Lompoc climate — normals and trends
Lompoc (United States) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 14.2 °C and it receives 374 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is September (17.0 °C on average) and the coldest is January (11.7 °C). Rainfall peaks in January.
Lompoc averages 0 frost days, 0 hot days (≥ 30 °C) and 37 rainy days per year.
Lompoc has warmed by +0.5 °C between 1940 and 2025, or +0.06 °C per decade. This trend is statistically significant.
The hottest day of the period reached 32.7 °C (on 1 September 1955) and the coldest -0.4 °C (on 22 December 1990).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
LompocCalifornia
- coords
- 34.64°, -120.46°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.2°C
Average daily high
17.3°C
Average daily low
11.7°C
Annual rainfall
374mm
Sunshine / day
11.3h
Mean relative humidity
75%
Average peak wind
20.9km/h
Seasonal range
5.3°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
37 d/yr
Annual snowfall
0.0 cm
Average feels-like high
16.1 °C
Average feels-like low
9.4 °C
Average peak gust
36.0 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
20.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.5 °C
since 1940
+0.1 °C per decade · r² = 0.09 · p = 0.006
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
32.7 °C
1 September 1955
Coldest day
-0.4 °C
22 December 1990
Wettest day
105 mm
5 December 1997
Windiest day
65.6 km/h
29 January 1983
Strongest gust
117.0 km/h
3 February 1998
Hottest feels-like
32.4 °C
1 September 1955
Coldest feels-like
-6.5 °C
22 December 1990
Snowiest day
1.1 cm
13 February 2001
Sunniest day
14.0 h
20 May 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 15.3 °C | +0.3 °C | 9 mm | -68 mm |
| Feb | 15.7 °C | +0.7 °C | 66 mm | -10 mm |
| Mar | 14.1 °C | -1.0 °C | 74 mm | +5 mm |
| Apr | 14.8 °C | -0.9 °C | 12 mm | -14 mm |
| May | 16.2 °C | -0.2 °C | 0 mm | -7 mm |
| Jun | 16.4 °C | -1.6 °C | 0 mm | -1 mm |
| Jul | 15.7 °C | -3.7 °C | 0 mm | -0 mm |
| Aug | 19.0 °C | -1.0 °C | 0 mm | -0 mm |
| Sep | 19.8 °C | -0.5 °C | 8 mm | +4 mm |
| Oct | 19.0 °C | -0.7 °C | 30 mm | +18 mm |
| Nov | 17.9 °C | +0.4 °C | 114 mm | +76 mm |
| Dec | 17.8 °C | +2.4 °C | 88 mm | +26 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Lompoc?
Lompoc has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 14.2 °C and it receives 374 mm of precipitation per year.
What is the hottest day ever recorded in Lompoc?
The hottest day measured in Lompoc between 1940 and 2025 was 1 September 1955, reaching 32.7 °C.
What is the coldest day in Lompoc?
The coldest day measured in Lompoc between 1940 and 2025 was 22 December 1990, at -0.4 °C.
Does it snow in Lompoc?
Almost never: Lompoc sees virtually no snow, with about 0 frost days per year.
Has the climate of Lompoc warmed?
Yes: Lompoc warmed by +0.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Lompoc?
The wettest day measured in Lompoc between 1940 and 2025 was 5 December 1997, with 105 mm of rain in 24 hours.
What was the windiest day in Lompoc?
The windiest day measured in Lompoc between 1940 and 2025 was 29 January 1983, with winds reaching 65.6 km/h.
What is the warmest month in Lompoc?
The warmest month in Lompoc is September (17.0 °C on average); the coldest is January (11.7 °C).
How much does it rain in Lompoc?
Lompoc receives on average 374 mm of precipitation per year, spread over about 37 rainy days.
Is it sunny in Lompoc?
Lompoc gets on average 11.3 hours of sunshine per day, roughly 4,125 hours per year over 1940-2025.
What is the biggest single-day snowfall in Lompoc?
The heaviest 24-hour snowfall measured in Lompoc between 1940 and 2025 was 13 February 2001, with 1.1 cm.
Are there tropical nights in Lompoc?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Lompoc.
What was the most extreme apparent temperature in Lompoc?
In Lompoc, between 1940 and 2025, the highest apparent temperature reached 32.4 °C on 1 September 1955, and the lowest was -6.5 °C on 22 December 1990.
Compare Lompoc with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Lompoc