United States · 1991–2020

Best time to visit
Callao.

September leads for comfortable weather in Callao: typically 26.3°C by day, 12.9°C at night, with 107 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high26.3°C

Typical low12.9°C

Rain in September107 mm

Comfort

September

September · May · August

75climate match

Beach

August

August · July · June

73climate match

Outdoors

October

October · April · May

78climate match

The weakest month is January, scoring 5 against September’s 75 — days reach only 2.1°C, 22° 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

52.1° / -8.2°

Feb

55.2° / -5.9°

Mar

2511.8° / -0.3°

Apr

4818° / 5.5°

May

7123.6° / 11.6°

Jun

6128.8° / 16.8°

Jul

5431.1° / 19.1°

Aug

6230.4° / 17.8°

Sep

7526.3° / 12.9°

Oct

5819.5° / 6.3°

Nov

2611.6° / 0.1°

Dec

54.7° / -5.4°

Monthly climate evidence for Callao — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	2.1°C	-8.2°C	35 mm	4.6	9 h 38	5	Strong coverage
February	5.2°C	-5.9°C	44 mm	4.6	10 h 38	5	Strong coverage
March	11.8°C	-0.3°C	64 mm	6.8	11 h 49	25	Strong coverage
April	18°C	5.5°C	106 mm	9.3	13 h 12	48	Strong coverage
May	23.6°C	11.6°C	139 mm	10.2	14 h 21	71	Strong coverage
June	28.8°C	16.8°C	143 mm	8.9	14 h 58	61	Strong coverage
July	31.1°C	19.1°C	116 mm	7.8	14 h 43	54	Strong coverage
August	30.4°C	17.8°C	93 mm	7	13 h 44	62	Strong coverage
September	26.3°C	12.9°C	107 mm	6.5	12 h 24	75	Strong coverage
October	19.5°C	6.3°C	91 mm	6.8	11 h 05	58	Strong coverage
November	11.6°C	0.1°C	62 mm	5.7	9 h 56	26	Strong coverage
December	4.7°C	-5.4°C	42 mm	5.2	9 h 22	5	Strong coverage

Records at LONG BRANCH RSVR, 1989–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	22.2°C29 Jan 2013	-28.3°C28 Jan 1997	48 mm29 Jan 2001	84 mm2005 · driest 0 mm in 2022	34
February	23.3°C23 Feb 2017	-27.2°C3 Feb 1996	83 mm21 Feb 1997	145 mm1997 · driest 0 mm in 2026	33
March	28.9°C11 Mar 2026	-20.6°C12 Mar 1998	61 mm15 Mar 1990	148 mm1998 · driest 7 mm in 2013	36
April	31.7°C15 Apr 2006	-8.9°C2 Apr 2018	105 mm18 Apr 2013	200 mm2013 · driest 4 mm in 2018	36
May	35.0°C29 May 2018	0.0°C3 May 2005	129 mm7 May 1996	356 mm2019 · driest 13 mm in 2014	37
June	38.9°C29 Jun 2012	5.0°C16 Jun 2000	144 mm30 Jun 2017	308 mm2008 · driest 24 mm in 1992	36
July	40.6°C8 Jul 2012	9.4°C5 Jul 1997	188 mm25 Jul 2008	466 mm2008 · driest 21 mm in 2007	38
August	41.1°C18 Aug 2003	8.3°C15 Aug 1994	80 mm8 Aug 2007	222 mm2004 · driest 0 mm in 2013	36
September	38.3°C3 Sep 2000	-1.1°C22 Sep 1995	179 mm10 Sep 2014	243 mm2008 · driest 7 mm in 2023	36
October	34.4°C4 Oct 2006	-6.1°C31 Oct 1993	132 mm5 Oct 1998	220 mm1998 · driest 16 mm in 2010	35
November	26.7°C2 Nov 2016	-18.3°C8 Nov 1991	54 mm1 Nov 1992	233 mm1992 · driest 5 mm in 2022	32
December	23.3°C16 Dec 2021	-33.3°C23 Dec 1989	78 mm10 Dec 2003	109 mm2003 · driest 0 mm in 2019	34

Typical days per month at LONG BRANCH RSVR, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	26	1	2
February	0	0	22	1	2
March	1	0	17	2	<1
April	5	<1	5	4	<1
May	14	3	0	4	0
June	24	13	0	4	0
July	29	20	0	3	0
August	27	17	0	3	0
September	18	8	<1	3	0
October	7	1	4	3	<1
November	<1	0	15	2	<1
December	0	0	24	1	2

How often, not how much — every day in LONG BRANCH RSVR’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	0%	16%	4%	10%	-0.6–5.9°C
February	3%	17%	5%	11%	0.5–9.1°C
March	12%	24%	8%	20%	8.6–14.8°C
April	31%	31%	13%	42%	15.4–20.2°C
May	53%	33%	14%	37%	21.3–26.0°C
June	69%	30%	14%	37%	27.7–30.3°C
July	74%	26%	11%	23%	28.6–33.1°C
August	78%	23%	10%	25%	27.7–32.6°C
September	73%	21%	10%	20%	23.9–28.5°C
October	42%	22%	10%	23%	17.5–21.5°C
November	12%	19%	8%	17%	7.9–15.9°C
December	<1%	18%	4%	15%	1.6–7.2°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.

1990Each stripe is one year’s mean temperature against the 28-year average. Warmest: 2012. Coolest: 1993.2020

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4379566
NOAA station: USC00235050 · LONG BRANCH RSVR
Station distance: 10.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 26 usable years
Daylight: Calculated from latitude 39.76°, 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 LONG BRANCH RSVR is what differs

Macon→Bevier→Atlanta→New Cambria→Jacksonville→Ethel→

Or put two places side by side: Callao vs Macon

Best time to visitCallao.