Carlsbad climate — normals and trends
Carlsbad (United States) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 16.7 °C and it receives 378 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 August (22.4 °C on average) and the coldest is January (11.9 °C). Rainfall peaks in February.
Carlsbad averages 0 frost days, 23 hot days (≥ 30 °C) and 41 rainy days per year.
Carlsbad has warmed by +1.6 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.
The hottest day of the period reached 40.2 °C (on 6 July 2018) and the coldest -2.1 °C (on 12 January 1949).
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
CarlsbadCalifornia
- coords
- 33.16°, -117.35°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.7°C
Average daily high
21.8°C
Average daily low
12.7°C
Annual rainfall
378mm
Sunshine / day
11.3h
Mean relative humidity
71%
Average peak wind
12.5km/h
Seasonal range
10.5°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
23 d/yr
Rainy days (≥ 1 mm)
41 d/yr
Annual snowfall
0.1 cm
Average feels-like high
22.1 °C
Average feels-like low
12.0 °C
Average peak gust
29.6 km/h
Tropical nights (≥ 20 °C)
18 d/yr
Solar radiation
20.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.42 · p = < 0.001
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
40.2 °C
6 July 2018
Coldest day
-2.1 °C
12 January 1949
Wettest day
75 mm
23 January 1943
Windiest day
41.1 km/h
30 November 1982
Strongest gust
89.3 km/h
30 November 1982
Hottest feels-like
42.8 °C
5 September 1984
Coldest feels-like
-6.2 °C
12 January 1949
Snowiest day
2.6 cm
25 January 1949
Sunniest day
14.0 h
22 June 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 | 18.5 °C | +1.1 °C | 19 mm | -53 mm |
| Feb | 19.1 °C | +1.5 °C | 58 mm | -21 mm |
| Mar | 17.0 °C | -1.0 °C | 96 mm | +29 mm |
| Apr | 18.8 °C | -0.7 °C | 16 mm | -16 mm |
| May | 21.8 °C | +0.8 °C | 12 mm | +1 mm |
| Jun | 24.4 °C | +0.5 °C | 1 mm | -1 mm |
| Jul | 25.3 °C | -1.7 °C | 1 mm | -1 mm |
| Aug | 27.9 °C | +0.2 °C | 4 mm | +2 mm |
| Sep | 26.6 °C | -0.3 °C | 14 mm | +8 mm |
| Oct | 23.8 °C | -0.3 °C | 24 mm | +7 mm |
| Nov | 21.6 °C | +0.8 °C | 105 mm | +68 mm |
| Dec | 20.7 °C | +2.8 °C | 51 mm | -2 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 Carlsbad?
Carlsbad has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 16.7 °C and it receives 378 mm of precipitation per year.
What is the hottest day ever recorded in Carlsbad?
The hottest day measured in Carlsbad between 1940 and 2025 was 6 July 2018, reaching 40.2 °C.
What is the coldest day in Carlsbad?
The coldest day measured in Carlsbad between 1940 and 2025 was 12 January 1949, at -2.1 °C.
Does it snow in Carlsbad?
Almost never: Carlsbad sees virtually no snow, with about 0 frost days per year.
Has the climate of Carlsbad warmed?
Yes: Carlsbad warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Carlsbad?
The wettest day measured in Carlsbad between 1940 and 2025 was 23 January 1943, with 75 mm of rain in 24 hours.
What was the windiest day in Carlsbad?
The windiest day measured in Carlsbad between 1940 and 2025 was 30 November 1982, with winds reaching 41.1 km/h.
What is the warmest month in Carlsbad?
The warmest month in Carlsbad is August (22.4 °C on average); the coldest is January (11.9 °C).
How much does it rain in Carlsbad?
Carlsbad receives on average 378 mm of precipitation per year, spread over about 41 rainy days.
Is it sunny in Carlsbad?
Carlsbad 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 Carlsbad?
The heaviest 24-hour snowfall measured in Carlsbad between 1940 and 2025 was 25 January 1949, with 2.6 cm.
Are there tropical nights in Carlsbad?
Yes: Carlsbad has on average 18 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Carlsbad?
In Carlsbad, between 1940 and 2025, the highest apparent temperature reached 42.8 °C on 5 September 1984, and the lowest was -6.2 °C on 12 January 1949.
Compare Carlsbad with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Carlsbad