in), the least in August (0.01 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 65°F | 43°F | 54.0°F | 3.29 | 8 | <1 | 1 | 10 h |
| February | 65°F | 44°F | 54.6°F | 3.66 | 9 | <1 | 1 | 11 h |
| March | 67°F | 46°F | 56.6°F | 2.80 | 7 | <1 | <1 | 11 h 50 min |
| April | 68°F | 47°F | 57.8°F | 0.90 | 4 | <1 | <1 | 13 h |
| May | 69°F | 51°F | 59.9°F | 0.34 | 2 | 1 | <1 | 14 h |
| June | 71°F | 53°F | 61.8°F | 0.06 | 1 | <1 | <1 | 14 h 30 min |
| July | 73°F | 56°F | 64.0°F | 0.02 | 1 | <1 | <1 | 14 h 20 min |
| August | 73°F | 56°F | 64.6°F | 0.01 | <1 | <1 | <1 | 13 h 30 min |
| September | 75°F | 55°F | 64.8°F | 0.05 | 1 | 1 | <1 | 12 h 30 min |
| October | 74°F | 51°F | 62.6°F | 0.67 | 3 | 2 | <1 | 11 h 20 min |
| November | 70°F | 46°F | 57.8°F | 1.21 | 5 | <1 | <1 | 10 h 20 min |
| December | 63°F | 42°F | 52.7°F | 2.40 | 8 | <1 | 2 | 9 h 50 min |
| Year (annual) | 69°F | 49°F | 59.3°F | 15.41 | 47 | 5 | 4 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 18°C | 6°C | 12.2°C | 84 mm |
| February | 18°C | 7°C | 12.6°C | 93 mm |
| March | 20°C | 8°C | 13.7°C | 71 mm |
| April | 20°C | 9°C | 14.3°C | 23 mm |
| May | 21°C | 10°C | 15.5°C | 9 mm |
| June | 22°C | 12°C | 16.6°C | 2 mm |
| July | 23°C | 13°C | 17.8°C | 1 mm |
| August | 23°C | 13°C | 18.1°C | 0 mm |
| September | 24°C | 13°C | 18.2°C | 1 mm |
| October | 23°C | 11°C | 17.0°C | 17 mm |
| November | 21°C | 8°C | 14.3°C | 31 mm |
| December | 17°C | 6°C | 11.5°C | 61 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00045064; 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 Lompoc?
Normal highs sit between 65°F and 85°F in February, March, April, May, June, July, August, September, October and November. Of those, August has the fewest days with rain (0).
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 USC00045064.
When is the last frost in Lompoc?
In Lompoc, the last spring frost (32°F) comes after January 20 in half of years and after February 24 in one year in ten; the first autumn frost comes before December 19 in half of years and before November 27 in one year in ten. A night at 32°F or colder comes at all in 81% of years here (NOAA).
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- January 201 year in 10 after February 24; 9 in 10 after December 16
- First autumn frost, half of years before
- December 191 year in 10 before November 27; 9 in 10 before January 26
NOAA puts the median frost-free season at 335 days, and the season without a hard freeze (28°F) at 365 days.
A hard freeze (28°F) comes after January 1 in half of springs and before December 29 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Lompoc in zone 10a in ZIP code 93436, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Lompoc's NOAA station is in zone 9b: the coldest night of a typical year reaches 30°F (27 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 USC00045064; 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 Lompoc?
In a normal year in Lompoc, 5 days a year reach 90°F, 4 nights fall to 32°F or colder and 47 days bring measurable precipitation.
- Days at 90°F or more
- 5a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 4a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 47a normal year
The highest temperature in this station's record (since 1917) is 106°F, on September 24, 1978; the lowest is 20°F, on December 22, 1990.
The wettest calendar year on that record is 1978, with 29.80 in.
Source: NOAA NCEI 1991-2020 annual normals, station USC00045064; records: ACIS (NOAA Regional Climate Centers), station USC00045064. Records use complete months only; a month missing more than three days is left out.
How sunny is Lompoc?
Over a year 82% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Lompoc, 5.1 kWh per square metre a day. April is the sunniest month (86%) and July the cloudiest (79%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 83% | 3.1 |
| February | 82% | 3.9 |
| March | 83% | 5.2 |
| April | 86% | 6.4 |
| May | 84% | 7.0 |
| June | 81% | 7.0 |
| July | 79% | 6.6 |
| August | 80% | 6.1 |
| September | 83% | 5.4 |
| October | 84% | 4.3 |
| November | 86% | 3.4 |
| December | 82% | 2.7 |
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 Lompoc need?
A normal year in Lompoc brings 2,248 heating degree days, 58% fewer than the median U.S. place (5,373), and 168 cooling degree days, 81% fewer than the median (908). Two months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,461 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 343 | 0 |
| February | 291 | 1 |
| March | 261 | 2 |
| April | 221 | 5 |
| May | 165 | 7 |
| June | 107 | 11 |
| July | 56 | 25 |
| August | 43 | 33 |
| September | 48 | 43 |
| October | 107 | 32 |
| November | 225 | 9 |
| December | 381 | 0 |
| Year (annual) | 2,248 | 168 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00045064. 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 Lompoc been warmer than normal lately?
2025 averaged 59.4°F, 0.1°F above the 1991-2020 normal of 59.3°F. 1 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 58.6°F | −0.7°F | 14.52 |
| 2022 | 58.1°F | −1.2°F | 10.35 |
| 2023 | 58.1°F | −1.2°F | 26.93 |
| 2024 | 58.1°F | −1.2°F | 15.44 |
| 2025 | 59.4°F | +0.1°F | 15.27 |
Over 41 complete years from 1951 to 2025, the station's annual mean temperature rose at a fitted 1.9°F per century (+0.10°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00045064; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Lompoc's climate compare?
Lompoc is warmer than 79 of the other 218 places with their own NOAA record in California, and wetter than 108. Across the 7,247 U.S. stations with normals, its annual mean of 59.3°F is warmer than 73%.
In the Köppen classification computed from these normals, Lompoc is Csb: temperate, dry-summer, warm 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 Lompoc share this climate record?
4 places have no NOAA station with 1991-2020 normals of their 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.
- Vandenberg Village, CA6,793 people · 4 mi N
- Mission Hills, CA3,794 people · 2 mi N
- Vandenberg AFB, CA3,688 people · 6 mi NW
- Los Alamos, CA886 people · 12 mi NE
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 Lompoc's climate
What is the coldest month in Lompoc?
December, with a normal high of 63°F and a normal low of 42°F. The warmest is September (75°F by day, 55°F at night).
Does it snow in Lompoc?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month in Lompoc?
February, with 3.66 in of precipitation in a normal year; the driest is August with 0.01 in.
What plant hardiness zone is Lompoc in?
The USDA's 2023 map puts Lompoc in zone 10a in ZIP code 93436, the nearest ZIP area. By the same method at Lompoc's NOAA station, the coldest night of a typical year reaches 30°F (27 years, 1991-2020): zone 9b.
How late can frost come in Lompoc?
In half of years the last 32°F night comes after January 20; in one year in ten it comes after February 24. Waiting until February 24 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Lompoc in OctoberThis month day by day, its records and recent years
- California climateThe statewide normals and every place in the state
- Santa Maria, CA17 miles from this station, 58.6°F a year
- Twitchell Dam, CA24 miles from this station, 58.4°F a year
- Cachuma Lake, CA27 miles from this station, 60.1°F a year
- Pismo Beach, CA37 miles from this station, 59.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made