United States · 1991–2020

Best time to visit
Pasadena.

November leads for comfortable weather in Pasadena: typically 23.8°C by day, 10.5°C at night, with 29 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortNovember

Typical high23.8°C

Typical low10.5°C

Rain in November29 mm

Comfort

November

November · April · May

91climate match

Beach

June

June · July · September

83climate match

Outdoors

November

November · December · April

87climate match

The weakest month is February, scoring 61 against November’s 91 — 138 mm of rain falls, and nights drop to 8.6°C.

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

6220.2° / 8.3°

Feb

6121° / 8.6°

Mar

7922.7° / 9.8°

Apr

9024.8° / 11.1°

May

9026° / 13.1°

Jun

8428.9° / 15.1°

Jul

7031.9° / 17.4°

Aug

6433.1° / 18°

Sep

6932.3° / 17.2°

Oct

8428.5° / 14.3°

Nov

9123.8° / 10.5°

Dec

6419.6° / 7.8°

Monthly climate evidence for Pasadena — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 37 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	20.2°C	8.3°C	115 mm	6	14.9°C	10 h 06	62	Strong coverage
February	21°C	8.6°C	138 mm	6.6	14.8°C	10 h 54	61	Strong coverage
March	22.7°C	9.8°C	76 mm	4.6	14.8°C	11 h 52	79	Strong coverage
April	24.8°C	11.1°C	29 mm	2.3	15.1°C	12 h 59	90	Strong coverage
May	26°C	13.1°C	12 mm	1.8	16.6°C	13 h 55	90	Strong coverage
June	28.9°C	15.1°C	5 mm	0.7	18.2°C	14 h 25	84	Strong coverage
July	31.9°C	17.4°C	2 mm	0.3	19.7°C	14 h 13	70	Strong coverage
August	33.1°C	18°C	1 mm	0.1	20.2°C	13 h 25	64	Strong coverage
September	32.3°C	17.2°C	5 mm	0.5	20.0°C	12 h 21	69	Strong coverage
October	28.5°C	14.3°C	21 mm	1.8	19.0°C	11 h 16	84	Strong coverage
November	23.8°C	10.5°C	29 mm	2.5	17.3°C	10 h 20	91	Strong coverage
December	19.6°C	7.8°C	83 mm	4.8	15.6°C	9 h 53	64	Strong coverage

What has changed

Pasadena runs +1.2°C
on the 1961–1990 baseline.

Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.

Jan

+0.7

Feb

+0.4

Mar

+1.1

Apr

+1.7

May

+0.6

Jun

+1.6

Jul

+0.9

Aug

+1.7

Sep

+1.8

Oct

+1.8

Nov

+1.4

Dec

+0.3

November daytime highs, 2011–2025. Last recorded: 23.6°C.

Records at PASADENA, 1893–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	33.9°C18 Jan 1971	-6.1°C7 Jan 1913	180 mm22 Jan 1943	469 mm1995 · driest 0 mm in 2003	121
February	35.6°C27 Feb 2026	-3.3°C9 Feb 1929	159 mm24 Feb 1913	500 mm1980 · driest 0 mm in 1912	120
March	38.3°C19 Mar 2026	-1.7°C12 Mar 1922	196 mm2 Mar 1938	327 mm1978 · driest 0 mm in 2026	119
April	40.6°C6 Apr 1989	-0.6°C18 Apr 1917	97 mm5 Apr 1926	255 mm1926 · driest 0 mm in 1993	119
May	40.0°C15 May 2014	0.0°C1 May 1915	46 mm9 May 1977	136 mm1921 · driest 0 mm in 1997	120
June	45.0°C17 Jun 1917	5.0°C1 Jun 1916	40 mm16 Jun 1995	49 mm1995 · driest 0 mm in 1946	120
July	45.0°C7 Jul 2018	7.2°C10 Jul 1933	11 mm1 Jul 1918	21 mm1992 · driest 0 mm in 1931	120
August	42.8°C18 Aug 2020	6.1°C28 Aug 1912	87 mm21 Aug 2023	117 mm2023 · driest 0 mm in 1937	121
September	46.1°C6 Sep 2020	5.0°C27 Sep 1911	125 mm25 Sep 1939	150 mm1939 · driest 0 mm in 1941	121
October	42.2°C11 Oct 1991	2.2°C27 Oct 1919	131 mm20 Oct 2004	223 mm2004 · driest 0 mm in 1965	120
November	38.3°C4 Nov 2010	-3.3°C28 Nov 1919	141 mm29 Nov 1970	349 mm1965 · driest 0 mm in 1948	119
December	33.9°C3 Dec 1958	-3.9°C27 Dec 1916	157 mm31 Dec 1933	383 mm2010 · driest 0 mm in 2017	120

Typical days per month at PASADENA, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	6	<1	3
February	7	2	4
March	11	3	2
April	14	5	<1
May	18	6	<1
June	25	12	<1
July	30	23	0
August	31	26	0
September	28	22	<1
October	23	13	<1
November	12	3	<1
December	4	<1	2

How often, not how much — every day in PASADENA’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	44%	18%	9%	21%	16.3–22.1°C
February	48%	20%	10%	24%	16.8–23.4°C
March	58%	17%	8%	15%	18.2–24.4°C
April	71%	11%	4%	7%	20.1–26.2°C
May	84%	5%	1%	3%	22.5–27.6°C
June	95%	2%	<1%	<1%	25.1–30.7°C
July	99%	<1%	<1%	<1%	29.8–33.4°C
August	99%	1%	<1%	<1%	30.1–34.2°C
September	97%	3%	<1%	1%	28.3–33.1°C
October	91%	6%	2%	2%	24.8–30.1°C
November	75%	9%	4%	8%	20.9–26.1°C
December	45%	15%	8%	14%	17.2–22.5°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.

1909Each stripe is one year’s mean temperature against the 114-year average. Warmest: 2014. Coolest: 1916.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5381396
NOAA station: USC00046719 · PASADENA
Station distance: 0.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 34.15°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 37 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 PASADENA is what differs

Altadena→South Pasadena→La Cañada Flintridge→Sierra Madre→Adams Square→Altacanyada→

Or put two places side by side: Pasadena vs Altadena

Best time to visitPasadena.

November

June

November

The whole year,without the guesswork.

Pasadena runs +1.2°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Pasadena.

The whole year,
without the guesswork.

Pasadena runs +1.2°C
on the 1961–1990 baseline.

Nearby, measured,
and named.