United States · 1991–2020

Best time to visit
Oregon.

September leads for comfortable weather in Oregon: typically 25.2°C by day, 10.5°C at night, with 74 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.2°C

Typical low10.5°C

Rain in September74 mm

Comfort

September

September · August · May

80climate match

Beach

August

August · July · June

67climate match

Outdoors

October

October · September · May

73climate match

The weakest month is January, scoring 5 against September’s 80 — days reach only -0.9°C, 25° 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

5-0.9° / -10.4°

Feb

51.7° / -8.4°

Mar

98.9° / -2.6°

Apr

4016.7° / 3.5°

May

6822.7° / 9.5°

Jun

6827.7° / 15°

Jul

6429.2° / 16.4°

Aug

7328.4° / 15.3°

Sep

8025.2° / 10.5°

Oct

5218° / 4.7°

Nov

169.5° / -1.3°

Dec

51.4° / -7.5°

Monthly climate evidence for Oregon — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-0.9°C	-10.4°C	48 mm	8	9 h 26	5	Good coverage
February	1.7°C	-8.4°C	51 mm	6.9	10 h 31	5	Good coverage
March	8.9°C	-2.6°C	66 mm	8.6	11 h 48	9	Good coverage
April	16.7°C	3.5°C	103 mm	9.9	13 h 17	40	Good coverage
May	22.7°C	9.5°C	117 mm	10.6	14 h 32	68	Good coverage
June	27.7°C	15°C	130 mm	9.7	15 h 13	68	Good coverage
July	29.2°C	16.4°C	119 mm	8.3	14 h 57	64	Good coverage
August	28.4°C	15.3°C	96 mm	7.3	13 h 52	73	Good coverage
September	25.2°C	10.5°C	74 mm	6.3	12 h 26	80	Good coverage
October	18°C	4.7°C	75 mm	7.4	11 h	52	Good coverage
November	9.5°C	-1.3°C	60 mm	7.1	9 h 45	16	Good coverage
December	1.4°C	-7.5°C	59 mm	8.2	9 h 08	5	Good coverage

Records at POLO 5NW, 1995–2017
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	16.1°C6 Jan 2008	-35.6°C16 Jan 2009	40 mm29 Jan 2001	92 mm1999 · driest 16 mm in 2016	22
February	21.7°C22 Feb 2017	-32.2°C3 Feb 1996	40 mm21 Feb 1997	115 mm2008 · driest 9 mm in 2003	22
March	28.9°C17 Mar 2012	-24.4°C4 Mar 2002	66 mm23 Mar 2009	172 mm2009 · driest 17 mm in 1996	22
April	32.8°C18 Apr 2002	-8.9°C5 Apr 1996	77 mm20 Apr 2000	214 mm2013 · driest 33 mm in 2005	22
May	36.7°C27 May 2012	-6.1°C3 May 2005	70 mm28 May 1996	279 mm1996 · driest 40 mm in 2005	22
June	37.2°C28 Jun 2012	3.9°C7 Jun 1998	132 mm4 Jun 2002	264 mm2009 · driest 35 mm in 2005	23
July	38.9°C7 Jul 2012	6.1°C2 Jul 2005	120 mm18 Jul 2007	252 mm2010 · driest 44 mm in 2005	23
August	36.1°C3 Aug 2012	4.4°C31 Aug 2009	60 mm3 Aug 2010	186 mm2007 · driest 18 mm in 2003	23
September	36.1°C9 Sep 2013	-2.8°C24 Sep 2012	62 mm28 Sep 1999	171 mm2001 · driest 8 mm in 2004	23
October	32.2°C3 Oct 1997	-8.3°C24 Oct 1999	64 mm17 Oct 1998	173 mm1998 · driest 6 mm in 2005	22
November	26.1°C1 Nov 2000	-18.3°C29 Nov 1995	50 mm25 Nov 2015	168 mm2015 · driest 9 mm in 2007	22
December	20.6°C4 Dec 1998	-27.8°C25 Dec 2000	44 mm10 Dec 2003	120 mm2008 · driest 15 mm in 1995	22

Typical days per month at POLO 5NW, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	29	1	7
February	0	0	26	2	5
March	<1	0	22	2	4
April	3	<1	8	4	<1
May	12	3	<1	4	<1
June	24	10	0	4	0
July	29	14	0	4	0
August	28	10	0	3	0
September	16	5	<1	2	0
October	5	<1	7	3	<1
November	<1	0	18	2	2
December	0	0	27	2	7

How often, not how much — every day in POLO 5NW’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%	26%	5%	28%	-3.7–2.9°C
February	<1%	25%	6%	28%	-4.1–5.3°C
March	6%	28%	6%	33%	5.6–11.7°C
April	24%	33%	12%	43%	15.0–19.1°C
May	49%	34%	13%	46%	20.3–25.3°C
June	66%	32%	14%	38%	26.3–29.0°C
July	73%	27%	12%	31%	27.2–30.8°C
August	76%	24%	11%	22%	26.3–29.9°C
September	71%	21%	7%	24%	23.0–27.4°C
October	31%	24%	8%	26%	15.7–20.1°C
November	6%	24%	7%	29%	5.2–13.4°C
December	<1%	27%	6%	29%	-2.1–4.8°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.

1996Each stripe is one year’s mean temperature against the 21-year average. Warmest: 2012. Coolest: 1996.2016

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4904898
NOAA station: USC00116897 · POLO 5NW
Station distance: 22.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 22 usable years
Daylight: Calculated from latitude 42.01°, 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 POLO 5NW is what differs

Mount Morris→Polo→Forreston→Milledgeville→Shannon→Leaf River→

Or put two places side by side: Oregon vs Mount Morris

Best time to visitOregon.