Climate of Carlsbad
Carlsbad, a coastal city in San Diego County, has a cool semi-arid climate (Köppen BSk) with Mediterranean rainfall patterns, averaging 263 sunny days per year.[1] Winters are mild with periodic, erratic rain, while summers are largely rain-free but often overcast and cool due to fog off the Pacific.[1] Official climate normals for the area are recorded at the NOAA weather station located at McClellan–Palomar Airport (USW00003177), based on the 1991–2020 normals period.[2]
Overview
According to Wikipedia's entry on Carlsbad, the city's climate is classified as cool semi-arid (Köppen BSk) with Mediterranean-style rainfall patterns, and it averages 263 sunny days annually.[1] Frost is rare along the coast but occasionally occurs in inland valleys during December and January.[1] Hot, dry Santa Ana winds bring high temperatures on a few days each year, mostly in the fall, even though most days feature mild, pleasant temperatures.[1]
More broadly, the San Diego County entry on Wikipedia notes that the urban and suburban San Diego area straddles Mediterranean climate (Csa) to the north and hot semi-arid climate (BSh) to the south and east, often described as "arid Mediterranean" and "semi-arid steppe."[3] The region is characterized by warm, dry summers and mild winters, with most annual precipitation falling between November and March, an average of 201 days above 70°F (21°C), and low rainfall of 9–13 inches (23–33 cm) annually across the county.[3] Temperatures in the broader region exceed 90°F (32°C) only about four days a year.[3]
| Month | Mean Max (°F) | Mean Min (°F) | Mean (°F) |
|---|---|---|---|
| Jan | 65.0[2] | 47.8[2] | 56.4[2] |
| Feb | 64.0[2] | 48.5[2] | 56.3[2] |
| Mar | 64.5[2] | 50.8[2] | 57.6[2] |
| Apr | 66.3[2] | 53.3[2] | 59.8[2] |
| May | 67.6[2] | 57.4[2] | 62.5[2] |
| Jun | 69.9[2] | 60.3[2] | 65.1[2] |
| Jul | 74.2[2] | 64.1[2] | 69.2[2] |
| Aug | 75.8[2] | 65.3[2] | 70.5[2] |
| Sep | 75.7[2] | 63.6[2] | 69.6[2] |
| Oct | 73.3[2] | 58.9[2] | 66.1[2] |
| Nov | 69.5[2] | 52.1[2] | 60.8[2] |
| Dec | 64.6[2] | 47.3[2] | 56.0[2] |
| Annual | 69.2[2] | 55.8[2] | 62.5[2] |
Monthly normals
The table below presents NOAA's 1991–2020 climate normals for the Carlsbad Palomar Airport station (USW00003177), including mean daily maximum, minimum, and overall mean temperatures in degrees Fahrenheit for each month and for the year as a whole.[2] August is the warmest month on record for mean maximum temperature at 75.8°F, while January and December are the coolest, with mean maximums near 64–65°F.[2] The annual mean temperature across all months is 62.5°F.[2]
Rainfall
NOAA's 1991–2020 normals list a mean annual precipitation total of 11.39 inches for the Palomar Airport station, with February being the wettest normal month at 2.64 inches and August the driest at 0.03 inches.[2] The station records show that January through March account for a large share of annual rainfall, while June through September are nearly rain-free, consistent with the summer dry season described for the region.[2][1]
Separately, Wikipedia's Carlsbad entry describes year-to-year rainfall variability using "rain year" totals (July–June): the wettest rain year, from July 2022 to June 2023, recorded 21.56 inches (547.6 mm), while the driest, from July 2001 to June 2002, recorded only 3.62 inches (91.9 mm).[1] The wettest single month on record was January 2023, with 7.18 inches (182.4 mm) of rain, and the wettest single day was February 27, 2017, with 3.23 inches (82.0 mm).[1] These rain-year figures are not directly comparable to the NOAA 1991–2020 monthly normals, which reflect long-term averages rather than individual extreme years.[2][1]
Station location and coastal conditions
The NOAA normals cited here are measured at the station identified as "CARLSBAD PALOMAR AP, CA US," located at an elevation of 328 feet, latitude 33.1281° N and longitude 117.2794° W.[2] This station is associated with McClellan–Palomar Airport, which lies inland from the immediate coastline of Carlsbad.[2][1]
Wikipedia's Carlsbad entry notes that frost is rare along the coast but can occur in inland valleys, implying some variation in conditions across the city's geography, discussed further at Geography of Carlsbad.[1] Summer fog off the Pacific Ocean is cited as a factor that keeps many summer days overcast and cool despite the generally warm season, a maritime influence consistent with the city's location near features such as Agua Hedionda Lagoon and Beaches of Carlsbad.[1]
Common questions
What type of climate does Carlsbad have?
Carlsbad has a cool semi-arid climate (Köppen BSk) with Mediterranean rainfall patterns, according to Wikipedia.[1]
What is the average annual rainfall in Carlsbad?
NOAA's 1991–2020 normals for the Palomar Airport station list a mean annual precipitation total of 11.39 inches.[2]
Where is the official weather station for Carlsbad located?
The NOAA normals cited for Carlsbad come from a station at McClellan–Palomar Airport (USW00003177), at an elevation of 328 feet.[2]
What was the wettest rain year on record in Carlsbad?
The wettest "rain year" (July–June), from July 2022 to June 2023, saw 21.56 inches (547.6 mm) of rain, according to Wikipedia.[1]
Does Carlsbad get frost?
Frost is rare along the coast but sometimes occurs in inland valleys in December and January.[1]
Related topics
- Geography of Carlsbad
- McClellan-Palomar Airport
- Agua Hedionda Lagoon
- Beaches of Carlsbad
- Lagoons of Carlsbad
- Neighborhoods of Carlsbad
- La Costa
- Aviara
References
All sources retrieved November 2026.
- ^ a b c d e f g h i j k l m n o p q r s t "Carlsbad, California (Wikipedia)". Wikipedia. Retrieved November 2026.
- ^ a b c d e f g h i j k l m n o p q r s t u v w x y z "noaa_normals". NOAA National Centers for Environmental Information. Retrieved November 2026.
- ^ a b c "San Diego County, California (Wikipedia)". Wikipedia. Retrieved November 2026.