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Mexico · 1991–2020

Best time to visit
San Isidro.

April leads for comfortable weather in San Isidro: typically 23.6°C by day, 4.7°C at night, with 17 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortApril

Typical high23.6°C

Typical low4.7°C

Rain in April17 mm

Comfort

April

April · November · May

80climate match

Beach

September

September · October · June

62climate match

Outdoors

November

November · March · April

81climate match

The weakest month is February, scoring 47 against April’s 80 — nights drop to 2.3°C, and days reach only 18°C, 6° below 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

5118.4° / 1.6°

Feb

4718° / 2.3°

Mar

6320.8° / 3.4°

Apr

8023.6° / 4.7°

May

7627° / 7.1°

Jun

6532.1° / 10.2°

Jul

5935.8° / 13.8°

Aug

5836.2° / 14.2°

Sep

6433.4° / 12.1°

Oct

7228.5° / 7.8°

Nov

7723° / 4°

Dec

5317.8° / 0.9°

Monthly climate evidence for San Isidro — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 44 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	18.4°C	1.6°C	67 mm	5.4	15.7°C	10 h 16	51	Good coverage
February	18°C	2.3°C	84 mm	7.1	15.4°C	11 h 00	47	Good coverage
March	20.8°C	3.4°C	58 mm	5.4	15.4°C	11 h 53	63	Good coverage
April	23.6°C	4.7°C	17 mm	2.8	15.8°C	12 h 55	80	Good coverage
May	27°C	7.1°C	12 mm	1.8	16.4°C	13 h 46	76	Good coverage
June	32.1°C	10.2°C	2 mm	0.3	17.3°C	14 h 13	65	Good coverage
July	35.8°C	13.8°C	8 mm	0.9	18.9°C	14 h 03	59	Good coverage
August	36.2°C	14.2°C	12 mm	1.9	19.8°C	13 h 19	58	Good coverage
September	33.4°C	12.1°C	9 mm	0.9	19.8°C	12 h 19	64	Good coverage
October	28.5°C	7.8°C	16 mm	1.5	19.1°C	11 h 20	72	Good coverage
November	23°C	4°C	19 mm	2.6	17.8°C	10 h 29	77	Good coverage
December	17.8°C	0.9°C	35 mm	3.6	16.4°C	10 h 04	53	Good coverage

Records at VALLE DE SAN RAFAEL, 1979–2012
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	31.7°C3 Jan 1997	-7.2°C14 Jan 2007	89 mm20 Jan 2010	236 mm1993 · driest 1 mm in 2009	31
February	32.8°C2 Feb 2009	-5.0°C3 Feb 1999	59 mm18 Feb 2011	191 mm1980 · driest 1 mm in 1984	30
March	36.7°C11 Mar 2007	-6.1°C18 Mar 1988	46 mm13 Mar 1995	146 mm1991 · driest 0 mm in 2009	31
April	43.9°C22 Apr 2009	-6.1°C9 Apr 2001	23 mm17 Apr 1995	65 mm1988 · driest 0 mm in 1996	29
May	45.6°C10 May 2009	-2.2°C11 May 2005	17 mm8 May 1995	26 mm1995 · driest 0 mm in 1994	31
June	48.9°C20 Jun 2008	1.7°C17 Jun 1982	15 mm25 Jun 2000	15 mm2000 · driest 0 mm in 2004	31
July	47.8°C1 Jul 2008	1.7°C15 Jul 1997	38 mm13 Jul 1999	46 mm1999 · driest 0 mm in 2004	31
August	46.7°C2 Aug 2008	5.0°C2 Aug 2001	48 mm16 Aug 1983	100 mm1983 · driest 0 mm in 2006	30
September	46.7°C6 Sep 2008	3.9°C24 Sep 1988	29 mm1 Sep 1995	50 mm1995 · driest 0 mm in 1980	30
October	45.0°C1 Oct 2001	-2.2°C28 Oct 1996	64 mm20 Oct 2004	117 mm2004 · driest 0 mm in 2006	31
November	38.9°C1 Nov 2008	-4.4°C18 Nov 1998	41 mm30 Nov 2007	90 mm1982 · driest 0 mm in 1995	29
December	31.1°C4 Dec 1979	-7.2°C9 Dec 1992	45 mm8 Dec 1997	100 mm1992 · driest 0 mm in 2005	26

Typical days per month at VALLE DE SAN RAFAEL, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	2	<1	7	2
February	2	<1	5	2
March	7	2	2	2
April	11	3	1	<1
May	16	8	<1	<1
June	21	17	0	0
July	22	21	0	<1
August	23	22	0	<1
September	21	18	0	<1
October	18	11	<1	<1
November	10	4	4	<1
December	2	0	9	<1

How often, not how much — every day in VALLE DE SAN RAFAEL’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	42%	16%	6%	9%	16.3–21.9°C
February	41%	22%	9%	21%	15.7–21.0°C
March	51%	17%	7%	12%	16.5–25.1°C
April	71%	10%	2%	10%	19.7–26.6°C
May	89%	5%	<1%	4%	21.9–29.0°C
June	98%	<1%	<1%	0%	28.4–34.1°C
July	97%	4%	<1%	<1%	32.4–37.5°C
August	94%	6%	2%	5%	33.1–38.1°C
September	95%	4%	1%	<1%	27.8–35.3°C
October	90%	5%	1%	3%	24.0–32.0°C
November	69%	10%	3%	9%	18.4–25.6°C
December	40%	13%	4%	12%	14.4–21.2°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.

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 8893758
NOAA station: MXN00002118 · VALLE DE SAN RAFAEL
Station distance: 5.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 15 usable years
Daylight: Calculated from latitude 31.90°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 44 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 VALLE DE SAN RAFAEL is what differs

Fraccionamiento del Valle→Los Pirules→La Huerta→La Juanita→El Barril (La Roca) [Centro de Rehabilitación]→Belmonte→

Or put two places side by side: San Isidro vs Fraccionamiento del Valle

Best time to visitSan Isidro.