Mexico · 1991–2020

Best time to visit
Tehuantepec.

October leads for comfortable weather in Tehuantepec: typically 29.4°C by day, 14.3°C at night, with 56 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high29.4°C

Typical low14.3°C

Rain in October56 mm

Comfort

October

October · November · December

76climate match

Beach

October

October · November · September

75climate match

Outdoors

December

December · January · November

71climate match

The weakest month is June, scoring 53 against October’s 76 — days average 32.3°C, 8° 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

7328.5° / 8.1°

Feb

6830.1° / 8.6°

Mar

6432.2° / 10°

Apr

6134° / 11.9°

May

6235° / 14.1°

Jun

5332.3° / 16.6°

Jul

5629.2° / 16.1°

Aug

5929° / 16°

Sep

6728.7° / 16°

Oct

7629.4° / 14.3°

Nov

7429.4° / 10.6°

Dec

7428.3° / 8.2°

Monthly climate evidence for Tehuantepec — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	28.5°C	8.1°C	28 mm	1.6	11 h 02	73	Good coverage
February	30.1°C	8.6°C	9 mm	0.6	11 h 27	68	Good coverage
March	32.2°C	10°C	3 mm	0.7	11 h 59	64	Good coverage
April	34°C	11.9°C	3 mm	0.4	12 h 35	61	Good coverage
May	35°C	14.1°C	32 mm	3.1	13 h 05	62	Good coverage
June	32.3°C	16.6°C	106 mm	10.2	13 h 20	53	Good coverage
July	29.2°C	16.1°C	138 mm	14.9	13 h 14	56	Good coverage
August	29°C	16°C	123 mm	14.4	12 h 49	59	Good coverage
September	28.7°C	16°C	97 mm	10.8	12 h 14	67	Good coverage
October	29.4°C	14.3°C	56 mm	4.8	11 h 39	76	Good coverage
November	29.4°C	10.6°C	6 mm	1	11 h 09	74	Good coverage
December	28.3°C	8.2°C	6 mm	0.7	10 h 55	74	Good coverage

Records at ATOYAC, 1943–2012
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	36.7°C11 Jan 1991	0.0°C24 Jan 1955	71 mm16 Jan 1992	330 mm1992 · driest 0 mm in 1999	65
February	35.0°C21 Feb 1997	0.0°C5 Feb 1983	74 mm3 Feb 2010	137 mm2010 · driest 0 mm in 1948	65
March	38.9°C23 Mar 1995	3.9°C3 Mar 1991	57 mm3 Mar 1968	157 mm1968 · driest 0 mm in 1952	67
April	39.4°C16 Apr 1998	5.0°C5 Apr 1961	29 mm16 Apr 1959	79 mm1959 · driest 0 mm in 2009	67
May	40.0°C26 May 2011	6.7°C28 May 1983	54 mm19 May 2001	205 mm1991 · driest 0 mm in 1985	66
June	40.0°C6 Jun 1989	10.0°C1 Jun 1979	76 mm19 Jun 2007	286 mm1985 · driest 0 mm in 1991	64
July	37.8°C17 Jul 1989	7.8°C9 Jul 1999	83 mm27 Jul 1972	288 mm1960 · driest 50 mm in 2007	66
August	35.0°C16 Aug 2009	10.0°C23 Aug 1955	69 mm1 Aug 1993	230 mm1965 · driest 41 mm in 1989	66
September	34.4°C28 Sep 1988	7.2°C28 Sep 1979	47 mm10 Sep 1949	282 mm1955 · driest 14 mm in 1953	65
October	35.6°C25 Oct 1988	5.0°C26 Oct 1999	68 mm9 Oct 1992	125 mm1966 · driest 0 mm in 1985	66
November	36.7°C3 Nov 2005	2.2°C15 Nov 1976	54 mm26 Nov 1982	111 mm1976 · driest 0 mm in 1949	67
December	34.4°C19 Dec 1985	0.6°C17 Dec 1958	44 mm12 Dec 1963	87 mm1963 · driest 0 mm in 1956	65

Typical days per month at ATOYAC, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	27	13	<1
February	27	19	<1
March	31	28	0
April	30	29	0
May	31	30	1
June	30	24	4
July	30	16	5
August	30	14	4
September	28	13	4
October	30	17	2
November	29	17	<1
December	28	10	<1

How often, not how much — every day in ATOYAC’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	96%	5%	2%	3%	26.2–29.7°C
February	97%	3%	<1%	<1%	27.4–31.3°C
March	98%	2%	<1%	<1%	30.1–32.8°C
April	98%	2%	<1%	<1%	31.8–35.3°C
May	91%	10%	3%	10%	32.6–36.1°C
June	62%	38%	16%	54%	29.2–33.7°C
July	51%	49%	17%	70%	26.9–30.0°C
August	56%	44%	14%	63%	26.8–29.7°C
September	63%	37%	11%	47%	26.9–29.6°C
October	84%	16%	6%	14%	27.4–30.3°C
November	97%	4%	<1%	2%	27.3–30.4°C
December	96%	4%	1%	2%	26.4–29.4°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.

1944Each stripe is one year’s mean temperature against the 52-year average. Warmest: 1946. Coolest: 1968.2011

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 3982146
NOAA station: MXN00014018 · ATOYAC
Station distance: 9.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 17 usable years
Daylight: Calculated from latitude 20.09°, mid-month, sunrise to sunset including refraction. Not a station measurement.
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 ATOYAC is what differs

Usmajac→Atoyac→Amacueca→Techaluta de Montenegro→Cuyacapan→El Reparo→

Or put two places side by side: Tehuantepec vs Usmajac

Best time to visitTehuantepec.

October

October

December

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Tehuantepec.

The whole year,
without the guesswork.

Nearby, measured,
and named.