United States · 1991–2020

Best time to visit
O'Brien.

May leads for comfortable weather in O'Brien: typically 24.1°C by day, 5.8°C at night, with 55 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMay

Typical high24.1°C

Typical low5.8°C

Rain in May55 mm

Comfort

May

May · June · September

77climate match

Beach

June

June · July · September

63climate match

Outdoors

May

May · June · October

72climate match

The weakest month is January, scoring 5 against May’s 77 — days reach only 9.2°C, 15° below the 24°C the score treats as ideal, and 256 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

59.2° / 0.5°

Feb

512.6° / 1.1°

Mar

1515.5° / 1.8°

Apr

4418.9° / 3°

May

7724.1° / 5.8°

Jun

7328.5° / 8.4°

Jul

5934.3° / 11.3°

Aug

5833.9° / 9.9°

Sep

6430.7° / 7.1°

Oct

6222.1° / 4°

Nov

712.6° / 2.6°

Dec

58.2° / 0.6°

Monthly climate evidence for O'Brien — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	9.2°C	0.5°C	256 mm	14.5	9 h 25	5	Strong coverage
February	12.6°C	1.1°C	203 mm	12.6	10 h 30	5	Strong coverage
March	15.5°C	1.8°C	202 mm	13.8	11 h 48	15	Strong coverage
April	18.9°C	3°C	108 mm	10.7	13 h 17	44	Strong coverage
May	24.1°C	5.8°C	55 mm	6.8	14 h 32	77	Strong coverage
June	28.5°C	8.4°C	22 mm	3.2	15 h 14	73	Strong coverage
July	34.3°C	11.3°C	7 mm	1	14 h 57	59	Strong coverage
August	33.9°C	9.9°C	7 mm	1.1	13 h 52	58	Strong coverage
September	30.7°C	7.1°C	18 mm	2.2	12 h 26	64	Strong coverage
October	22.1°C	4°C	97 mm	6.4	11 h	62	Strong coverage
November	12.6°C	2.6°C	207 mm	13.2	9 h 44	7	Strong coverage
December	8.2°C	0.6°C	337 mm	15.9	9 h 07	5	Strong coverage

Records at CAVE JUNCTION 1 WNW, 1962–2016
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	18.9°C21 Jan 1981	-11.7°C12 Jan 1963	126 mm12 Jan 1980	645 mm1995 · driest 14 mm in 1985	54
February	24.4°C25 Feb 1992	-15.6°C7 Feb 1989	107 mm6 Feb 2015	573 mm1986 · driest 3 mm in 1988	54
March	27.8°C30 Mar 2003	-6.7°C28 Mar 1987	88 mm18 Mar 1975	493 mm1995 · driest 18 mm in 1965	55
April	36.7°C21 Apr 2009	-6.1°C16 Apr 1963	64 mm27 Apr 2010	333 mm1982 · driest 7 mm in 1973	55
May	42.2°C16 May 2008	-2.8°C8 May 2002	92 mm31 May 1990	232 mm1990 · driest 0 mm in 1982	55
June	42.8°C26 Jun 2015	-2.2°C1 Jun 1966	42 mm4 Jun 2010	81 mm2010 · driest 0 mm in 2003	55
July	45.0°C2 Jul 2015	2.2°C3 Jul 1962	25 mm1 Jul 1983	36 mm1983 · driest 0 mm in 1996	55
August	45.6°C14 Aug 2008	1.1°C25 Aug 1969	43 mm30 Aug 1983	94 mm1968 · driest 0 mm in 2011	55
September	43.3°C1 Sep 1998	-3.9°C14 Sep 1970	89 mm28 Sep 1977	164 mm1977 · driest 0 mm in 2005	54
October	37.8°C1 Oct 2001	-9.4°C31 Oct 2002	102 mm9 Oct 1962	508 mm2016 · driest 0 mm in 1978	53
November	25.6°C6 Nov 1991	-11.7°C1 Nov 2002	156 mm18 Nov 1996	765 mm1973 · driest 46 mm in 2004	55
December	20.6°C17 Dec 1979	-21.1°C10 Dec 1972	206 mm22 Dec 1964	896 mm1996 · driest 30 mm in 1976	54

Typical days per month at CAVE JUNCTION 1 WNW, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	16	8	<1
February	0	0	12	6	<1
March	1	0	11	6	<1
April	5	1	6	4	<1
May	14	6	1	2	0
June	22	13	<1	<1	0
July	30	26	0	<1	0
August	30	26	0	<1	0
September	25	18	<1	<1	0
October	10	3	5	3	0
November	0	0	8	6	<1
December	0	0	15	10	1

How often, not how much — every day in CAVE JUNCTION 1 WNW’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%	45%	25%	57%	7.2–10.2°C
February	4%	43%	22%	58%	9.7–14.7°C
March	18%	43%	20%	55%	12.2–17.8°C
April	35%	33%	12%	40%	15.0–21.8°C
May	67%	19%	5%	20%	20.7–26.5°C
June	86%	10%	2%	7%	25.3–30.2°C
July	97%	3%	<1%	1%	29.6–35.7°C
August	95%	5%	1%	4%	29.3–35.3°C
September	89%	9%	3%	9%	25.5–32.4°C
October	56%	22%	10%	29%	18.1–24.0°C
November	2%	45%	24%	63%	10.0–14.1°C
December	<1%	48%	28%	63%	6.3–9.7°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.

1963Each stripe is one year’s mean temperature against the 50-year average. Warmest: 2014. Coolest: 1971.2015

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5554837
NOAA station: USC00351448 · CAVE JUNCTION 1 WNW
Station distance: 11.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 25 usable years
Daylight: Calculated from latitude 42.07°, 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 CAVE JUNCTION 1 WNW is what differs

Cave Junction→Selma→Kerby→Takilma→Idlewild→Allentown (historical)→

Or put two places side by side: O'Brien vs Cave Junction

Best time to visitO'Brien.

May

June

May

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
O'Brien.

The whole year,
without the guesswork.

Nearby, measured,
and named.