United States · 1991–2020

Best time to visit
Wilsonville.

September leads for comfortable weather in Wilsonville: typically 26.7°C by day, 10°C at night, with 40 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high26.7°C

Typical low10°C

Rain in September40 mm

Comfort

September

September · May · June

80climate match

Beach

August

August · June · July

71climate match

Outdoors

October

October · September · May

82climate match

The weakest month is January, scoring 5 against September’s 80 — days reach only 4.9°C, 19° below the 24°C the score treats as ideal, and nights drop to -10.5°C.

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

54.9° / -10.5°

Feb

56.8° / -8.9°

Mar

2913° / -3.8°

Apr

5017.8° / 1.5°

May

7323° / 8.1°

Jun

7129° / 14.6°

Jul

5831.6° / 17.5°

Aug

6830.5° / 16°

Sep

8026.7° / 10°

Oct

6019.7° / 2°

Nov

2512.3° / -5°

Dec

55.5° / -9.8°

Monthly climate evidence for Wilsonville — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	4.9°C	-10.5°C	10 mm	2.1	9 h 36	5	Strong coverage
February	6.8°C	-8.9°C	15 mm	2.9	10 h 37	5	Strong coverage
March	13°C	-3.8°C	28 mm	3.6	11 h 49	29	Strong coverage
April	17.8°C	1.5°C	53 mm	5.8	13 h 12	50	Strong coverage
May	23°C	8.1°C	80 mm	8.4	14 h 22	73	Strong coverage
June	29°C	14.6°C	93 mm	7.6	15 h 00	71	Strong coverage
July	31.6°C	17.5°C	96 mm	7.2	14 h 45	58	Strong coverage
August	30.5°C	16°C	76 mm	6.1	13 h 45	68	Strong coverage
September	26.7°C	10°C	40 mm	4.3	12 h 24	80	Strong coverage
October	19.7°C	2°C	46 mm	4.4	11 h 04	60	Strong coverage
November	12.3°C	-5°C	21 mm	2.7	9 h 54	25	Strong coverage
December	5.5°C	-9.8°C	17 mm	2.4	9 h 20	5	Strong coverage

What has changed

Wilsonville 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

-2.0

Mar

+1.2

Apr

-1.0

May

-1.0

Jun

+0.5

Jul

-0.9

Aug

-1.1

Sep

+1.0

Oct

-0.7

Nov

+1.5

Dec

+1.2

September daytime highs, 2011–2025. Last recorded: 27.4°C.

Records at CAMBRIDGE, 1898–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	24.4°C26 Jan 1951	-35.6°C19 Jan 1943	31 mm27 Jan 1944	55 mm1944 · driest 0 mm in 1909	99
February	27.2°C22 Feb 2017	-34.4°C13 Feb 1905	24 mm11 Feb 1993	54 mm1958 · driest 0 mm in 1996	99
March	36.7°C22 Mar 2026	-30.0°C11 Mar 1948	63 mm14 Mar 2021	126 mm2021 · driest 0 mm in 2003	99
April	38.3°C28 Apr 1910	-16.7°C7 Apr 2018	98 mm17 Apr 2016	206 mm1944 · driest 0 mm in 2003	98
May	38.9°C28 May 2006	-6.7°C1 May 1909	103 mm21 May 1969	262 mm1961 · driest 0 mm in 1966	99
June	44.4°C27 Jun 2012	1.7°C4 Jun 1954	101 mm21 Jun 2019	268 mm2014 · driest 4 mm in 1911	99
July	46.7°C25 Jul 1936	5.6°C14 Jul 1990	113 mm9 Jul 2019	287 mm1993 · driest 13 mm in 1916	101
August	43.3°C16 Aug 1983	3.3°C26 Aug 1910	91 mm20 Aug 1964	182 mm2017 · driest 4 mm in 2004	97
September	41.7°C1 Sep 1985	-7.8°C29 Sep 1984	78 mm3 Sep 1943	146 mm1965 · driest 0 mm in 1998	95
October	37.8°C3 Oct 1916	-16.1°C29 Oct 1913	78 mm5 Oct 1946	226 mm1946 · driest 0 mm in 1975	95
November	34.4°C15 Nov 1990	-25.6°C28 Nov 1952	45 mm18 Nov 2015	83 mm1975 · driest 0 mm in 1959	97
December	27.8°C23 Dec 1964	-37.2°C23 Dec 1989	53 mm30 Dec 2006	128 mm1913 · driest 0 mm in 2002	99

Typical days per month at CAMBRIDGE, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	<1	3
February	<1	0	27	<1	3
March	2	<1	24	1	2
April	5	1	11	2	1
May	13	4	2	2	<1
June	24	14	0	3	0
July	28	21	0	3	0
August	28	17	0	3	0
September	20	10	<1	1	0
October	8	2	12	2	<1
November	1	<1	26	<1	2
December	0	0	29	<1	3

The best month has moved. On the 1961–1990 numbers the strongest month here was May (scoring 79); on 2011–2025 it is September (77). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in CAMBRIDGE’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	1%	7%	<1%	2%	0.3–8.4°C
February	6%	10%	2%	5%	2.2–12.1°C
March	21%	13%	3%	8%	8.4–17.3°C
April	44%	18%	6%	16%	15.7–21.9°C
May	60%	26%	10%	29%	21.5–26.4°C
June	73%	25%	10%	26%	26.7–32.0°C
July	78%	21%	9%	18%	30.0–34.8°C
August	81%	18%	8%	13%	29.0–34.4°C
September	79%	14%	5%	9%	24.8–30.3°C
October	57%	11%	4%	7%	18.4–23.5°C
November	17%	8%	2%	3%	9.4–15.7°C
December	1%	7%	1%	3%	1.7–9.4°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.

1904Each stripe is one year’s mean temperature against the 86-year average. Warmest: 1954. Coolest: 1993.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5700788
NOAA station: USC00251415 · CAMBRIDGE
Station distance: 19.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 40.11°, 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 CAMBRIDGE is what differs

Cambridge→Bartley→Holbrook→Lebanon→Shippee→

Or put two places side by side: Wilsonville vs Cambridge

Best time to visitWilsonville.