United States · 1991–2020

Best time to visit
Ilwaco.

July leads for comfortable weather in Ilwaco: typically 18.8°C by day, 11.6°C at night, with 28 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high18.8°C

Typical low11.6°C

Rain in July28 mm

Comfort

July

July · August · September

74climate match

Beach

July

July · August · September

41climate match

Outdoors

July

July · August · September

91climate match

The weakest month is January, scoring 5 against July’s 74 — days reach only 9.6°C, 14° below the 24°C the score treats as ideal, and 327 mm of rain falls.

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

59.6° / 2.8°

Feb

510.7° / 2.7°

Mar

511.7° / 3.6°

Apr

1513.1° / 5.2°

May

4115.3° / 7.9°

Jun

5617° / 9.9°

Jul

7418.8° / 11.6°

Aug

7419.3° / 11.5°

Sep

6619.2° / 9.2°

Oct

2515.8° / 6.4°

Nov

511.8° / 4.1°

Dec

59.3° / 2.6°

Monthly climate evidence for Ilwaco — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 10 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	9.6°C	2.8°C	327 mm	20.2	9.1°C	8 h 59	5	Strong coverage
February	10.7°C	2.7°C	206 mm	16.1	9.0°C	10 h 15	5	Strong coverage
March	11.7°C	3.6°C	248 mm	20.1	9.4°C	11 h 45	5	Strong coverage
April	13.1°C	5.2°C	172 mm	16.9	10.5°C	13 h 29	15	Strong coverage
May	15.3°C	7.9°C	101 mm	12.1	12.3°C	14 h 57	41	Strong coverage
June	17°C	9.9°C	73 mm	10.4	13.9°C	15 h 46	56	Strong coverage
July	18.8°C	11.6°C	28 mm	5.4	14.5°C	15 h 27	74	Strong coverage
August	19.3°C	11.5°C	44 mm	6.9	14.7°C	14 h 10	74	Strong coverage
September	19.2°C	9.2°C	60 mm	7.7	14.4°C	12 h 29	66	Strong coverage
October	15.8°C	6.4°C	187 mm	15.7	12.9°C	10 h 49	25	Strong coverage
November	11.8°C	4.1°C	295 mm	19.1	11.1°C	9 h 21	5	Strong coverage
December	9.3°C	2.6°C	309 mm	20.8	9.7°C	8 h 37	5	Good coverage

What has changed

Ilwaco runs +0.1°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

+0.2

Feb

-0.8

Mar

-0.4

Apr

+0.3

May

+0.2

Jun

+0.7

Jul

+0.4

Aug

+0.6

Sep

0.0

Oct

+0.1

Nov

0.0

Dec

-0.4

July daytime highs, 2011–2018. Last recorded: 19.4°C.

Records at LONG BEACH EXP STN, 1967–2018
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	18.3°C13 Jan 1981	-13.3°C29 Jan 1980	225 mm9 Jan 2000	531 mm2006 · driest 20 mm in 1985	51
February	23.3°C28 Feb 1968	-12.8°C4 Feb 1989	95 mm10 Feb 1990	538 mm1999 · driest 37 mm in 1993	51
March	22.8°C13 Mar 2018	-3.9°C3 Mar 1989	93 mm29 Mar 1983	434 mm2012 · driest 23 mm in 2015	51
April	27.8°C27 Apr 1987	-3.3°C5 Apr 1975	76 mm4 Apr 2012	327 mm1996 · driest 21 mm in 2013	51
May	28.3°C4 May 1992	-1.1°C17 May 1974	66 mm31 May 1968	182 mm1978 · driest 7 mm in 2016	50
June	27.8°C1 Jun 1978	1.1°C4 Jun 1980	68 mm12 Jun 2000	172 mm1981 · driest 4 mm in 2015	51
July	30.0°C23 Jul 2004	3.3°C19 Jul 1984	62 mm23 Jul 2007	163 mm1983 · driest 3 mm in 2013	51
August	31.7°C22 Aug 2018	2.2°C19 Aug 1973	50 mm16 Aug 1976	140 mm2004 · driest 1 mm in 2006	52
September	33.3°C25 Sep 1974	-1.7°C22 Sep 2017	70 mm17 Sep 1997	273 mm1978 · driest 1 mm in 2012	52
October	30.6°C7 Oct 1987	-6.1°C28 Oct 1971	100 mm29 Oct 1982	411 mm1975 · driest 14 mm in 1987	52
November	22.2°C1 Nov 1969	-9.4°C24 Nov 1985	127 mm24 Nov 1990	514 mm1983 · driest 48 mm in 2017	52
December	19.4°C19 Dec 2004	-17.8°C8 Dec 1972	97 mm20 Dec 2012	532 mm1968 · driest 42 mm in 2009	52

Typical days per month at LONG BEACH EXP STN, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	9	9
February	0	0	8	6
March	0	0	5	7
April	<1	0	1	5
May	<1	0	0	3
June	<1	0	0	2
July	<1	0	0	<1
August	1	<1	0	1
September	2	<1	<1	2
October	<1	0	1	5
November	0	0	7	8
December	0	0	9	8

How often, not how much — every day in LONG BEACH EXP STN’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%	66%	33%	83%	7.5–11.6°C
February	1%	60%	27%	77%	8.6–13.0°C
March	2%	63%	27%	78%	9.8–13.8°C
April	4%	55%	18%	73%	12.0–14.8°C
May	6%	41%	11%	53%	13.7–16.5°C
June	6%	34%	8%	44%	15.7–18.1°C
July	21%	19%	3%	19%	17.5–19.9°C
August	29%	21%	4%	25%	17.8–20.3°C
September	28%	30%	9%	38%	17.7–21.2°C
October	10%	48%	20%	65%	14.6–17.2°C
November	1%	66%	33%	87%	10.5–13.5°C
December	0%	67%	33%	84%	7.4–10.8°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.

1968Each stripe is one year’s mean temperature against the 50-year average. Warmest: 1995. Coolest: 1985.2018

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5798171
NOAA station: USC00454748 · LONG BEACH EXP STN
Station distance: 6.5 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 24 usable years
Daylight: Calculated from latitude 46.31°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 10 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 LONG BEACH EXP STN is what differs

Ocean Park→Long Beach→Chinook→Naselle→Breakers→Fort Canby→

Or put two places side by side: Ilwaco vs Ocean Park

Best time to visitIlwaco.

July

July

July

The whole year,without the guesswork.

Ilwaco runs +0.1°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Ilwaco.

The whole year,
without the guesswork.

Ilwaco runs +0.1°C
on the 1961–1990 baseline.

Nearby, measured,
and named.