Mexico · 1991–2020

Best time to visit
Río Grande.

October leads for comfortable weather in Río Grande: typically 24.9°C by day, 8.2°C at night, with 36 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high24.9°C

Typical low8.2°C

Rain in October36 mm

Comfort

October

October · September · July

84climate match

Beach

June

June · May · July

68climate match

Outdoors

January

January · December · October

82climate match

The weakest month is January, scoring 62 against October’s 84 — nights drop to 0.4°C.

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

6220.5° / 0.4°

Feb

7222.5° / 2.2°

Mar

7426.1° / 4.7°

Apr

6929.1° / 7.4°

May

6931.1° / 11°

Jun

7030.1° / 13.4°

Jul

7627.9° / 13.4°

Aug

7327.6° / 12.9°

Sep

8025.8° / 11.8°

Oct

8424.9° / 8.2°

Nov

7623° / 3.5°

Dec

6521° / 1.4°

Monthly climate evidence for Río Grande — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	20.5°C	0.4°C	14 mm	1.8	10 h 49	62	Good coverage
February	22.5°C	2.2°C	9 mm	1.2	11 h 19	72	Good coverage
March	26.1°C	4.7°C	2 mm	0.5	11 h 57	74	Good coverage
April	29.1°C	7.4°C	4 mm	0.9	12 h 41	69	Good coverage
May	31.1°C	11°C	12 mm	1.8	13 h 17	69	Good coverage
June	30.1°C	13.4°C	61 mm	6.2	13 h 36	70	Good coverage
July	27.9°C	13.4°C	61 mm	7.7	13 h 28	76	Good coverage
August	27.6°C	12.9°C	76 mm	9.3	12 h 58	73	Good coverage
September	25.8°C	11.8°C	64 mm	7.6	12 h 15	80	Good coverage
October	24.9°C	8.2°C	36 mm	3.3	11 h 33	84	Good coverage
November	23°C	3.5°C	11 mm	1.5	10 h 57	76	Good coverage
December	21°C	1.4°C	7 mm	1.4	10 h 40	65	Good coverage

Records at RIO GRANDE (SMN), 1922–2012
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	31.7°C6 Jan 1952	-10.0°C1 Jan 1933	50 mm2 Jan 1948	123 mm1992 · driest 0 mm in 1933	56
February	35.0°C28 Feb 1951	-10.6°C4 Feb 2011	25 mm22 Feb 1953	61 mm2005 · driest 0 mm in 1943	55
March	42.8°C31 Mar 1954	-7.2°C6 Mar 1929	26 mm26 Mar 1925	47 mm1925 · driest 0 mm in 2011	56
April	40.6°C5 Apr 1942	-3.3°C14 Apr 1957	17 mm16 Apr 1994	29 mm1994 · driest 0 mm in 1933	54
May	43.9°C15 May 1942	-2.2°C7 May 1926	40 mm26 May 1930	76 mm1963 · driest 0 mm in 2010	52
June	43.9°C12 Jun 1942	0.0°C2 Jun 1970	65 mm20 Jun 2007	173 mm2000 · driest 0 mm in 1957	54
July	40.6°C30 Jul 1950	1.7°C4 Jul 1963	135 mm19 Jul 1952	178 mm1927 · driest 0 mm in 1956	55
August	40.6°C12 Aug 1942	1.7°C2 Aug 1964	53 mm7 Aug 1998	179 mm1955 · driest 10 mm in 1951	55
September	41.7°C23 Sep 1950	0.0°C30 Sep 1956	70 mm15 Sep 1958	233 mm1928 · driest 0 mm in 1949	57
October	41.7°C24 Oct 1954	-3.3°C31 Oct 1929	90 mm3 Oct 1996	206 mm1959 · driest 0 mm in 1932	56
November	38.9°C18 Nov 1960	-10.0°C28 Nov 2011	43 mm1 Nov 1953	107 mm1923 · driest 0 mm in 1945	56
December	33.9°C17 Dec 1961	-11.1°C12 Dec 1997	25 mm10 Dec 1941	80 mm1925 · driest 0 mm in 1948	55

Typical days per month at RIO GRANDE (SMN), 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	3	0	15	<1
February	10	<1	8	<1
March	23	5	2	0
April	28	15	<1	<1
May	30	25	0	<1
June	28	18	0	2
July	28	9	0	2
August	29	6	0	2
September	22	2	0	2
October	19	2	<1	1
November	11	<1	5	<1
December	5	<1	11	<1

How often, not how much — every day in RIO GRANDE (SMN)’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	74%	4%	1%	4%	18.4–25.3°C
February	84%	4%	<1%	3%	19.7–27.4°C
March	94%	2%	<1%	2%	23.7–30.6°C
April	96%	3%	<1%	1%	27.1–32.9°C
May	94%	6%	2%	4%	29.8–36.0°C
June	82%	18%	6%	21%	28.8–36.4°C
July	75%	24%	7%	27%	26.4–35.2°C
August	74%	26%	7%	33%	26.4–33.6°C
September	77%	23%	9%	24%	25.0–32.6°C
October	88%	10%	4%	6%	24.2–30.8°C
November	88%	5%	2%	4%	22.2–29.3°C
December	81%	4%	1%	3%	19.9–25.8°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.

1923Each stripe is one year’s mean temperature against the 38-year average. Warmest: 1945. Coolest: 1963.2012

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 3988594
NOAA station: MXN00032045 · RIO GRANDE (SMN)
Station distance: 2.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 17 usable years
Daylight: Calculated from latitude 23.83°, 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 RIO GRANDE (SMN) is what differs

Loreto→Las Esperanzas (El Ranchito)→Los Ramírez→Francisco García Salinas→Tetillas→José María Morelos y Pavón→

Or put two places side by side: Río Grande vs Loreto

Best time to visitRío Grande.