United States · 1991–2020

Best time to visit
Pasadena.

March leads for comfortable weather in Pasadena: typically 23°C by day, 13.1°C at night, with 83 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMarch

Typical high23°C

Typical low13.1°C

Rain in March83 mm

Comfort

March

March · April · November

84climate match

Beach

May

May · April · October

74climate match

Outdoors

February

February · December · March

89climate match

The weakest month is August, scoring 30 against March’s 84 — days average 34.2°C, 10° above 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

5217.7° / 7.7°

Feb

6919.7° / 9.9°

Mar

8423° / 13.1°

Apr

7826.2° / 16.4°

May

5330° / 20.6°

Jun

3432.7° / 23.7°

Jul

3533.8° / 24.6°

Aug

3034.2° / 24.7°

Sep

4131.8° / 22.5°

Oct

6527.9° / 17.5°

Nov

7822.5° / 12.1°

Dec

5718.7° / 8.8°

Monthly climate evidence for Pasadena — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	17.7°C	7.7°C	104 mm	7.9	10 h 26	52	Strong coverage
February	19.7°C	9.9°C	72 mm	6	11 h 06	69	Strong coverage
March	23°C	13.1°C	83 mm	5.9	11 h 54	84	Strong coverage
April	26.2°C	16.4°C	104 mm	5.3	12 h 51	78	Strong coverage
May	30°C	20.6°C	138 mm	6.2	13 h 37	53	Strong coverage
June	32.7°C	23.7°C	155 mm	8.8	14 h 02	34	Strong coverage
July	33.8°C	24.6°C	116 mm	7.2	13 h 53	35	Strong coverage
August	34.2°C	24.7°C	138 mm	8	13 h 13	30	Strong coverage
September	31.8°C	22.5°C	146 mm	7.7	12 h 18	41	Strong coverage
October	27.9°C	17.5°C	147 mm	5.9	11 h 24	65	Strong coverage
November	22.5°C	12.1°C	99 mm	6.5	10 h 37	78	Strong coverage
December	18.7°C	8.8°C	110 mm	7.4	10 h 15	57	Strong coverage

What has changed

Pasadena runs +1.4°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

+1.7

Feb

+1.8

Mar

+1.8

Apr

+0.7

May

+0.9

Jun

+1.3

Jul

+1.0

Aug

+1.6

Sep

+1.5

Oct

+1.5

Nov

+0.9

Dec

+1.9

March daytime highs, 2011–2025. Last recorded: 26.3°C.

Records at HOUSTON WILLIAM P HOBBY AP, 1930–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	29.4°C23 Jan 1972	-15.0°C23 Jan 1940	104 mm27 Jan 1997	267 mm1944 · driest 5 mm in 1971	94
February	31.7°C28 Feb 1940	-10.0°C2 Feb 1951	99 mm1 Feb 1952	288 mm1959 · driest 2 mm in 1954	94
March	35.6°C30 Mar 1946	-5.6°C3 Mar 1943	127 mm17 Mar 1957	290 mm1957 · driest 2 mm in 1953	95
April	34.4°C28 Apr 1948	0.0°C13 Apr 1940	158 mm27 Apr 1972	397 mm2009 · driest 0 mm in 2011	89
May	37.8°C31 May 1998	6.7°C4 May 1978	241 mm3 May 1981	377 mm1970 · driest 0 mm in 1937	91
June	40.6°C29 Jun 2013	13.3°C1 Jun 1984	236 mm19 Jun 2006	589 mm2001 · driest 2 mm in 1934	90
July	40.6°C8 Jul 1939	17.8°C16 Jul 1967	180 mm7 Jul 1973	438 mm1979 · driest 2 mm in 1962	90
August	42.8°C27 Aug 2023	15.6°C21 Aug 1940	307 mm26 Aug 2017	987 mm2017 · driest 0 mm in 2023	91
September	42.2°C4 Sep 2000	10.0°C29 Sep 1967	224 mm19 Sep 1979	391 mm1958 · driest 4 mm in 1953	91
October	36.7°C14 Oct 2024	0.6°C31 Oct 1993	253 mm7 Oct 1949	567 mm1949 · driest 0 mm in 1978	90
November	32.2°C1 Nov 1934	-4.4°C25 Nov 1938	143 mm2 Nov 1943	365 mm1946 · driest 5 mm in 1949	95
December	30.6°C9 Dec 2021	-12.8°C23 Dec 1989	113 mm29 Dec 2010	249 mm1949 · driest 13 mm in 1970	95

Typical days per month at HOUSTON WILLIAM P HOBBY AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	3	0	2	3
February	5	<1	<1	2
March	13	<1	<1	3
April	22	4	0	3
May	30	18	0	3
June	30	27	0	4
July	31	30	0	3
August	31	30	0	3
September	30	24	0	4
October	25	11	0	3
November	12	1	<1	3
December	5	0	<1	3

The best month has moved. On the 1961–1990 numbers the strongest month here was April (scoring 85); on 2011–2025 it is March (93). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in HOUSTON WILLIAM P HOBBY 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	30%	26%	10%	26%	14.4–20.4°C
February	41%	23%	9%	19%	16.0–22.2°C
March	64%	19%	8%	13%	20.2–24.9°C
April	79%	19%	9%	15%	24.3–27.8°C
May	78%	22%	11%	21%	28.3–31.0°C
June	75%	26%	13%	28%	31.2–34.0°C
July	75%	25%	11%	25%	32.3–35.0°C
August	75%	26%	10%	28%	32.4–35.2°C
September	73%	27%	12%	29%	30.1–32.9°C
October	79%	19%	10%	18%	26.1–29.4°C
November	56%	23%	10%	21%	19.9–24.7°C
December	35%	25%	10%	24%	15.9–20.9°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.

1931Each stripe is one year’s mean temperature against the 86-year average. Warmest: 2023. Coolest: 1940.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4717782
NOAA station: USW00012918 · HOUSTON WILLIAM P HOBBY AP
Station distance: 8.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 29.69°, mid-month, sunrise to sunset including refraction. Not a station measurement.
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 HOUSTON WILLIAM P HOBBY AP is what differs

South Houston→Brookside Village→Allendale→Almeda→Almeda Plaza→Brookhaven→

Or put two places side by side: Pasadena vs South Houston

Best time to visitPasadena.

March

May

February

The whole year,without the guesswork.

Pasadena runs +1.4°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Pasadena.

The whole year,
without the guesswork.

Pasadena runs +1.4°C
on the 1961–1990 baseline.

Nearby, measured,
and named.