Mexico · 1991–2020

Best time to visit
Ulumal.

December leads for comfortable weather in Ulumal: typically 28.9°C by day, 16.7°C at night, with 26 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortDecember

Typical high28.9°C

Typical low16.7°C

Rain in December26 mm

Comfort

December

December · January · February

81climate match

Beach

December

December · January · February

88climate match

Outdoors

December

December · January · February

61climate match

The weakest month is August, scoring 22 against December’s 81 — days average 33°C, 9° above the 24°C the score treats as ideal, and 236 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

8029.2° / 16.5°

Feb

7330.7° / 17.6°

Mar

6432.9° / 18.8°

Apr

5435.1° / 20.5°

May

4635.7° / 21.4°

Jun

2534.4° / 22.1°

Jul

3533.3° / 21.5°

Aug

2233° / 21.5°

Sep

2532.2° / 21.4°

Oct

4431.2° / 20.5°

Nov

6730° / 18.5°

Dec

8128.9° / 16.7°

Monthly climate evidence for Ulumal — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 29 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	29.2°C	16.5°C	32 mm	2.9	24.1°C	11 h 05	80	Good coverage
February	30.7°C	17.6°C	39 mm	2.6	24.6°C	11 h 29	73	Good coverage
March	32.9°C	18.8°C	13 mm	1.2	25.6°C	11 h 59	64	Good coverage
April	35.1°C	20.5°C	27 mm	1.9	27.3°C	12 h 33	54	Good coverage
May	35.7°C	21.4°C	58 mm	4	28.6°C	13 h 02	46	Good coverage
June	34.4°C	22.1°C	185 mm	10.4	29.3°C	13 h 17	25	Good coverage
July	33.3°C	21.5°C	150 mm	9.8	29.2°C	13 h 11	35	Good coverage
August	33°C	21.5°C	236 mm	12.7	29.3°C	12 h 47	22	Good coverage
September	32.2°C	21.4°C	242 mm	11.9	29.5°C	12 h 14	25	Good coverage
October	31.2°C	20.5°C	156 mm	9.4	28.7°C	11 h 40	44	Good coverage
November	30°C	18.5°C	70 mm	5	26.8°C	11 h 12	67	Good coverage
December	28.9°C	16.7°C	26 mm	3	25.1°C	10 h 58	81	Good coverage

Records at PUSTUNICH, 1952–2011
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	42.2°C29 Jan 1960	3.9°C25 Jan 1981	95 mm11 Jan 2011	121 mm1968 · driest 0 mm in 1960	57
February	39.4°C13 Feb 1960	3.9°C14 Feb 1971	90 mm10 Feb 2008	199 mm1994 · driest 0 mm in 1985	57
March	48.3°C11 Mar 1960	3.9°C15 Mar 1970	45 mm23 Mar 2008	78 mm1990 · driest 0 mm in 1953	57
April	45.0°C22 Apr 1987	6.1°C6 Apr 1960	77 mm21 Apr 1993	166 mm1959 · driest 0 mm in 2009	58
May	48.3°C2 May 1953	11.1°C11 May 1966	92 mm21 May 1956	221 mm1956 · driest 0 mm in 1983	58
June	45.0°C17 Jun 1955	10.0°C29 Jun 1968	97 mm17 Jun 1999	365 mm2003 · driest 18 mm in 1970	57
July	41.1°C19 Jul 1980	12.2°C10 Jul 1988	103 mm7 Jul 1979	336 mm1978 · driest 25 mm in 2008	57
August	39.4°C16 Aug 1962	13.3°C27 Aug 1987	164 mm21 Aug 1996	458 mm1997 · driest 50 mm in 1983	56
September	40.0°C16 Sep 1997	14.4°C8 Sep 1989	220 mm23 Sep 2002	608 mm2002 · driest 65 mm in 2003	57
October	38.9°C4 Oct 1955	10.0°C21 Oct 1964	126 mm21 Oct 1979	381 mm1992 · driest 0 mm in 1984	56
November	38.3°C8 Nov 1980	6.7°C30 Nov 1966	63 mm4 Nov 1982	182 mm1998 · driest 3 mm in 1976	55
December	39.4°C28 Dec 1970	3.9°C26 Dec 1963	93 mm9 Dec 1978	131 mm1958 · driest 0 mm in 1985	57

Typical days per month at PUSTUNICH, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	28	15	<1
February	27	20	1
March	30	26	<1
April	30	27	<1
May	31	30	2
June	30	29	5
July	31	28	5
August	31	28	7
September	30	26	7
October	31	24	4
November	29	18	2
December	28	14	1

How often, not how much — every day in PUSTUNICH’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	90%	10%	3%	5%	27.3–32.4°C
February	93%	7%	2%	3%	28.3–33.7°C
March	96%	4%	1%	<1%	31.5–36.1°C
April	94%	6%	3%	3%	33.5–37.5°C
May	87%	13%	7%	16%	34.0–37.9°C
June	66%	34%	18%	46%	32.8–36.4°C
July	63%	37%	19%	51%	31.9–35.3°C
August	57%	43%	24%	61%	31.7–34.9°C
September	56%	44%	26%	60%	30.9–34.4°C
October	72%	29%	14%	31%	30.1–33.4°C
November	85%	15%	6%	10%	28.6–32.4°C
December	90%	10%	3%	6%	27.1–32.3°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.

1953Each stripe is one year’s mean temperature against the 47-year average. Warmest: 1953. Coolest: 2010.2010

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 3514930
NOAA station: MXN00004028 · PUSTUNICH
Station distance: 22.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 18 usable years
Daylight: Calculated from latitude 19.27°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 29 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 PUSTUNICH is what differs

Carrillo Puerto→San Pablo Pixtún→Maya Tecún I→Maya Tecún II→Pustunich→San Antonio Yacasay→

Or put two places side by side: Ulumal vs Carrillo Puerto

Best time to visitUlumal.

December

December

December

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Ulumal.

The whole year,
without the guesswork.

Nearby, measured,
and named.