Mexico · 1991–2020

Best time to visit
Cumis (Santa Lucía).

December leads for comfortable weather in Cumis (Santa Lucía): typically 23.7°C by day, 5.9°C at night, with 17 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortDecember

Typical high23.7°C

Typical low5.9°C

Rain in December17 mm

Comfort

December

December · January · February

83climate match

Beach

October

October · November · June

68climate match

Outdoors

December

December · January · February

82climate match

The weakest month is August, scoring 29 against December’s 83 — days average 39.6°C, 16° 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

8224.6° / 6°

Feb

7826.2° / 6.8°

Mar

6829.9° / 8.1°

Apr

6432.3° / 10°

May

5935.9° / 13.7°

Jun

4239.2° / 19.5°

Jul

3139.6° / 25°

Aug

2939.6° / 25.2°

Sep

3738.8° / 23.1°

Oct

6334.8° / 15.8°

Nov

7429.2° / 9.9°

Dec

8323.7° / 5.9°

Monthly climate evidence for Cumis (Santa Lucía) — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 34 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	24.6°C	6°C	5 mm	0.7	17.1°C	10 h 30	82	Good coverage
February	26.2°C	6.8°C	9 mm	0.9	17.4°C	11 h 08	78	Good coverage
March	29.9°C	8.1°C	5 mm	0.5	18.3°C	11 h 55	68	Good coverage
April	32.3°C	10°C	0 mm	0.1	19.9°C	12 h 49	64	Good coverage
May	35.9°C	13.7°C	1 mm	0.1	22.8°C	13 h 34	59	Good coverage
June	39.2°C	19.5°C	3 mm	0.2	26.6°C	13 h 58	42	Good coverage
July	39.6°C	25°C	15 mm	2	29.5°C	13 h 48	31	Good coverage
August	39.6°C	25.2°C	41 mm	3	30.4°C	13 h 10	29	Good coverage
September	38.8°C	23.1°C	33 mm	1.4	30.1°C	12 h 18	37	Good coverage
October	34.8°C	15.8°C	7 mm	0.6	27.0°C	11 h 26	63	Good coverage
November	29.2°C	9.9°C	10 mm	0.7	22.3°C	10 h 41	74	Good coverage
December	23.7°C	5.9°C	17 mm	1.1	18.7°C	10 h 19	83	Good coverage

Records at SAN ISIDRO, 1956–2012
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	37.8°C18 Jan 1986	-6.7°C9 Jan 1971	57 mm19 Jan 1961	80 mm1960 · driest 0 mm in 1998	52
February	37.8°C19 Feb 1981	-5.0°C2 Feb 1985	32 mm6 Feb 1992	96 mm1992 · driest 0 mm in 1979	54
March	40.6°C21 Mar 2004	-1.7°C1 Mar 1971	46 mm2 Mar 1983	66 mm1992 · driest 0 mm in 1966	53
April	43.9°C9 Apr 2000	1.1°C20 Apr 1968	7 mm26 Apr 1985	7 mm1985 · driest 0 mm in 1957	50
May	47.8°C27 May 1958	2.8°C17 May 2008	27 mm29 May 1972	44 mm1972 · driest 0 mm in 1975	50
June	50.6°C22 Jun 1998	8.9°C4 Jun 1965	21 mm24 Jun 2006	38 mm2006 · driest 0 mm in 1973	50
July	50.0°C9 Jul 1998	12.8°C28 Jul 2000	75 mm29 Jul 1963	93 mm1963 · driest 0 mm in 1962	52
August	46.7°C2 Aug 1977	15.0°C19 Aug 2004	102 mm5 Aug 1959	151 mm1959 · driest 0 mm in 1956	52
September	47.8°C13 Sep 1999	10.6°C18 Sep 1974	144 mm22 Sep 1976	175 mm1976 · driest 0 mm in 2009	52
October	45.6°C7 Oct 1998	1.7°C30 Oct 1971	58 mm23 Oct 2006	65 mm2006 · driest 0 mm in 1969	51
November	41.7°C5 Nov 2006	-1.1°C4 Nov 1956	65 mm11 Nov 1994	78 mm1994 · driest 0 mm in 1972	53
December	33.9°C4 Dec 1979	-3.9°C25 Dec 1974	103 mm8 Dec 1988	151 mm1994 · driest 0 mm in 2011	52

Typical days per month at SAN ISIDRO, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	16	4	<1	<1
February	17	6	<1	<1
March	26	17	<1	<1
April	28	22	0	0
May	30	29	0	<1
June	30	30	0	<1
July	30	30	0	<1
August	31	31	0	1
September	30	30	0	<1
October	30	27	0	<1
November	25	17	<1	<1
December	13	2	<1	<1

How often, not how much — every day in SAN ISIDRO’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	84%	4%	<1%	2%	20.7–27.2°C
February	92%	3%	<1%	1%	22.4–28.4°C
March	97%	2%	<1%	<1%	24.4–31.2°C
April	100%	<1%	0%	0%	28.1–34.0°C
May	100%	<1%	<1%	<1%	30.9–37.6°C
June	100%	<1%	<1%	0%	34.8–40.2°C
July	91%	9%	2%	4%	36.5–41.1°C
August	89%	11%	4%	6%	35.9–40.2°C
September	94%	6%	3%	2%	35.1–39.8°C
October	97%	3%	<1%	<1%	31.1–36.3°C
November	96%	2%	<1%	1%	25.9–31.1°C
December	84%	5%	2%	2%	21.3–26.3°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 44-year average. Warmest: 2001. Coolest: 1975.2011

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 8884462
NOAA station: MXN00026082 · SAN ISIDRO
Station distance: 14.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 18 usable years
Daylight: Calculated from latitude 28.72°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 34 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 ISIDRO is what differs

Bahía de Kino→La Providencia→Plan de Ayala→Sahuímero→Cajeme→Santa Margarita→

Or put two places side by side: Cumis (Santa Lucía) vs Bahía de Kino

Best time to visitCumis (Santa Lucía).

December

October

December

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Cumis (Santa Lucía).

The whole year,
without the guesswork.

Nearby, measured,
and named.