Puerto Rico · 1991–2020

Best time to visit
Hatillo.

February leads for comfortable weather in Hatillo: typically 27.4°C by day, 16.5°C at night, with 89 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortFebruary

Typical high27.4°C

Typical low16.5°C

Rain in February89 mm

Comfort

February

February · January · December

73climate match

Beach

February

February · December · January

67climate match

Outdoors

February

February · January · December

50climate match

The weakest month is August, scoring 30 against February’s 73 — 247 mm of rain falls, and days average 30.5°C, 7° 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

7026.9° / 16.7°

Feb

7327.4° / 16.5°

Mar

6328° / 16.4°

Apr

5028.7° / 17.4°

May

3229.6° / 18.7°

Jun

4330.6° / 19.6°

Jul

4130.5° / 19.9°

Aug

3030.5° / 20°

Sep

3030.4° / 19.9°

Oct

3729.9° / 19.5°

Nov

4528.3° / 18.8°

Dec

6427.4° / 17.5°

Monthly climate evidence for Hatillo — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 16 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	26.9°C	16.7°C	116 mm	10.4	26.6°C	11 h 08	70	Strong coverage
February	27.4°C	16.5°C	89 mm	9.1	26.3°C	11 h 31	73	Strong coverage
March	28°C	16.4°C	137 mm	10.1	26.3°C	11 h 59	63	Strong coverage
April	28.7°C	17.4°C	195 mm	11.9	26.7°C	12 h 32	50	Strong coverage
May	29.6°C	18.7°C	264 mm	14.7	27.4°C	13 h	32	Strong coverage
June	30.6°C	19.6°C	174 mm	11.4	28.1°C	13 h 14	43	Strong coverage
July	30.5°C	19.9°C	179 mm	13.1	28.3°C	13 h 08	41	Strong coverage
August	30.5°C	20°C	247 mm	14.2	28.7°C	12 h 45	30	Strong coverage
September	30.4°C	19.9°C	240 mm	15.2	29.0°C	12 h 13	30	Strong coverage
October	29.9°C	19.5°C	214 mm	14.8	29.0°C	11 h 41	37	Strong coverage
November	28.3°C	18.8°C	205 mm	14.4	28.4°C	11 h 14	45	Strong coverage
December	27.4°C	17.5°C	124 mm	11.6	27.4°C	11 h 01	64	Strong coverage

Records at ARECIBO OBSY, 1980–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	33.9°C23 Jan 2013	7.2°C10 Jan 1999	113 mm20 Jan 2005	365 mm1997 · driest 16 mm in 1983	44
February	34.4°C13 Feb 1992	8.9°C15 Feb 2002	85 mm26 Feb 1999	214 mm2016 · driest 10 mm in 2006	46
March	34.4°C28 Mar 1982	8.3°C11 Mar 1997	165 mm29 Mar 2012	416 mm2012 · driest 6 mm in 1982	47
April	33.9°C29 Apr 2015	8.3°C8 Apr 1997	152 mm20 Apr 2025	498 mm2005 · driest 30 mm in 2019	45
May	34.4°C2 May 2023	10.6°C15 May 1996	146 mm28 May 1995	654 mm1995 · driest 38 mm in 2026	45
June	36.1°C8 Jun 2012	12.2°C21 Jun 1989	121 mm5 Jun 2011	331 mm1999 · driest 24 mm in 2000	45
July	36.1°C17 Jul 1998	11.1°C21 Jul 1989	161 mm15 Jul 1990	488 mm1990 · driest 32 mm in 2026	45
August	35.0°C26 Aug 2023	10.0°C11 Aug 2014	193 mm3 Aug 2014	429 mm2014 · driest 88 mm in 2008	43
September	35.0°C6 Sep 2004	11.7°C10 Sep 1996	145 mm9 Sep 1996	461 mm1984 · driest 42 mm in 2023	44
October	35.6°C4 Oct 2008	10.0°C8 Oct 2014	198 mm7 Oct 1985	473 mm1985 · driest 102 mm in 2018	44
November	33.9°C28 Nov 1993	12.2°C14 Nov 1988	166 mm8 Nov 2011	372 mm2011 · driest 52 mm in 1988	44
December	33.3°C13 Dec 2008	8.3°C26 Dec 1991	146 mm14 Dec 1981	308 mm1981 · driest 10 mm in 1989	45

Typical days per month at ARECIBO OBSY, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	26	4	3
February	24	4	3
March	28	8	4
April	28	8	5
May	29	15	8
June	29	21	6
July	30	22	5
August	30	22	7
September	29	20	7
October	30	16	7
November	28	7	6
December	26	4	4

How often, not how much — every day in ARECIBO OBSY’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	69%	31%	9%	37%	25.7–28.8°C
February	67%	34%	11%	40%	26.0–29.0°C
March	68%	32%	13%	40%	26.7–29.7°C
April	60%	41%	18%	52%	27.8–30.1°C
May	53%	47%	25%	66%	28.6–30.9°C
June	62%	38%	18%	50%	29.7–31.8°C
July	58%	42%	17%	61%	29.8–31.4°C
August	55%	45%	22%	66%	29.8–31.6°C
September	49%	52%	25%	75%	29.6–31.2°C
October	50%	50%	23%	73%	29.0–31.1°C
November	54%	46%	20%	63%	27.3–30.1°C
December	62%	38%	12%	51%	26.1–29.3°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.

1981Each stripe is one year’s mean temperature against the 30-year average. Warmest: 2024. Coolest: 1996.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4565346
NOAA station: RQC00660426 · ARECIBO OBSY
Station distance: 17.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 26 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 16 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 ARECIBO OBSY is what differs

Arecibo→Lares→Camuy→Carrizales→Rafael Gonzalez→Piedra Gorda→

Or put two places side by side: Hatillo vs Arecibo

Best time to visitHatillo.

February

February

February

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Hatillo.

The whole year,
without the guesswork.

Nearby, measured,
and named.