Mexico · 1991–2020

Best time to visit
San Jerónimo.

January leads for comfortable weather in San Jerónimo: typically 36.6°C by day, 17.9°C at night, with 12 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJanuary

Typical high36.6°C

Typical low17.9°C

Rain in January12 mm

Comfort

January

January · December · November

53climate match

Beach

November

November · January · February

71climate match

Outdoors

January

January · December · November

35climate match

The weakest month is June, scoring 17 against January’s 53 — days average 38.9°C, 15° 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

5336.6° / 17.9°

Feb

4638° / 19.5°

Mar

3639.9° / 21.3°

Apr

2741.7° / 23.1°

May

2441.9° / 24.5°

Jun

1738.9° / 23.3°

Jul

2336° / 21.9°

Aug

2535.9° / 21.7°

Sep

2935.7° / 21.7°

Oct

4137° / 21.3°

Nov

4837.3° / 19.6°

Dec

5336.5° / 18°

Monthly climate evidence for San Jerónimo — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	36.6°C	17.9°C	12 mm	0.9	11 h 08	53	Good coverage
February	38°C	19.5°C	12 mm	0.3	11 h 31	46	Good coverage
March	39.9°C	21.3°C	3 mm	0.2	11 h 59	36	Good coverage
April	41.7°C	23.1°C	0 mm	0.1	12 h 32	27	Good coverage
May	41.9°C	24.5°C	16 mm	1.5	13 h	24	Good coverage
June	38.9°C	23.3°C	130 mm	9.5	13 h 14	17	Good coverage
July	36°C	21.9°C	156 mm	11.2	13 h 08	23	Good coverage
August	35.9°C	21.7°C	147 mm	11.7	12 h 45	25	Good coverage
September	35.7°C	21.7°C	132 mm	9.9	12 h 13	29	Good coverage
October	37°C	21.3°C	62 mm	4.6	11 h 41	41	Good coverage
November	37.3°C	19.6°C	15 mm	1.1	11 h 14	48	Good coverage
December	36.5°C	18°C	1 mm	0.1	11 h 01	53	Good coverage

Records at ARATICHANGUIO, 1955–2013
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	41.7°C2 Jan 2011	8.9°C5 Jan 1956	65 mm24 Jan 1980	195 mm1992 · driest 0 mm in 2003	57
February	42.8°C28 Feb 2012	10.0°C19 Feb 1968	85 mm2 Feb 2010	222 mm2010 · driest 0 mm in 1967	57
March	45.0°C27 Mar 2013	11.7°C1 Mar 1960	38 mm4 Mar 1988	46 mm1988 · driest 0 mm in 1957	58
April	46.1°C24 Apr 1981	16.7°C1 Apr 2001	13 mm2 Apr 1966	19 mm1966 · driest 0 mm in 1988	58
May	45.6°C11 May 2010	18.9°C28 May 1995	60 mm29 May 1975	181 mm1956 · driest 0 mm in 1957	58
June	45.6°C5 Jun 1969	15.0°C4 Jun 1993	75 mm20 Jun 1959	294 mm1959 · driest 9 mm in 1962	58
July	42.8°C17 Jul 1973	16.7°C7 Jul 1993	95 mm9 Jul 1956	357 mm1955 · driest 67 mm in 1997	59
August	42.8°C22 Aug 1973	17.8°C29 Aug 1994	110 mm24 Aug 1969	341 mm2010 · driest 45 mm in 1990	58
September	40.6°C6 Sep 1990	16.7°C10 Sep 1994	102 mm26 Sep 1967	238 mm1992 · driest 43 mm in 1997	56
October	43.9°C31 Oct 2010	12.8°C25 Oct 1999	71 mm7 Oct 1976	242 mm1955 · driest 0 mm in 1984	55
November	42.8°C21 Nov 2012	10.0°C24 Nov 2002	40 mm6 Nov 2006	89 mm2002 · driest 0 mm in 2001	56
December	41.7°C16 Dec 2012	8.9°C30 Dec 1955	19 mm26 Dec 1958	42 mm1958 · driest 0 mm in 1956	56

Typical days per month at ARATICHANGUIO, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	31	30	<1
February	28	28	<1
March	31	31	<1
April	30	30	0
May	31	31	<1
June	30	30	4
July	31	31	6
August	31	31	5
September	30	30	5
October	31	31	2
November	30	30	<1
December	31	30	<1

How often, not how much — every day in ARATICHANGUIO’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	98%	3%	2%	3%	33.9–37.5°C
February	99%	1%	<1%	<1%	35.3–39.0°C
March	100%	<1%	<1%	0%	37.9–40.9°C
April	100%	<1%	<1%	0%	39.7–42.5°C
May	95%	5%	2%	5%	39.8–42.6°C
June	69%	31%	15%	43%	36.5–40.1°C
July	61%	39%	20%	55%	34.0–36.9°C
August	63%	37%	16%	52%	33.9–36.7°C
September	68%	32%	14%	36%	33.6–36.8°C
October	86%	14%	7%	10%	34.5–38.0°C
November	97%	3%	1%	<1%	35.4–38.5°C
December	99%	1%	<1%	<1%	34.6–36.9°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.

1957Each stripe is one year’s mean temperature against the 49-year average. Warmest: 2011. Coolest: 1992.2012

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 3986595
NOAA station: MXN00012007 · ARATICHANGUIO
Station distance: 7.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 21 usable years
Daylight: Calculated from latitude 18.53°, 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 ARATICHANGUIO is what differs

Aratichanguío→El Timbiriche→La Quetzería (La Quesería)→Buenavista Tres→El Cuirindal→La Ordeña→

Or put two places side by side: San Jerónimo vs Aratichanguío

Best time to visitSan Jerónimo.

January

November

January

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
San Jerónimo.

The whole year,
without the guesswork.

Nearby, measured,
and named.