United States · 1991–2020

Best time to visit
Cardiff-by-the-Sea.

October leads for comfortable weather in Cardiff-by-the-Sea: typically 23°C by day, 14.9°C at night, with 15 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high23°C

Typical low14.9°C

Rain in October15 mm

Comfort

October

October · September · July

97climate match

Beach

August

August · July · September

79climate match

Outdoors

November

November · April · March

96climate match

The weakest month is February, scoring 64 against October’s 97 — days reach only 17.9°C, 6° below the 24°C the score treats as ideal.

Month by month

The whole year,
without the guesswork.

The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.

Jan

6918.7° / 8.9°

Feb

6417.9° / 9.1°

Mar

7218.1° / 10.5°

Apr

7718.9° / 11.8°

May

8419.6° / 14.2°

Jun

8921° / 15.9°

Jul

9323.5° / 18.2°

Aug

9324.3° / 18.6°

Sep

9524.2° / 17.6°

Oct

9723° / 14.9°

Nov

8320.7° / 11.3°

Dec

6618.2° / 8.6°

Monthly climate evidence for Cardiff-by-the-Sea — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 14 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	18.7°C	8.9°C	45 mm	4.6	15.2°C	10 h 11	69	Good coverage
February	17.9°C	9.1°C	59 mm	5.6	15.2°C	10 h 57	64	Good coverage
March	18.1°C	10.5°C	29 mm	3.9	15.5°C	11 h 53	72	Good coverage
April	18.9°C	11.8°C	25 mm	3.3	16.2°C	12 h 57	77	Good coverage
May	19.6°C	14.2°C	9 mm	1.4	17.5°C	13 h 50	84	Good coverage
June	21°C	15.9°C	1 mm	0.5	18.9°C	14 h 19	89	Good coverage
July	23.5°C	18.2°C	2 mm	0.3	20.7°C	14 h 08	93	Good coverage
August	24.3°C	18.6°C	1 mm	0.2	21.4°C	13 h 22	93	Good coverage
September	24.2°C	17.6°C	3 mm	0.4	21.0°C	12 h 20	95	Good coverage
October	23°C	14.9°C	15 mm	1.8	19.6°C	11 h 18	97	Good coverage
November	20.7°C	11.3°C	27 mm	3	17.7°C	10 h 25	83	Good coverage
December	18.2°C	8.6°C	46 mm	4.8	16.0°C	9 h 59	66	Good coverage

Records at CARLSBAD MCCLELLAN PALOMAR AP, 1998–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	32.2°C15 Jan 2021	0.6°C14 Jan 2007	70 mm9 Jan 2018	182 mm2023 · driest 2 mm in 2003	28
February	32.2°C16 Feb 2016	2.2°C5 Feb 2020	82 mm27 Feb 2017	154 mm2024 · driest 3 mm in 2016	28
March	33.9°C14 Mar 2015	3.3°C2 Mar 2023	47 mm15 Mar 2023	167 mm2023 · driest 0 mm in 2026	29
April	34.4°C12 Apr 2008	3.9°C2 Apr 1999	73 mm10 Apr 2020	163 mm2020 · driest 0 mm in 2008	29
May	30.0°C2 May 2014	7.2°C1 May 1999	21 mm22 May 2006	36 mm1998 · driest 0 mm in 2004	29
June	31.7°C30 Jun 2015	10.0°C5 Jun 1999	4 mm2 Jun 1999	8 mm1999 · driest 0 mm in 2012	29
July	36.7°C22 Jul 2006	13.9°C6 Jul 2000	14 mm19 Jul 2015	21 mm2015 · driest 0 mm in 2004	29
August	35.0°C31 Aug 1998	13.9°C24 Aug 2002	63 mm20 Aug 2023	64 mm2023 · driest 0 mm in 2009	28
September	38.3°C6 Sep 2020	12.2°C6 Sep 2005	19 mm15 Sep 2015	19 mm2015 · driest 0 mm in 2013	28
October	40.0°C24 Oct 2017	7.8°C31 Oct 2019	42 mm19 Oct 2010	125 mm2004 · driest 0 mm in 2001	28
November	37.2°C4 Nov 2010	2.8°C29 Nov 2004	68 mm30 Nov 2007	91 mm2008 · driest 0 mm in 2021	28
December	30.0°C12 Dec 2010	0.0°C24 Dec 2009	54 mm21 Dec 2010	182 mm2010 · driest 0 mm in 2000	28

Typical days per month at CARLSBAD MCCLELLAN PALOMAR AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	3	<1	2
February	2	<1	2
March	2	<1	1
April	2	<1	<1
May	1	<1	<1
June	2	<1	0
July	8	<1	0
August	10	<1	0
September	10	2	0
October	8	3	<1
November	5	<1	<1
December	2	0	1

How often, not how much — every day in CARLSBAD MCCLELLAN PALOMAR AP’s record sorted by what it was actually like, rather than averaged
Month	Warm & dry days	Wet days	Washouts	Week with 3+ wet days	Daytime mean has ranged
January	33%	15%	5%	15%	16.8–20.9°C
February	27%	19%	6%	22%	16.5–20.4°C
March	23%	14%	4%	11%	16.6–19.6°C
April	28%	10%	2%	6%	17.2–20.3°C
May	34%	4%	<1%	2%	18.1–21.0°C
June	75%	1%	0%	<1%	19.9–22.1°C
July	98%	1%	<1%	0%	22.1–24.3°C
August	99%	1%	<1%	0%	23.2–25.5°C
September	96%	2%	<1%	<1%	22.8–26.2°C
October	79%	5%	1%	4%	20.7–25.5°C
November	51%	10%	2%	7%	19.0–22.8°C
December	28%	15%	4%	16%	16.9–19.9°C

A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.

1999Each stripe is one year’s mean temperature against the 27-year average. Warmest: 2015. Coolest: 1999.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5334167
NOAA station: USW00003177 · CARLSBAD MCCLELLAN PALOMAR AP
Station distance: 12 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 22 usable years
Daylight: Calculated from latitude 33.02°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 14 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
Important limit: Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.

These places read the same station, so their numbers are identical — distance from CARLSBAD MCCLELLAN PALOMAR AP is what differs

Encinitas→Solana Beach→Lake San Marcos→Carlsbad Trailer Park→Eden Gardens→Farr→

Or put two places side by side: Cardiff-by-the-Sea vs Encinitas

Best time to visitCardiff-by-the-Sea.