Mexico · 1991–2020

Best time to visit
Arellano.

December leads for comfortable weather in Arellano: typically 29.7°C by day, 15.9°C at night, with 30 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortDecember

Typical high29.7°C

Typical low15.9°C

Rain in December30 mm

Comfort

December

December · January · February

80climate match

Beach

December

December · January · February

84climate match

Outdoors

December

December · January · February

60climate match

The weakest month is June, scoring 19 against December’s 80 — days average 34.1°C, 10° above the 24°C the score treats as ideal, and 254 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

7830.3° / 15.6°

Feb

7231.5° / 16.6°

Mar

6433.7° / 17.5°

Apr

5435.9° / 18.9°

May

4636° / 20.1°

Jun

1934.1° / 20.5°

Jul

3733.2° / 19.9°

Aug

2633.1° / 19.8°

Sep

2932.9° / 20°

Oct

4431.4° / 18.8°

Nov

6930.9° / 17.4°

Dec

8029.7° / 15.9°

Monthly climate evidence for Arellano — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 43 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	30.3°C	15.6°C	30 mm	2.2	24.1°C	11 h 05	78	Good coverage
February	31.5°C	16.6°C	24 mm	2	24.6°C	11 h 29	72	Good coverage
March	33.7°C	17.5°C	12 mm	0.8	25.6°C	11 h 59	64	Good coverage
April	35.9°C	18.9°C	19 mm	1.5	27.3°C	12 h 34	54	Good coverage
May	36°C	20.1°C	70 mm	3.9	28.6°C	13 h 02	46	Good coverage
June	34.1°C	20.5°C	254 mm	11	29.3°C	13 h 17	19	Good coverage
July	33.2°C	19.9°C	158 mm	10.3	29.2°C	13 h 12	37	Good coverage
August	33.1°C	19.8°C	228 mm	12.2	29.3°C	12 h 47	26	Good coverage
September	32.9°C	20°C	225 mm	10.1	29.5°C	12 h 14	29	Good coverage
October	31.4°C	18.8°C	174 mm	8.7	28.7°C	11 h 40	44	Good coverage
November	30.9°C	17.4°C	57 mm	3.7	26.8°C	11 h 12	69	Good coverage
December	29.7°C	15.9°C	30 mm	2.7	25.1°C	10 h 58	80	Good coverage

Records at HOOL, 1962–2011
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	38.9°C25 Jan 1983	5.6°C4 Jan 1980	67 mm27 Jan 1967	293 mm1972 · driest 0 mm in 1969	45
February	39.4°C28 Feb 1987	5.6°C10 Feb 2000	105 mm9 Feb 2002	147 mm2002 · driest 0 mm in 1998	47
March	41.7°C31 Mar 2000	6.7°C5 Mar 1994	40 mm15 Mar 1978	67 mm1978 · driest 0 mm in 1963	48
April	43.9°C26 Apr 2005	8.9°C2 Apr 2003	81 mm23 Apr 1966	331 mm1977 · driest 0 mm in 2005	47
May	45.6°C3 May 2002	8.9°C30 May 1973	130 mm25 May 1988	385 mm1984 · driest 0 mm in 1975	48
June	41.7°C1 Jun 1970	10.6°C1 Jun 1997	115 mm27 Jun 2011	421 mm1987 · driest 0 mm in 1975	48
July	40.0°C12 Jul 1980	11.1°C1 Jul 1998	103 mm7 Jul 1983	586 mm1977 · driest 0 mm in 1998	47
August	40.0°C1 Aug 1981	10.0°C6 Aug 1977	141 mm3 Aug 2000	1115 mm1977 · driest 0 mm in 1981	49
September	40.0°C23 Sep 1982	11.7°C16 Sep 1993	185 mm22 Sep 2002	678 mm2002 · driest 30 mm in 2001	48
October	39.4°C1 Oct 1981	10.0°C5 Oct 1995	157 mm1 Oct 1992	555 mm1995 · driest 0 mm in 1981	48
November	40.0°C4 Nov 1982	6.7°C16 Nov 1999	135 mm19 Nov 1984	192 mm2003 · driest 0 mm in 2008	47
December	39.4°C1 Dec 1982	5.6°C15 Dec 2010	134 mm2 Dec 1991	141 mm1991 · driest 0 mm in 1962	47

Typical days per month at HOOL, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	30	21	<1
February	27	22	<1
March	30	28	<1
April	30	28	<1
May	31	30	2
June	30	28	7
July	31	29	5
August	31	29	7
September	30	28	7
October	31	25	5
November	29	22	2
December	29	17	1

How often, not how much — every day in HOOL’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	91%	9%	4%	4%	28.3–32.5°C
February	94%	6%	2%	4%	29.5–33.5°C
March	97%	3%	2%	<1%	32.3–35.8°C
April	95%	5%	3%	3%	33.3–38.6°C
May	88%	12%	7%	14%	33.7–39.1°C
June	65%	35%	22%	47%	32.9–37.3°C
July	61%	38%	21%	51%	31.6–35.1°C
August	56%	44%	28%	61%	31.9–35.1°C
September	57%	42%	27%	57%	31.5–35.2°C
October	72%	28%	16%	29%	30.6–33.6°C
November	87%	13%	6%	9%	28.5–33.3°C
December	92%	8%	3%	6%	28.4–33.0°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.

1963Each stripe is one year’s mean temperature against the 35-year average. Warmest: 1965. Coolest: 1974.2009

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 3820811
NOAA station: MXN00004012 · HOOL
Station distance: 15.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 18 usable years
Daylight: Calculated from latitude 19.38°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 43 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 HOOL is what differs

Hool→Adolfo Ruiz Cortínez→Santa Cruz de Rovira→Nuevo Michoacán→Tiop→La Cuchilla→

Or put two places side by side: Arellano vs Hool

Best time to visitArellano.

December

December

December

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Arellano.

The whole year,
without the guesswork.

Nearby, measured,
and named.