Mexico · 1991–2020

Best time to visit
San Marcos.

October leads for comfortable weather in San Marcos: typically 25.4°C by day, 8.6°C at night, with 33 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high25.4°C

Typical low8.6°C

Rain in October33 mm

Comfort

October

October · November · September

84climate match

Beach

June

June · May · April

68climate match

Outdoors

October

October · January · December

81climate match

The weakest month is January, scoring 70 against October’s 84 — nights drop to 1.8°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

7022° / 1.8°

Feb

7823.7° / 3.4°

Mar

7426.7° / 5.5°

Apr

7228.8° / 8.1°

May

7130.7° / 11.1°

Jun

7129.7° / 13.3°

Jul

7227.2° / 13°

Aug

7727.2° / 12.5°

Sep

8026.1° / 11.8°

Oct

8425.4° / 8.6°

Nov

8124.1° / 4.5°

Dec

7222.6° / 2.3°

Monthly climate evidence for San Marcos — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	22°C	1.8°C	17 mm	1.7	10 h 54	70	Good coverage
February	23.7°C	3.4°C	15 mm	1.4	11 h 23	78	Good coverage
March	26.7°C	5.5°C	3 mm	0.4	11 h 58	74	Good coverage
April	28.8°C	8.1°C	6 mm	1.1	12 h 38	72	Good coverage
May	30.7°C	11.1°C	24 mm	2.9	13 h 12	71	Good coverage
June	29.7°C	13.3°C	66 mm	5.5	13 h 29	71	Good coverage
July	27.2°C	13°C	103 mm	7.9	13 h 22	72	Good coverage
August	27.2°C	12.5°C	68 mm	6.5	12 h 54	77	Good coverage
September	26.1°C	11.8°C	65 mm	6.4	12 h 15	80	Good coverage
October	25.4°C	8.6°C	33 mm	3.1	11 h 36	84	Good coverage
November	24.1°C	4.5°C	6 mm	0.7	11 h 03	81	Good coverage
December	22.6°C	2.3°C	6 mm	1.3	10 h 47	72	Good coverage

Records at LORETO, 1963–2012
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	29.4°C19 Jan 1983	-8.3°C14 Jan 1996	43 mm12 Jan 1967	160 mm1992 · driest 0 mm in 1999	42
February	32.2°C28 Feb 2009	-6.1°C9 Feb 1967	37 mm2 Feb 2010	110 mm2010 · driest 0 mm in 2000	41
March	34.4°C31 Mar 1982	-5.0°C11 Mar 1996	42 mm3 Mar 1968	93 mm1968 · driest 0 mm in 1990	44
April	37.2°C30 Apr 1983	0.0°C9 Apr 1996	22 mm23 Apr 1996	44 mm1965 · driest 0 mm in 2010	43
May	38.9°C27 May 1966	2.8°C10 May 1968	58 mm25 May 1994	79 mm2000 · driest 0 mm in 1991	43
June	36.7°C3 Jun 2011	5.0°C9 Jun 1996	71 mm13 Jun 1994	221 mm2007 · driest 0 mm in 1982	42
July	35.0°C6 Jul 1964	5.0°C2 Jul 1996	90 mm15 Jul 1975	336 mm1991 · driest 17 mm in 1977	43
August	33.9°C17 Aug 1981	6.7°C20 Aug 1996	70 mm13 Aug 1970	278 mm2008 · driest 0 mm in 1969	42
September	35.0°C1 Sep 2007	5.0°C30 Sep 1969	85 mm14 Sep 1974	140 mm1973 · driest 0 mm in 1969	43
October	32.8°C1 Oct 1992	-1.7°C31 Oct 2007	68 mm5 Oct 1989	150 mm2006 · driest 0 mm in 2010	43
November	31.7°C12 Nov 1969	-8.9°C29 Nov 2011	35 mm13 Nov 1992	69 mm1976 · driest 0 mm in 1963	44
December	30.6°C15 Dec 1967	-7.8°C14 Dec 1997	41 mm2 Dec 1979	81 mm1963 · driest 0 mm in 2008	42

Typical days per month at LORETO, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	6	0	11	<1
February	12	<1	4	<1
March	24	6	1	<1
April	27	15	<1	<1
May	30	23	0	<1
June	28	17	0	2
July	27	6	0	3
August	27	5	0	2
September	22	3	0	2
October	21	3	<1	1
November	14	<1	4	<1
December	8	0	9	<1

How often, not how much — every day in LORETO’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	82%	6%	2%	5%	19.9–24.0°C
February	89%	5%	1%	3%	22.0–26.0°C
March	97%	2%	<1%	1%	25.0–28.9°C
April	96%	4%	<1%	2%	27.4–31.6°C
May	92%	8%	2%	8%	28.3–32.4°C
June	81%	19%	7%	24%	27.2–31.8°C
July	75%	25%	11%	24%	25.5–29.3°C
August	76%	24%	9%	28%	25.5–29.3°C
September	79%	20%	7%	21%	24.4–28.1°C
October	88%	10%	4%	6%	24.1–27.7°C
November	93%	3%	<1%	2%	23.3–26.1°C
December	85%	5%	2%	3%	21.0–24.4°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.

1964Each stripe is one year’s mean temperature against the 35-year average. Warmest: 1991. Coolest: 1996.2012

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 3985570
NOAA station: MXN00032033 · LORETO
Station distance: 4.5 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 16 usable years
Daylight: Calculated from latitude 22.28°, 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 LORETO is what differs

Loreto→Guadalupe de Atlas→Crisóstomos→Ejido Hidalgo→Colonia Hidalgo (El Tecolote)→Noria del Borrego (Norias)→

Or put two places side by side: San Marcos vs Loreto

Best time to visitSan Marcos.

October

June

October

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
San Marcos.

The whole year,
without the guesswork.

Nearby, measured,
and named.