United States · 1991–2020

Best time to visit
Rio Hondo.

February leads for comfortable weather in Rio Hondo: typically 24.3°C by day, 12.2°C at night, with 18 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortFebruary

Typical high24.3°C

Typical low12.2°C

Rain in February18 mm

Comfort

February

February · March · November

94climate match

Beach

April

April · May · October

89climate match

Outdoors

January

January · December · February

93climate match

The weakest month is September, scoring 36 against February’s 94 — days average 33.4°C, 9° 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

8522.3° / 10°

Feb

9424.3° / 12.2°

Mar

8827.2° / 15.4°

Apr

7330.3° / 18.6°

May

5533° / 21.8°

Jun

4335° / 23.8°

Jul

4035.5° / 24.2°

Aug

4136.3° / 24.2°

Sep

3633.4° / 22.7°

Oct

6430.8° / 18.7°

Nov

8826.4° / 14.2°

Dec

8722.8° / 10.5°

Monthly climate evidence for Rio Hondo — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	22.3°C	10°C	26 mm	3.3	10 h 39	85	Good coverage
February	24.3°C	12.2°C	18 mm	2.7	11 h 14	94	Good coverage
March	27.2°C	15.4°C	34 mm	3.3	11 h 56	88	Good coverage
April	30.3°C	18.6°C	29 mm	2.7	12 h 45	73	Good coverage
May	33°C	21.8°C	53 mm	3.4	13 h 25	55	Good coverage
June	35°C	23.8°C	61 mm	4.1	13 h 46	43	Good coverage
July	35.5°C	24.2°C	63 mm	4.4	13 h 38	40	Good coverage
August	36.3°C	24.2°C	45 mm	3.5	13 h 04	41	Good coverage
September	33.4°C	22.7°C	138 mm	8.6	12 h 17	36	Good coverage
October	30.8°C	18.7°C	71 mm	4.9	11 h 30	64	Good coverage
November	26.4°C	14.2°C	47 mm	4.1	10 h 49	88	Good coverage
December	22.8°C	10.5°C	31 mm	3.9	10 h 30	87	Good coverage

Records at HARLINGEN RIO GRANDE VLY INTL, 1952–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	34.4°C24 Jan 2002	-8.3°C12 Jan 1962	52 mm27 Jan 2018	109 mm1958 · driest 0 mm in 1956	40
February	35.6°C23 Feb 2023	-5.5°C15 Feb 2021	68 mm20 Feb 1958	177 mm1958 · driest 0 mm in 2016	40
March	38.3°C27 Mar 2009	1.1°C5 Mar 2007	350 mm27 Mar 2025	390 mm2025 · driest 0 mm in 1961	40
April	41.1°C6 Apr 2022	5.0°C8 Apr 2007	114 mm5 Apr 1961	141 mm1961 · driest 0 mm in 2011	40
May	41.7°C9 May 2024	10.0°C3 May 2004	171 mm25 May 2007	281 mm2007 · driest 0 mm in 2011	40
June	41.1°C26 Jun 2012	15.6°C2 Jun 1997	160 mm24 Jun 2019	273 mm2018 · driest 0 mm in 1998	39
July	41.1°C24 Jul 2018	20.0°C25 Jul 2019	270 mm26 Jul 2020	311 mm2020 · driest 0 mm in 2004	40
August	41.1°C28 Aug 2011	20.0°C29 Aug 2015	169 mm12 Aug 1960	288 mm1953 · driest 0 mm in 2011	39
September	41.7°C5 Sep 2000	11.7°C27 Sep 2000	159 mm12 Sep 2018	324 mm2018 · driest 5 mm in 1959	39
October	38.3°C18 Oct 2012	3.9°C30 Oct 2025	155 mm1 Oct 2021	267 mm1958 · driest 0 mm in 2010	39
November	34.4°C1 Nov 1997	-0.5°C14 Nov 2018	121 mm22 Nov 2013	187 mm2013 · driest 1 mm in 2010	39
December	32.2°C14 Dec 2019	-2.7°C23 Dec 2022	70 mm6 Dec 2024	128 mm2024 · driest 0 mm in 2010	39

Typical days per month at HARLINGEN RIO GRANDE VLY INTL, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	13	1	<1	<1
February	16	4	<1	<1
March	24	9	0	<1
April	28	19	0	<1
May	31	27	0	1
June	30	29	0	1
July	31	30	0	1
August	31	30	0	1
September	30	27	0	4
October	29	22	0	2
November	21	8	0	1
December	14	2	<1	<1

How often, not how much — every day in HARLINGEN RIO GRANDE VLY INTL’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	66%	12%	2%	8%	18.9–24.8°C
February	75%	10%	2%	7%	20.9–27.3°C
March	85%	10%	3%	5%	24.1–29.4°C
April	90%	10%	3%	5%	27.9–32.0°C
May	89%	11%	5%	9%	30.4–34.4°C
June	85%	15%	6%	16%	32.9–35.8°C
July	86%	14%	5%	9%	33.3–37.0°C
August	88%	12%	4%	13%	33.8–37.2°C
September	74%	26%	11%	30%	31.7–35.1°C
October	83%	16%	6%	13%	28.4–32.3°C
November	78%	15%	5%	11%	23.0–28.4°C
December	68%	12%	2%	10%	20.0–25.4°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.

1953Each stripe is one year’s mean temperature against the 38-year average. Warmest: 2012. Coolest: 1960.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4722843
NOAA station: USW00012904 · HARLINGEN RIO GRANDE VLY INTL
Station distance: 7.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 22 usable years
Daylight: Calculated from latitude 26.24°, 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 HARLINGEN RIO GRANDE VLY INTL is what differs

Arroyo Colorado Estates Colonia→Arroyo Gardens→Lozano→Villa del Sol→Lasana→Santa Monica→

Or put two places side by side: Rio Hondo vs Arroyo Colorado Estates Colonia

Best time to visitRio Hondo.