Mexico · 1991–2020

Best time to visit
San Isidro.

April leads for comfortable weather in San Isidro: typically 21.1°C by day, 5.2°C at night, with 51 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortApril

Typical high21.1°C

Typical low5.2°C

Rain in April51 mm

Comfort

April

April · March · February

69climate match

Beach

April

April · March · January

27climate match

Outdoors

March

March · April · January

89climate match

The weakest month is June, scoring 33 against April’s 69 — 255 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

5818.3° / 3.2°

Feb

5919.1° / 3.1°

Mar

6620° / 3.6°

Apr

6921.1° / 5.2°

May

5420.9° / 7°

Jun

3320.3° / 8.2°

Jul

5120.3° / 7.6°

Aug

4520.4° / 7.8°

Sep

3820.3° / 8°

Oct

4719° / 6.4°

Nov

5418.1° / 4.6°

Dec

5818.4° / 3.4°

Monthly climate evidence for San Isidro — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	18.3°C	3.2°C	37 mm	4.6	11 h 14	58	Good coverage
February	19.1°C	3.1°C	47 mm	5	11 h 34	59	Good coverage
March	20°C	3.6°C	27 mm	3.2	12 h	66	Good coverage
April	21.1°C	5.2°C	51 mm	5.2	12 h 30	69	Good coverage
May	20.9°C	7°C	141 mm	9.9	12 h 54	54	Good coverage
June	20.3°C	8.2°C	255 mm	16.1	13 h 07	33	Good coverage
July	20.3°C	7.6°C	142 mm	12.2	13 h 02	51	Good coverage
August	20.4°C	7.8°C	185 mm	12.7	12 h 41	45	Good coverage
September	20.3°C	8°C	221 mm	15.7	12 h 13	38	Good coverage
October	19°C	6.4°C	131 mm	11.6	11 h 44	47	Good coverage
November	18.1°C	4.6°C	68 mm	6.9	11 h 20	54	Good coverage
December	18.4°C	3.4°C	48 mm	4.3	11 h 08	58	Good coverage

Records at SAN JUAN CHAMULA, 1961–2013
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	30.0°C31 Jan 2008	-5.6°C17 Jan 1967	72 mm9 Jan 2007	112 mm2007 · driest 0 mm in 2000	40
February	27.8°C15 Feb 1978	-5.0°C2 Feb 1988	50 mm7 Feb 1962	171 mm2002 · driest 2 mm in 1984	40
March	30.0°C18 Mar 2001	-5.0°C27 Mar 2000	48 mm10 Mar 1962	87 mm1962 · driest 0 mm in 1992	39
April	30.0°C16 Apr 1965	-4.4°C23 Apr 2012	55 mm14 Apr 2008	104 mm1962 · driest 0 mm in 1983	39
May	30.0°C5 May 2007	-2.2°C4 May 2003	59 mm14 May 2012	346 mm2000 · driest 17 mm in 2003	41
June	28.3°C4 Jun 1965	0.0°C5 Jun 2002	103 mm27 Jun 2010	684 mm2000 · driest 0 mm in 2004	42
July	28.9°C8 Jul 1999	0.0°C27 Jul 1964	60 mm3 Jul 1987	344 mm2011 · driest 20 mm in 1967	41
August	27.8°C27 Aug 1965	0.6°C24 Aug 1965	93 mm20 Aug 1973	544 mm1973 · driest 0 mm in 2004	41
September	27.8°C10 Sep 1999	0.0°C8 Sep 1964	118 mm25 Sep 2010	471 mm1989 · driest 0 mm in 2004	42
October	28.9°C20 Oct 1999	-3.9°C22 Oct 2011	89 mm28 Oct 2007	399 mm2007 · driest 17 mm in 2010	41
November	29.4°C2 Nov 1973	-5.0°C24 Nov 1981	59 mm28 Nov 2003	210 mm2003 · driest 5 mm in 1983	44
December	30.0°C29 Dec 1967	-7.2°C9 Dec 2012	60 mm20 Dec 2001	187 mm1999 · driest 0 mm in 1990	43

Typical days per month at SAN JUAN CHAMULA, 1991–2020
Month	Days 25°C+	Frost nights	Heavy rain (10 mm+)
January	1	5	2
February	2	4	2
March	3	4	<1
April	4	<1	1
May	3	<1	5
June	2	<1	9
July	1	0	5
August	2	0	7
September	1	0	9
October	1	1	4
November	<1	4	2
December	1	6	1

How often, not how much — every day in SAN JUAN CHAMULA’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	47%	16%	5%	15%	16.6–21.4°C
February	56%	13%	4%	9%	17.6–22.0°C
March	67%	11%	3%	6%	18.6–23.7°C
April	71%	16%	5%	15%	19.7–24.3°C
May	59%	29%	13%	40%	19.5–23.3°C
June	33%	57%	28%	76%	18.9–22.4°C
July	47%	41%	16%	53%	19.2–21.8°C
August	45%	44%	20%	63%	19.3–22.0°C
September	32%	57%	27%	78%	18.9–22.7°C
October	38%	40%	15%	48%	16.9–21.8°C
November	47%	23%	6%	22%	16.0–21.6°C
December	48%	14%	3%	13%	16.5–21.7°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.

1962Each stripe is one year’s mean temperature against the 31-year average. Warmest: 1983. Coolest: 2012.2012

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 8893813
NOAA station: MXN00007030 · SAN JUAN CHAMULA
Station distance: 9.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 15 usable years
Daylight: Calculated from latitude 16.70°, 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 SAN JUAN CHAMULA is what differs

Zinacantán→Yutniotic→Elambó→Jocotal→San Martín→La Frontera→

Or put two places side by side: San Isidro vs Zinacantán

Best time to visitSan Isidro.

April

April

March

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
San Isidro.

The whole year,
without the guesswork.

Nearby, measured,
and named.