United States · 1991–2020

Best time to visit
Montavilla.

September leads for comfortable weather in Montavilla: typically 24.3°C by day, 11.7°C at night, with 45 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high24.3°C

Typical low11.7°C

Rain in September45 mm

Comfort

September

September · June · July

89climate match

Beach

July

July · August · September

77climate match

Outdoors

May

May · September · June

81climate match

The weakest month is January, scoring 5 against September’s 89 — days reach only 7.9°C, 16° 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

57.9° / 2.4°

Feb

1210.2° / 2.7°

Mar

2013.2° / 4.2°

Apr

4316.6° / 6.2°

May

6520.5° / 9.2°

Jun

8623.5° / 11.6°

Jul

8627.8° / 14°

Aug

8627.9° / 14.1°

Sep

8924.3° / 11.7°

Oct

4917.5° / 8°

Nov

1111.5° / 4.9°

Dec

57.5° / 2.2°

Monthly climate evidence for Montavilla — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	7.9°C	2.4°C	159 mm	16.7	9 h 04	5	Good coverage
February	10.2°C	2.7°C	109 mm	14.3	10 h 18	12	Good coverage
March	13.2°C	4.2°C	125 mm	16.4	11 h 46	20	Good coverage
April	16.6°C	6.2°C	87 mm	14	13 h 27	43	Strong coverage
May	20.5°C	9.2°C	73 mm	11.2	14 h 52	65	Good coverage
June	23.5°C	11.6°C	50 mm	7.7	15 h 40	86	Strong coverage
July	27.8°C	14°C	12 mm	2.2	15 h 21	86	Strong coverage
August	27.9°C	14.1°C	16 mm	2.2	14 h 07	86	Strong coverage
September	24.3°C	11.7°C	45 mm	5.5	12 h 28	89	Strong coverage
October	17.5°C	8°C	102 mm	11.3	10 h 51	49	Strong coverage
November	11.5°C	4.9°C	158 mm	16.3	9 h 26	11	Strong coverage
December	7.5°C	2.2°C	180 mm	16.7	8 h 43	5	Strong coverage

Records at PORTLAND WFO, 1996–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	19.4°C19 Jan 2005	-11.1°C13 Jan 2024	69 mm1 Jan 2009	314 mm2006 · driest 46 mm in 2001	30
February	18.9°C28 Feb 2025	-8.3°C6 Feb 2014	59 mm5 Feb 2017	286 mm2017 · driest 37 mm in 2005	30
March	27.2°C26 Mar 2025	-3.3°C4 Mar 2019	50 mm12 Mar 2026	228 mm2012 · driest 43 mm in 2019	30
April	32.2°C30 Apr 1998	-1.7°C1 Apr 2008	38 mm7 Apr 2018	151 mm2023 · driest 12 mm in 2021	31
May	35.6°C16 May 2008	1.7°C10 May 1999	32 mm31 May 1997	155 mm1998 · driest 8 mm in 2018	30
June	45.6°C28 Jun 2021	6.1°C1 Jun 2000	45 mm10 Jun 2022	131 mm2010 · driest 12 mm in 2003	31
July	40.6°C22 Jul 2006	7.8°C4 Jul 2012	19 mm17 Jul 2011	31 mm2011 · driest 0 mm in 2017	31
August	41.7°C14 Aug 2023	8.3°C24 Aug 2012	26 mm22 Aug 2004	86 mm2004 · driest 0 mm in 2012	30
September	36.7°C2 Sep 2017	3.9°C30 Sep 2019	53 mm14 Sep 1996	158 mm2013 · driest 2 mm in 2012	30
October	30.6°C2 Oct 2022	-2.2°C31 Oct 2006	74 mm31 Oct 2015	262 mm2016 · driest 31 mm in 2002	30
November	21.7°C13 Nov 1999	-8.9°C24 Nov 2010	75 mm19 Nov 1996	393 mm2006 · driest 41 mm in 2019	30
December	17.8°C4 Dec 2023	-10.0°C8 Dec 2013	81 mm7 Dec 2015	421 mm2015 · driest 52 mm in 2013	30

Typical days per month at PORTLAND WFO, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	8	6	<1
February	0	0	7	3	<1
March	<1	0	3	4	<1
April	2	<1	<1	2	0
May	7	2	0	2	0
June	11	4	0	2	0
July	22	10	0	<1	0
August	23	10	0	<1	0
September	13	4	0	1	0
October	1	0	<1	4	0
November	0	0	3	5	<1
December	0	0	8	6	<1

How often, not how much — every day in PORTLAND WFO’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%	53%	18%	68%	5.7–9.5°C
February	0%	50%	12%	69%	7.8–12.2°C
March	7%	52%	12%	71%	11.2–15.0°C
April	22%	45%	8%	62%	14.6–19.2°C
May	45%	35%	7%	44%	18.0–22.8°C
June	68%	24%	5%	26%	21.1–25.7°C
July	92%	6%	<1%	2%	25.9–30.3°C
August	92%	7%	2%	4%	26.6–29.7°C
September	74%	18%	4%	22%	22.6–25.8°C
October	24%	37%	11%	51%	16.1–19.5°C
November	<1%	54%	17%	73%	10.2–13.1°C
December	0%	55%	21%	75%	5.2–9.4°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.

1997Each stripe is one year’s mean temperature against the 28-year average. Warmest: 2015. Coolest: 2011.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5741247
NOAA station: USC00356750 · PORTLAND WFO
Station distance: 5.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 24 usable years
Daylight: Calculated from latitude 45.52°, 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 PORTLAND WFO is what differs

Lents→Mill Plain→Maywood Park→Gilbert→Hazelwood→Parkrose→

Or put two places side by side: Montavilla vs Lents

Best time to visitMontavilla.

September

July

May

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Montavilla.

The whole year,
without the guesswork.

Nearby, measured,
and named.