Mexico · 1991–2020

Best time to visit
16 de Septiembre.

February leads for comfortable weather in 16 de Septiembre: typically 24.1°C by day, 6.3°C at night, with 19 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortFebruary

Typical high24.1°C

Typical low6.3°C

Rain in February19 mm

Comfort

February

February · November · January

84climate match

Beach

September

September · October · April

72climate match

Outdoors

December

December · January · February

87climate match

The weakest month is July, scoring 24 against February’s 84 — days average 40.6°C, 17° 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

7722.3° / 5.1°

Feb

8424.1° / 6.3°

Mar

7727.6° / 8.9°

Apr

6931.5° / 11.5°

May

5836.3° / 15.9°

Jun

3340.9° / 21°

Jul

2440.6° / 24.6°

Aug

2439.8° / 24.2°

Sep

4238° / 21.3°

Oct

6933.2° / 14.7°

Nov

7827.2° / 8.8°

Dec

7321.3° / 4.9°

Monthly climate evidence for 16 de Septiembre — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	22.3°C	5.1°C	16 mm	1.8	10 h 21	77	Strong coverage
February	24.1°C	6.3°C	19 mm	1.8	11 h 03	84	Strong coverage
March	27.6°C	8.9°C	14 mm	1.8	11 h 54	77	Strong coverage
April	31.5°C	11.5°C	6 mm	0.6	12 h 53	69	Strong coverage
May	36.3°C	15.9°C	1 mm	0.1	13 h 41	58	Strong coverage
June	40.9°C	21°C	5 mm	0.7	14 h 07	33	Strong coverage
July	40.6°C	24.6°C	51 mm	4.4	13 h 57	24	Strong coverage
August	39.8°C	24.2°C	73 mm	5.9	13 h 15	24	Strong coverage
September	38°C	21.3°C	35 mm	3.3	12 h 19	42	Strong coverage
October	33.2°C	14.7°C	10 mm	1.1	11 h 22	69	Good coverage
November	27.2°C	8.8°C	7 mm	1	10 h 34	78	Strong coverage
December	21.3°C	4.9°C	19 mm	1.7	10 h 10	73	Good coverage

What has changed

16 de Septiembre runs +1.4°C
on the 1961–1990 baseline.

Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.

Jan

+2.0

Feb

+1.0

Mar

+3.1

Apr

+1.8

May

+0.9

Jun

—

Jul

+0.4

Aug

+1.3

Sep

+0.4

Oct

+1.5

Nov

+1.8

Dec

—

February daytime highs, 2011–2022. Last recorded: 23.3°C.

Records at ALTAR (OBS), 1949–2025
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	33.0°C30 Jan 2018	-10.0°C12 Jan 1962	51 mm18 Jan 1993	133 mm1993 · driest 0 mm in 2018	57
February	35.6°C4 Feb 1963	-7.2°C28 Feb 1962	62 mm14 Feb 2003	87 mm1966 · driest 0 mm in 2022	60
March	38.3°C20 Mar 2004	-6.1°C1 Mar 1962	41 mm12 Mar 1973	72 mm1983 · driest 0 mm in 1972	62
April	42.8°C21 Apr 1965	-1.7°C5 Apr 1983	23 mm2 Apr 2004	47 mm2004 · driest 0 mm in 1974	62
May	46.1°C27 May 1984	1.7°C17 May 1962	58 mm14 May 1987	69 mm1987 · driest 0 mm in 1990	62
June	48.8°C20 Jun 2016	3.9°C16 Jun 1962	35 mm24 Jun 2008	80 mm1984 · driest 0 mm in 2010	60
July	47.8°C27 Jul 1980	10.0°C14 Jul 1962	101 mm31 Jul 1971	201 mm1971 · driest 1 mm in 1993	62
August	46.8°C21 Aug 2019	11.7°C31 Aug 1962	85 mm27 Aug 1999	212 mm1971 · driest 0 mm in 1962	60
September	45.6°C3 Sep 1983	6.7°C30 Sep 1962	59 mm18 Sep 2014	110 mm2014 · driest 0 mm in 1972	60
October	45.0°C4 Oct 1964	0.0°C28 Oct 1970	112 mm1 Oct 1983	195 mm1983 · driest 0 mm in 1980	57
November	40.6°C6 Nov 1964	-4.4°C21 Nov 1979	26 mm12 Nov 2003	53 mm1978 · driest 0 mm in 2002	61
December	38.3°C1 Dec 1964	-8.3°C24 Dec 1974	60 mm14 Dec 1967	156 mm1965 · driest 0 mm in 1974	56

Typical days per month at ALTAR (OBS), 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	8	<1	2	<1
February	11	2	<1	<1
March	19	10	<1	<1
April	22	17	0	<1
May	26	25	0	0
June	27	27	0	<1
July	27	27	0	1
August	28	28	0	2
September	27	27	0	1
October	26	22	0	<1
November	16	8	<1	<1
December	6	<1	2	<1

How often, not how much — every day in ALTAR (OBS)’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	67%	7%	2%	5%	19.1–24.2°C
February	81%	7%	2%	5%	21.2–26.8°C
March	89%	6%	1%	3%	24.1–30.2°C
April	97%	2%	<1%	<1%	28.6–33.1°C
May	99%	<1%	<1%	0%	33.4–38.0°C
June	97%	3%	<1%	<1%	38.8–42.2°C
July	82%	18%	6%	15%	38.5–42.1°C
August	82%	18%	8%	16%	37.6–41.1°C
September	90%	11%	4%	5%	36.0–39.7°C
October	95%	5%	2%	2%	30.5–35.9°C
November	89%	4%	1%	<1%	24.0–29.6°C
December	64%	8%	3%	6%	18.5–25.1°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.

1961Each stripe is one year’s mean temperature against the 31-year average. Warmest: 2017. Coolest: 1961.2017

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 8867753
NOAA station: MXM00076113 · ALTAR (OBS)
Station distance: 8.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 23 usable years
Daylight: Calculated from latitude 30.70°, 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 ALTAR (OBS) is what differs

Altar→Átil→Llano Blanco (Rancho Seco)→Oquitoa→Santa Matilde→Los Verdes→

Or put two places side by side: 16 de Septiembre vs Altar

Best time to visit16 de Septiembre.