Mexico · 1991–2020

Best time to visit
San Ignacio Río Muerto.

December leads for comfortable weather in San Ignacio Río Muerto: typically 24.6°C by day, 7.7°C at night, with 14 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortDecember

Typical high24.6°C

Typical low7.7°C

Rain in December14 mm

Comfort

December

December · January · February

85climate match

Beach

October

October · November · June

76climate match

Outdoors

December

December · January · February

82climate match

The weakest month is August, scoring 30 against December’s 85 — days average 38.2°C, 14° 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

8424.4° / 6.9°

Feb

8026.3° / 7.8°

Mar

7129.3° / 8.7°

Apr

6731.9° / 11°

May

6135.5° / 14.2°

Jun

4537.9° / 20.3°

Jul

3638.3° / 23.9°

Aug

3038.2° / 24.1°

Sep

3737.2° / 22.8°

Oct

6034.4° / 18.3°

Nov

7529.7° / 11.6°

Dec

8524.6° / 7.7°

Monthly climate evidence for San Ignacio Río Muerto — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 35 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	24.4°C	6.9°C	11 mm	1.1	18.8°C	10 h 35	84	Good coverage
February	26.3°C	7.8°C	12 mm	1.2	18.7°C	11 h 11	80	Good coverage
March	29.3°C	8.7°C	2 mm	0.3	19.3°C	11 h 55	71	Good coverage
April	31.9°C	11°C	1 mm	0.1	21.0°C	12 h 47	67	Good coverage
May	35.5°C	14.2°C	0 mm	0	24.0°C	13 h 29	61	Good coverage
June	37.9°C	20.3°C	2 mm	0.4	27.0°C	13 h 52	45	Good coverage
July	38.3°C	23.9°C	36 mm	3.7	29.2°C	13 h 43	36	Good coverage
August	38.2°C	24.1°C	68 mm	4.8	30.2°C	13 h 07	30	Good coverage
September	37.2°C	22.8°C	73 mm	3.1	30.0°C	12 h 17	37	Good coverage
October	34.4°C	18.3°C	31 mm	1.3	28.3°C	11 h 28	60	Good coverage
November	29.7°C	11.6°C	9 mm	1	24.3°C	10 h 45	75	Good coverage
December	24.6°C	7.7°C	14 mm	1.2	20.8°C	10 h 25	85	Good coverage

Records at SAN IGNACIO RIO MUERTO 4-P-12, 1987–2011
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	33.9°C5 Jan 2008	0.6°C5 Jan 2000	35 mm3 Jan 2005	69 mm1992 · driest 0 mm in 2006	23
February	38.9°C28 Feb 2009	-2.2°C4 Feb 2011	60 mm2 Feb 1992	107 mm1992 · driest 0 mm in 1997	24
March	38.9°C28 Mar 1997	2.8°C8 Mar 1998	17 mm3 Mar 2004	17 mm2004 · driest 0 mm in 1989	23
April	41.7°C28 Apr 2008	5.0°C1 Apr 1998	7 mm1 Apr 2003	7 mm2003 · driest 0 mm in 1993	23
May	45.0°C29 May 2007	7.8°C13 May 1999	1 mm22 May 1995	1 mm1995 · driest 0 mm in 2004	22
June	45.6°C24 Jun 1988	10.6°C7 Jun 1999	25 mm14 Jun 1997	25 mm1997 · driest 0 mm in 2011	22
July	45.6°C15 Jul 2007	16.7°C8 Jul 1995	55 mm22 Jul 2009	195 mm1990 · driest 3 mm in 1994	24
August	45.0°C16 Aug 1988	17.8°C15 Aug 1995	75 mm26 Aug 1991	201 mm2008 · driest 11 mm in 2007	24
September	46.7°C2 Sep 2007	15.6°C26 Sep 1993	172 mm5 Sep 2007	267 mm1991 · driest 0 mm in 2005	25
October	45.6°C5 Oct 1999	8.9°C26 Oct 2010	199 mm12 Oct 2009	388 mm2009 · driest 0 mm in 2003	24
November	40.0°C2 Nov 2008	1.7°C30 Nov 2010	25 mm12 Nov 1994	41 mm2011 · driest 0 mm in 1988	24
December	36.7°C11 Dec 2004	-0.6°C30 Dec 2003	57 mm5 Dec 1994	110 mm1994 · driest 0 mm in 1998	25

Typical days per month at SAN IGNACIO RIO MUERTO 4-P-12, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	16	2	<1
February	20	5	<1
March	29	15	<1
April	29	25	0
May	31	30	0
June	30	30	<1
July	31	31	1
August	31	31	2
September	30	30	2
October	31	29	<1
November	27	17	<1
December	17	2	<1

How often, not how much — every day in SAN IGNACIO RIO MUERTO 4-P-12’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	93%	4%	1%	1%	22.3–28.2°C
February	94%	5%	1%	2%	24.4–29.1°C
March	99%	1%	<1%	0%	27.7–31.2°C
April	99%	<1%	0%	0%	30.2–33.7°C
May	100%	0%	0%	0%	32.9–37.7°C
June	99%	1%	<1%	<1%	35.2–39.8°C
July	87%	13%	5%	9%	35.7–39.8°C
August	84%	16%	7%	14%	36.3–39.9°C
September	89%	11%	6%	8%	35.6–38.8°C
October	96%	4%	2%	1%	32.9–37.0°C
November	96%	4%	1%	0%	26.7–32.2°C
December	90%	5%	2%	3%	23.1–26.6°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.

1988Each stripe is one year’s mean temperature against the 20-year average. Warmest: 1988. Coolest: 2011.2011

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 3970558
NOAA station: MXN00026293 · SAN IGNACIO RIO MUERTO 4-P-12
Station distance: 2.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 20 usable years
Daylight: Calculated from latitude 27.42°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 35 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 SAN IGNACIO RIO MUERTO 4-P-12 is what differs

Atotonilco→Tetabiate→El Castillo→Independencia→Singapur→Pueblo Nuevo→

Or put two places side by side: San Ignacio Río Muerto vs Atotonilco

Best time to visitSan Ignacio Río Muerto.

December

October

December

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
San Ignacio Río Muerto.

The whole year,
without the guesswork.

Nearby, measured,
and named.