Puerto Rico · 1991–2020

Best time to visit
Isabel Segunda.

February leads for comfortable weather in Isabel Segunda: typically 28.7°C by day, 22.4°C at night, with 44 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortFebruary

Typical high28.7°C

Typical low22.4°C

Rain in February44 mm

Comfort

February

February · March · January

65climate match

Beach

February

February · March · January

88climate match

Outdoors

February

February · March · January

44climate match

The weakest month is September, scoring 31 against February’s 65 — days average 31.6°C, 8° above the 24°C the score treats as ideal, and nights stay at 25°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

6028.5° / 22.2°

Feb

6528.7° / 22.4°

Mar

6329.2° / 22.7°

Apr

5329.9° / 23.5°

May

3930.5° / 24.5°

Jun

4431.3° / 25.5°

Jul

3631.5° / 25.6°

Aug

3631.7° / 25.8°

Sep

3131.6° / 25°

Oct

3731.3° / 24.6°

Nov

3730.2° / 23.9°

Dec

5329.1° / 23°

Monthly climate evidence for Isabel Segunda — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 8 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	28.5°C	22.2°C	67 mm	11.3	26.6°C	11 h 09	60	Good coverage
February	28.7°C	22.4°C	44 mm	8.8	26.3°C	11 h 31	65	Good coverage
March	29.2°C	22.7°C	46 mm	8.6	26.3°C	11 h 59	63	Good coverage
April	29.9°C	23.5°C	80 mm	9.8	26.8°C	12 h 32	53	Good coverage
May	30.5°C	24.5°C	136 mm	11.5	27.5°C	12 h 58	39	Good coverage
June	31.3°C	25.5°C	78 mm	10.8	28.1°C	13 h 13	44	Good coverage
July	31.5°C	25.6°C	109 mm	14	28.3°C	13 h 07	36	Good coverage
August	31.7°C	25.8°C	110 mm	13	28.7°C	12 h 44	36	Good coverage
September	31.6°C	25°C	148 mm	14.6	29.0°C	12 h 13	31	Good coverage
October	31.3°C	24.6°C	118 mm	13.5	28.9°C	11 h 42	37	Good coverage
November	30.2°C	23.9°C	148 mm	14.8	28.3°C	11 h 15	37	Good coverage
December	29.1°C	23°C	87 mm	12.2	27.4°C	11 h 03	53	Good coverage

What has changed

Isabel Segunda runs +0.5°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

0.0

Feb

+0.5

Mar

+0.7

Apr

+0.6

May

+0.5

Jun

+0.7

Jul

+0.6

Aug

+0.5

Sep

+0.5

Oct

+0.6

Nov

+0.4

Dec

+0.3

February daytime highs, 2011–2024. Last recorded: 28.5°C.

Records at ROOSEVELT ROADS, 1942–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	32.2°C16 Jan 1970	16.1°C19 Jan 2017	118 mm5 Jan 1992	275 mm1958 · driest 7 mm in 2014	66
February	32.2°C9 Feb 1995	16.1°C11 Feb 1973	73 mm6 Feb 2022	190 mm1950 · driest 9 mm in 2004	64
March	32.2°C24 Mar 1998	15.0°C6 Mar 1979	131 mm16 Mar 1987	174 mm1987 · driest 1 mm in 2025	65
April	35.6°C10 Apr 2012	17.2°C18 Apr 1976	117 mm17 Apr 2003	267 mm2003 · driest 0 mm in 2025	63
May	32.8°C27 May 1960	17.8°C2 May 1975	163 mm14 May 1979	690 mm1979 · driest 0 mm in 2025	65
June	35.0°C19 Jun 1969	20.0°C11 Jun 1978	91 mm22 Jun 1987	303 mm1987 · driest 0 mm in 2025	66
July	37.8°C14 Jul 2023	18.9°C19 Jul 1949	101 mm11 Jul 1993	265 mm1993 · driest 0 mm in 1947	64
August	35.0°C1 Aug 1993	20.0°C15 Aug 1973	117 mm30 Aug 1979	298 mm1979 · driest 0 mm in 1947	64
September	33.9°C17 Sep 1987	20.0°C6 Sep 1960	200 mm12 Sep 2011	405 mm1960 · driest 0 mm in 1947	66
October	34.4°C30 Oct 2020	20.0°C29 Oct 1982	214 mm24 Oct 1974	697 mm1970 · driest 0 mm in 1947	66
November	33.9°C7 Nov 1957	18.3°C30 Nov 2001	139 mm10 Nov 1966	494 mm1974 · driest 33 mm in 1989	65
December	35.0°C11 Dec 2007	16.7°C4 Dec 2010	145 mm12 Dec 1981	408 mm1981 · driest 21 mm in 2013	67

Typical days per month at ROOSEVELT ROADS, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	30	4	2
February	27	6	<1
March	28	12	1
April	29	18	2
May	30	24	3
June	28	27	2
July	30	28	3
August	29	29	3
September	29	28	4
October	30	27	3
November	29	21	4
December	29	8	2

The best month has moved. On the 1961–1990 numbers the strongest month here was February (scoring 71); on 2011–2025 it is January (70). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in ROOSEVELT ROADS’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	62%	38%	5%	53%	27.0–29.2°C
February	65%	35%	5%	44%	27.3–29.3°C
March	73%	27%	5%	33%	27.8–29.7°C
April	70%	31%	7%	39%	28.6–30.5°C
May	60%	40%	13%	57%	29.0–31.3°C
June	62%	38%	9%	54%	29.9–31.9°C
July	55%	45%	9%	66%	30.3–32.1°C
August	55%	44%	12%	66%	30.6–32.3°C
September	53%	47%	13%	70%	30.5–32.0°C
October	52%	48%	14%	72%	30.1–31.9°C
November	51%	49%	14%	70%	29.0–30.9°C
December	56%	44%	9%	59%	27.8–29.9°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.

1948Each stripe is one year’s mean temperature against the 50-year average. Warmest: 2020. Coolest: 1982.2023

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4565575
NOAA station: RQW00011630 · ROOSEVELT ROADS
Station distance: 24.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 20 usable years
Daylight: Calculated from latitude 18.15°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 8 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 ROOSEVELT ROADS is what differs

Fajardo→Luquillo→Ceiba→Punta Santiago→Naguabo→Aguas Claras→

Or put two places side by side: Isabel Segunda vs Fajardo

Best time to visitIsabel Segunda.

February

February

February

The whole year,without the guesswork.

Isabel Segunda runs +0.5°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Isabel Segunda.

The whole year,
without the guesswork.

Isabel Segunda runs +0.5°C
on the 1961–1990 baseline.

Nearby, measured,
and named.