Puerto Rico · 1991–2020

Best time to visit
San Antonio.

February leads for comfortable weather in San Antonio: typically 28.6°C by day, 19.8°C at night, with 63 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortFebruary

Typical high28.6°C

Typical low19.8°C

Rain in February63 mm

Comfort

February

February · March · January

69climate match

Beach

March

March · February · December

89climate match

Outdoors

February

February · March · January

48climate match

The weakest month is October, scoring 34 against February’s 69 — days average 31.2°C, 7° above the 24°C the score treats as ideal, and 168 mm of rain falls.

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

6328.6° / 20.1°

Feb

6928.6° / 19.8°

Mar

6629.4° / 20.2°

Apr

5529.8° / 21.5°

May

4130.4° / 22.3°

Jun

4631.1° / 23°

Jul

4331.4° / 23°

Aug

3831.5° / 23.4°

Sep

3631.6° / 23.5°

Oct

3431.2° / 23°

Nov

4330.1° / 22.3°

Dec

5929° / 20.8°

Monthly climate evidence for San Antonio — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 15 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	28.6°C	20.1°C	87 mm	8.7	26.6°C	11 h 08	63	Good coverage
February	28.6°C	19.8°C	63 mm	6.2	26.3°C	11 h 31	69	Good coverage
March	29.4°C	20.2°C	59 mm	6.3	26.3°C	11 h 59	66	Good coverage
April	29.8°C	21.5°C	104 mm	8.1	26.8°C	12 h 32	55	Good coverage
May	30.4°C	22.3°C	163 mm	10.7	27.5°C	13 h	41	Good coverage
June	31.1°C	23°C	110 mm	9.6	28.1°C	13 h 14	46	Good coverage
July	31.4°C	23°C	111 mm	11.2	28.3°C	13 h 08	43	Good coverage
August	31.5°C	23.4°C	133 mm	11.8	28.7°C	12 h 45	38	Good coverage
September	31.6°C	23.5°C	152 mm	10.9	29.0°C	12 h 13	36	Good coverage
October	31.2°C	23°C	168 mm	12.9	29.0°C	11 h 41	34	Good coverage
November	30.1°C	22.3°C	149 mm	12.1	28.4°C	11 h 14	43	Good coverage
December	29°C	20.8°C	91 mm	9.8	27.4°C	11 h 01	59	Good coverage

Records at BORINQUEN AP, 1942–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	34.4°C22 Jan 1977	15.0°C23 Jan 1980	95 mm26 Jan 2003	265 mm1959 · driest 3 mm in 1983	68
February	32.8°C26 Feb 2010	15.6°C17 Feb 1977	73 mm20 Feb 1971	177 mm1954 · driest 0 mm in 1983	65
March	35.0°C22 Mar 2010	13.9°C12 Mar 1982	113 mm25 Mar 1963	293 mm2007 · driest 1 mm in 2005	69
April	35.0°C25 Apr 1984	16.1°C5 Apr 1985	182 mm1 Apr 2006	359 mm1961 · driest 6 mm in 1997	69
May	35.0°C20 May 1980	15.6°C3 May 1976	112 mm27 May 1945	417 mm1982 · driest 18 mm in 1950	66
June	35.6°C14 Jun 1993	16.1°C17 Jun 1984	92 mm15 Jun 1956	313 mm1951 · driest 16 mm in 1985	64
July	35.6°C3 Jul 2012	17.8°C26 Jul 2010	76 mm5 Jul 1984	340 mm2010 · driest 18 mm in 1993	65
August	36.0°C6 Aug 2025	17.2°C1 Aug 1999	122 mm25 Aug 1988	270 mm1959 · driest 25 mm in 1987	65
September	35.6°C22 Sep 1987	17.8°C26 Sep 1977	120 mm16 Sep 2004	302 mm2004 · driest 8 mm in 1981	62
October	36.1°C17 Oct 1984	16.7°C24 Oct 1991	95 mm3 Oct 1958	302 mm2005 · driest 20 mm in 1980	65
November	36.1°C19 Nov 1987	16.7°C26 Nov 1979	103 mm28 Nov 1961	305 mm1969 · driest 22 mm in 1953	62
December	32.8°C14 Dec 1987	15.6°C7 Dec 2007	105 mm19 Dec 1969	298 mm1981 · driest 18 mm in 1993	63

Typical days per month at BORINQUEN AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	28	6	3
February	26	5	2
March	29	11	2
April	29	13	3
May	28	19	4
June	28	25	3
July	30	29	4
August	29	26	4
September	27	25	4
October	27	24	5
November	26	15	4
December	27	7	3

How often, not how much — every day in BORINQUEN 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	72%	27%	7%	29%	26.4–29.4°C
February	76%	24%	6%	24%	26.2–29.6°C
March	79%	21%	6%	23%	26.6–29.9°C
April	73%	27%	9%	31%	27.4–30.8°C
May	64%	36%	15%	51%	28.0–31.3°C
June	62%	37%	15%	48%	28.9–32.4°C
July	67%	33%	11%	44%	29.2–32.7°C
August	62%	38%	15%	54%	29.4–32.6°C
September	65%	36%	13%	48%	29.6–32.6°C
October	62%	38%	16%	48%	29.2–32.1°C
November	65%	35%	13%	46%	28.0–31.2°C
December	66%	33%	10%	40%	26.9–29.9°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.

1942Each stripe is one year’s mean temperature against the 45-year average. Warmest: 2010. Coolest: 1965.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4568069
NOAA station: RQW00011603 · BORINQUEN AP
Station distance: 3.3 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 15 usable years
Daylight: Calculated from latitude 18.49°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 15 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 BORINQUEN AP is what differs

Caban→Aguacate→Arenales→Camaceyes→Corrales→Cuatro Calles (historical)→

Or put two places side by side: San Antonio vs Caban

Best time to visitSan Antonio.

February

March

February

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
San Antonio.

The whole year,
without the guesswork.

Nearby, measured,
and named.